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Sample records for pol ii paralogs

  1. Enhancer SINEs Link Pol III to Pol II Transcription in Neurons

    Directory of Open Access Journals (Sweden)

    Cristina Policarpi

    2017-12-01

    Full Text Available Summary: Spatiotemporal regulation of gene expression depends on the cooperation of multiple mechanisms, including the functional interaction of promoters with distally located enhancers. Here, we show that, in cortical neurons, a subset of short interspersed nuclear elements (SINEs located in the proximity of activity-regulated genes bears features of enhancers. Enhancer SINEs (eSINEs recruit the Pol III cofactor complex TFIIIC in a stimulus-dependent manner and are transcribed by Pol III in response to neuronal depolarization. Characterization of an eSINE located in proximity to the Fos gene (FosRSINE1 indicated that the FosRSINE1-encoded transcript interacts with Pol II at the Fos promoter and mediates Fos relocation to Pol II factories, providing an unprecedented molecular link between Pol III and Pol II transcription. Strikingly, knockdown of the FosRSINE1 transcript induces defects of both cortical radial migration in vivo and activity-dependent dendritogenesis in vitro, demonstrating that FosRSINE1 acts as a strong enhancer of Fos expression in diverse physiological contexts. : Spatiotemporal regulation of gene expression requires the interaction between promoters and distally located enhancers. Policarpi et al. identify a subset of SINEs that functions as enhancers for activity-dependent neuronal genes. The enhancer SINE FosRSINE1 regulates Fos transcription and is necessary for both activity-dependent dendritogenesis and proper brain development. Keywords: neuroscience, epigenetics, transcription, enhancers, SINEs, neuronal activity, neuronal development

  2. Involvement of specialized DNA polymerases Pol II, Pol IV and DnaE2 in DNA replication in the absence of Pol I in Pseudomonas putida

    International Nuclear Information System (INIS)

    Sidorenko, Julia; Jatsenko, Tatjana; Saumaa, Signe; Teras, Riho; Tark-Dame, Mariliis; Horak, Rita; Kivisaar, Maia

    2011-01-01

    The majority of bacteria possess a different set of specialized DNA polymerases than those identified in the most common model organism Escherichia coli. Here, we have studied the ability of specialized DNA polymerases to substitute Pol I in DNA replication in Pseudomonas putida. Our results revealed that P. putida Pol I-deficient cells have severe growth defects in LB medium, which is accompanied by filamentous cell morphology. However, growth of Pol I-deficient bacteria on solid rich medium can be restored by reduction of reactive oxygen species in cells. Also, mutants with improved growth emerge rapidly. Similarly to the initial Pol I-deficient P. putida, its adapted derivatives express a moderate mutator phenotype, which indicates that DNA replication carried out in the absence of Pol I is erroneous both in the original Pol I-deficient bacteria and the adapted derivatives. Analysis of the spectra of spontaneous Rif r mutations in P. putida strains lacking different DNA polymerases revealed that the presence of specialized DNA polymerases Pol II and Pol IV influences the frequency of certain base substitutions in Pol I-proficient and Pol I-deficient backgrounds in opposite ways. Involvement of another specialized DNA polymerase DnaE2 in DNA replication in Pol I-deficient bacteria is stimulated by UV irradiation of bacteria, implying that DnaE2-provided translesion synthesis partially substitutes the absence of Pol I in cells containing heavily damaged DNA.

  3. File list: Pol.Oth.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Oth.20.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Others S...RX1027436,SRX1027435,SRX1027434,SRX1027433,SRX668218,SRX099880,SRX099879 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Oth.20.RNA_polymerase_II.AllCell.bed ...

  4. File list: Pol.Myo.05.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Myo.05.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II Muscle SR.../dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Myo.05.RNA_Polymerase_II.AllCell.bed ...

  5. File list: Pol.YSt.10.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.YSt.10.RNA_Polymerase_II.AllCell sacCer3 RNA polymerase RNA Polymerase II Yeast... strain SRX092435,SRX360917,SRX360914,SRX497380,SRX497382,SRX497381,SRX360915 http://dbarchive.biosciencedbc.jp/kyushu-u/sacCer3/assembled/Pol.YSt.10.RNA_Polymerase_II.AllCell.bed ...

  6. File list: Pol.Lar.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Lar.05.RNA_polymerase_II.AllCell dm3 RNA polymerase RNA polymerase II Larvae SR...SRX151962,SRX182775,SRX661503,SRX013070,SRX013072,SRX013113,SRX013082,SRX151961 http://dbarchive.biosciencedbc.jp/kyushu-u/dm3/assembled/Pol.Lar.05.RNA_polymerase_II.AllCell.bed ...

  7. File list: Pol.CDV.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.CDV.10.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Cardiova...,SRX080152,SRX080153,SRX367018,SRX367016 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.CDV.10.RNA_polymerase_II.AllCell.bed ...

  8. File list: Pol.Lar.05.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Lar.05.RNA_Polymerase_II.AllCell ce10 RNA polymerase RNA Polymerase II Larvae h...ttp://dbarchive.biosciencedbc.jp/kyushu-u/ce10/assembled/Pol.Lar.05.RNA_Polymerase_II.AllCell.bed ...

  9. File list: Pol.Bld.20.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Bld.20.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II Blood SRX...tp://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Bld.20.RNA_Polymerase_II.AllCell.bed ...

  10. File list: Pol.Epd.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Epd.50.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Epidermi...247,SRX080162,SRX807622 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Epd.50.RNA_polymerase_II.AllCell.bed ...

  11. File list: Pol.Lng.10.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Lng.10.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II Lung SRX1...43816,SRX062976,SRX020252 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Lng.10.RNA_Polymerase_II.AllCell.bed ...

  12. File list: Pol.Emb.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Emb.10.RNA_polymerase_II.AllCell ce10 RNA polymerase RNA polymerase II Embryo S...,SRX043867 http://dbarchive.biosciencedbc.jp/kyushu-u/ce10/assembled/Pol.Emb.10.RNA_polymerase_II.AllCell.bed ...

  13. File list: Pol.Utr.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Utr.05.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Uterus S...SRX573070,SRX027921,SRX1048949,SRX1136641,SRX1136638,SRX099217 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Utr.05.RNA_polymerase_II.AllCell.bed ...

  14. File list: Pol.Neu.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Neu.20.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Neural S...6,SRX743838,SRX743832,SRX743834,SRX743840 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Neu.20.RNA_polymerase_II.AllCell.bed ...

  15. File list: Pol.Plc.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Plc.50.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Placenta... http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Plc.50.RNA_polymerase_II.AllCell.bed ...

  16. File list: Pol.Oth.05.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Oth.05.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II Others SR...X143827,SRX112963,SRX736456,SRX736457,SRX112981,SRX143834,SRX335666,SRX957689 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Oth.05.RNA_Polymerase_II.AllCell.bed ...

  17. File list: Pol.Emb.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Emb.20.RNA_polymerase_II.AllCell ce10 RNA polymerase RNA polymerase II Embryo S...,SRX043869 http://dbarchive.biosciencedbc.jp/kyushu-u/ce10/assembled/Pol.Emb.20.RNA_polymerase_II.AllCell.bed ...

  18. File list: Pol.Gon.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Gon.20.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Gonad ht...tp://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Gon.20.RNA_polymerase_II.AllCell.bed ...

  19. File list: Pol.Unc.05.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Unc.05.RNA_Polymerase_II.AllCell ce10 RNA polymerase RNA Polymerase II Unclassi...fied http://dbarchive.biosciencedbc.jp/kyushu-u/ce10/assembled/Pol.Unc.05.RNA_Polymerase_II.AllCell.bed ...

  20. File list: Pol.Adp.50.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Adp.50.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II Adipocyte... SRX800011,SRX800010,SRX341031,SRX341032,SRX341029,SRX800016,SRX800017,SRX341030 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Adp.50.RNA_Polymerase_II.AllCell.bed ...

  1. File list: Pol.ALL.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.ALL.05.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II All cell...,SRX1013886,SRX1013900 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.ALL.05.RNA_polymerase_II.AllCell.bed ...

  2. File list: Pol.CDV.20.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.CDV.20.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II Cardiovas...X320034,SRX346170,SRX346169,SRX373605,SRX680476 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.CDV.20.RNA_Polymerase_II.AllCell.bed ...

  3. File list: Pol.Unc.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Unc.05.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Unclassi...fied http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Unc.05.RNA_polymerase_II.AllCell.bed ...

  4. File list: Pol.Spl.10.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Spl.10.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II Spleen SR...X062981,SRX143838,SRX020253 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Spl.10.RNA_Polymerase_II.AllCell.bed ...

  5. File list: Pol.Unc.05.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Unc.05.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II Unclassif...ied SRX254629 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Unc.05.RNA_Polymerase_II.AllCell.bed ...

  6. File list: Pol.ALL.20.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.ALL.20.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II All cell ...//dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.ALL.20.RNA_Polymerase_II.AllCell.bed ...

  7. File list: Pol.Unc.10.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Unc.10.RNA_Polymerase_II.AllCell ce10 RNA polymerase RNA Polymerase II Unclassi...fied http://dbarchive.biosciencedbc.jp/kyushu-u/ce10/assembled/Pol.Unc.10.RNA_Polymerase_II.AllCell.bed ...

  8. File list: Pol.Neu.20.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Neu.20.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II Neural SR...,SRX685285,SRX217736 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Neu.20.RNA_Polymerase_II.AllCell.bed ...

  9. File list: Pol.Bld.50.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Bld.50.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II Blood SRX...tp://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Bld.50.RNA_Polymerase_II.AllCell.bed ...

  10. File list: Pol.Pup.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Pup.10.RNA_polymerase_II.AllCell dm3 RNA polymerase RNA polymerase II Pupae SRX...013069 http://dbarchive.biosciencedbc.jp/kyushu-u/dm3/assembled/Pol.Pup.10.RNA_polymerase_II.AllCell.bed ...

  11. File list: Pol.Emb.50.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Emb.50.RNA_Polymerase_II.AllCell ce10 RNA polymerase RNA Polymerase II Embryo h...ttp://dbarchive.biosciencedbc.jp/kyushu-u/ce10/assembled/Pol.Emb.50.RNA_Polymerase_II.AllCell.bed ...

  12. File list: Pol.Unc.20.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Unc.20.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II Unclassif...ied SRX254629 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Unc.20.RNA_Polymerase_II.AllCell.bed ...

  13. File list: Pol.Lng.05.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Lng.05.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II Lung SRX0...62976,SRX143816,SRX020252 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Lng.05.RNA_Polymerase_II.AllCell.bed ...

  14. File list: Pol.Lng.20.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Lng.20.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II Lung SRX0...62976,SRX143816,SRX020252 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Lng.20.RNA_Polymerase_II.AllCell.bed ...

  15. File list: Pol.Gon.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Gon.50.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Gonad ht...tp://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Gon.50.RNA_polymerase_II.AllCell.bed ...

  16. File list: Pol.Kid.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Kid.20.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Kidney S...SRX1206072,SRX1206066,SRX326423,SRX1206067,SRX003883,SRX003882,SRX367323 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Kid.20.RNA_polymerase_II.AllCell.bed ...

  17. File list: Pol.Adl.05.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Adl.05.RNA_Polymerase_II.AllCell ce10 RNA polymerase RNA Polymerase II Adult SR...SRX1388757,SRX1388756 http://dbarchive.biosciencedbc.jp/kyushu-u/ce10/assembled/Pol.Adl.05.RNA_Polymerase_II.AllCell.bed ...

  18. File list: Pol.PSC.50.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.PSC.50.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II Pluripote...SRX213760,SRX213764 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.PSC.50.RNA_Polymerase_II.AllCell.bed ...

  19. File list: Pol.Epd.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Epd.10.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Epidermi...246,SRX663247,SRX807622 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Epd.10.RNA_polymerase_II.AllCell.bed ...

  20. File list: Pol.Epd.10.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Epd.10.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II Epidermis... http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Epd.10.RNA_Polymerase_II.AllCell.bed ...

  1. File list: Pol.Brs.10.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Brs.10.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II Breast SR...078990 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Brs.10.RNA_Polymerase_II.AllCell.bed ...

  2. File list: Pol.Dig.20.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Dig.20.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II Digestive... tract SRX112957,SRX143802 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Dig.20.RNA_Polymerase_II.AllCell.bed ...

  3. File list: Pol.Spl.05.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Spl.05.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II Spleen SR...X062981,SRX143838,SRX020253 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Spl.05.RNA_Polymerase_II.AllCell.bed ...

  4. File list: Pol.PSC.20.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.PSC.20.RNA_Polymerase_II.AllCell mm9 RNA polymerase RNA Polymerase II Pluripote...SRX213760,SRX213764 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.PSC.20.RNA_Polymerase_II.AllCell.bed ...

  5. File list: Pol.Pup.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Pup.05.RNA_polymerase_II.AllCell dm3 RNA polymerase RNA polymerase II Pupae SRX...013069 http://dbarchive.biosciencedbc.jp/kyushu-u/dm3/assembled/Pol.Pup.05.RNA_polymerase_II.AllCell.bed ...

  6. File list: Pol.Unc.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Unc.50.RNA_polymerase_II.AllCell ce10 RNA polymerase RNA polymerase II Unclassi...p://dbarchive.biosciencedbc.jp/kyushu-u/ce10/assembled/Pol.Unc.50.RNA_polymerase_II.AllCell.bed ...

  7. File list: Pol.Plc.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Plc.10.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Placenta... http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Plc.10.RNA_polymerase_II.AllCell.bed ...

  8. File list: Pol.Unc.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Unc.05.RNA_polymerase_II.AllCell dm3 RNA polymerase RNA polymerase II Unclassif...ied SRX110774 http://dbarchive.biosciencedbc.jp/kyushu-u/dm3/assembled/Pol.Unc.05.RNA_polymerase_II.AllCell.bed ...

  9. File list: Pol.ALL.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.ALL.05.RNA_polymerase_II.AllCell dm3 RNA polymerase RNA polymerase II All cell ...013077,SRX050604,SRX050605 http://dbarchive.biosciencedbc.jp/kyushu-u/dm3/assembled/Pol.ALL.05.RNA_polymerase_II.AllCell.bed ...

  10. File list: Pol.Adp.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Adp.50.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Adipocyt...e SRX682084,SRX682086,SRX682085,SRX682083 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Adp.50.RNA_polymerase_II.AllCell.bed ...

  11. File list: Pol.ALL.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.ALL.10.RNA_polymerase_II.AllCell ce10 RNA polymerase RNA polymerase II All cell...3965,SRX043869,SRX043867,SRX043875,SRX043967,SRX043881,SRX043879 http://dbarchive.biosciencedbc.jp/kyushu-u/ce10/assembled/Pol.ALL.10.RNA_polymerase_II.AllCell.bed ...

  12. File list: Pol.ALL.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.ALL.05.RNA_polymerase_II.AllCell sacCer3 RNA polymerase RNA polymerase II All c...ell types http://dbarchive.biosciencedbc.jp/kyushu-u/sacCer3/assembled/Pol.ALL.05.RNA_polymerase_II.AllCell.bed ...

  13. File list: Pol.Emb.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Emb.50.RNA_polymerase_II.AllCell dm3 RNA polymerase RNA polymerase II Embryo SR...7582,SRX050604,SRX050605,SRX013073 http://dbarchive.biosciencedbc.jp/kyushu-u/dm3/assembled/Pol.Emb.50.RNA_polymerase_II.AllCell.bed ...

  14. File list: Pol.Epd.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Epd.20.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Epidermi...248,SRX663247,SRX807622 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Epd.20.RNA_polymerase_II.AllCell.bed ...

  15. File list: Pol.Plc.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Plc.05.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Placenta... http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Plc.05.RNA_polymerase_II.AllCell.bed ...

  16. File list: Pol.Unc.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Unc.20.RNA_polymerase_II.AllCell ce10 RNA polymerase RNA polymerase II Unclassi...p://dbarchive.biosciencedbc.jp/kyushu-u/ce10/assembled/Pol.Unc.20.RNA_polymerase_II.AllCell.bed ...

  17. File list: Pol.Kid.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Kid.10.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Kidney S...X1206068,SRX1206073,SRX1206074,SRX1206072,SRX1206071,SRX003882,SRX367323 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Kid.10.RNA_polymerase_II.AllCell.bed ...

  18. File list: Pol.Adl.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  19. File list: Pol.Prs.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  20. File list: Pol.PSC.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  1. File list: Pol.Utr.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  2. File list: Pol.Adl.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  3. File list: Pol.Emb.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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  4. File list: Pol.Dig.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  5. File list: Pol.Neu.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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  6. File list: Pol.Emb.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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  7. File list: Pol.Liv.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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  8. File list: Pol.Prs.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  9. File list: Pol.Pan.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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  10. File list: Pol.Neu.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  11. File list: Pol.Lng.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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  12. File list: Pol.Unc.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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  13. File list: Pol.Unc.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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  14. File list: Pol.Lar.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  15. File list: Pol.Prs.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  16. File list: Pol.Bon.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  17. File list: Pol.Myo.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  18. File list: Pol.ALL.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  19. File list: Pol.Oth.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  20. File list: Pol.Bld.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  1. File list: Pol.Myo.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Myo.10.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Muscle h...ttp://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Myo.10.RNA_polymerase_II.AllCell.bed ...

  2. File list: Pol.Myo.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  3. File list: Pol.Emb.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  4. File list: Pol.ALL.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  5. File list: Pol.Liv.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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    Full Text Available Pol.Liv.50.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Liver SR...1013886 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Liv.50.RNA_polymerase_II.AllCell.bed ...

  6. File list: Pol.Kid.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  7. File list: Pol.Plc.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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    Full Text Available Pol.Plc.20.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Placenta... http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Plc.20.RNA_polymerase_II.AllCell.bed ...

  8. File list: Pol.Pan.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Pan.50.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Pancreas... SRX190244 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Pan.50.RNA_polymerase_II.AllCell.bed ...

  9. File list: Pol.Bon.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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    Full Text Available Pol.Bon.10.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Bone SRX...,SRX351408 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Bon.10.RNA_polymerase_II.AllCell.bed ...

  10. File list: Pol.Bld.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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  11. File list: Pol.Epd.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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  12. File list: Pol.Emb.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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  13. File list: Pol.Myo.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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    Full Text Available Pol.Myo.20.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Muscle h...ttp://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Myo.20.RNA_polymerase_II.AllCell.bed ...

  14. File list: Pol.ALL.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  15. File list: Pol.Unc.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  16. File list: Pol.Unc.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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  17. File list: Pol.PSC.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  18. File list: Pol.Kid.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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  19. File list: Pol.Unc.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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  20. File list: Pol.Dig.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  1. File list: Pol.Prs.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Prs.20.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Prostate...557,SRX173197,SRX173198 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Prs.20.RNA_polymerase_II.AllCell.bed ...

  2. File list: Pol.YSt.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.YSt.20.RNA_polymerase_II.AllCell sacCer3 RNA polymerase RNA polymerase II Yeast... strain http://dbarchive.biosciencedbc.jp/kyushu-u/sacCer3/assembled/Pol.YSt.20.RNA_polymerase_II.AllCell.bed ...

  3. File list: Pol.ALL.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.ALL.50.RNA_polymerase_II.AllCell sacCer3 RNA polymerase RNA polymerase II All c...ell types http://dbarchive.biosciencedbc.jp/kyushu-u/sacCer3/assembled/Pol.ALL.50.RNA_polymerase_II.AllCell.bed ...

  4. File list: Pol.Lng.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Lng.05.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Lung SRX... http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Lng.05.RNA_polymerase_II.AllCell.bed ...

  5. File list: Pol.Oth.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  6. File list: Pol.Pan.05.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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    Full Text Available Pol.Pan.05.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Pancreas... SRX190244 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Pan.05.RNA_polymerase_II.AllCell.bed ...

  7. File list: Pol.Unc.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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  8. File list: Pol.Lng.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  9. File list: Pol.Dig.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  10. File list: Pol.ALL.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  11. File list: Pol.CDV.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.CDV.20.RNA_polymerase_II.AllCell hg19 RNA polymerase RNA polymerase II Cardiova...,SRX346933,SRX346936,SRX367018,SRX367016 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.CDV.20.RNA_polymerase_II.AllCell.bed ...

  12. Syndromes associated with Homo sapiens pol II regulatory genes.

    Science.gov (United States)

    Bina, M; Demmon, S; Pares-Matos, E I

    2000-01-01

    The molecular basis of human characteristics is an intriguing but an unresolved problem. Human characteristics cover a broad spectrum, from the obvious to the abstract. Obvious characteristics may include morphological features such as height, shape, and facial form. Abstract characteristics may be hidden in processes that are controlled by hormones and the human brain. In this review we examine exaggerated characteristics presented as syndromes. Specifically, we focus on human genes that encode transcription factors to examine morphological, immunological, and hormonal anomalies that result from deletion, insertion, or mutation of genes that regulate transcription by RNA polymerase II (the Pol II genes). A close analysis of abnormal phenotypes can give clues into how sequence variations in regulatory genes and changes in transcriptional control may give rise to characteristics defined as complex traits.

  13. Mitotic Transcriptional Activation: Clearance of Actively Engaged Pol II via Transcriptional Elongation Control in Mitosis.

    Science.gov (United States)

    Liang, Kaiwei; Woodfin, Ashley R; Slaughter, Brian D; Unruh, Jay R; Box, Andrew C; Rickels, Ryan A; Gao, Xin; Haug, Jeffrey S; Jaspersen, Sue L; Shilatifard, Ali

    2015-11-05

    Although it is established that some general transcription factors are inactivated at mitosis, many details of mitotic transcription inhibition (MTI) and its underlying mechanisms are largely unknown. We have identified mitotic transcriptional activation (MTA) as a key regulatory step to control transcription in mitosis for genes with transcriptionally engaged RNA polymerase II (Pol II) to activate and transcribe until the end of the gene to clear Pol II from mitotic chromatin, followed by global impairment of transcription reinitiation through MTI. Global nascent RNA sequencing and RNA fluorescence in situ hybridization demonstrate the existence of transcriptionally engaged Pol II in early mitosis. Both genetic and chemical inhibition of P-TEFb in mitosis lead to delays in the progression of cell division. Together, our study reveals a mechanism for MTA and MTI whereby transcriptionally engaged Pol II can progress into productive elongation and finish transcription to allow proper cellular division. Copyright © 2015 Elsevier Inc. All rights reserved.

  14. The paralogous salivary anti-complement proteins IRAC I and IRAC II encoded by Ixodes ricinus ticks have broad and complementary inhibitory activities against the complement of different host species.

    Science.gov (United States)

    Schroeder, Hélène; Daix, Virginie; Gillet, Laurent; Renauld, Jean-Christophe; Vanderplasschen, Alain

    2007-02-01

    Several observations suggest that inhibition of the host complement alternative pathway by Ixodes tick saliva is crucial to achieve blood feeding. We recently described two paralogous anti-complement proteins called Ixodes ricinus anti-complement (IRAC) proteins I and II co-expressed in I. ricinus salivary glands. Phylogenetic analyses suggested that these sequences were diversifying by a process of positive Darwinian selection, possibly leading to molecules with different biological properties. In the present study, we tested the hypothesis that each paralogue may have different inhibitory activities against the complement of different natural host species, thereby contributing to broaden the host range of I. ricinus ticks. IRAC I and IRAC II were tested against the complement of eight I. ricinus natural host species (six mammals and two birds). The results demonstrate that IRAC I and IRAC II have broad and complementary inhibition activities against the complement of different host species. This report is the first description of paralogous anti-complement molecules encoded by a pathogen with broad and complementary inhibitory activities against the complement of different host species.

  15. File list: Pol.CeL.50.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  16. File list: Pol.NoD.10.RNA_polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  17. File list: Pol.EmF.05.RNA_Polymerase_II.AllCell [Chip-atlas[Archive

    Lifescience Database Archive (English)

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    Lifescience Database Archive (English)

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  6. File list: Pol.NoD.20.RNA_polymerase_II.AllCell [Chip-atlas[Archive

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  7. Observatorio de Política Internacional II. AMERICAS - Ecuador. Política y fútbol

    OpenAIRE

    Neira Fernández, Enrique

    2007-01-01

    Observatorio de Política Internacional II. AMÉRICAS (Neira Fernández, Enrique) RECIENTES Año 2008 Nicaragua. Un remedo revolucionario Bolivia. ¿Una o dislocada? Paraguay. El ex obispo presidente Perú. El rojo sangre de sendero luminoso Estados Unidos. Panorama tras las elecciones primarias RECIENTES Año 2007 Argentina. Contundente triunfo de Cristina Fernández Bolivia. Nuevos rumbos ¡no más embrollo! Ecuador. Nueva constitución, nuevo rumbo Guatemala....

  8. Promoter2.0: for the recognition of PolII promoter sequences

    DEFF Research Database (Denmark)

    Knudsen, Steen; Knudsen, Steen

    1999-01-01

    Motivation : A new approach to the prediction of eukaryotic PolII promoters from DNA sequence takesadvantage of a combination of elements similar to neural networks and genetic algorithms to recognize a set ofdiscrete subpatterns with variable separation as one pattern: a promoter. The neural...... of optimization, the algorithm was able todiscriminate between vertebrate promoter and non-promoter sequences in a test set with a correlationcoefficient of 0.63. In addition, all five known transcription start sites on the plus strand of the completeadenovirus genome were within 161 bp of 35 predicted...

  9. Observatorio de Política Internacional II. AMERICAS - Elecciones en U.S.A.

    OpenAIRE

    Neira Fernández, Enrique

    2007-01-01

    Observatorio de Política Internacional II. AMÉRICAS (Neira Fernández, Enrique) RECIENTES Año 2008 Nicaragua. Un remedo revolucionario Bolivia. ¿Una o dislocada? Paraguay. El ex obispo presidente Perú. El rojo sangre de sendero luminoso Estados Unidos. Panorama tras las elecciones primarias RECIENTES Año 2007 Argentina. Contundente triunfo de Cristina Fernández Bolivia. Nuevos rumbos ¡no más embrollo! Ecuador. Nueva constitución, nuevo rumbo Guatemala....

  10. RNA Pol II promotes transcription of centromeric satellite DNA in beetles.

    Directory of Open Access Journals (Sweden)

    Zeljka Pezer

    Full Text Available Transcripts of centromeric satellite DNAs are known to play a role in heterochromatin formation as well as in establishment of the kinetochore. However, little is known about basic mechanisms of satellite DNA expression within constitutive heterochromatin and its regulation. Here we present comprehensive analysis of transcription of abundant centromeric satellite DNA, PRAT from beetle Palorus ratzeburgii (Coleoptera. This satellite is characterized by preservation and extreme sequence conservation among evolutionarily distant insect species. PRAT is expressed in all three developmental stages: larvae, pupae and adults at similar level. Transcripts are abundant comprising 0.033% of total RNA and are heterogeneous in size ranging from 0.5 kb up to more than 5 kb. Transcription proceeds from both strands but with 10 fold different expression intensity and transcripts are not processed into siRNAs. Most of the transcripts (80% are not polyadenylated and remain in the nucleus while a small portion is exported to the cytoplasm. Multiple, irregularly distributed transcription initiation sites as well as termination sites have been mapped within the PRAT sequence using primer extension and RLM-RACE. The presence of cap structure as well as poly(A tails in a portion of the transcripts indicate RNA polymerase II-dependent transcription and a putative polymerase II promoter site overlaps the most conserved part of the PRAT sequence. The treatment of larvae with alpha-amanitin decreases the level of PRAT transcripts at concentrations that selectively inhibit pol II activity. In conclusion, stable, RNA polymerase II dependant transcripts of abundant centromeric satellite DNA, not regulated by RNAi, have been identified and characterized. This study offers a basic understanding of expression of highly abundant heterochromatic DNA which in beetle species constitutes up to 50% of the genome.

  11. Characterization of paralogous protein families in rice

    Directory of Open Access Journals (Sweden)

    Zhu Wei

    2008-02-01

    Full Text Available Abstract Background High gene numbers in plant genomes reflect polyploidy and major gene duplication events. Oryza sativa, cultivated rice, is a diploid monocotyledonous species with a ~390 Mb genome that has undergone segmental duplication of a substantial portion of its genome. This, coupled with other genetic events such as tandem duplications, has resulted in a substantial number of its genes, and resulting proteins, occurring in paralogous families. Results Using a computational pipeline that utilizes Pfam and novel protein domains, we characterized paralogous families in rice and compared these with paralogous families in the model dicotyledonous diploid species, Arabidopsis thaliana. Arabidopsis, which has undergone genome duplication as well, has a substantially smaller genome (~120 Mb and gene complement compared to rice. Overall, 53% and 68% of the non-transposable element-related rice and Arabidopsis proteins could be classified into paralogous protein families, respectively. Singleton and paralogous family genes differed substantially in their likelihood of encoding a protein of known or putative function; 26% and 66% of singleton genes compared to 73% and 96% of the paralogous family genes encode a known or putative protein in rice and Arabidopsis, respectively. Furthermore, a major skew in the distribution of specific gene function was observed; a total of 17 Gene Ontology categories in both rice and Arabidopsis were statistically significant in their differential distribution between paralogous family and singleton proteins. In contrast to mammalian organisms, we found that duplicated genes in rice and Arabidopsis tend to have more alternative splice forms. Using data from Massively Parallel Signature Sequencing, we show that a significant portion of the duplicated genes in rice show divergent expression although a correlation between sequence divergence and correlation of expression could be seen in very young genes. Conclusion

  12. Evidence that Mediator is essential for Pol II transcription, but is not a required component of the preinitiation complex in vivo.

    Science.gov (United States)

    Petrenko, Natalia; Jin, Yi; Wong, Koon Ho; Struhl, Kevin

    2017-07-12

    The Mediator complex has been described as a general transcription factor, but it is unclear if it is essential for Pol II transcription and/or is a required component of the preinitiation complex (PIC) in vivo. Here, we show that depletion of individual subunits, even those essential for cell growth, causes a general but only modest decrease in transcription. In contrast, simultaneous depletion of all Mediator modules causes a drastic decrease in transcription. Depletion of head or middle subunits, but not tail subunits, causes a downstream shift in the Pol II occupancy profile, suggesting that Mediator at the core promoter inhibits promoter escape. Interestingly, a functional PIC and Pol II transcription can occur when Mediator is not detected at core promoters. These results provide strong evidence that Mediator is essential for Pol II transcription and stimulates PIC formation, but it is not a required component of the PIC in vivo.

  13. Orthology and paralogy constraints: satisfiability and consistency

    OpenAIRE

    Lafond, Manuel; El-Mabrouk, Nadia

    2014-01-01

    Background A variety of methods based on sequence similarity, reconciliation, synteny or functional characteristics, can be used to infer orthology and paralogy relations between genes of a given gene family   G . But is a given set   C of orthology/paralogy constraints possible, i.e., can they simultaneously co-exist in an evolutionary history for   G ? While previous studies have focused on full sets of constraints, here we consider the general case where   C does not necessarily involve a ...

  14. Orthology and paralogy constraints: satisfiability and consistency.

    Science.gov (United States)

    Lafond, Manuel; El-Mabrouk, Nadia

    2014-01-01

    A variety of methods based on sequence similarity, reconciliation, synteny or functional characteristics, can be used to infer orthology and paralogy relations between genes of a given gene family  G. But is a given set  C of orthology/paralogy constraints possible, i.e., can they simultaneously co-exist in an evolutionary history for  G? While previous studies have focused on full sets of constraints, here we consider the general case where  C does not necessarily involve a constraint for each pair of genes. The problem is subdivided in two parts: (1) Is  C satisfiable, i.e. can we find an event-labeled gene tree G inducing  C? (2) Is there such a G which is consistent, i.e., such that all displayed triplet phylogenies are included in a species tree? Previous results on the Graph sandwich problem can be used to answer to (1), and we provide polynomial-time algorithms for satisfiability and consistency with a given species tree. We also describe a new polynomial-time algorithm for the case of consistency with an unknown species tree and full knowledge of pairwise orthology/paralogy relationships, as well as a branch-and-bound algorithm in the case when unknown relations are present. We show that our algorithms can be used in combination with ProteinOrtho, a sequence similarity-based orthology detection tool, to extract a set of robust orthology/paralogy relationships.

  15. Replication restart in UV-irradiated Escherichia coli involving pols II, III, V, PriA, RecA and RecFOR proteins.

    Science.gov (United States)

    Rangarajan, Savithri; Woodgate, Roger; Goodman, Myron F

    2002-02-01

    In Escherichia coli, UV-irradiated cells resume DNA synthesis after a transient inhibition by a process called replication restart. To elucidate the role of several key proteins involved in this process, we have analysed the time dependence of replication restart in strains carrying a combination of mutations in lexA, recA, polB (pol II), umuDC (pol V), priA, dnaC, recF, recO or recR. We find that both pol II and the origin-independent primosome-assembling function of PriA are essential for the immediate recovery of DNA synthesis after UV irradiation. In their absence, translesion replication or 'replication readthrough' occurs approximately 50 min after UV and is pol V-dependent. In a wild-type, lexA+ background, mutations in recF, recO or recR block both pathways. Similar results were obtained with a lexA(Def) recF strain. However, lexA(Def) recO or lexA(Def) recR strains, although unable to facilitate PriA-pol II-dependent restart, were able to perform pol V-dependent readthrough. The defects in restart attributed to mutations in recF, recO or recR were suppressed in a recA730 lexA(Def) strain expressing constitutively activated RecA (RecA*). Our data suggest that in a wild-type background, RecF, O and R are important for the induction of the SOS response and the formation of RecA*-dependent recombination intermediates necessary for PriA/Pol II-dependent replication restart. In con-trast, only RecF is required for the activation of RecA that leads to the formation of pol V (UmuD'2C) and facilitates replication readthrough.

  16. Pol II promoter prediction using characteristic 4-mer motifs: a machine learning approach

    Directory of Open Access Journals (Sweden)

    Shoyaib Mohammad

    2008-10-01

    Full Text Available Abstract Background Eukaryotic promoter prediction using computational analysis techniques is one of the most difficult jobs in computational genomics that is essential for constructing and understanding genetic regulatory networks. The increased availability of sequence data for various eukaryotic organisms in recent years has necessitated for better tools and techniques for the prediction and analysis of promoters in eukaryotic sequences. Many promoter prediction methods and tools have been developed to date but they have yet to provide acceptable predictive performance. One obvious criteria to improve on current methods is to devise a better system for selecting appropriate features of promoters that distinguish them from non-promoters. Secondly improved performance can be achieved by enhancing the predictive ability of the machine learning algorithms used. Results In this paper, a novel approach is presented in which 128 4-mer motifs in conjunction with a non-linear machine-learning algorithm utilising a Support Vector Machine (SVM are used to distinguish between promoter and non-promoter DNA sequences. By applying this approach to plant, Drosophila, human, mouse and rat sequences, the classification model has showed 7-fold cross-validation percentage accuracies of 83.81%, 94.82%, 91.25%, 90.77% and 82.35% respectively. The high sensitivity and specificity value of 0.86 and 0.90 for plant; 0.96 and 0.92 for Drosophila; 0.88 and 0.92 for human; 0.78 and 0.84 for mouse and 0.82 and 0.80 for rat demonstrate that this technique is less prone to false positive results and exhibits better performance than many other tools. Moreover, this model successfully identifies location of promoter using TATA weight matrix. Conclusion The high sensitivity and specificity indicate that 4-mer frequencies in conjunction with supervised machine-learning methods can be beneficial in the identification of RNA pol II promoters comparative to other methods. This

  17. Los grandes, el poder y la cultura política de la nobleza en el reinado de Carlos II

    Directory of Open Access Journals (Sweden)

    Adolfo CARRASCO MARTÍNEZ

    2009-12-01

    Full Text Available RESUMEN: Este artículo se centra en los comportamientos políticos de la aristocracia española durante el reinado de Carlos II. Se estudian las actitudes colectivas del grupo y la evolución de la cultura política nobiliaria en el contexto de las profundas transformaciones que el ejercicio del poder experimentó en el periodo. Grandes y títulos hubieron de dar respuesta a la sucesión de escenarios políticos y, al mismo tiempo, influyeron decisivamente en la marcha de los asuntos. El progresivo deterioro de la autoridad regia determinó el paso a una poliarquía, a un modelo de múltiples centros de poder de equilibrios precarios que reflejaba el debate sobre el absolutismo y la participación política de la alta nobleza. Factores externos, como la cuestión sucesoria y la injerencia de las potencias extranjeras, y factores internos, como la incapacidad nobiliaria de cohesionarse en un proyecto común, la esperanza en liderazgos imposibles y las limitaciones de su cultura política, produjeron la rápida degeneración de la poliarquía en un régimen caótico en el crepúsculo del siglo XVII.ABSTRACT: This paper is focused on the political behaviour of the Spanish aristocracy under the reign of Charles II. It examines the group's general attitudes and the evolution of the noble political consciousness in a context where the exercise of power underwent deep changes. Grandees and titles had to react towards the series of political scenes and at the same time, they decisively had an influence over the course of events. The progressive impairment of the royal authority gave place to a polyarchy, a model of manifold control centres of precarious balance, which reflected the debate between the absolutism and the upper nobility's political concern. External factors, such as successory matters and foreign countries interference, and internal factors, like the noble inability to integrate themselves into a common project, the expectation around

  18. El proyecto neoliberal del rey Abdallah II. para Jordania: zonas francas y política exterior

    OpenAIRE

    Rodríguez Mojica, Erika Liliana

    2016-01-01

    Esta monografía busca explicar los intereses y resultados parciales obtenidos por la monarquía del Reino Hachemí de Jordania en el proyecto neoliberal de apertura económica y creación de zonas francas bajo el gobierno de Abdallah II., especialmente la región fronteriza de Al-Karameh y la relación bilateral con Irak, como parte de su política económica nacional e internacional. Para el análisis se utilizarán dos teorías de Relaciones Internacionales; la teoría de interdependencia compleja de R...

  19. Paralog-divergent Features May Help Reduce Off-target Effects of Drugs: Hints from Glucagon Subfamily Analysis

    Directory of Open Access Journals (Sweden)

    Zhining Sa

    2017-08-01

    Full Text Available Side effects from targeted drugs remain a serious concern. One reason is the nonselective binding of a drug to unintended proteins such as its paralogs, which are highly homologous in sequences and have similar structures and drug-binding pockets. To identify targetable differences between paralogs, we analyzed two types (type-I and type-II of functional divergence between two paralogs in the known target protein receptor family G-protein coupled receptors (GPCRs at the amino acid level. Paralogous protein receptors in glucagon-like subfamily, glucagon receptor (GCGR and glucagon-like peptide-1 receptor (GLP-1R, exhibit divergence in ligands and are clinically validated drug targets for type 2 diabetes. Our data showed that type-II amino acids were significantly enriched in the binding sites of antagonist MK-0893 to GCGR, which had a radical shift in physicochemical properties between GCGR and GLP-1R. We also examined the role of type-I amino acids between GCGR and GLP-1R. The divergent features between GCGR and GLP-1R paralogs may be helpful in their discrimination, thus enabling the identification of binding sites to reduce undesirable side effects and increase the target specificity of drugs.

  20. Arabidopsis Pol II-Dependent in Vitro Transcription System Reveals Role of Chromatin for Light-Inducible rbcS Gene Transcription1

    Science.gov (United States)

    Ido, Ayaka; Iwata, Shinya; Iwata, Yuka; Igarashi, Hisako; Hamada, Takahiro; Sonobe, Seiji; Sugiura, Masahiro; Yukawa, Yasushi

    2016-01-01

    In vitro transcription is an essential tool to study the molecular mechanisms of transcription. For over a decade, we have developed an in vitro transcription system from tobacco (Nicotiana tabacum)-cultured cells (BY-2), and this system supported the basic activities of the three RNA polymerases (Pol I, Pol II, and Pol III). However, it was not suitable to study photosynthetic genes, because BY-2 cells have lost their photosynthetic activity. Therefore, Arabidopsis (Arabidopsis thaliana) in vitro transcription systems were developed from green and etiolated suspension cells. Sufficient in vitro Pol II activity was detected after the minor modification of the nuclear soluble extracts preparation method; removal of vacuoles from protoplasts and L-ascorbic acid supplementation in the extraction buffer were particularly effective. Surprisingly, all four Arabidopsis Rubisco small subunit (rbcS-1A, rbcS-1B, rbcS-2B, and rbcS-3B) gene members were in vitro transcribed from the naked DNA templates without any light-dependent manner. However, clear light-inducible transcriptions were observed using chromatin template of rbcS-1A gene, which was prepared with a human nucleosome assembly protein 1 (hNAP1) and HeLa histones. This suggested that a key determinant of light-dependency through the rbcS gene transcription was a higher order of DNA structure (i.e. chromatin). PMID:26662274

  1. DNA damage regulates alternative splicing through changes in POL II elongation

    International Nuclear Information System (INIS)

    Munoz, M.J.; Perez Santangelo, M.S.; De la Mata, M.; Kornblihtt, A.R.

    2008-01-01

    Many apoptotic genes are regulated via alternative splicing (AS) but little is known about the mechanisms controlling AS in stress situations derived from DNA damage. Here we show that ultraviolet (UV) radiation affects co-transcriptional, but not post transcriptional, AS through a systemic mechanism involving a CDK-9-dependent hyper phosphorylation of RNA polymerase II carboxy terminal domain (CTD) and a subsequent and unprecedented inhibition of transcriptional elongation, estimated in vivo and in real time by FRAP. To mimic this hyper phosphorylation we used CTD mutants with serines 2 or 5 substituted by glutamic acids and found that they not only display lower elongation rates but duplicate the effects of UV light on AS in the absence of irradiation. Consistently, substitution of the serines with alanines prevents the UV effect on splicing. These results represent the first in vivo proof of modulation of elongation in response to an environmental signal, affecting in turn the kinetic coupling between transcription and splicing. (authors)

  2. The SOS and RpoS Regulons Contribute to Bacterial Cell Robustness to Genotoxic Stress by Synergistically Regulating DNA Polymerase Pol II.

    Science.gov (United States)

    Dapa, Tanja; Fleurier, Sébastien; Bredeche, Marie-Florence; Matic, Ivan

    2017-07-01

    Mitomycin C (MMC) is a genotoxic agent that induces DNA cross-links, DNA alkylation, and the production of reactive oxygen species (ROS). MMC induces the SOS response and RpoS regulons in Escherichia coli SOS-encoded functions are required for DNA repair, whereas the RpoS regulon is typically induced by metabolic stresses that slow growth. Thus, induction of the RpoS regulon by MMC may be coincidental, because DNA damage slows growth; alternatively, the RpoS regulon may be an adaptive response contributing to cell survival. In this study, we show that the RpoS regulon is primarily induced by MMC-induced ROS production. We also show that RpoS regulon induction is required for the survival of MMC-treated growing cells. The major contributor to RpoS-dependent resistance to MMC treatment is DNA polymerase Pol II, which is encoded by the polB gene belonging to the SOS regulon. The observation that polB gene expression is controlled by the two major stress response regulons that are required to maximize survival and fitness further emphasizes the key role of this DNA polymerase as an important factor in genome stability. Copyright © 2017 by the Genetics Society of America.

  3. Function of Rad51 paralogs in eukaryotic homologous recombinational repair

    International Nuclear Information System (INIS)

    Liu, N.; Skowronek, K.

    2003-01-01

    Full text: Homologous recombinational repair (HRR) is an important mechanism for maintaining genetic integrity and cancer prevention by accurately repair of DNA double strand breaks induced by environmental insults or occurred in DNA replication. A critical step in HRR is the polymerization of Rad51 on single stranded DNA to form nuclear protein filaments, the later conduct DNA strand paring and exchange between homologous strands. A number of proteins, including replication protein A (RPA), Rad52 and Rad51 paralogs, are suggested to modulate or facilitate the process of Rad51 filament formation. Five Rad51 paralogs, namely XRCC2, XRCC3, Rad51B, Rad51C and Rad51D have been identified in eucaryotic cells. These proteins show distant protein sequence identity to Rad51, to yeast Rad51 paralogs (Rad55 and Rad57) and to each other. Hamster or chicken mutants of Rad51 paralogs exhibit hypersensitivity to a variety of DNA damaging agents, especially cross-linking agents, and are defective in assembly of Rad51 onto HRR site after DNA damage. Recent data from our and other labs showed that Rad51 paralogs constitute two distinct complexes in cell extracts, one contains XRCC2, Rad51B, Rad51C and Rad51D, and the other contains Rad51C and XRCC3. Rad51C is involved in both complexes. Our results also showed that XRCC3-Rad51C complex interacts with Rad51 in vivo. Furthermore, overexpression of Rad52 can partially suppress the hypersensitivity of XRCC2 mutant irs1 to ionizing radiation and corrected the defects in Rad51 focus formation. These results suggest that XRCC2 and other Rad51 paralogs play a mediator function to Rad51 in the early stage of HRR

  4. Autoridades locales y partidos políticos en Andalucía durante la II República

    Directory of Open Access Journals (Sweden)

    OCTAVIO RUIZ MANJÓN

    1979-01-01

    Full Text Available Se presenta una tentativa de análisis del comportamiento de los gobernadores provinciales andaluces en su relación con las organizaciones políticas locales entre los años 1931 y 1936. Se establecen vínculos entre tales comportamientos y la sucesión de eventos políticos nacionales y locales. Para ello se emplea la información disponible en la Gaceta de Madrid (el órgano oficial español de la administración pública, así como recortes de la prensa local procedente de las ochos provincias andaluzas. Se analiza la estabilidad de los gobiernos en el ejercicio de sus responsabilidades mediante la comparación del promedio general presentado por cada provincia. Se comparan las fluctuaciones entre los porcentajes con las fluctuaciones generales que tienen lugar en la vida política en cada período considerado. Se concluye que la vida política local, su estructura organizativa y los sucesos que en ella acaecen tienen escasa influencia en la elección y estabilidad de los gobernantes.

  5. Gene conversion homogenizes the CMT1A paralogous repeats

    Directory of Open Access Journals (Sweden)

    Hurles Matthew E

    2001-12-01

    Full Text Available Abstract Background Non-allelic homologous recombination between paralogous repeats is increasingly being recognized as a major mechanism causing both pathogenic microdeletions and duplications, and structural polymorphism in the human genome. It has recently been shown empirically that gene conversion can homogenize such repeats, resulting in longer stretches of absolute identity that may increase the rate of non-allelic homologous recombination. Results Here, a statistical test to detect gene conversion between pairs of non-coding sequences is presented. It is shown that the 24 kb Charcot-Marie-Tooth type 1A paralogous repeats (CMT1A-REPs exhibit the imprint of gene conversion processes whilst control orthologous sequences do not. In addition, Monte Carlo simulations of the evolutionary divergence of the CMT1A-REPs, incorporating two alternative models for gene conversion, generate repeats that are statistically indistinguishable from the observed repeats. Bounds are placed on the rate of these conversion processes, with central values of 1.3 × 10-4 and 5.1 × 10-5 per generation for the alternative models. Conclusions This evidence presented here suggests that gene conversion may have played an important role in the evolution of the CMT1A-REP paralogous repeats. The rates of these processes are such that it is probable that homogenized CMT1A-REPs are polymorphic within modern populations. Gene conversion processes are similarly likely to play an important role in the evolution of other segmental duplications and may influence the rate of non-allelic homologous recombination between them.

  6. Roquin Paralogs Differentially Regulate Functional NKT Cell Subsets.

    Science.gov (United States)

    Drees, Christoph; Vahl, J Christoph; Bortoluzzi, Sabrina; Heger, Klaus D; Fischer, Julius C; Wunderlich, F Thomas; Peschel, Christian; Schmidt-Supprian, Marc

    2017-04-01

    NKT cells represent a small subset of glycolipid-recognizing T cells that are heavily implicated in human allergic, autoimmune, and malignant diseases. In the thymus, precursor cells recognize self-glycolipids by virtue of their semi-invariant TCR, which triggers NKT cell lineage commitment and maturation. During their development, NKT cells are polarized into the NKT1, NKT2, and NKT17 subsets, defined through their cytokine-secretion patterns and the expression of key transcription factors. However, we have largely ignored how the differentiation into the NKT cell subsets is regulated. In this article, we describe the mRNA-binding Roquin-1 and -2 proteins as central regulators of murine NKT cell fate decisions. In the thymus, T cell-specific ablation of the Roquin paralogs leads to a dramatic expansion of NKT17 cells, whereas peripheral mature NKT cells are essentially absent. Roquin-1/2-deficient NKT17 cells show exaggerated lineage-specific expression of nearly all NKT17-defining proteins tested. We show through mixed bone marrow chimera experiments that NKT17 polarization is mediated through cell-intrinsic mechanisms early during NKT cell development. In contrast, the loss of peripheral NKT cells is due to cell-extrinsic factors. Surprisingly, Roquin paralog-deficient NKT cells are, in striking contrast to conventional T cells, compromised in their ability to secrete cytokines. Altogether, we show that Roquin paralogs regulate the development and function of NKT cell subsets in the thymus and periphery. Copyright © 2017 by The American Association of Immunologists, Inc.

  7. Global gene expression analysis of fission yeast mutants impaired in Ser-2 phosphorylation of the RNA pol II carboxy terminal domain.

    Directory of Open Access Journals (Sweden)

    Reza Saberianfar

    Full Text Available In Schizosaccharomyces pombe the nuclear-localized Lsk1p-Lsc1p cyclin dependent kinase complex promotes Ser-2 phosphorylation of the heptad repeats found within the RNA pol II carboxy terminal domain (CTD. Here, we first provide evidence supporting the existence of a third previously uncharacterized Ser-2 CTD kinase subunit, Lsg1p. As expected for a component of the complex, Lsg1p localizes to the nucleus, promotes Ser-2 phosphorylation of the CTD, and physically interacts with both Lsk1p and Lsc1p in vivo. Interestingly, we also demonstrate that lsg1Δ mutants--just like lsk1Δ and lsc1Δ strains--are compromised in their ability to faithfully and reliably complete cytokinesis. Next, to address whether kinase mediated alterations in CTD phosphorylation might selectively alter the expression of genes with roles in cytokinesis and/or the cytoskeleton, global gene expression profiles were analyzed. Mutants impaired in Ser-2 phosphorylation display little change with respect to the level of transcription of most genes. However, genes affecting cytokinesis--including the actin interacting protein gene, aip1--as well as genes with roles in meiosis, are included in a small subset that are differentially regulated. Significantly, genetic analysis of lsk1Δ aip1Δ double mutants is consistent with Lsk1p and Aip1p acting in a linear pathway with respect to the regulation of cytokinesis.

  8. Purifying selection acts on coding and non-coding sequences of paralogous genes in Arabidopsis thaliana.

    Science.gov (United States)

    Hoffmann, Robert D; Palmgren, Michael

    2016-06-13

    Whole-genome duplications in the ancestors of many diverse species provided the genetic material for evolutionary novelty. Several models explain the retention of paralogous genes. However, how these models are reflected in the evolution of coding and non-coding sequences of paralogous genes is unknown. Here, we analyzed the coding and non-coding sequences of paralogous genes in Arabidopsis thaliana and compared these sequences with those of orthologous genes in Arabidopsis lyrata. Paralogs with lower expression than their duplicate had more nonsynonymous substitutions, were more likely to fractionate, and exhibited less similar expression patterns with their orthologs in the other species. Also, lower-expressed genes had greater tissue specificity. Orthologous conserved non-coding sequences in the promoters, introns, and 3' untranslated regions were less abundant at lower-expressed genes compared to their higher-expressed paralogs. A gene ontology (GO) term enrichment analysis showed that paralogs with similar expression levels were enriched in GO terms related to ribosomes, whereas paralogs with different expression levels were enriched in terms associated with stress responses. Loss of conserved non-coding sequences in one gene of a paralogous gene pair correlates with reduced expression levels that are more tissue specific. Together with increased mutation rates in the coding sequences, this suggests that similar forces of purifying selection act on coding and non-coding sequences. We propose that coding and non-coding sequences evolve concurrently following gene duplication.

  9. Live-cell Imaging of Pol II Promoter Activity to Monitor Gene expression with RNA IMAGEtag reporters

    Energy Technology Data Exchange (ETDEWEB)

    Shin, Ilchung [Ames Laboratory; Ray, Judhajeet [Ames Laboratory; Gupta, Vinayak [Iowa State University; Ilgu, Muslum [Ames Laboratory; Beasley, Jonathan [Iowa State University; Bendickson, Lee [Ames Laboratory; Mehanovic, Samir [Molecular Express; Kraus, George A. [Iowa State University; Nilsen-Hamilton, Marit [Ames Laboratory

    2014-04-20

    We describe a ribonucleic acid (RNA) reporter system for live-cell imaging of gene expression to detect changes in polymerase II activity on individual promoters in individual cells. The reporters use strings of RNA aptamers that constitute IMAGEtags (Intracellular MultiAptamer GEnetic tags) that can be expressed from a promoter of choice. For imaging, the cells are incubated with their ligands that are separately conjugated with one of the FRET pair, Cy3 and Cy5. The IMAGEtags were expressed in yeast from the GAL1, ADH1 or ACT1 promoters. Transcription from all three promoters was imaged in live cells and transcriptional increases from the GAL1 promoter were observed with time after adding galactose. Expression of the IMAGEtags did not affect cell proliferation or endogenous gene expression. Advantages of this method are that no foreign proteins are produced in the cells that could be toxic or otherwise influence the cellular response as they accumulate, the IMAGEtags are short lived and oxygen is not required to generate their signals. The IMAGEtag RNA reporter system provides a means of tracking changes in transcriptional activity in live cells and in real time.

  10. Differential paralog divergence modulates genome evolution across yeast species.

    Directory of Open Access Journals (Sweden)

    Monica R Sanchez

    2017-02-01

    Full Text Available Evolutionary outcomes depend not only on the selective forces acting upon a species, but also on the genetic background. However, large timescales and uncertain historical selection pressures can make it difficult to discern such important background differences between species. Experimental evolution is one tool to compare evolutionary potential of known genotypes in a controlled environment. Here we utilized a highly reproducible evolutionary adaptation in Saccharomyces cerevisiae to investigate whether experimental evolution of other yeast species would select for similar adaptive mutations. We evolved populations of S. cerevisiae, S. paradoxus, S. mikatae, S. uvarum, and interspecific hybrids between S. uvarum and S. cerevisiae for ~200-500 generations in sulfate-limited continuous culture. Wild-type S. cerevisiae cultures invariably amplify the high affinity sulfate transporter gene, SUL1. However, while amplification of the SUL1 locus was detected in S. paradoxus and S. mikatae populations, S. uvarum cultures instead selected for amplification of the paralog, SUL2. We measured the relative fitness of strains bearing deletions and amplifications of both SUL genes from different species, confirming that, converse to S. cerevisiae, S. uvarum SUL2 contributes more to fitness in sulfate limitation than S. uvarum SUL1. By measuring the fitness and gene expression of chimeric promoter-ORF constructs, we were able to delineate the cause of this differential fitness effect primarily to the promoter of S. uvarum SUL1. Our data show evidence of differential sub-functionalization among the sulfate transporters across Saccharomyces species through recent changes in noncoding sequence. Furthermore, these results show a clear example of how such background differences due to paralog divergence can drive changes in genome evolution.

  11. The impact of paralogy on phylogenomic studies - a case study on annelid relationships.

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    Torsten H Struck

    Full Text Available Phylogenomic studies based on hundreds of genes derived from expressed sequence tags libraries are increasingly used to reveal the phylogeny of taxa. A prerequisite for these studies is the assignment of genes into clusters of orthologous sequences. Sophisticated methods of orthology prediction are used in such analyses, but it is rarely assessed whether paralogous sequences have been erroneously grouped together as orthologous sequences after the prediction, and whether this had an impact on the phylogenetic reconstruction using a super-matrix approach. Herein, I tested the impact of paralogous sequences on the reconstruction of annelid relationships based on phylogenomic datasets. Using single-partition analyses, screening for bootstrap support, blast searches and pruning of sequences in the supermatrix, wrongly assigned paralogous sequences were found in eight partitions and the placement of five taxa (the annelids Owenia, Scoloplos, Sthenelais and Eurythoe and the nemertean Cerebratulus including the robust bootstrap support could be attributed to the presence of paralogous sequences in two partitions. Excluding these sequences resulted in a different, weaker supported placement for these taxa. Moreover, the analyses revealed that paralogous sequences impacted the reconstruction when only a single taxon represented a previously supported higher taxon such as a polychaete family. One possibility of a priori detection of wrongly assigned paralogous sequences could combine 1 a screening of single-partition analyses based on criteria such as nodal support or internal branch length with 2 blast searches of suspicious cases as presented herein. Also possible are a posteriori approaches in which support for specific clades is investigated by comparing alternative hypotheses based on differences in per-site likelihoods. Increasing the sizes of EST libraries will also decrease the likelihood of wrongly assigned paralogous sequences, and in the case

  12. The Creatine Transporter Gene Paralogous at 16p11.2 Is Expressed in Human Brain

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    Nadia Bayou

    2008-01-01

    We report on the clinical, cytogenetic, and molecular findings in a boy with autism carrying a de novo translocation t(7;16(p22.1;p11.2. The chromosome 16 breakpoint disrupts the paralogous SLC6A8 gene also called SLC6A10 or CT2. Predicted translation of exons and RT-PCR analysis reveal specific expression of the creatine transporter paralogous in testis and brain. Several studies reported on the role of X-linked creatine transporter mutations in individuals with mental retardation, with or without autism. The existence of disruption in SLC6A8 paralogous gene associated with idiopathic autism suggests that this gene may be involved in the autistic phenotype in our patient.

  13. Paralogous Genes as a Tool to Study the Regulation of Gene Expression

    DEFF Research Database (Denmark)

    Hoffmann, Robert D

    The genomes of plants are marked by reoccurring events of whole-genome duplication. These events are major contributors to speciation and provide the genetic material for organisms to evolve ever greater complexity. Duplicated genes, referred to as paralogs, may be retained because they acquired...... regions. These results suggest that a concurrent purifying selection acts on coding and non-coding sequences of paralogous genes in A. thaliana. Mutational analyses of the promoters from a paralogous gene pair were performed in transgenic A. thaliana plants. The results revealed a 170-bp long DNA sequence...... that forms a bifunctional cis-regulatory module; it represses gene expression in the sporophyte while activating it in pollen. This finding is important for many aspects of gene regulation and the transcriptional changes underlying gametophyte development. In conclusion, the presented thesis suggests that...

  14. Investigating the effect of paralogs on microarray gene-set analysis

    LENUS (Irish Health Repository)

    Faure, Andre J

    2011-01-24

    Abstract Background In order to interpret the results obtained from a microarray experiment, researchers often shift focus from analysis of individual differentially expressed genes to analyses of sets of genes. These gene-set analysis (GSA) methods use previously accumulated biological knowledge to group genes into sets and then aim to rank these gene sets in a way that reflects their relative importance in the experimental situation in question. We suspect that the presence of paralogs affects the ability of GSA methods to accurately identify the most important sets of genes for subsequent research. Results We show that paralogs, which typically have high sequence identity and similar molecular functions, also exhibit high correlation in their expression patterns. We investigate this correlation as a potential confounding factor common to current GSA methods using Indygene http:\\/\\/www.cbio.uct.ac.za\\/indygene, a web tool that reduces a supplied list of genes so that it includes no pairwise paralogy relationships above a specified sequence similarity threshold. We use the tool to reanalyse previously published microarray datasets and determine the potential utility of accounting for the presence of paralogs. Conclusions The Indygene tool efficiently removes paralogy relationships from a given dataset and we found that such a reduction, performed prior to GSA, has the ability to generate significantly different results that often represent novel and plausible biological hypotheses. This was demonstrated for three different GSA approaches when applied to the reanalysis of previously published microarray datasets and suggests that the redundancy and non-independence of paralogs is an important consideration when dealing with GSA methodologies.

  15. Molecular cytogenetic differentiation of paralogs of Hox paralogs in duplicated and re-diploidized genome of the North American paddlefish (Polyodon spathula)

    Czech Academy of Sciences Publication Activity Database

    Symonová, Radka; Havelka, M.; Amemiya, C. T.; Howell, M. W.; Kořínková, Tereza; Flajšhans, M.; Gela, D.; Ráb, Petr

    2017-01-01

    Roč. 18, č. 1 (2017), č. článku 19. ISSN 1471-2156 R&D Projects: GA ČR GA14-02940S; GA MŠk EF15_003/0000460 Institutional support: RVO:67985904 Keywords : hoxA/D paralogs mapping * sturgeon whole genome duplication * ancient fish genome * rediploidization Subject RIV: EB - Genetics ; Molecular Biology OBOR OECD: Genetics and heredity (medical genetics to be 3) Impact factor: 2.266, year: 2016

  16. A paralog of the proteinaceous elicitor sm1 affects colonization of maize roots by Trichoderma virens

    Science.gov (United States)

    The biocontrol agent, Trichoderma virens, has the ability to protect plants from pathogens by eliciting plant defense responses, involvement in mycoparasitism, or secreting antagonistic secondary metabolites. SM1, an elicitor of induced systemic resistance (ISR), was found to have three paralogs wi...

  17. Identifying pathogenicity of human variants via paralog-based yeast complementation.

    Directory of Open Access Journals (Sweden)

    Fan Yang

    2017-05-01

    Full Text Available To better understand the health implications of personal genomes, we now face a largely unmet challenge to identify functional variants within disease-associated genes. Functional variants can be identified by trans-species complementation, e.g., by failure to rescue a yeast strain bearing a mutation in an orthologous human gene. Although orthologous complementation assays are powerful predictors of pathogenic variation, they are available for only a few percent of human disease genes. Here we systematically examine the question of whether complementation assays based on paralogy relationships can expand the number of human disease genes with functional variant detection assays. We tested over 1,000 paralogous human-yeast gene pairs for complementation, yielding 34 complementation relationships, of which 33 (97% were novel. We found that paralog-based assays identified disease variants with success on par with that of orthology-based assays. Combining all homology-based assay results, we found that complementation can often identify pathogenic variants outside the homologous sequence region, presumably because of global effects on protein folding or stability. Within our search space, paralogy-based complementation more than doubled the number of human disease genes with a yeast-based complementation assay for disease variation.

  18. A Theory of Utility Conditionals: Paralogical Reasoning from Decision-Theoretic Leakage

    Science.gov (United States)

    Bonnefon, Jean-Francois

    2009-01-01

    Many "if p, then q" conditionals have decision-theoretic features, such as antecedents or consequents that relate to the utility functions of various agents. These decision-theoretic features leak into reasoning processes, resulting in various paralogical conclusions. The theory of utility conditionals offers a unified account of the various forms…

  19. Novel male-biased expression in paralogs of the aphid slimfast nutrient amino acid transporter expansion

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    Nathanson Lubov

    2011-09-01

    Full Text Available Abstract Background A major goal of molecular evolutionary biology is to understand the fate and consequences of duplicated genes. In this context, aphids are intriguing because the newly sequenced pea aphid genome harbors an extraordinary number of lineage-specific gene duplications relative to other insect genomes. Though many of their duplicated genes may be involved in their complex life cycle, duplications in nutrient amino acid transporters appear to be associated rather with their essential amino acid poor diet and the intracellular symbiosis aphids rely on to compensate for dietary deficits. Past work has shown that some duplicated amino acid transporters are highly expressed in the specialized cells housing the symbionts, including a paralog of an aphid-specific expansion homologous to the Drosophila gene slimfast. Previous data provide evidence that these bacteriocyte-expressed transporters mediate amino acid exchange between aphids and their symbionts. Results We report that some nutrient amino acid transporters show male-biased expression. Male-biased expression characterizes three paralogs in the aphid-specific slimfast expansion, and the male-biased expression is conserved across two aphid species for at least two paralogs. One of the male-biased paralogs has additionally experienced an accelerated rate of non-synonymous substitutions. Conclusions This is the first study to document male-biased slimfast expression. Our data suggest that the male-biased aphid slimfast paralogs diverged from their ancestral function to fill a functional role in males. Furthermore, our results provide evidence that members of the slimfast expansion are maintained in the aphid genome not only for the previously hypothesized role in mediating amino acid exchange between the symbiotic partners, but also for sex-specific roles.

  20. La cultura política del ciudadano y la comunicación política en TV en la transición política del plebiscito chileno (octubre 1988. I. Metodología. II. Conclusiones

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    JOSÉ LUIS PIÑUEL RAIGADA

    1990-01-01

    Full Text Available Exposición de la acotación material y formal del objeto al que se destina la investigación realizada, y cuyo campo de observación es la situación histórica brindada con la campaña política del plebiscito chileno del 5 de octubre de 1988. La prefiguración teórica de este objeto es la responsable de la selección y consistencia de los datos que se han recolectado y procesado, y la que ha motivado a escoger como campo de observación la COMUNICACIÓN POLÍTICA televisiva y la CULTURA POLÍTICA del ciudadano en el Chile Plebiscitario. De la investigación se concluye que la Mediación comunicativa del Plebiscito ha implantado en la Transición chilena un proceso de resignificación cuyo sentido radica más en la "afirmación del cambio" que en la "afirmación de opciones contra", curiosamente ligadas estas últimas, por la vía de la comunicación, a la opción política cuya práctica no era de cambio, sino de continuidad.

  1. Two Paralogous Families of a Two-Gene Subtilisin Operon Are Widely Distributed in Oral Treponemes

    Science.gov (United States)

    Correia, Frederick F.; Plummer, Alvin R.; Ellen, Richard P.; Wyss, Chris; Boches, Susan K.; Galvin, Jamie L.; Paster, Bruce J.; Dewhirst, Floyd E.

    2003-01-01

    Certain oral treponemes express a highly proteolytic phenotype and have been associated with periodontal diseases. The periodontal pathogen Treponema denticola produces dentilisin, a serine protease of the subtilisin family. The two-gene operon prcA-prtP is required for expression of active dentilisin (PrtP), a putative lipoprotein attached to the treponeme's outer membrane or sheath. The purpose of this study was to examine the diversity and structure of treponemal subtilisin-like proteases in order to better understand their distribution and function. The complete sequences of five prcA-prtP operons were determined for Treponema lecithinolyticum, “Treponema vincentii,” and two canine species. Partial operon sequences were obtained for T. socranskii subsp. 04 as well as 450- to 1,000-base fragments of prtP genes from four additional treponeme strains. Phylogenetic analysis demonstrated that the sequences fall into two paralogous families. The first family includes the sequence from T. denticola. Treponemes possessing this operon family express chymotrypsin-like protease activity and can cleave the substrate N-succinyl-alanyl-alanyl-prolyl-phenylalanine-p-nitroanilide (SAAPFNA). Treponemes possessing the second paralog family do not possess chymotrypsin-like activity or cleave SAAPFNA. Despite examination of a range of protein and peptide substrates, the specificity of the second protease family remains unknown. Each of the fully sequenced prcA and prtP genes contains a 5′ hydrophobic leader sequence with a treponeme lipobox. The two paralogous families of treponeme subtilisins represent a new subgroup within the subtilisin family of proteases and are the only subtilisin lipoprotein family. The present study demonstrated that the subtilisin paralogs comprising a two-gene operon are widely distributed among treponemes. PMID:14617650

  2. Interaction of fish aryl hydrocarbon receptor paralogs (AHR1 and AHR2) with the retinoblastoma protein

    Energy Technology Data Exchange (ETDEWEB)

    Merson, Rebeka R., E-mail: rmerson@ric.edu [Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543 (United States); Biology Department, Rhode Island College, 500 Mt. Pleasant Ave., Providence, RI 02908 (United States); Karchner, Sibel I.; Hahn, Mark E. [Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543 (United States)

    2009-08-13

    The aryl hydrocarbon receptor (AHR) mediates the toxic effects of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and related compounds. In some mammalian cell lines, TCDD induces G1 cell cycle arrest, which depends on an interaction between the AHR and the retinoblastoma tumor suppressor (RB). Mammals possess one AHR, whereas fishes possess two or more AHR paralogs that differ in the domains important for AHR-RB interactions in mammals. To test the hypothesis that fish AHR paralogs differ in their ability to interact with RB, we cloned RB cDNA from Atlantic killifish, Fundulus heteroclitus, and studied the interactions of killifish RB protein with killifish AHR1 and AHR2. In coimmunoprecipitation experiments, in vitro-expressed killifish RB coprecipitated with both AHR1 and AHR2. Consistent with these results, both killifish AHR1 and AHR2 interacted with RB in mammalian two-hybrid assays. These results suggest that both fish AHR1 and AHR2 paralogs may have the potential to influence cell proliferation through interactions with RB.

  3. Roles of ATR1 paralogs YMR279c and YOR378w in boron stress tolerance

    International Nuclear Information System (INIS)

    Bozdag, Gonensin Ozan; Uluisik, Irem; Gulculer, Gulce Sila; Karakaya, Huseyin C.; Koc, Ahmet

    2011-01-01

    Highlights: → ATR1 paralog YMR279c plays role in boron detoxification. → YMR279c overexpression lowers cytoplasmic boron levels. → ATR1 paralog YOR378w has no roles in boron stress response. -- Abstract: Boron is a necessary nutrient for plants and animals, however excess of it causes toxicity. Previously, Atr1 and Arabidopsis Bor1 homolog were identified as the boron efflux pump in yeast, which lower the cytosolic boron concentration and help cells to survive in the presence of toxic amount of boron. In this study, we analyzed ATR1 paralogs, YMR279c and YOR378w, to understand whether they participate in boron stress tolerance in yeast. Even though these genes share homology with ATR1, neither their deletion rendered cells boron sensitive nor their expression was significantly upregulated by boron treatment. However, expression of YMR279, but not YOR378w, from the constitutive GAPDH promoter on a high copy plasmid provided remarkable boron resistance by decreasing intracellular boron levels. Thus our results suggest the presence of a third boron exporter, YMR279c, which functions similar to ATR1 and provides boron resistance in yeast.

  4. Principais políticas de fomento do turismo na Amazônia: análise dos primeiros planos de turismo da Amazônia (PTA I e II e do PROECOTUR

    Directory of Open Access Journals (Sweden)

    Kassia Suelen da Silva Farias

    2015-01-01

    Full Text Available Verifica-se que o turismo tem passado por inúmeras transformações no que concerne ao planejamento e gestão da atividade. Observa-se que desde a década de 1970 tem-se pensado em diferentes modelos de desenvolvimento de turismo para a Amazônia, almejando o progresso econômico e social. Neste processo, na década de 1970, a Superintendência de Desenvolvimento da Amazônia (SUDAM, deu inicio a discursão de criação do primeiro Plano de Turismo da Amazônia (PTA que deu inicio na década de 1980 até 1985. A partir da década de 1990 as estratégias de turismo para a região foram desenvolvidas em conformidade com a preocupação mundial em torno da natureza e do homem. Produto deste contexto, o II PTA foi lançado com o objetivo principal de desenvolver medidas que conciliassem o desenvolvimento econômico às questões ambientais e sociais. Outra ação também importante para esse período foi a promoção do desenvolvimento regional por meio de polos de turismo integrados, conforme determinava o PROECOTUR. O objetivo deste artigo, portanto, consiste em destacar as primeiras políticas públicas de turismo para o desenvolvimento dos estados e municípios da Amazônia que deram inicio a partir de 1970. Para isso, a estruturação conceitual do trabalho fundamentou-se em políticas públicas e planejamento de turismo na Amazônia. Utiliza-se como metodologia a pesquisa documental, por meio de diagnóstico que enfatiza os principais resultados obtidos pelos I e II Planos de Turismo da Amazônia, a partir da interpretação e análise documental; O artigo também adota a pesquisa bibliográfica, pois analisa as principais estratégias de desenvolvimento do turismo na Amazônia. A partir de tal análise, conclui-se que as mudanças políticas de turismo ocorridas na Amazônia entre a década de 1970 e 1990 - apesar de estarem acompanhadas por ações de planejamento do governo nacional e até mesmo pelas tendências mundiais - n

  5. Síntese, caracterização e estudo das propriedades magnéticas de um polímero de coordenação contendo cobalto(II e cobre(II

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    Tamyris T. da Cunha

    2012-01-01

    Full Text Available This work describes the synthesis and characterization of two new compounds with ligand opy (N-(2-pyridyloxamate: the copper(II precursor [Me4N]2[Cu(opy2].5H2O and CoII CuII coordination polymer {[CoCu(opy2]}n×4nH2O. This latter compound was obtained by reaction of [Me4N]2[Cu(opy2].5H2O and CoCl2.6H2O in water. The heterobimetallic CoII CuII chain was characterized by elemental analysis, IR spectroscopy, thermogravimetry and magnetic measurements. Magnetic characterization revealed typical behavior of one-dimensional (1D ferrimagnetic chain as shown in the curves of temperature (T dependence of magnetic susceptibility (χM, in the form of χMT versus T, and dependence of magnetization (M with applied field (H.

  6. Política tarifária no II Reinado: evolução e impactos, 1850-1889

    Directory of Open Access Journals (Sweden)

    André Villela

    2009-06-01

    Full Text Available The article analyses the evolution of Brazilian tariff policy between 1844 and 1889. At first a review of the various tariff schedules adopted during the period is made, with their main features highlighted. The next section seeks to assess the impact of tariff policy on the degree of protection afforded to the domestic sector. To that effect, three types of exercises are carried out: first, the “real cost of imports” and its determinants are calculated; we then calculate coefficients of partial correlation between the quantity of imports, GDP, price of imports, the rate of exchange and import tariffs; finally, we estimate econometrically import demand equations. The exercises reveal that during the II Reign tariffs were important in explaining variations in total imports, although this importance diminished after 1869.

  7. Dilemas da cooperação: conflitos gerados pela política das "Listas Negras" no Brasil durante a Segunda Guerra Mundial Dilemmas of cooperation: the conflicts provoked by the policy of "Black Lists" in Brazil during World War II

    Directory of Open Access Journals (Sweden)

    Tania Quintaneiro

    2006-12-01

    Full Text Available No artigo são analisados os conflitos políticos gerados pela implementação das "Listas Negras" norte-americanas entre órgãos estatais e interesses privados no Brasil durante a Segunda Guerra Mundial.The article analyses the political conflicts caused by the implementation of American Black Lists between State agencies and private interests in Brazil during World War II.

  8. An H3K9/S10 methyl-phospho switch modulates Polycomb and Pol II binding at repressed genes during differentiation.

    Science.gov (United States)

    Sabbattini, Pierangela; Sjoberg, Marcela; Nikic, Svetlana; Frangini, Alberto; Holmqvist, Per-Henrik; Kunowska, Natalia; Carroll, Tom; Brookes, Emily; Arthur, Simon J; Pombo, Ana; Dillon, Niall

    2014-03-01

    Methylated histones H3K9 and H3K27 are canonical epigenetic silencing modifications in metazoan organisms, but the relationship between the two modifications has not been well characterized. H3K9me3 coexists with H3K27me3 in pluripotent and differentiated cells. However, we find that the functioning of H3K9me3 is altered by H3S10 phosphorylation in differentiated postmitotic osteoblasts and cycling B cells. Deposition of H3K9me3/S10ph at silent genes is partially mediated by the mitogen- and stress-activated kinases (MSK1/2) and the Aurora B kinase. Acquisition of H3K9me3/S10ph during differentiation correlates with loss of paused S5 phosphorylated RNA polymerase II, which is present on Polycomb-regulated genes in embryonic stem cells. Reduction of the levels of H3K9me3/S10ph by kinase inhibition results in increased binding of RNAPIIS5ph and the H3K27 methyltransferase Ezh1 at silent promoters. Our results provide evidence of a novel developmentally regulated methyl-phospho switch that modulates Polycomb regulation in differentiated cells and stabilizes repressed states.

  9. An enhanced method for sequence walking and paralog mining: TOPO® Vector-Ligation PCR

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    Davis Thomas M

    2010-03-01

    Full Text Available Abstract Background Although technological advances allow for the economical acquisition of whole genome sequences, many organisms' genomes remain unsequenced, and fully sequenced genomes may contain gaps. Researchers reliant upon partial genomic or heterologous sequence information require methods for obtaining unknown sequences from loci of interest. Various PCR based techniques are available for sequence walking - i.e., the acquisition of unknown DNA sequence adjacent to known sequence. Many such methods require rigid, elaborate protocols and/or impose narrowly confined options in the choice of restriction enzymes for necessary genomic digests. We describe a new method, TOPO® Vector-Ligation PCR (or TVL-PCR that innovatively integrates available tools and familiar concepts to offer advantages as a means of both targeted sequence walking and paralog mining. Findings TVL-PCR exploits the ligation efficiency of the pCR®4-TOPO® (Invitrogen, Carlsbad, California vector system to capture fragments of unknown sequence by creating chimeric molecules containing defined priming sites at both ends. Initially, restriction enzyme-digested genomic DNA is end-repaired to create 3' adenosine overhangs and is then ligated to pCR4-TOPO vectors. The ligation product pool is used directly as a template for nested PCR, using specific primers to target orthologous sequences, or degenerate primers to enable capture of paralogous gene family members. We demonstrated the efficacy of this method by capturing entire coding and partial promoter sequences of several strawberry Superman-like genes. Conclusions TVL-PCR is a convenient and efficient method for DNA sequence walking and paralog mining that is applicable to any organism for which relevant DNA sequence is available as a basis for primer design.

  10. Phylogenetic reconstruction of orthology, paralogy, and conserved synteny for dog and human.

    Science.gov (United States)

    Goodstadt, Leo; Ponting, Chris P

    2006-09-29

    Accurate predictions of orthology and paralogy relationships are necessary to infer human molecular function from experiments in model organisms. Previous genome-scale approaches to predicting these relationships have been limited by their use of protein similarity and their failure to take into account multiple splicing events and gene prediction errors. We have developed PhyOP, a new phylogenetic orthology prediction pipeline based on synonymous rate estimates, which accurately predicts orthology and paralogy relationships for transcripts, genes, exons, or genomic segments between closely related genomes. We were able to identify orthologue relationships to human genes for 93% of all dog genes from Ensembl. Among 1:1 orthologues, the alignments covered a median of 97.4% of protein sequences, and 92% of orthologues shared essentially identical gene structures. PhyOP accurately recapitulated genomic maps of conserved synteny. Benchmarking against predictions from Ensembl and Inparanoid showed that PhyOP is more accurate, especially in its predictions of paralogy. Nearly half (46%) of PhyOP paralogy predictions are unique. Using PhyOP to investigate orthologues and paralogues in the human and dog genomes, we found that the human assembly contains 3-fold more gene duplications than the dog. Species-specific duplicate genes, or "in-paralogues," are generally shorter and have fewer exons than 1:1 orthologues, which is consistent with selective constraints and mutation biases based on the sizes of duplicated genes. In-paralogues have experienced elevated amino acid and synonymous nucleotide substitution rates. Duplicates possess similar biological functions for either the dog or human lineages. Having accounted for 2,954 likely pseudogenes and gene fragments, and after separating 346 erroneously merged genes, we estimated that the human genome encodes a minimum of 19,700 protein-coding genes, similar to the gene count of nematode worms. PhyOP is a fast and robust

  11. Phylogenetic reconstruction of orthology, paralogy, and conserved synteny for dog and human.

    Directory of Open Access Journals (Sweden)

    Leo Goodstadt

    2006-09-01

    Full Text Available Accurate predictions of orthology and paralogy relationships are necessary to infer human molecular function from experiments in model organisms. Previous genome-scale approaches to predicting these relationships have been limited by their use of protein similarity and their failure to take into account multiple splicing events and gene prediction errors. We have developed PhyOP, a new phylogenetic orthology prediction pipeline based on synonymous rate estimates, which accurately predicts orthology and paralogy relationships for transcripts, genes, exons, or genomic segments between closely related genomes. We were able to identify orthologue relationships to human genes for 93% of all dog genes from Ensembl. Among 1:1 orthologues, the alignments covered a median of 97.4% of protein sequences, and 92% of orthologues shared essentially identical gene structures. PhyOP accurately recapitulated genomic maps of conserved synteny. Benchmarking against predictions from Ensembl and Inparanoid showed that PhyOP is more accurate, especially in its predictions of paralogy. Nearly half (46% of PhyOP paralogy predictions are unique. Using PhyOP to investigate orthologues and paralogues in the human and dog genomes, we found that the human assembly contains 3-fold more gene duplications than the dog. Species-specific duplicate genes, or "in-paralogues," are generally shorter and have fewer exons than 1:1 orthologues, which is consistent with selective constraints and mutation biases based on the sizes of duplicated genes. In-paralogues have experienced elevated amino acid and synonymous nucleotide substitution rates. Duplicates possess similar biological functions for either the dog or human lineages. Having accounted for 2,954 likely pseudogenes and gene fragments, and after separating 346 erroneously merged genes, we estimated that the human genome encodes a minimum of 19,700 protein-coding genes, similar to the gene count of nematode worms. PhyOP is a

  12. Propuesta de Modelo Teórico que señala las variables de la Mercadotecnia política que influyen en el comportamiento electoral. Caso: Delegación D-II-IPN-7 del SNTE

    OpenAIRE

    Parra Ortega, Viridiana

    2013-01-01

    En Mexico cada vez mas se manejan estrategias de mercadotecnia política para lograr incentivar la desicion del voto, diversas variables que afectan el comportamiento electoral se encuentran inmersas dentro de la aplicación y estudio de la mercadotecnia política, pero no se han determinado las variables de mercadotecnia política que influyen en el comportamiento electoral.A partir de lo anterior el objetivo de esta investigación es: proponer un modelo teórico que señale las variables de mercad...

  13. Relief of autoinhibition by conformational switch explains enzyme activation by a catalytically dead paralog

    Energy Technology Data Exchange (ETDEWEB)

    Volkov, Oleg A.; Kinch, Lisa; Ariagno, Carson; Deng, Xiaoyi; Zhong, Shihua; Grishin, Nick; Tomchick, Diana R.; Chen, Zhe; Phillips, Margaret A.

    2016-12-15

    Catalytically inactive enzyme paralogs occur in many genomes. Some regulate their active counterparts but the structural principles of this regulation remain largely unknown. We report X-ray structures ofTrypanosoma brucei S-adenosylmethionine decarboxylase alone and in functional complex with its catalytically dead paralogous partner, prozyme. We show monomericTbAdoMetDC is inactive because of autoinhibition by its N-terminal sequence. Heterodimerization with prozyme displaces this sequence from the active site through a complex mechanism involving acis-to-transproline isomerization, reorganization of a β-sheet, and insertion of the N-terminal α-helix into the heterodimer interface, leading to enzyme activation. We propose that the evolution of this intricate regulatory mechanism was facilitated by the acquisition of the dimerization domain, a single step that can in principle account for the divergence of regulatory schemes in the AdoMetDC enzyme family. These studies elucidate an allosteric mechanism in an enzyme and a plausible scheme by which such complex cooperativity evolved.

  14. Reconstructing the Evolutionary History of Paralogous APETALA1/FRUITFULL-Like Genes in Grasses (Poaceae)

    Science.gov (United States)

    Preston, Jill C.; Kellogg, Elizabeth A.

    2006-01-01

    Gene duplication is an important mechanism for the generation of evolutionary novelty. Paralogous genes that are not silenced may evolve new functions (neofunctionalization) that will alter the developmental outcome of preexisting genetic pathways, partition ancestral functions (subfunctionalization) into divergent developmental modules, or function redundantly. Functional divergence can occur by changes in the spatio-temporal patterns of gene expression and/or by changes in the activities of their protein products. We reconstructed the evolutionary history of two paralogous monocot MADS-box transcription factors, FUL1 and FUL2, and determined the evolution of sequence and gene expression in grass AP1/FUL-like genes. Monocot AP1/FUL-like genes duplicated at the base of Poaceae and codon substitutions occurred under relaxed selection mostly along the branch leading to FUL2. Following the duplication, FUL1 was apparently lost from early diverging taxa, a pattern consistent with major changes in grass floral morphology. Overlapping gene expression patterns in leaves and spikelets indicate that FUL1 and FUL2 probably share some redundant functions, but that FUL2 may have become temporally restricted under partial subfunctionalization to particular stages of floret development. These data have allowed us to reconstruct the history of AP1/FUL-like genes in Poaceae and to hypothesize a role for this gene duplication in the evolution of the grass spikelet. PMID:16816429

  15. [Divergence of paralogous growth-hormone-encoding genes and their promoters in Salmonidae].

    Science.gov (United States)

    Kamenskaya, D N; Pankova, M V; Atopkin, D M; Brykov, V A

    2017-01-01

    In many fish species, including salmonids, the growth-hormone is encoded by two duplicated paralogous genes, gh1 and gh2. Both genes were already in place at the time of divergence of species in this group. A comparison of the entire sequence of these genes of salmonids has shown that their conserved regions are associated with exons, while their most variable regions correspond to introns. Introns C and D include putative regulatory elements (sites Pit-1, CRE, and ERE), that are also conserved. In chars, the degree of polymorphism of gh2 gene is 2-3 times as large as that in gh1 gene. However, a comparison across all Salmonidae species would not extent this observation to other species. In both these chars' genes, the promoters are conserved mainly because they correspond to putative regulatory sequences (TATA box, binding sites for the pituitary transcription factor Pit-1 (F1-F4), CRE, GRE and RAR/RXR elements). The promoter of gh2 gene has a greater degree of polymorphism compared with gh1 gene promoter in all investigated species of salmonids. The observed differences in the rates of accumulation of changes in growth hormone encoding paralogs could be explained by differences in the intensity of selection.

  16. Legalidad islámica y legitimidad política en el Califato de Córdoba: la proclamación de Hišām II

    Directory of Open Access Journals (Sweden)

    García Sanjuán, Alejandro

    2008-06-01

    Full Text Available This article deals with the process of proclamation as Caliph of Cordoba of Hišām, son and next-in-line to al-Ḥakam II, when he was scarcely eleven years old. Two problems are analyzed in relation to this aspect. On the one hand, from a legal point of view, it is brought into question the lawfulness of the government of an under age in the classical Islamic societies. On the other hand, the political crisis produced by the proclamation of Hišām as a consequence of the opposition to his proclamation in certain juridical and palatine circles. In this context, Ibn Abī ‘Āmir, the future Almanzor, managed to usurp the political authority, pushing aside the caliph and making in that way the caliphal institution fall into disrepute. As a result, the proclamation of Hišām constitutes the first stage of the crisis of the Cordoban caliphate, which finally led to its collapse.

    Este artículo aborda el proceso de proclamación como califa de Córdoba de Hišām, hijo y sucesor de al-Ḥakam II, cuando era todavía un niño de apenas once años. En relación con este aspecto, se analizan dos problemas. Desde el punto de vista jurídico, la cuestión de la legalidad del gobierno de un menor de edad en las sociedades islámicas clásicas. Por otro lado, la crisis política que la proclamación de Hišām desencadenó, debido a las resistencias que generaba en ciertos medios palatinos y jurídicos su minoría. En este contexto, Ibn Abī ‘Āmir, futuro Almanzor, logró usurpar el ejercicio del poder, marginando por completo al califa y provocando con ello el descrédito de la institución califal. Por todo ello, la proclamación de Hišām constituye la primera fase en la crisis del califato de Córdoba, que acabó desembocando en su abolición.

  17. Chromosome structures: reduction of certain problems with unequal gene content and gene paralogs to integer linear programming.

    Science.gov (United States)

    Lyubetsky, Vassily; Gershgorin, Roman; Gorbunov, Konstantin

    2017-12-06

    Chromosome structure is a very limited model of the genome including the information about its chromosomes such as their linear or circular organization, the order of genes on them, and the DNA strand encoding a gene. Gene lengths, nucleotide composition, and intergenic regions are ignored. Although highly incomplete, such structure can be used in many cases, e.g., to reconstruct phylogeny and evolutionary events, to identify gene synteny, regulatory elements and promoters (considering highly conserved elements), etc. Three problems are considered; all assume unequal gene content and the presence of gene paralogs. The distance problem is to determine the minimum number of operations required to transform one chromosome structure into another and the corresponding transformation itself including the identification of paralogs in two structures. We use the DCJ model which is one of the most studied combinatorial rearrangement models. Double-, sesqui-, and single-operations as well as deletion and insertion of a chromosome region are considered in the model; the single ones comprise cut and join. In the reconstruction problem, a phylogenetic tree with chromosome structures in the leaves is given. It is necessary to assign the structures to inner nodes of the tree to minimize the sum of distances between terminal structures of each edge and to identify the mutual paralogs in a fairly large set of structures. A linear algorithm is known for the distance problem without paralogs, while the presence of paralogs makes it NP-hard. If paralogs are allowed but the insertion and deletion operations are missing (and special constraints are imposed), the reduction of the distance problem to integer linear programming is known. Apparently, the reconstruction problem is NP-hard even in the absence of paralogs. The problem of contigs is to find the optimal arrangements for each given set of contigs, which also includes the mutual identification of paralogs. We proved that these

  18. Computational Identification of the Paralogs and Orthologs of Human Cytochrome P450 Superfamily and the Implication in Drug Discovery

    Directory of Open Access Journals (Sweden)

    Shu-Ting Pan

    2016-06-01

    Full Text Available The human cytochrome P450 (CYP superfamily consisting of 57 functional genes is the most important group of Phase I drug metabolizing enzymes that oxidize a large number of xenobiotics and endogenous compounds, including therapeutic drugs and environmental toxicants. The CYP superfamily has been shown to expand itself through gene duplication, and some of them become pseudogenes due to gene mutations. Orthologs and paralogs are homologous genes resulting from speciation or duplication, respectively. To explore the evolutionary and functional relationships of human CYPs, we conducted this bioinformatic study to identify their corresponding paralogs, homologs, and orthologs. The functional implications and implications in drug discovery and evolutionary biology were then discussed. GeneCards and Ensembl were used to identify the paralogs of human CYPs. We have used a panel of online databases to identify the orthologs of human CYP genes: NCBI, Ensembl Compara, GeneCards, OMA (“Orthologous MAtrix” Browser, PATHER, TreeFam, EggNOG, and Roundup. The results show that each human CYP has various numbers of paralogs and orthologs using GeneCards and Ensembl. For example, the paralogs of CYP2A6 include CYP2A7, 2A13, 2B6, 2C8, 2C9, 2C18, 2C19, 2D6, 2E1, 2F1, 2J2, 2R1, 2S1, 2U1, and 2W1; CYP11A1 has 6 paralogs including CYP11B1, 11B2, 24A1, 27A1, 27B1, and 27C1; CYP51A1 has only three paralogs: CYP26A1, 26B1, and 26C1; while CYP20A1 has no paralog. The majority of human CYPs are well conserved from plants, amphibians, fishes, or mammals to humans due to their important functions in physiology and xenobiotic disposition. The data from different approaches are also cross-validated and validated when experimental data are available. These findings facilitate our understanding of the evolutionary relationships and functional implications of the human CYP superfamily in drug discovery.

  19. Properties of Sequence Conservation in Upstream Regulatory and Protein Coding Sequences among Paralogs in Arabidopsis thaliana

    Science.gov (United States)

    Richardson, Dale N.; Wiehe, Thomas

    Whole genome duplication (WGD) has catalyzed the formation of new species, genes with novel functions, altered expression patterns, complexified signaling pathways and has provided organisms a level of genetic robustness. We studied the long-term evolution and interrelationships of 5’ upstream regulatory sequences (URSs), protein coding sequences (CDSs) and expression correlations (EC) of duplicated gene pairs in Arabidopsis. Three distinct methods revealed significant evolutionary conservation between paralogous URSs and were highly correlated with microarray-based expression correlation of the respective gene pairs. Positional information on exact matches between sequences unveiled the contribution of micro-chromosomal rearrangements on expression divergence. A three-way rank analysis of URS similarity, CDS divergence and EC uncovered specific gene functional biases. Transcription factor activity was associated with gene pairs exhibiting conserved URSs and divergent CDSs, whereas a broad array of metabolic enzymes was found to be associated with gene pairs showing diverged URSs but conserved CDSs.

  20. SPOCS: Software for Predicting and Visualizing Orthology/Paralogy Relationships Among Genomes

    Energy Technology Data Exchange (ETDEWEB)

    Curtis, Darren S.; Phillips, Aaron R.; Callister, Stephen J.; Conlan, Sean; McCue, Lee Ann

    2013-10-15

    At the rate that prokaryotic genomes can now be generated, comparative genomics studies require a flexible method for quickly and accurately predicting orthologs among the rapidly changing set of genomes available. SPOCS implements a graph-based ortholog prediction method to generate a simple tab-delimited table of orthologs and in addition, html files that provide a visualization of the predicted ortholog/paralog relationships to which gene/protein expression metadata may be overlaid. AVAILABILITY AND IMPLEMENTATION: A SPOCS web application is freely available at http://cbb.pnnl.gov/portal/tools/spocs.html. Source code for Linux systems is also freely available under an open source license at http://cbb.pnnl.gov/portal/software/spocs.html; the Boost C++ libraries and BLAST are required.

  1. Highly divergent 18S rRNA gene paralogs in a Cryptosporidium genotype from eastern chipmunks (Tamias striatus)

    Czech Academy of Sciences Publication Activity Database

    Stenger, B.L.S.; Clark, M.E.; Kváč, Martin; Khan, E.; Giddings, C.W.; Dyer, N.W.; Schultz, J.L.; McEvoy, J.M.

    2015-01-01

    Roč. 32, JUN 2015 (2015), s. 113-123 ISSN 1567-1348 R&D Projects: GA MŠk(CZ) LH11061 Institutional support: RVO:60077344 Keywords : Cryptosporidium * Paralogy * 18S rRNA * 18S rDNA Subject RIV: GJ - Animal Vermins ; Diseases, Veterinary Medicine Impact factor: 2.591, year: 2015

  2. Don't throw the baby out with the bathwater: identifying and mapping paralogs in salmonids.

    Science.gov (United States)

    Dufresne, France

    2016-01-01

    Many eukaryotic genomes contain a large fraction of gene duplicates (or paralogs) as a result of ancient or recent whole-genome duplications (Ohno 1970; Jaillon et al. 2004; Kellis et al. 2004). Identifying paralogs with NGS data is a pervasive problem in both ancient polyploids and neopolyploids. Likewise, paralogs are often treated as a nuisance that has to be detected and removed (Everett et al. 2012). In this issue of Molecular Ecology Resources, Waples et al. (2015) show that exclusion might not be necessary and how we may miss out on important genomic information in doing so. They present a novel statistical approach to detect paralogs based on the segregation of RAD loci in haploid offspring and test their method by constructing linkage maps with and without these duplicated loci in chum salmon, Oncorhynchus keta (Fig.1). Their linkage map including the resolved paralogs shows that these are mostly located in the distal regions of several linkage groups. Particularly intriguing is their finding that these homoeologous regions appear impoverished in transposable elements (TE). Given the role that TE play in genome remodelling, it is noteworthy that these elements are of low abundance in regions showing residual tetrasomic inheritance. This raises the question whether re-diploidization is constrained in these regions and whether they might have a role to play in salmonid speciation. This study provides an original approach to identifying duplicated loci in species with a pedigree, as well as providing a dense linkage map for chum salmon, and interesting insights into the retention of gene duplicates in an ancient polyploid. © 2015 John Wiley & Sons Ltd.

  3. As políticas activas e passivas do mercado de trabalho

    OpenAIRE

    Novo, Álvaro; Centeno, Mário

    2008-01-01

    A generalidade dos países utiliza políticas destinadas a minorar os custos sociais e individuais do desemprego. Os economistas classificam estas políticas do mercado de trabalho em dois grupos: (i) políticas activas e (ii) políticas passivas. As primeiras têm como objectivo dotar os desempregados com as qualificações necessárias para minimizar a duração do desemprego, enquanto as segundas visam garantir uma fonte de rendimento durante o período de desemprego, sendo particularmente úteis para ...

  4. Human GW182 Paralogs Are the Central Organizers for RNA-Mediated Control of Transcription.

    Science.gov (United States)

    Hicks, Jessica A; Li, Liande; Matsui, Masayuki; Chu, Yongjun; Volkov, Oleg; Johnson, Krystal C; Corey, David R

    2017-08-15

    In the cytoplasm, small RNAs can control mammalian translation by regulating the stability of mRNA. In the nucleus, small RNAs can also control transcription and splicing. The mechanisms for RNA-mediated nuclear regulation are not understood and remain controversial, hindering the effective application of nuclear RNAi and investigation of its natural regulatory roles. Here, we reveal that the human GW182 paralogs TNRC6A/B/C are central organizing factors critical to RNA-mediated transcriptional activation. Mass spectrometry of purified nuclear lysates followed by experimental validation demonstrates that TNRC6A interacts with proteins involved in protein degradation, RNAi, the CCR4-NOT complex, the mediator complex, and histone-modifying complexes. Functional analysis implicates TNRC6A, NAT10, MED14, and WDR5 in RNA-mediated transcriptional activation. These findings describe protein complexes capable of bridging RNA-mediated sequence-specific recognition of noncoding RNA transcripts with the regulation of gene transcription. Copyright © 2017 The Authors. Published by Elsevier Inc. All rights reserved.

  5. A paralogous decoy protects Phytophthora sojae apoplastic effector PsXEG1 from a host inhibitor.

    Science.gov (United States)

    Ma, Zhenchuan; Zhu, Lin; Song, Tianqiao; Wang, Yang; Zhang, Qi; Xia, Yeqiang; Qiu, Min; Lin, Yachun; Li, Haiyang; Kong, Liang; Fang, Yufeng; Ye, Wenwu; Wang, Yan; Dong, Suomeng; Zheng, Xiaobo; Tyler, Brett M; Wang, Yuanchao

    2017-02-17

    The extracellular space (apoplast) of plant tissue represents a critical battleground between plants and attacking microbes. Here we show that a pathogen-secreted apoplastic xyloglucan-specific endoglucanase, PsXEG1, is a focus of this struggle in the Phytophthora sojae -soybean interaction. We show that soybean produces an apoplastic glucanase inhibitor protein, GmGIP1, that binds to PsXEG1 to block its contribution to virulence. P. sojae , however, secretes a paralogous PsXEG1-like protein, PsXLP1, that has lost enzyme activity but binds to GmGIP1 more tightly than does PsXEG1, thus freeing PsXEG1 to support P. sojae infection. The gene pair encoding PsXEG1 and PsXLP1 is conserved in many Phytophthora species, and the P. parasitica orthologs PpXEG1 and PpXLP1 have similar functions. Thus, this apoplastic decoy strategy may be widely used in Phytophthora pathosystems. Copyright © 2017, American Association for the Advancement of Science.

  6. Diversification of Transcriptional Regulation Determines Subfunctionalization of Paralogous Branched Chain Aminotransferases in the Yeast Saccharomyces cerevisiae.

    Science.gov (United States)

    González, James; López, Geovani; Argueta, Stefany; Escalera-Fanjul, Ximena; El Hafidi, Mohammed; Campero-Basaldua, Carlos; Strauss, Joseph; Riego-Ruiz, Lina; González, Alicia

    2017-11-01

    Saccharomyces cerevisiae harbors BAT1 and BAT2 paralogous genes that encode branched chain aminotransferases and have opposed expression profiles and physiological roles . Accordingly, in primary nitrogen sources such as glutamine, BAT1 expression is induced, supporting Bat1-dependent valine-isoleucine-leucine (VIL) biosynthesis, while BAT2 expression is repressed. Conversely, in the presence of VIL as the sole nitrogen source, BAT1 expression is hindered while that of BAT2 is activated, resulting in Bat2-dependent VIL catabolism. The presented results confirm that BAT1 expression is determined by transcriptional activation through the action of the Leu3-α-isopropylmalate (α-IPM) active isoform, and uncovers the existence of a novel α-IPM biosynthetic pathway operating in a put3 Δ mutant grown on VIL, through Bat2-Leu2-Leu1 consecutive action. The classic α-IPM biosynthetic route operates in glutamine through the action of the leucine-sensitive α-IPM synthases. The presented results also show that BAT2 repression in glutamine can be alleviated in a ure2 Δ mutant or through Gcn4-dependent transcriptional activation. Thus, when S. cerevisiae is grown on glutamine, VIL biosynthesis is predominant and is preferentially achieved through BAT1 ; while on VIL as the sole nitrogen source, catabolism prevails and is mainly afforded by BAT2 . Copyright © 2017 by the Genetics Society of America.

  7. Decoding the Divergent Subcellular Location of Two Highly Similar Paralogous LEA Proteins

    Directory of Open Access Journals (Sweden)

    Marie-Hélène Avelange-Macherel

    2018-05-01

    Full Text Available Many mitochondrial proteins are synthesized as precursors in the cytosol with an N-terminal mitochondrial targeting sequence (MTS which is cleaved off upon import. Although much is known about import mechanisms and MTS structural features, the variability of MTS still hampers robust sub-cellular software predictions. Here, we took advantage of two paralogous late embryogenesis abundant proteins (LEA from Arabidopsis with different subcellular locations to investigate structural determinants of mitochondrial import and gain insight into the evolution of the LEA genes. LEA38 and LEA2 are short proteins of the LEA_3 family, which are very similar along their whole sequence, but LEA38 is targeted to mitochondria while LEA2 is cytosolic. Differences in the N-terminal protein sequences were used to generate a series of mutated LEA2 which were expressed as GFP-fusion proteins in leaf protoplasts. By combining three types of mutation (substitution, charge inversion, and segment replacement, we were able to redirect the mutated LEA2 to mitochondria. Analysis of the effect of the mutations and determination of the LEA38 MTS cleavage site highlighted important structural features within and beyond the MTS. Overall, these results provide an explanation for the likely loss of mitochondrial location after duplication of the ancestral gene.

  8. Trichomonas vaginalis Repair of Iron Centres Proteins: The Different Role of Two Paralogs.

    Science.gov (United States)

    Nobre, Lígia S; Meloni, Dionigia; Teixeira, Miguel; Viscogliosi, Eric; Saraiva, Lígia M

    2016-06-01

    Trichomonas vaginalis, the causative parasite of one of the most prevalent sexually transmitted diseases is, so far, the only protozoan encoding two putative Repair of Iron Centres (RIC) proteins. Homologs of these proteins have been shown to protect bacteria from the chemical stress imposed by mammalian immunity. In this work, the biochemical and functional characterisation of the T. vaginalis RICs revealed that the two proteins have different properties. Expression of ric1 is induced by nitrosative stress but not by hydrogen peroxide, while ric2 transcription remained unaltered under similar conditions. T. vaginalis RIC1 contains a di-iron centre, but RIC2 apparently does not. Only RIC1 resembles bacterial RICs on spectroscopic profiling and repairing ability of oxidatively-damaged iron-sulfur clusters. Unexpectedly, RIC2 was found to bind DNA plasmid and T. vaginalis genomic DNA, a function proposed to be related with its leucine zipper domain. The two proteins also differ in their cellular localization: RIC1 is expressed in the cytoplasm only, and RIC2 occurs both in the nucleus and cytoplasm. Therefore, we concluded that the two RIC paralogs have different roles in T. vaginalis, with RIC2 showing an unprecedented DNA binding ability when compared with all other until now studied RICs. Copyright © 2016 Elsevier GmbH. All rights reserved.

  9. Paralogs hnRNP L and hnRNP LL exhibit overlapping but distinct RNA binding constraints.

    Directory of Open Access Journals (Sweden)

    Sarah A Smith

    Full Text Available HnRNP (heterogeneous nuclear ribonucleoprotein proteins are a large family of RNA-binding proteins that regulate numerous aspects of RNA processing. Interestingly, several paralogous pairs of hnRNPs exist that exhibit similar RNA-binding specificity to one another, yet have non-redundant functional targets in vivo. In this study we systematically investigate the possibility that the paralogs hnRNP L and hnRNP LL have distinct RNA binding determinants that may underlie their lack of functional redundancy. Using a combination of RNAcompete and native gel analysis we find that while both hnRNP L and hnRNP LL preferentially bind sequences that contain repeated CA dinucleotides, these proteins differ in their requirement for the spacing of the CAs. Specifically, hnRNP LL has a more stringent requirement for a two nucleotide space between CA repeats than does hnRNP L, resulting in hnRNP L binding more promiscuously than does hnRNP LL. Importantly, this differential requirement for the spacing of CA dinucleotides explains the previously observed differences in the sensitivity of hnRNP L and LL to mutations within the CD45 gene. We suggest that overlapping but divergent RNA-binding preferences, as we show here for hnRNP L and hnRNP LL, may be commonplace among other hnRNP paralogs.

  10. Petal-specific subfunctionalization of an APETALA3 paralog in the Ranunculales and its implications for petal evolution.

    Science.gov (United States)

    Sharma, Bharti; Guo, Chunce; Kong, Hongzhi; Kramer, Elena M

    2011-08-01

    • The petals of the lower eudicot family Ranunculaceae are thought to have been derived many times independently from stamens. However, investigation of the genetic basis of their identity has suggested an alternative hypothesis: that they share a commonly inherited petal identity program. This theory is based on the fact that an ancient paralogous lineage of APETALA3 (AP3) in the Ranunculaceae appears to have a conserved, petal-specific expression pattern. • Here, we have used a combination of approaches, including RNAi, comparative gene expression and molecular evolutionary studies, to understand the function of this petal-specific AP3 lineage. • Functional analysis of the Aquilegia locus AqAP3-3 has demonstrated that the paralog is required for petal identity with little contribution to the identity of the other floral organs. Expanded expression studies and analyses of molecular evolutionary patterns provide further evidence that orthologs of AqAP3-3 are primarily expressed in petals and are under higher purifying selection across the family than the other AP3 paralogs. • Taken together, these findings suggest that the AqAP3-3 lineage underwent progressive subfunctionalization within the order Ranunculales, ultimately yielding a specific role in petal identity that has probably been conserved, in stark contrast with the multiple independent origins predicted by botanical theories. © 2011 The Authors. New Phytologist © 2011 New Phytologist Trust.

  11. Paralog-Specific Patterns of Structural Disorder and Phosphorylation in the Vertebrate SH3-SH2-Tyrosine Kinase Protein Family.

    Science.gov (United States)

    Dos Santos, Helena G; Siltberg-Liberles, Jessica

    2016-09-19

    One of the largest multigene families in Metazoa are the tyrosine kinases (TKs). These are important multifunctional proteins that have evolved as dynamic switches that perform tyrosine phosphorylation and other noncatalytic activities regulated by various allosteric mechanisms. TKs interact with each other and with other molecules, ultimately activating and inhibiting different signaling pathways. TKs are implicated in cancer and almost 30 FDA-approved TK inhibitors are available. However, specific binding is a challenge when targeting an active site that has been conserved in multiple protein paralogs for millions of years. A cassette domain (CD) containing SH3-SH2-Tyrosine Kinase domains reoccurs in vertebrate nonreceptor TKs. Although part of the CD function is shared between TKs, it also presents TK specific features. Here, the evolutionary dynamics of sequence, structure, and phosphorylation across the CD in 17 TK paralogs have been investigated in a large-scale study. We establish that TKs often have ortholog-specific structural disorder and phosphorylation patterns, while secondary structure elements, as expected, are highly conserved. Further, domain-specific differences are at play. Notably, we found the catalytic domain to fluctuate more in certain secondary structure elements than the regulatory domains. By elucidating how different properties evolve after gene duplications and which properties are specifically conserved within orthologs, the mechanistic understanding of protein evolution is enriched and regions supposedly critical for functional divergence across paralogs are highlighted. © The Author 2016. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.

  12. Política y Administración Provincial. La Diputación de Sevilla durante la Dictadura de Primo de Rivera y la II República (1923-1936).

    OpenAIRE

    Ponce Alberca, Julio

    2016-01-01

    Desde la perspectiva de fines del siglo XX, los regímenes políticos de la España de los años veinte y treinta aparecen como una secuencia de ensayos en respuesta a la profunda crisis sufrida por el sistema de la Restauración (1876-1923). Bajo ese enfoque, la Segunda República (1931-1936) se nos muestra inscrita en el esfuerzo por encontrar una nueva alternativa tras el fracaso de la Dictadura primorriverista (1923-1930) y las dictablandas del genera...

  13. Bases teórico-políticas del bloque ibérico : la relación peninsular en la fase de inflexión de la II Guerra Mundial, 1942-1945

    OpenAIRE

    Juan Carlos Jiménez Redondo

    1994-01-01

    Al abordar las relaciones entre España y Portugal cualquiera que sea el momento histórico escogido, resulta siempre sorprendente comprobar cómo una frontera política, ausente de impedimentos naturales, ha podido levantar un muro difícilmente franqueable entre ambas comunidades. De hecho, la noción de vecindad tiene en el caso hispano-portugués una dimensión estática, basada en el hecho de una contigüedad geográfica, que contrasta con la dimensión dinámica propia de una relac...

  14. Control of Copper Resistance and Inorganic Sulfur Metabolism by Paralogous Regulators in Staphylococcus aureus*

    Science.gov (United States)

    Grossoehme, Nicholas; Kehl-Fie, Thomas E.; Ma, Zhen; Adams, Keith W.; Cowart, Darin M.; Scott, Robert A.; Skaar, Eric P.; Giedroc, David P.

    2011-01-01

    All strains of Staphylococcus aureus encode a putative copper-sensitive operon repressor (CsoR) and one other CsoR-like protein of unknown function. We show here that NWMN_1991 encodes a bona fide Cu(I)-inducible CsoR of a genetically unlinked copA-copZ copper resistance operon in S. aureus strain Newman. In contrast, an unannotated open reading frame found between NWMN_0027 and NWMN_0026 (denoted NWMN_0026.5) encodes a CsoR-like regulator that represses expression of adjacent genes by binding specifically to a pair of canonical operator sites positioned in the NWMN_0027–0026.5 intergenic region. Inspection of these regulated genes suggests a role in assimilation of inorganic sulfur from thiosulfate and vectorial sulfur transfer, and we designate NWMN_0026.5 as CstR (CsoR-like sulfur transferase repressor). Expression analysis demonstrates that CsoR and CstR control their respective regulons in response to distinct stimuli with no overlap in vivo. Unlike CsoR, CstR does not form a stable complex with Cu(I); operator binding is instead inhibited by oxidation of the intersubunit cysteine pair to a mixture of disulfide and trisulfide linkages by a likely metabolite of thiosulfate assimilation, sulfite. CsoR is unreactive toward sulfite under the same conditions. We conclude that CsoR and CstR are paralogs in S. aureus that function in the same cytoplasm to control distinct physiological processes. PMID:21339296

  15. Control of copper resistance and inorganic sulfur metabolism by paralogous regulators in Staphylococcus aureus.

    Science.gov (United States)

    Grossoehme, Nicholas; Kehl-Fie, Thomas E; Ma, Zhen; Adams, Keith W; Cowart, Darin M; Scott, Robert A; Skaar, Eric P; Giedroc, David P

    2011-04-15

    All strains of Staphylococcus aureus encode a putative copper-sensitive operon repressor (CsoR) and one other CsoR-like protein of unknown function. We show here that NWMN_1991 encodes a bona fide Cu(I)-inducible CsoR of a genetically unlinked copA-copZ copper resistance operon in S. aureus strain Newman. In contrast, an unannotated open reading frame found between NWMN_0027 and NWMN_0026 (denoted NWMN_0026.5) encodes a CsoR-like regulator that represses expression of adjacent genes by binding specifically to a pair of canonical operator sites positioned in the NWMN_0027-0026.5 intergenic region. Inspection of these regulated genes suggests a role in assimilation of inorganic sulfur from thiosulfate and vectorial sulfur transfer, and we designate NWMN_0026.5 as CstR (CsoR-like sulfur transferase repressor). Expression analysis demonstrates that CsoR and CstR control their respective regulons in response to distinct stimuli with no overlap in vivo. Unlike CsoR, CstR does not form a stable complex with Cu(I); operator binding is instead inhibited by oxidation of the intersubunit cysteine pair to a mixture of disulfide and trisulfide linkages by a likely metabolite of thiosulfate assimilation, sulfite. CsoR is unreactive toward sulfite under the same conditions. We conclude that CsoR and CstR are paralogs in S. aureus that function in the same cytoplasm to control distinct physiological processes.

  16. Aldehyde Dehydrogenase Gene Superfamily in Populus: Organization and Expression Divergence between Paralogous Gene Pairs.

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    Feng-Xia Tian

    Full Text Available Aldehyde dehydrogenases (ALDHs constitute a superfamily of NAD(P+-dependent enzymes that catalyze the irreversible oxidation of a wide range of reactive aldehydes to their corresponding nontoxic carboxylic acids. ALDHs have been studied in many organisms from bacteria to mammals; however, no systematic analyses incorporating genome organization, gene structure, expression profiles, and cis-acting elements have been conducted in the model tree species Populus trichocarpa thus far. In this study, a comprehensive analysis of the Populus ALDH gene superfamily was performed. A total of 26 Populus ALDH genes were found to be distributed across 12 chromosomes. Genomic organization analysis indicated that purifying selection may have played a pivotal role in the retention and maintenance of PtALDH gene families. The exon-intron organizations of PtALDHs were highly conserved within the same family, suggesting that the members of the same family also may have conserved functionalities. Microarray data and qRT-PCR analysis indicated that most PtALDHs had distinct tissue-specific expression patterns. The specificity of cis-acting elements in the promoter regions of the PtALDHs and the divergence of expression patterns between nine paralogous PtALDH gene pairs suggested that gene duplications may have freed the duplicate genes from the functional constraints. The expression levels of some ALDHs were up- or down-regulated by various abiotic stresses, implying that the products of these genes may be involved in the adaptation of Populus to abiotic stresses. Overall, the data obtained from our investigation contribute to a better understanding of the complexity of the Populus ALDH gene superfamily and provide insights into the function and evolution of ALDH gene families in vascular plants.

  17. Aldehyde Dehydrogenase Gene Superfamily in Populus: Organization and Expression Divergence between Paralogous Gene Pairs.

    Science.gov (United States)

    Tian, Feng-Xia; Zang, Jian-Lei; Wang, Tan; Xie, Yu-Li; Zhang, Jin; Hu, Jian-Jun

    2015-01-01

    Aldehyde dehydrogenases (ALDHs) constitute a superfamily of NAD(P)+-dependent enzymes that catalyze the irreversible oxidation of a wide range of reactive aldehydes to their corresponding nontoxic carboxylic acids. ALDHs have been studied in many organisms from bacteria to mammals; however, no systematic analyses incorporating genome organization, gene structure, expression profiles, and cis-acting elements have been conducted in the model tree species Populus trichocarpa thus far. In this study, a comprehensive analysis of the Populus ALDH gene superfamily was performed. A total of 26 Populus ALDH genes were found to be distributed across 12 chromosomes. Genomic organization analysis indicated that purifying selection may have played a pivotal role in the retention and maintenance of PtALDH gene families. The exon-intron organizations of PtALDHs were highly conserved within the same family, suggesting that the members of the same family also may have conserved functionalities. Microarray data and qRT-PCR analysis indicated that most PtALDHs had distinct tissue-specific expression patterns. The specificity of cis-acting elements in the promoter regions of the PtALDHs and the divergence of expression patterns between nine paralogous PtALDH gene pairs suggested that gene duplications may have freed the duplicate genes from the functional constraints. The expression levels of some ALDHs were up- or down-regulated by various abiotic stresses, implying that the products of these genes may be involved in the adaptation of Populus to abiotic stresses. Overall, the data obtained from our investigation contribute to a better understanding of the complexity of the Populus ALDH gene superfamily and provide insights into the function and evolution of ALDH gene families in vascular plants.

  18. Regulation of gill claudin paralogs by salinity, cortisol and prolactin in Mozambique tilapia (Oreochromis mossambicus).

    Science.gov (United States)

    Tipsmark, Christian K; Breves, Jason P; Rabeneck, D Brett; Trubitt, Rebecca T; Lerner, Darren T; Grau, E Gordon

    2016-09-01

    In euryhaline teleosts, reorganization of gill tight junctions during salinity acclimation involves dynamic expression of specific claudin (Cldn) paralogs. We identified four transcripts encoding Cldn tight junction proteins in the tilapia gill transcriptome: cldn10c, cldn10e, cldn28a and cldn30. A tissue distribution experiment found cldn10c and cldn10e expression levels in the gill to be 100-fold higher than any other tissues examined. cldn28a and cldn30 levels in the gill were 10-fold greater than levels in other tissues. Expression of these genes in Mozambique tilapia was examined during acclimation to fresh water (FW), seawater (SW), and in response to hormone treatments. Transfer of tilapia from FW to SW elevated cldn10c and cldn10e, while cldn28a and cldn30 were stimulated following transfer from SW to FW. In hypophysectomized tilapia transferred to FW, pituitary extirpation induced reduced expression of cldn10c, cldn10e and cldn28a; these effects were mitigated equally by either prolactin or cortisol replacement. In vitro experiments with gill filaments showed that cortisol stimulated expression of all four cldns examined, suggesting a direct action of cortisol in situ. Our data indicate that elevated cldn10c and cldn10e expression is important during acclimation of tilapia to SW possibly by conferring ion specific paracellular permeability. On the other hand, expression of cldn28a and cldn30 appears to contribute to reorganization of branchial epithelium during FW acclimation. Hormone treatment experiments showed that particular FW- and SW-induced cldns are controlled by cortisol and prolactin. Copyright © 2016 Elsevier Inc. All rights reserved.

  19. Parameters of proteome evolution from histograms of amino-acid sequence identities of paralogous proteins

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    Yan Koon-Kiu

    2007-11-01

    Full Text Available Abstract Background The evolution of the full repertoire of proteins encoded in a given genome is mostly driven by gene duplications, deletions, and sequence modifications of existing proteins. Indirect information about relative rates and other intrinsic parameters of these three basic processes is contained in the proteome-wide distribution of sequence identities of pairs of paralogous proteins. Results We introduce a simple mathematical framework based on a stochastic birth-and-death model that allows one to extract some of this information and apply it to the set of all pairs of paralogous proteins in H. pylori, E. coli, S. cerevisiae, C. elegans, D. melanogaster, and H. sapiens. It was found that the histogram of sequence identities p generated by an all-to-all alignment of all protein sequences encoded in a genome is well fitted with a power-law form ~ p-γ with the value of the exponent γ around 4 for the majority of organisms used in this study. This implies that the intra-protein variability of substitution rates is best described by the Gamma-distribution with the exponent α ≈ 0.33. Different features of the shape of such histograms allow us to quantify the ratio between the genome-wide average deletion/duplication rates and the amino-acid substitution rate. Conclusion We separately measure the short-term ("raw" duplication and deletion rates rdup∗ MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacPC6xNi=xH8viVGI8Gi=hEeeu0xXdbba9frFj0xb9qqpG0dXdb9aspeI8k8fiI+fsY=rqGqVepae9pg0db9vqaiVgFr0xfr=xfr=xc9adbaqaaeGacaGaaiaabeqaaeqabiWaaaGcbaGaemOCai3aa0baaSqaaiabbsgaKjabbwha1jabbchaWbqaaiabgEHiQaaaaaa@3283@, rdel∗ MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacPC6xNi=xH8viVGI8Gi=hEeeu0xXdbba9frFj0xb9qqpG0dXdb9aspeI8k8fiI+fsY=rqGqVepae9pg0db9vqaiVgFr0xfr=xfr=xc9adbaqaaeGacaGaaiaabeqaaeqabiWaaaGcbaGaemOCai3aa0baaSqaaiabbsga

  20. Exploiting a Reference Genome in Terms of Duplications: The Network of Paralogs and Single Copy Genes in Arabidopsis thaliana

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    Mara Sangiovanni

    2013-12-01

    Full Text Available Arabidopsis thaliana became the model organism for plant studies because of its small diploid genome, rapid lifecycle and short adult size. Its genome was the first among plants to be sequenced, becoming the reference in plant genomics. However, the Arabidopsis genome is characterized by an inherently complex organization, since it has undergone ancient whole genome duplications, followed by gene reduction, diploidization events and extended rearrangements, which relocated and split up the retained portions. These events, together with probable chromosome reductions, dramatically increased the genome complexity, limiting its role as a reference. The identification of paralogs and single copy genes within a highly duplicated genome is a prerequisite to understand its organization and evolution and to improve its exploitation in comparative genomics. This is still controversial, even in the widely studied Arabidopsis genome. This is also due to the lack of a reference bioinformatics pipeline that could exhaustively identify paralogs and singleton genes. We describe here a complete computational strategy to detect both duplicated and single copy genes in a genome, discussing all the methodological issues that may strongly affect the results, their quality and their reliability. This approach was used to analyze the organization of Arabidopsis nuclear protein coding genes, and besides classifying computationally defined paralogs into networks and single copy genes into different classes, it unraveled further intriguing aspects concerning the genome annotation and the gene relationships in this reference plant species. Since our results may be useful for comparative genomics and genome functional analyses, we organized a dedicated web interface to make them accessible to the scientific community.

  1. Bases teórico-políticas del bloque ibérico : la relación peninsular en la fase de inflexión de la II Guerra Mundial, 1942-1945

    Directory of Open Access Journals (Sweden)

    Juan Carlos Jiménez Redondo

    1994-01-01

    Full Text Available Al abordar las relaciones entre España y Portugal cualquiera que sea el momento histórico escogido, resulta siempre sorprendente comprobar cómo una frontera política, ausente de impedimentos naturales, ha podido levantar un muro difícilmente franqueable entre ambas comunidades. De hecho, la noción de vecindad tiene en el caso hispano-portugués una dimensión estática, basada en el hecho de una contigüedad geográfica, que contrasta con la dimensión dinámica propia de una relación de vecindad, donde los actores no sólo están unidos geográficamente sino que se da una comunicación y relación efectiva entre ellos.

  2. Structural and binding properties of two paralogous fatty acid binding proteins of Taenia solium metacestode.

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    Seon-Hee Kim

    Full Text Available BACKGROUND: Fatty acid (FA binding proteins (FABPs of helminths are implicated in acquisition and utilization of host-derived hydrophobic substances, as well as in signaling and cellular interactions. We previously demonstrated that secretory hydrophobic ligand binding proteins (HLBPs of Taenia solium metacestode (TsM, a causative agent of neurocysticercosis (NC, shuttle FAs in the surrounding host tissues and inwardly transport the FAs across the parasite syncytial membrane. However, the protein molecules responsible for the intracellular trafficking and assimilation of FAs have remained elusive. METHODOLOGY/PRINCIPAL FINDINGS: We isolated two novel TsMFABP genes (TsMFABP1 and TsMFABP2, which encoded 133- and 136-amino acid polypeptides with predicted molecular masses of 14.3 and 14.8 kDa, respectively. They shared 45% sequence identity with each other and 15-95% with other related-members. Homology modeling demonstrated a characteristic β-barrel composed of 10 anti-parallel β-strands and two α-helices. TsMFABP2 harbored two additional loops between β-strands two and three, and β-strands six and seven, respectively. TsMFABP1 was secreted into cyst fluid and surrounding environments, whereas TsMFABP2 was intracellularly confined. Partially purified native proteins migrated to 15 kDa with different isoelectric points of 9.2 (TsMFABP1 and 8.4 (TsMFABP2. Both native and recombinant proteins bound to 11-([5-dimethylaminonaphthalene-1-sulfonyl]aminoundecannoic acid, dansyl-DL-α-amino-caprylic acid, cis-parinaric acid and retinol, which were competitively inhibited by oleic acid. TsMFABP1 exhibited high affinity toward FA analogs. TsMFABPs showed weak binding activity to retinol, but TsMFABP2 showed relatively high affinity. Isolation of two distinct genes from an individual genome strongly suggested their paralogous nature. Abundant expression of TsMFABP1 and TsMFABP2 in the canal region of worm matched well with the histological distributions

  3. The tRNA synthetase paralog PoxA modifies elongation factor-P with (R)-ß-lysine

    DEFF Research Database (Denmark)

    Roy, Hervé; Zou, S Betty; Bullwinkle, Tammy J

    2011-01-01

    The lysyl-tRNA synthetase paralog PoxA modifies elongation factor P (EF-P) with a-lysine at low efficiency. Cell-free extracts containing non-a-lysine substrates of PoxA modified EF-P with a change in mass consistent with addition of ß-lysine, a substrate also predicted by genomic analyses. EF......-P was efficiently functionally modified with (R)-ß-lysine but not (S)-ß-lysine or genetically encoded a-amino acids, indicating that PoxA has evolved an activity orthogonal to that of the canonical aminoacyl-tRNA synthetases....

  4. Mechanism of selective recruitment of RNA polymerases II and III to snRNA gene promoters.

    Science.gov (United States)

    Dergai, Oleksandr; Cousin, Pascal; Gouge, Jerome; Satia, Karishma; Praz, Viviane; Kuhlman, Tracy; Lhôte, Philippe; Vannini, Alessandro; Hernandez, Nouria

    2018-05-01

    RNA polymerase II (Pol II) small nuclear RNA (snRNA) promoters and type 3 Pol III promoters have highly similar structures; both contain an interchangeable enhancer and "proximal sequence element" (PSE), which recruits the SNAP complex (SNAPc). The main distinguishing feature is the presence, in the type 3 promoters only, of a TATA box, which determines Pol III specificity. To understand the mechanism by which the absence or presence of a TATA box results in specific Pol recruitment, we examined how SNAPc and general transcription factors required for Pol II or Pol III transcription of SNAPc-dependent genes (i.e., TATA-box-binding protein [TBP], TFIIB, and TFIIA for Pol II transcription and TBP and BRF2 for Pol III transcription) assemble to ensure specific Pol recruitment. TFIIB and BRF2 could each, in a mutually exclusive fashion, be recruited to SNAPc. In contrast, TBP-TFIIB and TBP-BRF2 complexes were not recruited unless a TATA box was present, which allowed selective and efficient recruitment of the TBP-BRF2 complex. Thus, TBP both prevented BRF2 recruitment to Pol II promoters and enhanced BRF2 recruitment to Pol III promoters. On Pol II promoters, TBP recruitment was separate from TFIIB recruitment and enhanced by TFIIA. Our results provide a model for specific Pol recruitment at SNAPc-dependent promoters. © 2018 Dergai et al.; Published by Cold Spring Harbor Laboratory Press.

  5. Role for the MED21-MED7 Hinge in Assembly of the Mediator-RNA Polymerase II Holoenzyme*

    Science.gov (United States)

    Sato, Shigeo; Tomomori-Sato, Chieri; Tsai, Kuang-Lei; Yu, Xiaodi; Sardiu, Mihaela; Saraf, Anita; Washburn, Michael P.; Florens, Laurence; Asturias, Francisco J.; Conaway, Ronald C.

    2016-01-01

    Mediator plays an integral role in activation of RNA polymerase II (Pol II) transcription. A key step in activation is binding of Mediator to Pol II to form the Mediator-Pol II holoenzyme. Here, we exploit a combination of biochemistry and macromolecular EM to investigate holoenzyme assembly. We identify a subset of human Mediator head module subunits that bind Pol II independent of other subunits and thus probably contribute to a major Pol II binding site. In addition, we show that binding of human Mediator to Pol II depends on the integrity of a conserved “hinge” in the middle module MED21-MED7 heterodimer. Point mutations in the hinge region leave core Mediator intact but lead to increased disorder of the middle module and markedly reduced affinity for Pol II. These findings highlight the importance of Mediator conformation for holoenzyme assembly. PMID:27821593

  6. Molecular cloning, biochemical characterization, and expression analysis of two glutathione S-transferase paralogs from the big-belly seahorse (Hippocampus abdominalis).

    Science.gov (United States)

    Tharuka, M D Neranjan; Bathige, S D N K; Lee, Jehee

    2017-12-01

    Glutathione S-transferases (GSTs, EC 2.5.1.18) are important Phase II detoxifying enzymes that catalyze hydrophobic, electrophilic xenobiotic substance with the conjugation of reduced glutathione (GSH). In this study, GSTμ and GSTρ paralogs of GST in the big belly seahorse (Hippocampus abdominalis; HaGSTρ, HaGSTμ) were biochemically, molecularly, functionally characterized to determine their detoxification range and protective capacities upon different pathogenic stresses. HaGSTρ and HaGSTμ are composed of coding sequences of 681bp and 654bp, which encode proteins 225 and 217 amino acids, with predicted molecular masses of 26.06kDa and 25.74kDa respectively. Sequence analysis revealed that both HaGSTs comprise the characteristic GSH-binding site in the thioredoxin-like N-terminal domain and substrate binding site in the C-terminal domain. The recombinant HaGSTρ and HaGSTμ proteins catalyzed the model GST substrate 1-chloro-2, 4-dinitrobenzene (CDNB). Enzyme kinetic analysis revealed different K m and V max values for each rHaGST, suggesting that they have different conjugation rates. The optimum conditions (pH, temperature) and inhibitory assays of each protein demonstrated different optimal ranges. However, HaGSTμ was highly expressed in the ovary and gill, whereas HaGSTρ was highly expressed in the gill and pouch. mRNA expression of HaGSTρ and HaGSTμ was significantly elevated upon lipopolysaccharide, Poly (I:C), and Edwardsiella tarda challenges in liver and in blood cells as well as with Streptococcus iniae challenge in blood cells. From these collective experimental results, we propose that HaGSTρ and HaGSTμ are effective in detoxifying xenobiotic toxic agents, and importantly, their mRNA expression could be stimulated by immunological stress signals in the aquatic environment. Copyright © 2017 Elsevier Inc. All rights reserved.

  7. The ribosomal protein Rpl22 controls ribosome composition by directly repressing expression of its own paralog, Rpl22l1.

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    Monique N O'Leary

    Full Text Available Most yeast ribosomal protein genes are duplicated and their characterization has led to hypotheses regarding the existence of specialized ribosomes with different subunit composition or specifically-tailored functions. In yeast, ribosomal protein genes are generally duplicated and evidence has emerged that paralogs might have specific roles. Unlike yeast, most mammalian ribosomal proteins are thought to be encoded by a single gene copy, raising the possibility that heterogenous populations of ribosomes are unique to yeast. Here, we examine the roles of the mammalian Rpl22, finding that Rpl22(-/- mice have only subtle phenotypes with no significant translation defects. We find that in the Rpl22(-/- mouse there is a compensatory increase in Rpl22-like1 (Rpl22l1 expression and incorporation into ribosomes. Consistent with the hypothesis that either ribosomal protein can support translation, knockdown of Rpl22l1 impairs growth of cells lacking Rpl22. Mechanistically, Rpl22 regulates Rpl22l1 directly by binding to an internal hairpin structure and repressing its expression. We propose that ribosome specificity may exist in mammals, providing evidence that one ribosomal protein can influence composition of the ribosome by regulating its own paralog.

  8. Did androgen-binding protein paralogs undergo neo- and/or Subfunctionalization as the Abp gene region expanded in the mouse genome?

    Science.gov (United States)

    Karn, Robert C; Chung, Amanda G; Laukaitis, Christina M

    2014-01-01

    The Androgen-binding protein (Abp) region of the mouse genome contains 30 Abpa genes encoding alpha subunits and 34 Abpbg genes encoding betagamma subunits, their products forming dimers composed of an alpha and a betagamma subunit. We endeavored to determine how many Abp genes are expressed as proteins in tears and saliva, and as transcripts in the exocrine glands producing them. Using standard PCR, we amplified Abp transcripts from cDNA libraries of C57BL/6 mice and found fifteen Abp gene transcripts in the lacrimal gland and five in the submandibular gland. Proteomic analyses identified proteins corresponding to eleven of the lacrimal gland transcripts, all of them different from the three salivary ABPs reported previously. Our qPCR results showed that five of the six transcripts that lacked corresponding proteins are expressed at very low levels compared to those transcripts with proteins. We found 1) no overlap in the repertoires of expressed Abp paralogs in lacrimal gland/tears and salivary glands/saliva; 2) substantial sex-limited expression of lacrimal gland/tear expressed-paralogs in males but no sex-limited expression in females; and 3) that the lacrimal gland/tear expressed-paralogs are found exclusively in ancestral clades 1, 2 and 3 of the five clades described previously while the salivary glands/saliva expressed-paralogs are found only in clade 5. The number of instances of extremely low levels of transcription without corresponding protein production in paralogs specific to tears and saliva suggested the role of subfunctionalization, a derived condition wherein genes that may have been expressed highly in both glands ancestrally were down-regulated subsequent to duplication. Thus, evidence for subfunctionalization can be seen in our data and we argue that the partitioning of paralog expression between lacrimal and salivary glands that we report here occurred as the result of adaptive evolution.

  9. Molecular and functional characterization of seven Na+/K+-ATPase β subunit paralogs in Senegalese sole (Solea senegalensis Kaup, 1858).

    Science.gov (United States)

    Armesto, Paula; Infante, Carlos; Cousin, Xavier; Ponce, Marian; Manchado, Manuel

    2015-04-01

    In the present work, seven genes encoding Na(+),K(+)-ATPase (NKA) β-subunits in the teleost Solea senegalensis are described for the first time. Sequence analysis of the predicted polypeptides revealed a high degree of conservation with those of other vertebrate species and maintenance of important motifs involved in structure and function. Phylogenetic analysis clustered the seven genes into four main clades: β1 (atp1b1a and atp1b1b), β2 (atp1b2a and atp1b2b), β3 (atp1b3a and atp1b3b) and β4 (atp1b4). In juveniles, all paralogous transcripts were detected in the nine tissues examined albeit with different expression patterns. The most ubiquitous expressed gene was atp1b1a whereas atp1b1b was mainly detected in osmoregulatory organs (gill, kidney and intestine), and atp1b2a, atp1b2b, atp1b3a, atp1b3b and atp1b4 in brain. An expression analysis in three brain regions and pituitary revealed that β1-type transcripts were more abundant in pituitary than the other β paralogs with slight differences between brain regions. Quantification of mRNA abundance in gills after a salinity challenge showed an activation of atp1b1a and atp1b1b at high salinity water (60 ppt) and atp1b3a and atp1b3b in response to low salinity (5 ppt). Transcriptional analysis during larval development showed specific expression patterns for each paralog. Moreover, no differences in the expression profiles between larvae cultivated at 10 and 35 ppt were observed except for atp1b4 with higher mRNA levels at 10 than 35 ppt at 18 days post hatch. Whole-mount in situ hybridization analysis revealed that atp1b1b was mainly localized in gut, pronephric tubule, gill, otic vesicle, and chordacentrum of newly hatched larvae. All these data suggest distinct roles of NKA β subunits in tissues, during development and osmoregulation with β1 subunits involved in the adaptation to hyperosmotic conditions and β3 subunits to hypoosmotic environments. Copyright © 2014 Elsevier Inc. All rights reserved.

  10. Genomic Anatomy of a Premier Major Histocompatibility Complex Paralogous Region on Chromosome 1q21–q22

    Science.gov (United States)

    Shiina, Takashi; Ando, Asako; Suto, Yumiko; Kasai, Fumio; Shigenari, Atsuko; Takishima, Nobusada; Kikkawa, Eri; Iwata, Kyoko; Kuwano, Yuko; Kitamura, Yuka; Matsuzawa, Yumiko; Sano, Kazumi; Nogami, Masahiro; Kawata, Hisako; Li, Suyun; Fukuzumi, Yasuhito; Yamazaki, Masaaki; Tashiro, Hiroyuki; Tamiya, Gen; Kohda, Atsushi; Okumura, Katsuzumi; Ikemura, Toshimichi; Soeda, Eiichi; Mizuki, Nobuhisa; Kimura, Minoru; Bahram, Seiamak; Inoko, Hidetoshi

    2001-01-01

    Human chromosomes 1q21–q25, 6p21.3–22.2, 9q33–q34, and 19p13.1–p13.4 carry clusters of paralogous loci, to date best defined by the flagship 6p MHC region. They have presumably been created by two rounds of large-scale genomic duplications around the time of vertebrate emergence. Phylogenetically, the 1q21–25 region seems most closely related to the 6p21.3 MHC region, as it is only the MHC paralogous region that includes bona fide MHC class I genes, the CD1 and MR1 loci. Here, to clarify the genomic structure of this model MHC paralogous region as well as to gain insight into the evolutionary dynamics of the entire quadriplication process, a detailed analysis of a critical 1.7 megabase (Mb) region was performed. To this end, a composite, deep, YAC, BAC, and PAC contig encompassing all five CD1 genes and linking the centromeric +P5 locus to the telomeric KRTC7 locus was constructed. Within this contig a 1.1-Mb BAC and PAC core segment joining CD1D to FCER1A was fully sequenced and thoroughly analyzed. This led to the mapping of a total of 41 genes (12 expressed genes, 12 possibly expressed genes, and 17 pseudogenes), among which 31 were novel. The latter include 20 olfactory receptor (OR) genes, 9 of which are potentially expressed. Importantly, CD1, SPTA1, OR, and FCERIA belong to multigene families, which have paralogues in the other three regions. Furthermore, it is noteworthy that 12 of the 13 expressed genes in the 1q21–q22 region around the CD1 loci are immunologically relevant. In addition to CD1A-E, these include SPTA1, MNDA, IFI-16, AIM2, BL1A, FY and FCERIA. This functional convergence of structurally unrelated genes is reminiscent of the 6p MHC region, and perhaps represents the emergence of yet another antigen presentation gene cluster, in this case dedicated to lipid/glycolipid antigens rather than antigen-derived peptides. [The nucleotide sequence data reported in this paper have been submitted to the DDBJ, EMBL, and GenBank databases under

  11. A crucial role of paralogous β-defensin genes in the Chinese alligator innate immune system revealed by the first determination of a Crocodilia defensin cluster.

    Science.gov (United States)

    Tang, Ke-Yi; Wang, Xin; Wan, Qiu-Hong; Fang, Sheng-Guo

    2018-04-01

    The β-defensin, one of the antimicrobial peptides (AMPs), is a significant component of the innate immune with a broad range of antimicrobial activities. Differing from the widely-studied mammals and birds, limited information about β-defensins has been reported in reptiles, especially in crocodilians. As a same ancient species as dinosaurs and the most endangered species of 23 crocodilians, the survival of Chinese alligator (Alligator sinensis) means a powerful immune system and possible involvement of AMPs in its immune resistance. In this study, we identified 20 novel Alligator sinensisβ-defensin genes (AsBDs) from a 390 kb region using bioinformatic and experimental approaches, and successfully distinguished six orthologous AsBDs to birds and nine paralogous AsBDs undergoing gene duplication events. The amino acid alignment shows that the AsBD paralogs, like α-defensins, encode a significantly longer pro-piece comparing with the orthologs. The calculation of non-synonymous (d N ) and synonymous (d S ) substitutions in the mature peptide reveals that the AsBD paralogs experience a significantly higher selective pressure (d N /d S ) than the orthologs, but a similar evolutionary force to α-defensins. The gene expression result indicates that the AsBD paralogs have a significantly higher expression level than the orthologos in gastrointestinal tract where the host is vulnerable to enteric pathogenic bacteria, as observed in α-defensins. These three pieces of evidence demonstrate that the AsBD paralogs do play an important role in maintaining long-term survival of this endangered reptile. Thus, this survey of AsBDs on the genomic structure, evolutionary characteristics, and expression pattern provides a genetic and immunological foundation for further investigating their antimicrobial function and alternative antibiotics potentiality. Copyright © 2017 The Authors. Published by Elsevier Ltd.. All rights reserved.

  12. Os direitos humanos e a política internacional

    Directory of Open Access Journals (Sweden)

    Rossana Rocha Reis

    2006-11-01

    Full Text Available O artigo trata da questão do crescente reconhecimento internacional dos direitos humanos desde o fim da II Guerra Mundial e discute os efeitos desse processo sobre a política internacional. De modo geral os argumentos sobre o papel dos direitos humanos na política internacional dividem-se entre os que acham que eles não passam de retórica para encobrir interesses particulares, e os que enxergam na sua afirmação um potencial transformador da ordem internacional. No contexto atual,em que se discute a adoção de mecanismos coercitivos mais fortes para a proteção dos direitos humanos, como as intervenções humanitárias, por exemplo, essa discussão torna-se mais complexa e mais urgente.

  13. Nature of the Nucleosomal Barrier to RNA Polymerase II | Center for Cancer Research

    Science.gov (United States)

    In the cell, RNA polymerase II (pol II) efficiently transcribes DNA packaged into nucleosomes, but in vitro encounters with the nucleosomes induce catalytic inactivation (arrest) of the pol II core enzyme. To determine potential mechanisms making nucleosomes transparent to transcription in vivo, we analyzed the nature of the nucleosome-induced arrest. We found that the arrests

  14. Unidad 4: Crear Polígonos

    OpenAIRE

    Gómez Trigueros, Isabel María

    2015-01-01

    En esta unidad aprenderéis a crear vuestros propios polígonos con Google Earth para delimitar un área geográfica. Podréis modificar el tamaño de los polígonos, el color del área y su perímetro, incluso elaborar polígonos en 3D para superponer distintas variables sobre un paisaje concreto.

  15. Sangres políticas

    Directory of Open Access Journals (Sweden)

    Gabriel Gatti

    2018-03-01

    Full Text Available Trabajamos en las tensiones entre dos continentes en permanente disputa: “sangre” y “política”, “realidad” y “dispositivo”, “naturaleza” y “cultura”. Son viejos asuntos, y viejas tensiones, pero que no dejan de actualizarse y que ahora se manifiestan por doquier en cuestiones como la biometría, los mapas genéticos, la identificación de desaparecidos, las políticas de la identidad indígena o de género o de menores o de drogas, la gestación subrogada o la gestión de la marginalidad. Los diez textos recogidos en este número especial discuten desde una mirada interdisciplinaria sobre la presencia de la sangre —en sus distintas declinaciones— en la definición contemporánea de lo que entendemos por identidad, derechos humanos o ciudadanía.

  16. Functional studies of heading date-related gene TaPRR73, a paralog of Ppd1 in common wheat

    Directory of Open Access Journals (Sweden)

    Wenping eZhang

    2016-06-01

    Full Text Available Photoperiod response-related genes play a crucial role in duration of the plant growth. In this study, we focused on TaPRR73, a paralog of Green Revolution gene Ppd1 (TaPRR37. We found that overexpression of the truncated TaPRR73 form lacking part of the N-terminal PR domain in transgenic rice promoted heading under long day conditions. Association analysis in common wheat verified that TaPRR73 was an important agronomic photoperiod response gene that significantly affected heading date and plant height; expression analysis proved that specific alleles of TaPRR73-A1 had highly expressed levels in earlier heading lines; the distribution of haplotypes indicated that one of these alleles had been selected in breeding programs. Our results demonstrated that TaPRR73 contributed to regulation of heading date in wheat and could be useful in wheat breeding and in broadening adaptation of the crop to new regions.

  17. Paralogous SQUAMOSA PROMOTER BINDING PROTEIN-LIKE (SPL) genes differentially regulate leaf initiation and reproductive phase change in petunia.

    Science.gov (United States)

    Preston, Jill C; Jorgensen, Stacy A; Orozco, Rebecca; Hileman, Lena C

    2016-02-01

    Duplicated petunia clade-VI SPL genes differentially promote the timing of inflorescence and flower development, and leaf initiation rate. The timing of plant reproduction relative to favorable environmental conditions is a critical component of plant fitness, and is often associated with variation in plant architecture and habit. Recent studies have shown that overexpression of the microRNA miR156 in distantly related annual species results in plants with perennial characteristics, including late flowering, weak apical dominance, and abundant leaf production. These phenotypes are largely mediated through the negative regulation of a subset of genes belonging to the SQUAMOSA PROMOTER BINDING PROTEIN-LIKE (SPL) family of transcription factors. In order to determine how and to what extent paralogous SPL genes have partitioned their roles in plant growth and development, we functionally characterized petunia clade-VI SPL genes under different environmental conditions. Our results demonstrate that PhSBP1and PhSBP2 differentially promote discrete stages of the reproductive transition, and that PhSBP1, and possibly PhCNR, accelerates leaf initiation rate. In contrast to the closest homologs in annual Arabidopsis thaliana and Mimulus guttatus, PhSBP1 and PhSBP2 transcription is not mediated by the gibberellic acid pathway, but is positively correlated with photoperiod and developmental age. The developmental functions of clade-VI SPL genes have, thus, evolved following both gene duplication and speciation within the core eudicots, likely through differential regulation and incomplete sub-functionalization.

  18. ZP Domain Proteins in the Abalone Egg Coat Include a Paralog of VERL under Positive Selection That Binds Lysin and 18-kDa Sperm Proteins

    Science.gov (United States)

    Aagaard, Jan E.; Vacquier, Victor D.; MacCoss, Michael J.; Swanson, Willie J.

    2010-01-01

    Identifying fertilization molecules is key to our understanding of reproductive biology, yet only a few examples of interacting sperm and egg proteins are known. One of the best characterized comes from the invertebrate archeogastropod abalone (Haliotis spp.), where sperm lysin mediates passage through the protective egg vitelline envelope (VE) by binding to the VE protein vitelline envelope receptor for lysin (VERL). Rapid adaptive divergence of abalone lysin and VERL are an example of positive selection on interacting fertilization proteins contributing to reproductive isolation. Previously, we characterized a subset of the abalone VE proteins that share a structural feature, the zona pellucida (ZP) domain, which is common to VERL and the egg envelopes of vertebrates. Here, we use additional expressed sequence tag sequencing and shotgun proteomics to characterize this family of proteins in the abalone egg VE. We expand 3-fold the number of known ZP domain proteins present within the VE (now 30 in total) and identify a paralog of VERL (vitelline envelope zona pellucida domain protein [VEZP] 14) that contains a putative lysin-binding motif. We find that, like VERL, the divergence of VEZP14 among abalone species is driven by positive selection on the lysin-binding motif alone and that these paralogous egg VE proteins bind a similar set of sperm proteins including a rapidly evolving 18-kDa paralog of lysin, which may mediate sperm–egg fusion. This work identifies an egg coat paralog of VERL under positive selection and the candidate sperm proteins with which it may interact during abalone fertilization. PMID:19767347

  19. Transcriptional start site turnover in the evolution of bacterial paralogous genes - the pelE-pelD virulence genes in Dickeya.

    Science.gov (United States)

    Duprey, Alexandre; Nasser, William; Léonard, Simon; Brochier-Armanet, Céline; Reverchon, Sylvie

    2016-11-01

    After a gene duplication event, the resulting paralogous genes frequently acquire distinct expression profiles, roles, and/or functions but the underlying mechanisms are poorly understood. While transcription start site (TSS) turnover, i.e., the repositioning of the TSS during evolution, is widespread in eukaryotes, it is less documented in bacteria. Using pelD and pelE, two closely related paralogous genes encoding key virulence factors in Dickeya, a gamma proteobacterial genus of phytopathogens, we show that pelE has been selected as an initiator of bacterial aggression, while pelD acts at a later stage, thanks to modifications in the transcriptional regulation of these two genes. This expression change is linked to a few mutations that caused a shift in the position of the pelETSS and the rapid divergence in the regulation of these genes after their duplication. Genomic surveys detected additional examples of putative turnovers in other bacteria. This first report of TSS shifting in bacteria suggests that this mechanism could play a major role in paralogous genes fixation in prokaryotes. © 2016 Federation of European Biochemical Societies.

  20. Política, marketing e neoliberalismo

    Directory of Open Access Journals (Sweden)

    Pedro Roberto Ferreira

    2004-07-01

    Full Text Available O texto contém uma análise da relação política e sua possível consciência no seu momento específico compreendido pelo processo eleitoral (Londrina - eleições 92. Como este processo eleitoral em nossos dias, nutre-se de algumas técnicas conhecidas como Marketing Político-Eleitoral, e de como estas, contribuem para uma dinâmica de esvaziamento da vida política propriamente dita. Procura ainda, conectar esse esvaziamento político e suas consequências, com o avanço da concepção neoliberal cujo ápice parece fazer coincidir a política como mais uma manifestação de Mercado.

  1. Relationship between RNA polymerase II and efficiency of vaccinia virus replication

    International Nuclear Information System (INIS)

    Wilton, S.; Dales, S.

    1989-01-01

    It is clear from previous studies that host transcriptase or RNA polymerase II (pol II) has a role in poxvirus replication. To elucidate the participation of this enzyme further, in this study the authors examined several parameters related to pol II during the cycle of vaccinia virus infection in L-strain fibroblasts, HeLa cells, and L 6 H 9 rat myoblasts. Nucleocytoplasmic transposition of pol II into virus factories and virions was assessed by immunofluorescence and immunoblotting by using anti-pol II immunoglobulin G. RNA polymerase activities were compared in nuclear extracts containing cured enzyme preparations. Rates of translation into cellular or viral polypeptides were ascertained by labeling with [ 35 S]methionine. In L and HeLa cells, which produced vaccinia virus more abundantly, the rate of RNA polymerase and translation in controls and following infection were higher than in myoblasts. The data on synthesis and virus formation could be correlated with observations on transmigration of pol II, which was more efficient and complete in L and HeLa cells. The stimulus for pol II to leave the nucleus required the expression of both early and late viral functions. On the basis of current and past information, the authors suggest that mobilization of pol II depends on the efficiency of vaccinia virus replication and furthermore that control over vaccinia virus production by the host is related to the content or availability (or both) of pol II in different cell types

  2. Edad y cultura política

    Directory of Open Access Journals (Sweden)

    MANUEL JUSTEL

    1992-01-01

    Full Text Available En este artículo se analiza la evolución de algunos aspectos de la cultura política y democrática durante los años ochenta: información y competencia política, participación política, actitudes hacia los partidos y orientaciones políticas. Los datos proceden de sendas encuestas realizadas en 1980 y 1989. Mediante análisis de cohortes de edad, controlando sexo y nivel de estudios, se comprueba el grado diferencial de expansión de actitudes democráticas en los grupos de edad, controlando sexo y nivel de estudios, se comprueba el grado diferencial de expansión de actitudes democráticas en los grupos de edad, el efecto homogeneizador que conlleva y el influjo estratégico de la educación. En el marco teórico de la socialización política en edad adulta y de las relaciones entre sistema social y sistema político, se interpretan los cambios de actitudes distinguiendo efectos de ciclo vital, de cohorte y de periodo. Al mismo tiempo, se discuten algunas consecuencias políticas del envejecimiento poblacional y se constata de un grado notable de plasticidad actitudinal y de adhesión creciente a la democracia de las cohortes de edad avanzada.

  3. Human 14-3-3 paralogs differences uncovered by cross-talk of phosphorylation and lysine acetylation.

    Directory of Open Access Journals (Sweden)

    Marina Uhart

    Full Text Available The 14-3-3 protein family interacts with more than 700 different proteins in mammals, in part as a result of its specific phospho-serine/phospho-threonine binding activity. Upon binding to 14-3-3, the stability, subcellular localization and/or catalytic activity of the ligands are modified. Seven paralogs are strictly conserved in mammalian species. Although initially thought as redundant, the number of studies showing specialization is growing. We created a protein-protein interaction network for 14-3-3, kinases and their substrates signaling in human cells. We included information of phosphorylation, acetylation and other PTM sites, obtaining a complete representation of the 14-3-3 binding partners and their modifications. Using a computational system approach we found that networks of each 14-3-3 isoform are statistically different. It was remarkable to find that Tyr was the most phosphorylatable amino acid in domains of 14-3-3 epsilon partners. This, together with the over-representation of SH3 and Tyr_Kinase domains, suggest that epsilon could be involved in growth factors receptors signaling pathways particularly. We also found that within zeta's network, the number of acetylated partners (and the number of modify lysines is significantly higher compared with each of the other isoforms. Our results imply previously unreported hidden differences of the 14-3-3 isoforms interaction networks. The phosphoproteome and lysine acetylome within each network revealed post-transcriptional regulation intertwining phosphorylation and lysine acetylation. A global understanding of these networks will contribute to predict what could occur when regulatory circuits become dysfunctional or are modified in response to external stimuli.

  4. SP Transcription Factor Paralogs and DNA-Binding Sites Coevolve and Adaptively Converge in Mammals and Birds

    Science.gov (United States)

    Yokoyama, Ken Daigoro; Pollock, David D.

    2012-01-01

    Functional modification of regulatory proteins can affect hundreds of genes throughout the genome, and is therefore thought to be almost universally deleterious. This belief, however, has recently been challenged. A potential example comes from transcription factor SP1, for which statistical evidence indicates that motif preferences were altered in eutherian mammals. Here, we set out to discover possible structural and theoretical explanations, evaluate the role of selection in SP1 evolution, and discover effects on coregulatory proteins. We show that SP1 motif preferences were convergently altered in birds as well as mammals, inducing coevolutionary changes in over 800 regulatory regions. Structural and phylogenic evidence implicates a single causative amino acid replacement at the same SP1 position along both lineages. Furthermore, paralogs SP3 and SP4, which coregulate SP1 target genes through competitive binding to the same sites, have accumulated convergent replacements at the homologous position multiple times during eutherian and bird evolution, presumably to preserve competitive binding. To determine plausibility, we developed and implemented a simple model of transcription factor and binding site coevolution. This model predicts that, in contrast to prevailing beliefs, even small selective benefits per locus can drive concurrent fixation of transcription factor and binding site mutants under a broad range of conditions. Novel binding sites tend to arise de novo, rather than by mutation from ancestral sites, a prediction substantiated by SP1-binding site alignments. Thus, multiple lines of evidence indicate that selection has driven convergent evolution of transcription factors along with their binding sites and coregulatory proteins. PMID:23019068

  5. Divergent nuclear 18S rDNA paralogs in a turkey coccidium, Eimeria meleagrimitis, complicate molecular systematics and identification.

    Science.gov (United States)

    El-Sherry, Shiem; Ogedengbe, Mosun E; Hafeez, Mian A; Barta, John R

    2013-07-01

    Multiple 18S rDNA sequences were obtained from two single-oocyst-derived lines of each of Eimeria meleagrimitis and Eimeria adenoeides. After analysing the 15 new 18S rDNA sequences from two lines of E. meleagrimitis and 17 new sequences from two lines of E. adenoeides, there were clear indications that divergent, paralogous 18S rDNA copies existed within the nuclear genome of E. meleagrimitis. In contrast, mitochondrial cytochrome c oxidase subunit I (COI) partial sequences from all lines of a particular Eimeria sp. were identical and, in phylogenetic analyses, COI sequences clustered unambiguously in monophyletic and highly-supported clades specific to individual Eimeria sp. Phylogenetic analysis of the new 18S rDNA sequences from E. meleagrimitis showed that they formed two distinct clades: Type A with four new sequences; and Type B with nine new sequences; both Types A and B sequences were obtained from each of the single-oocyst-derived lines of E. meleagrimitis. Together these rDNA types formed a well-supported E. meleagrimitis clade. Types A and B 18S rDNA sequences from E. meleagrimitis had a mean sequence identity of only 97.4% whereas mean sequence identity within types was 99.1-99.3%. The observed intraspecific sequence divergence among E. meleagrimitis 18S rDNA sequence types was even higher (approximately 2.6%) than the interspecific sequence divergence present between some well-recognized species such as Eimeria tenella and Eimeria necatrix (1.1%). Our observations suggest that, unlike COI sequences, 18S rDNA sequences are not reliable molecular markers to be used alone for species identification with coccidia, although 18S rDNA sequences have clear utility for phylogenetic reconstruction of apicomplexan parasites at the genus and higher taxonomic ranks. Copyright © 2013. Published by Elsevier Ltd.

  6. On the Use of Gene Ontology Annotations to Assess Functional Similarity among Orthologs and Paralogs: A Short Report.

    Directory of Open Access Journals (Sweden)

    Paul D Thomas

    Full Text Available A recent paper (Nehrt et al., PLoS Comput. Biol. 7:e1002073, 2011 has proposed a metric for the "functional similarity" between two genes that uses only the Gene Ontology (GO annotations directly derived from published experimental results. Applying this metric, the authors concluded that paralogous genes within the mouse genome or the human genome are more functionally similar on average than orthologous genes between these genomes, an unexpected result with broad implications if true. We suggest, based on both theoretical and empirical considerations, that this proposed metric should not be interpreted as a functional similarity, and therefore cannot be used to support any conclusions about the "ortholog conjecture" (or, more properly, the "ortholog functional conservation hypothesis". First, we reexamine the case studies presented by Nehrt et al. as examples of orthologs with divergent functions, and come to a very different conclusion: they actually exemplify how GO annotations for orthologous genes provide complementary information about conserved biological functions. We then show that there is a global ascertainment bias in the experiment-based GO annotations for human and mouse genes: particular types of experiments tend to be performed in different model organisms. We conclude that the reported statistical differences in annotations between pairs of orthologous genes do not reflect differences in biological function, but rather complementarity in experimental approaches. Our results underscore two general considerations for researchers proposing novel types of analysis based on the GO: 1 that GO annotations are often incomplete, potentially in a biased manner, and subject to an "open world assumption" (absence of an annotation does not imply absence of a function, and 2 that conclusions drawn from a novel, large-scale GO analysis should whenever possible be supported by careful, in-depth examination of examples, to help ensure the

  7. Expression Pattern of Two Paralogs Encoding Cinnamyl Alcohol Dehydrogenases in Arabidopsis. Isolation and Characterization of the Corresponding Mutants1

    Science.gov (United States)

    Sibout, Richard; Eudes, Aymerick; Pollet, Brigitte; Goujon, Thomas; Mila, Isabelle; Granier, Fabienne; Séguin, Armand; Lapierre, Catherine; Jouanin, Lise

    2003-01-01

    Studying Arabidopsis mutants of the phenylpropanoid pathway has unraveled several biosynthetic steps of monolignol synthesis. Most of the genes leading to monolignol synthesis have been characterized recently in this herbaceous plant, except those encoding cinnamyl alcohol dehydrogenase (CAD). We have used the complete sequencing of the Arabidopsis genome to highlight a new view of the complete CAD gene family. Among nine AtCAD genes, we have identified the two distinct paralogs AtCAD-C and AtCAD-D, which share 75% identity and are likely to be involved in lignin biosynthesis in other plants. Northern, semiquantitative restriction fragment-length polymorphism-reverse transcriptase-polymerase chain reaction and western analysis revealed that AtCAD-C and AtCAD-D mRNA and protein ratios were organ dependent. Promoter activities of both genes are high in fibers and in xylem bundles. However, AtCAD-C displayed a larger range of sites of expression than AtCAD-D. Arabidopsis null mutants (Atcad-D and Atcad-C) corresponding to both genes were isolated. CAD activities were drastically reduced in both mutants, with a higher impact on sinapyl alcohol dehydrogenase activity (6% and 38% of residual sinapyl alcohol dehydrogenase activities for Atcad-D and Atcad-C, respectively). Only Atcad-D showed a slight reduction in Klason lignin content and displayed modifications of lignin structure with a significant reduced proportion of conventional S lignin units in both stems and roots, together with the incorporation of sinapaldehyde structures ether linked at Cβ. These results argue for a substantial role of AtCAD-D in lignification, and more specifically in the biosynthesis of sinapyl alcohol, the precursor of S lignin units. PMID:12805615

  8. Expression pattern of two paralogs encoding cinnamyl alcohol dehydrogenases in Arabidopsis. Isolation and characterization of the corresponding mutants.

    Science.gov (United States)

    Sibout, Richard; Eudes, Aymerick; Pollet, Brigitte; Goujon, Thomas; Mila, Isabelle; Granier, Fabienne; Séguin, Armand; Lapierre, Catherine; Jouanin, Lise

    2003-06-01

    Studying Arabidopsis mutants of the phenylpropanoid pathway has unraveled several biosynthetic steps of monolignol synthesis. Most of the genes leading to monolignol synthesis have been characterized recently in this herbaceous plant, except those encoding cinnamyl alcohol dehydrogenase (CAD). We have used the complete sequencing of the Arabidopsis genome to highlight a new view of the complete CAD gene family. Among nine AtCAD genes, we have identified the two distinct paralogs AtCAD-C and AtCAD-D, which share 75% identity and are likely to be involved in lignin biosynthesis in other plants. Northern, semiquantitative restriction fragment-length polymorphism-reverse transcriptase-polymerase chain reaction and western analysis revealed that AtCAD-C and AtCAD-D mRNA and protein ratios were organ dependent. Promoter activities of both genes are high in fibers and in xylem bundles. However, AtCAD-C displayed a larger range of sites of expression than AtCAD-D. Arabidopsis null mutants (Atcad-D and Atcad-C) corresponding to both genes were isolated. CAD activities were drastically reduced in both mutants, with a higher impact on sinapyl alcohol dehydrogenase activity (6% and 38% of residual sinapyl alcohol dehydrogenase activities for Atcad-D and Atcad-C, respectively). Only Atcad-D showed a slight reduction in Klason lignin content and displayed modifications of lignin structure with a significant reduced proportion of conventional S lignin units in both stems and roots, together with the incorporation of sinapaldehyde structures ether linked at Cbeta. These results argue for a substantial role of AtCAD-D in lignification, and more specifically in the biosynthesis of sinapyl alcohol, the precursor of S lignin units.

  9. Conservation of σ28-Dependent Non-Coding RNA Paralogs and Predicted σ54-Dependent Targets in Thermophilic Campylobacter Species.

    Directory of Open Access Journals (Sweden)

    My Thanh Le

    Full Text Available Assembly of flagella requires strict hierarchical and temporal control via flagellar sigma and anti-sigma factors, regulatory proteins and the assembly complex itself, but to date non-coding RNAs (ncRNAs have not been described to regulate genes directly involved in flagellar assembly. In this study we have investigated the possible role of two ncRNA paralogs (CjNC1, CjNC4 in flagellar assembly and gene regulation of the diarrhoeal pathogen Campylobacter jejuni. CjNC1 and CjNC4 are 37/44 nt identical and predicted to target the 5' untranslated region (5' UTR of genes transcribed from the flagellar sigma factor σ54. Orthologs of the σ54-dependent 5' UTRs and ncRNAs are present in the genomes of other thermophilic Campylobacter species, and transcription of CjNC1 and CNC4 is dependent on the flagellar sigma factor σ28. Surprisingly, inactivation and overexpression of CjNC1 and CjNC4 did not affect growth, motility or flagella-associated phenotypes such as autoagglutination. However, CjNC1 and CjNC4 were able to mediate sequence-dependent, but Hfq-independent, partial repression of fluorescence of predicted target 5' UTRs in an Escherichia coli-based GFP reporter gene system. This hints towards a subtle role for the CjNC1 and CjNC4 ncRNAs in post-transcriptional gene regulation in thermophilic Campylobacter species, and suggests that the currently used phenotypic methodologies are insufficiently sensitive to detect such subtle phenotypes. The lack of a role of Hfq in the E. coli GFP-based system indicates that the CjNC1 and CjNC4 ncRNAs may mediate post-transcriptional gene regulation in ways that do not conform to the paradigms obtained from the Enterobacteriaceae.

  10. Conservation of σ28-Dependent Non-Coding RNA Paralogs and Predicted σ54-Dependent Targets in Thermophilic Campylobacter Species

    Science.gov (United States)

    Le, My Thanh; van Veldhuizen, Mart; Porcelli, Ida; Bongaerts, Roy J.; Gaskin, Duncan J. H.; Pearson, Bruce M.; van Vliet, Arnoud H. M.

    2015-01-01

    Assembly of flagella requires strict hierarchical and temporal control via flagellar sigma and anti-sigma factors, regulatory proteins and the assembly complex itself, but to date non-coding RNAs (ncRNAs) have not been described to regulate genes directly involved in flagellar assembly. In this study we have investigated the possible role of two ncRNA paralogs (CjNC1, CjNC4) in flagellar assembly and gene regulation of the diarrhoeal pathogen Campylobacter jejuni. CjNC1 and CjNC4 are 37/44 nt identical and predicted to target the 5' untranslated region (5' UTR) of genes transcribed from the flagellar sigma factor σ54. Orthologs of the σ54-dependent 5' UTRs and ncRNAs are present in the genomes of other thermophilic Campylobacter species, and transcription of CjNC1 and CNC4 is dependent on the flagellar sigma factor σ28. Surprisingly, inactivation and overexpression of CjNC1 and CjNC4 did not affect growth, motility or flagella-associated phenotypes such as autoagglutination. However, CjNC1 and CjNC4 were able to mediate sequence-dependent, but Hfq-independent, partial repression of fluorescence of predicted target 5' UTRs in an Escherichia coli-based GFP reporter gene system. This hints towards a subtle role for the CjNC1 and CjNC4 ncRNAs in post-transcriptional gene regulation in thermophilic Campylobacter species, and suggests that the currently used phenotypic methodologies are insufficiently sensitive to detect such subtle phenotypes. The lack of a role of Hfq in the E. coli GFP-based system indicates that the CjNC1 and CjNC4 ncRNAs may mediate post-transcriptional gene regulation in ways that do not conform to the paradigms obtained from the Enterobacteriaceae. PMID:26512728

  11. Observatorio de Política Internacional I. COLOMBIA - Una paz esquiva

    OpenAIRE

    Neira Fernández, Enrique

    2007-01-01

    Observatorio de Política Internacional I. COLOMBIA (Neira Fernández, Enrique) RECIENTES Año 2008 Colombia. Cerca el fin del paramilitarismo Colombia. Cerca el fin de las Farc Colombia. Conflicto armado y desarrollo humano Colombia. Política exterior Colombia. Inicia el 2008 con buen pie Año 2007 Colombia. Tras las pasadas elecciones Colombia. El espectro de las próximas elecciones Colombia. La garrocha de Uribe Colombia. III Parapolíticos Colombia. II...

  12. Observatorio de Política Internacional I. COLOMBIA - Una nueva estrategia de paz

    OpenAIRE

    Neira Fernández, Enrique

    2007-01-01

    Observatorio de Política Internacional I. COLOMBIA (Neira Fernández, Enrique) RECIENTES Año 2008 Colombia. Cerca el fin del paramilitarismo Colombia. Cerca el fin de las Farc Colombia. Conflicto armado y desarrollo humano Colombia. Política exterior Colombia. Inicia el 2008 con buen pie Año 2007 Colombia. Tras las pasadas elecciones Colombia. El espectro de las próximas elecciones Colombia. La garrocha de Uribe Colombia. III Parapolíticos Colombia. II...

  13. Observatorio de Política Internacional I. COLOMBIA - Una paz secuestrada

    OpenAIRE

    Neira Fernández, Enrique

    2007-01-01

    Observatorio de Política Internacional I. COLOMBIA (Neira Fernández, Enrique) RECIENTES Año 2008 Colombia. Cerca el fin del paramilitarismo Colombia. Cerca el fin de las Farc Colombia. Conflicto armado y desarrollo humano Colombia. Política exterior Colombia. Inicia el 2008 con buen pie Año 2007 Colombia. Tras las pasadas elecciones Colombia. El espectro de las próximas elecciones Colombia. La garrocha de Uribe Colombia. III Parapolíticos Colombia. II...

  14. Observatorio de Política Internacional I. COLOMBIA - Los momentos de la paz

    OpenAIRE

    Neira Fernández, Enrique

    2012-01-01

    Observatorio de Política Internacional I. COLOMBIA (Neira Fernández, Enrique) RECIENTES Año 2008 Colombia. Cerca el fin del paramilitarismo Colombia. Cerca el fin de las Farc Colombia. Conflicto armado y desarrollo humano Colombia. Política exterior Colombia. Inicia el 2008 con buen pie Año 2007 Colombia. Tras las pasadas elecciones Colombia. El espectro de las próximas elecciones Colombia. La garrocha de Uribe Colombia. III Parapolíticos Colombia. II...

  15. Observatorio de Política Internacional I. COLOMBIA - Siempre es tarde para la paz

    OpenAIRE

    Neira Fernández, Enrique

    2007-01-01

    Observatorio de Política Internacional I. COLOMBIA (Neira Fernández, Enrique) RECIENTES Año 2008 Colombia. Cerca el fin del paramilitarismo Colombia. Cerca el fin de las Farc Colombia. Conflicto armado y desarrollo humano Colombia. Política exterior Colombia. Inicia el 2008 con buen pie Año 2007 Colombia. Tras las pasadas elecciones Colombia. El espectro de las próximas elecciones Colombia. La garrocha de Uribe Colombia. III Parapolíticos Colombia. II...

  16. Observatorio de Política Internacional I. COLOMBIA - Viraje en el proceso de paz

    OpenAIRE

    Neira Fernández, Enrique

    2007-01-01

    Observatorio de Política Internacional I. COLOMBIA (Neira Fernández, Enrique) RECIENTES Año 2008 Colombia. Cerca el fin del paramilitarismo Colombia. Cerca el fin de las Farc Colombia. Conflicto armado y desarrollo humano Colombia. Política exterior Colombia. Inicia el 2008 con buen pie Año 2007 Colombia. Tras las pasadas elecciones Colombia. El espectro de las próximas elecciones Colombia. La garrocha de Uribe Colombia. III Parapolíticos Colombia. II...

  17. Fuels and Petroleum, Oil & Lubricants (POL) Laboratories

    Data.gov (United States)

    Federal Laboratory Consortium — The Fuels and Lubricants Technology Team operates and maintains the Fuels and POL Labs at TARDEC. Lab experts adhere to standardized American Society for Testing and...

  18. Ionizing radiation-induced foci formation of mammalian Rad51 and Rad54 depends on the Rad51 paralogs, but not on Rad52

    International Nuclear Information System (INIS)

    Veelen, Lieneke R. van; Essers, Jeroen; Rakt, Mandy W.M.M. van de; Odijk, Hanny; Pastink, Albert; Zdzienicka, MaIgorzata Z.; Paulusma, Coen C.; Kanaar, Roland

    2005-01-01

    Homologous recombination is of major importance for the prevention of genomic instability during chromosome duplication and repair of DNA damage, especially double-strand breaks. Biochemical experiments have revealed that during the process of homologous recombination the RAD52 group proteins, including Rad51, Rad52 and Rad54, are involved in an essential step: formation of a joint molecule between the broken DNA and the intact repair template. Accessory proteins for this reaction include the Rad51 paralogs and BRCA2. The significance of homologous recombination for the cell is underscored by the evolutionary conservation of the Rad51, Rad52 and Rad54 proteins from yeast to humans. Upon treatment of cells with ionizing radiation, the RAD52 group proteins accumulate at the sites of DNA damage into so-called foci. For the yeast Saccharomyces cerevisiae, foci formation of Rad51 and Rad54 is abrogated in the absence of Rad52, while Rad51 foci formation does occur in the absence of the Rad51 paralog Rad55. By contrast, we show here that in mammalian cells, Rad52 is not required for foci formation of Rad51 and Rad54. Furthermore, radiation-induced foci formation of Rad51 and Rad54 is impaired in all Rad51 paralog and BRCA2 mutant cell lines tested, while Rad52 foci formation is not influenced by a mutation in any of these recombination proteins. Despite their evolutionary conservation and biochemical similarities, S. cerevisiae and mammalian Rad52 appear to differentially contribute to the DNA-damage response

  19. Molecular characterization of BrMYB28 and BrMYB29 paralogous transcription factors involved in the regulation of aliphatic glucosinolate profiles in Brassica rapa ssp. pekinensis.

    Science.gov (United States)

    Baskar, Venkidasamy; Park, Se Won

    2015-07-01

    Glucosinolates (GSL) are one of the major secondary metabolites of the Brassicaceae family. In the present study, we aim at characterizing the multiple paralogs of aliphatic GSL regulators, such as BrMYB28 and BrMYB29 genes in Brassica rapa ssp. pekinensis, by quantitative real-time PCR (qRT-PCR) analysis in different tissues and at various developmental stages. An overlapping gene expression pattern between the BrMYBs as well as their downstream genes (DSGs) was found at different developmental stages. Among the BrMYB28 and BrMYB29 paralogous genes, the BrMYB28.3 and BrMYB29.1 genes were dominantly expressed in most of the developmental stages, compared to the other paralogs of the BrMYB genes. Furthermore, the differential expression pattern of the BrMYBs was observed under various stress treatments. Interestingly, BrMYB28.2 showed the least expression in most developmental stages, while its expression was remarkably high in different stress conditions. More specifically, the BrMYB28.2, BrMYB28.3, and BrMYB29.1 genes were highly responsive to various abiotic and biotic stresses, further indicating their possible role in stress tolerance. Moreover, the in silico cis motif analysis in the upstream regulatory regions of BrMYBs showed the presence of various putative stress-specific motifs, which further indicated their responsiveness to biotic and abiotic stresses. These observations suggest that the dominantly expressed BrMYBs, both in different developmental stages and under various stress treatments (BrMYB28.3 and BrMYB29.1), may be potential candidate genes for altering the GSL level through genetic modification studies in B. rapa ssp. pekinensis. Copyright © 2015. Published by Elsevier SAS.

  20. On Paralogic Practices

    DEFF Research Database (Denmark)

    Søndergaard, Morten

    2017-01-01

    Whereas Metro-net is a personal and very direct artistic response to the internet as the metaphor of the information terminals of decentralized globalization, All that is Solid Melts Into Data is an almost clinical dissection of the material effects of data (and by inference, the internet...... at how these two concepts actually materialize in the spheres of post-internet citizens. Underneath the dissent and antagonistic attitudes, practices such as these aim to establishing a new, other logic—a para-logic—of things in the culture of ubiquitous information....

  1. From Anomaly to Paralogy

    DEFF Research Database (Denmark)

    Christensen, Ole Ravn; Børsen, Tom

    2009-01-01

    transcend the traditional disciplinary borders of the classical scientific disciplines, so that we see how core knowledge from the old sciences like physics, chemistry, biology, mathematics etc. are mixed with each other and sometimes with humanistic disciplines and social sciences. With the new study...

  2. Zebrafish brd2a and brd2b are paralogous members of the bromodomain-ET (BET family of transcriptional coregulators that show structural and expression divergence

    Directory of Open Access Journals (Sweden)

    Bee Katharine J

    2008-04-01

    Full Text Available Abstract Background Brd2 belongs to the bromodomain-extraterminal domain (BET family of transcriptional co-regulators, and functions as a pivotal histone-directed recruitment scaffold in chromatin modification complexes affecting signal-dependent transcription. Brd2 facilitates expression of genes promoting proliferation and is implicated in apoptosis and in egg maturation and meiotic competence in mammals; it is also a susceptibility gene for juvenile myoclonic epilepsy (JME in humans. The brd2 ortholog in Drosophila is a maternal effect, embryonic lethal gene that regulates several homeotic loci, including Ultrabithorax. Despite its importance, there are few systematic studies of Brd2 developmental expression in any organism. To help elucidate both conserved and novel gene functions, we cloned and characterized expression of brd2 cDNAs in zebrafish, a vertebrate system useful for genetic analysis of development and disease, and for study of the evolution of gene families and functional diversity in chordates. Results We identify cDNAs representing two paralogous brd2 loci in zebrafish, brd2a on chromosome 19 and brd2b on chromosome 16. By sequence similarity, syntenic and phylogenetic analyses, we present evidence for structural divergence of brd2 after gene duplication in fishes. brd2 paralogs show potential for modular domain combinations, and exhibit distinct RNA expression patterns throughout development. RNA in situ hybridizations in oocytes and embryos implicate brd2a and brd2b as maternal effect genes involved in egg polarity and egg to embryo transition, and as zygotic genes important for development of the vertebrate nervous system and for morphogenesis and differentiation of the digestive tract. Patterns of brd2 developmental expression in zebrafish are consistent with its proposed role in Homeobox gene regulation. Conclusion Expression profiles of zebrafish brd2 paralogs support a role in vertebrate developmental patterning and

  3. La carrera política y el capital político

    Directory of Open Access Journals (Sweden)

    Manuel Alcántara-Sáez

    2017-01-01

    Full Text Available Se trata de una propuesta de naturaleza teórica para el estudio de las carreras políticas desde la perspectiva de la existencia de tres momentos diferentes (entrada, desempeño y salida, en conformidad con el uso del capital político que gestionan los políticos. Se abordan teóricamente distintos patrones de capital político así como su impacto sobre las trayectorias políticas seguidas. El peso del tiempo transcurrido y los ingresos recibidos por la actividad política son igualmente considerados. Político es aquella persona que es elegida en un proceso electoral y/o que es nominada en un puesto de confianza por alguien elegido, también lo es quien tiene un cargo orgánico en una institución como un partido político. A ello debe sumarse recibir una remuneración por esa actividad.

  4. The cyclin-dependent kinase 8 module sterically blocks Mediator interactions with RNA polymerase II

    DEFF Research Database (Denmark)

    Elmlund, Hans; Baraznenok, Vera; Lindahl, Martin

    2006-01-01

    CDK8 (cyclin-dependent kinase 8), along with CycC, Med12, and Med13, form a repressive module (the Cdk8 module) that prevents RNA polymerase II (pol II) interactions with Mediator. Here, we report that the ability of the Cdk8 module to prevent pol II interactions is independent of the Cdk8......-dependent kinase activity. We use electron microscopy and single-particle reconstruction to demonstrate that the Cdk8 module forms a distinct structural entity that binds to the head and middle region of Mediator, thereby sterically blocking interactions with pol II....

  5. RNA polymerase II transcriptional fidelity control and its functional interplay with DNA modifications

    Science.gov (United States)

    Xu, Liang; Wang, Wei; Chong, Jenny; Shin, Ji Hyun; Xu, Jun; Wang, Dong

    2016-01-01

    Accurate genetic information transfer is essential for life. As a key enzyme involved in the first step of gene expression, RNA polymerase II (Pol II) must maintain high transcriptional fidelity while it reads along DNA template and synthesizes RNA transcript in a stepwise manner during transcription elongation. DNA lesions or modifications may lead to significant changes in transcriptional fidelity or transcription elongation dynamics. In this review, we will summarize recent progress towards understanding the molecular basis of RNA Pol II transcriptional fidelity control and impacts of DNA lesions and modifications on Pol II transcription elongation. PMID:26392149

  6. Nonmuscle Myosin II Is Required for Internalization of the Epidermal Growth Factor Receptor and Modulation of Downstream Signaling*

    Science.gov (United States)

    Kim, Jong Hyun; Wang, Aibing; Conti, Mary Anne; Adelstein, Robert S.

    2012-01-01

    Ligand-induced internalization of the epidermal growth factor receptor (EGFR) is an important process for regulating signal transduction, cellular dynamics, and cell-cell communication. Here, we demonstrate that nonmuscle myosin II (NM II) is required for the internalization of the EGFR and to trigger the EGFR-dependent activation of ERK and AKT. The EGFR was identified as a protein that interacts with NM II by co-immunoprecipitation and mass spectrometry analysis. This interaction requires both the regulatory light chain 20 (RLC20) of NM II and the kinase domain of the EGFR. Two paralogs of NM II, NM II-A, and NM II-B can act to internalize the EGFR, depending on the cell type and paralog content of the cell line. Loss (siRNA) or inhibition (25 μm blebbistatin) of NM II attenuates the internalization of the EGFR and impairs EGFR-dependent activation of ERK and AKT. Both internalization of the EGFR and downstream signaling to ERK and AKT can be partially restored in siRNA-treated cells by introduction of wild type (WT) GFP-NM II, but cannot be restored by motor mutant NM II. Taken together, these results suggest that NM II plays a role in the internalization of the EGFR and EGFR-mediated signaling pathways. PMID:22718763

  7. BRUTUS and its paralogs, BTS LIKE1 and BTS LIKE2, encode important negative regulators of the iron deficiency response in Arabidopsis thaliana.

    Science.gov (United States)

    Hindt, Maria N; Akmakjian, Garo Z; Pivarski, Kara L; Punshon, Tracy; Baxter, Ivan; Salt, David E; Guerinot, Mary Lou

    2017-07-19

    Iron (Fe) is required for plant health, but it can also be toxic when present in excess. Therefore, Fe levels must be tightly controlled. The Arabidopsis thaliana E3 ligase BRUTUS (BTS) is involved in the negative regulation of the Fe deficiency response and we show here that the two A. thaliana BTS paralogs, BTS LIKE1 (BTSL1) and BTS LIKE2 (BTSL2) encode proteins that act redundantly as negative regulators of the Fe deficiency response. Loss of both of these E3 ligases enhances tolerance to Fe deficiency. We further generated a triple mutant with loss of both BTS paralogs and a partial loss of BTS expression that exhibits even greater tolerance to Fe-deficient conditions and increased Fe accumulation without any resulting Fe toxicity effects. Finally, we identified a mutant carrying a novel missense mutation of BTS that exhibits an Fe deficiency response in the root when grown under both Fe-deficient and Fe-sufficient conditions, leading to Fe toxicity when plants are grown under Fe-sufficient conditions.

  8. Human Pol ζ purified with accessory subunits is active in translesion DNA synthesis and complements Pol η in cisplatin bypass.

    Science.gov (United States)

    Lee, Young-Sam; Gregory, Mark T; Yang, Wei

    2014-02-25

    DNA polymerase ζ (Pol ζ) is a eukaryotic B-family DNA polymerase that specializes in translesion synthesis and is essential for normal embryogenesis. At a minimum, Pol ζ consists of a catalytic subunit Rev3 and an accessory subunit Rev7. Mammalian Rev3 contains >3,000 residues and is twice as large as the yeast homolog. To date, no vertebrate Pol ζ has been purified for biochemical characterization. Here we report purification of a series of human Rev3 deletion constructs expressed in HEK293 cells and identification of a minimally catalytically active human Pol ζ variant. With a tagged form of an active Pol ζ variant, we isolated two additional accessory subunits of human Pol ζ, PolD2 and PolD3. The purified four-subunit Pol ζ4 (Rev3-Rev7-PolD2-PolD3) is much more efficient and more processive at bypassing a 1,2-intrastrand d(GpG)-cisplatin cross-link than the two-subunit Pol ζ2 (Rev3-Rev7). We show that complete bypass of cisplatin lesions requires Pol η to insert dCTP opposite the 3' guanine and Pol ζ4 to extend the primers.

  9. Rapid Genome-wide Recruitment of RNA Polymerase II Drives Transcription, Splicing, and Translation Events during T Cell Responses

    Directory of Open Access Journals (Sweden)

    Kathrin Davari

    2017-04-01

    Full Text Available Summary: Activation of immune cells results in rapid functional changes, but how such fast changes are accomplished remains enigmatic. By combining time courses of 4sU-seq, RNA-seq, ribosome profiling (RP, and RNA polymerase II (RNA Pol II ChIP-seq during T cell activation, we illustrate genome-wide temporal dynamics for ∼10,000 genes. This approach reveals not only immediate-early and posttranscriptionally regulated genes but also coupled changes in transcription and translation for >90% of genes. Recruitment, rather than release of paused RNA Pol II, primarily mediates transcriptional changes. This coincides with a genome-wide temporary slowdown in cotranscriptional splicing, even for polyadenylated mRNAs that are localized at the chromatin. Subsequent splicing optimization correlates with increasing Ser-2 phosphorylation of the RNA Pol II carboxy-terminal domain (CTD and activation of the positive transcription elongation factor (pTEFb. Thus, rapid de novo recruitment of RNA Pol II dictates the course of events during T cell activation, particularly transcription, splicing, and consequently translation. : Davari et al. visualize global changes in RNA Pol II binding, transcription, splicing, and translation. T cells change their functional program by rapid de novo recruitment of RNA Pol II and coupled changes in transcription and translation. This coincides with fluctuations in RNA Pol II phosphorylation and a temporary reduction in cotranscriptional splicing. Keywords: RNA Pol II, cotranscriptional splicing, T cell activation, ribosome profiling, 4sU, H3K36, Ser-5 RNA Pol II, Ser-2 RNA Pol II, immune response, immediate-early genes

  10. Agendamento de Políticas Públicas

    Directory of Open Access Journals (Sweden)

    Rosane Rosa

    2011-07-01

    Full Text Available Aborda-se o conceito de advocacy e contra-agendamento como uma forma de a Sociedade Civil incluir suas causas na mídia, objetivando a tematização e a possibilidade de transformar-se em política pública. Analisa-se a reportagem “Uma conquista longe das ruas”; resultado de um agendamento compartilhado e que, em muitos aspectos, serve de referência para cobertura de políticas públicas sociais.

  11. A visibilidade política na série The Crown

    Directory of Open Access Journals (Sweden)

    Giovana dos Passos Colling

    2018-02-01

    Full Text Available O presente trabalho tem por objetivo compreender como se configura a visibilidade política na trama da série The Crown, produzida pela Netflix, por meio da análise dos três primeiros episódios. A partir do enredo da série, que conta a história da família real britânica na época em que a Raínha Elizabeth II assume o trono e suas novas responsabilidades políticas, é possível perceber e analisar as relações de poder entre a política, a sociedade e a mídia, além de temáticas como imagem pública, escândalo político, relações políticas entre países e discurso midiático. A análise de conteúdo se dá a partir dos autores Gomes, Thompson e Weber. Assim, torna-se perceptível a indissociabilidade entre a mídia, a sociedade e a política para a manutenção de um governo estável, que se utilizando da visibilidade midiática de maneira favorável, estabelece uma comunicação eficiente e uma imagem pública forte e positiva.

  12. Characterization of Mycobacterium smegmatis PolD2 and PolD1 as RNA/DNA polymerases homologous to the POL domain of bacterial DNA ligase D.

    Science.gov (United States)

    Zhu, Hui; Bhattarai, Hitesh; Yan, Han-Guang; Shuman, Stewart; Glickman, Michael S

    2012-12-21

    Mycobacteria exploit nonhomologous end-joining (NHEJ) to repair DNA double-strand breaks. The core NHEJ machinery comprises the homodimeric DNA end-binding protein Ku and DNA ligase D (LigD), a modular enzyme composed of a C-terminal ATP-dependent ligase domain (LIG), a central 3'-phosphoesterase domain (PE), and an N-terminal polymerase domain (POL). LigD POL is proficient at adding templated and nontemplated deoxynucleotides and ribonucleotides to DNA ends in vitro and is the catalyst in vivo of unfaithful NHEJ events involving nontemplated single-nucleotide additions to blunt DSB ends. Here, we identify two mycobacterial proteins, PolD1 and PolD2, as stand-alone homologues of the LigD POL domain. Biochemical characterization of PolD1 and PolD2 shows that they resemble LigD POL in their monomeric quaternary structures, their ability to add templated and nontemplated nucleotides to primer-templates and blunt ends, and their preference for rNTPs versus dNTPs. Deletion of polD1, polD2, or both from a Mycobacterium smegmatis strain carrying an inactivating mutation in LigD POL failed to reveal a role for PolD1 or PolD2 in templated nucleotide additions during NHEJ of 5'-overhang DSBs or in clastogen resistance. Whereas our results document the existence and characteristics of new stand-alone members of the LigD POL family of RNA/DNA polymerases, they imply that other polymerases can perform fill-in synthesis during mycobacterial NHEJ.

  13. Overexpression of microRNAs from the miR-17-92 paralog clusters in AIDS-related non-Hodgkin's lymphomas.

    Directory of Open Access Journals (Sweden)

    Dharma R Thapa

    Full Text Available Individuals infected by HIV are at an increased risk for developing non-Hodgkin's lymphomas (AIDS-NHL. In the highly active antiretroviral therapy (HAART era, there has been a significant decline in the incidence of AIDS-associated primary central nervous system lymphoma (PCNSL. However, only a modest decrease in incidence has been reported for other AIDS-NHL subtypes. Thus, AIDS-NHLs remain a significant cause of morbidity and mortality in HIV infected individuals. Recently, much attention has been directed toward the role of miRNAs in cancer, including NHL. Several miRNAs, including those encoded by the miR-17-92 polycistron, have been shown to play significant roles in B cell tumorigenesis. However, the role of miRNAs in NHL in the setting of HIV infection has not been defined.We used quantitative realtime PCR to assess the expression of miRNAs from three different paralog clusters, miR-17-92, miR-106a-363, and miR-106b-25 in 24 cases of AIDS-NHLs representing four tumor types, Burkitt's lymphoma (BL, n = 6, diffuse large B-cell lymphoma (DLBCL, n = 8, primary central nervous system lymphoma (PCNSL, n = 5, and primary effusion lymphoma (PEL, n = 5. We also used microarray analysis to identify a differentiation specific miRNA signature of naïve, germinal center, and memory B cell subsets from tonsils (n = 4. miRNAs from the miR-17-92 paralog clusters were upregulated by B cells, specifically during the GC differentiation stage. We also found overexpression of these miRNA clusters in all four AIDS-NHL subtypes. Finally, we also show that select miRNAs from these clusters (miR-17, miR-106a, and miR-106b inhibited p21 in AIDS-BL and DLBCL cases, thus providing a mechanistic role for these miRNAs in AIDS-NHL pathogenesis.Dysregulation of miR-17-92 paralog clusters is a common feature of AIDS-associated NHLs.

  14. The YsrS Paralog DygS Has the Capacity To Activate Expression of the Yersinia enterocolitica Ysa Type III Secretion System.

    Science.gov (United States)

    Walker, Kimberly A; Griggs, Lauren A; Obrist, Markus; Bode, Addys; Summers, R Patrick; Miller, Virginia L

    2016-06-15

    The Yersinia enterocolitica Ysa type III secretion system (T3SS) is associated with intracellular survival, and, like other characterized T3SSs, it is tightly controlled. Expression of the ysa genes is only detected following growth at low temperatures (26°C) and in high concentrations of sodium chloride (290 mM) in the medium. The YsrSTR phosphorelay (PR) system is required for ysa expression and likely responds to NaCl. During our investigations into the Ysr PR system, we discovered that genes YE3578 and YE3579 are remarkably similar to ysrR and ysrS, respectively, and are probably a consequence of a gene duplication event. The amino acid differences between YE3578 and ysrR are primarily clustered into two short regions. The differences between YE3579 and ysrS are nearly all located in the periplasmic sensing domain; the cytoplasmic domains are 98% identical. We investigated whether these paralogs were capable of activating ysa gene expression. We found that the sensor paralog, named DygS, is capable of compensating for loss of ysrS, but the response regulator paralog, DygR, cannot complement a ysrR gene deletion. In addition, YsrR, but not DygR, interacts with the histidine phosphorelay protein YsrT. Thus, DygS likely activates ysa gene expression in response to a signal other than NaCl and provides an example of a phosphorelay system in which two sensor kinases feed into the same regulatory pathway. All organisms need mechanisms to promote survival in changing environments. Prokaryotic phosphorelay systems are minimally comprised of a histidine kinase (HK) that senses an extracellular stimulus and a response regulator (RR) but can contain three or more proteins. Through gene duplication, a unique hybrid HK was created. We show that, while the hybrid appears to retain all of the phosphorelay functions, it responds to a different signal than the original. Both HKs transmit the signal to the same RR, which activates a promoter that transcribes a set of genes

  15. Ingeniero, político, economista, inventor

    Directory of Open Access Journals (Sweden)

    Jimena Montaña Cuéllar

    2001-01-01

    Full Text Available Técnica y utopía. Biografía intelectual y política de Alejandro López, 1876-1940. Alberto Mayor Mora. Fondo Editorial Universidad Eafit, colección Cielos de Arena, Medellín, 2001, 621 págs., il.

  16. El marketing político

    Directory of Open Access Journals (Sweden)

    Alvaro H. Cifuentes G.

    2015-04-01

    Full Text Available RESUMEN Si un candidato desea ser elegido, las técnicas de marketing aplicadas a la política, le son imprescindibles. El marketing político (Politing es el análisis  metódico de los diferentes segmentos que integran el ámbito político de una sociedad y de los factores que puedan modificarlos. Se aplican al candidato, a los votantes, al análisis de la publicidad política, a los simpatizantes, a desconocedores  del partido y a los indecisos. Los candidatos colombianos lo están aplicando, y compañías nuestras exportan servicios  de asesoría de países suramericanos.Promocionar  un candidato implica estructurar una compañía tal como una empresa, aplicando técnicas de ventas, de fijación de cuotas y de planeación estratégica.

  17. Blogs, artefactos y política

    Directory of Open Access Journals (Sweden)

    María Belén Albornoz

    2010-05-01

    Full Text Available Este artículo problematiza la acepción de lo público en el espacio virtual que surge en la blogosfera política ecuatoriana en el contexto de la Asamblea Nacional Constituyente. A partir del análisis de la extensión de la política a los lugares virtuales, se aborda la blogosfera como proyecto político y la tecnología como formas de ordenamiento del mundo que la sociedad estabiliza. Se considera a la blogosfera política un espacio público regulado con la capacidad de ordenar y clasificar el mundo virtual por medio de dispositivos sociales, políticos y tecnológicos. Finalmente se propone el estudio del nuevo espacio público virtual desde un enfoque tecno-social que dé cuenta del entorno virtual como espacio formador de conductas.This article problematizes the acceptance of the public in the virtual space emerging in the Ecuadorian political blogosphere, in the context of the National Constitutional Assembly. Beginning with an analysis of the spread of politics to virtual spaces, the blogosphere is approached as a political project, and technology as ways of ordering the world that society stabilizes. The political blogosphere is taken to be a regulated public space with the ability to order and classify the virtual world by means of social, political and technological tools. Finally, the study of this new virtual public space from a techno-social focus is proposed, taking into account virtual surroundings as a space in which conducts are formed.

  18. Gene conversion and DNA sequence polymorphism in the sex-determination gene fog-2 and its paralog ftr-1 in Caenorhabditis elegans.

    Science.gov (United States)

    Rane, Hallie S; Smith, Jessica M; Bergthorsson, Ulfar; Katju, Vaishali

    2010-07-01

    Gene conversion, a form of concerted evolution, bears enormous potential to shape the trajectory of sequence and functional divergence of gene paralogs subsequent to duplication events. fog-2, a sex-determination gene unique to Caenorhabditis elegans and implicated in the origin of hermaphroditism in this species, resulted from the duplication of ftr-1, an upstream gene of unknown function. Synonymous sequence divergence in regions of fog-2 and ftr-1 (excluding recent gene conversion tracts) suggests that the duplication occurred 46 million generations ago. Gene conversion between fog-2 and ftr-1 was previously discovered in experimental fog-2 knockout lines of C. elegans, whereby hermaphroditism was restored in mutant obligately outcrossing male-female populations. We analyzed DNA-sequence variation in fog-2 and ftr-1 within 40 isolates of C. elegans from diverse geographic locations in order to evaluate the contribution of gene conversion to genetic variation in the two gene paralogs. The analysis shows that gene conversion contributes significantly to DNA-sequence diversity in fog-2 and ftr-1 (22% and 34%, respectively) and may have the potential to alter sexual phenotypes in natural populations. A radical amino acid change in a conserved region of the F-box domain of fog-2 was found in natural isolates of C. elegans with significantly lower fecundity. We hypothesize that the lowered fecundity is due to reduced masculinization and less sperm production and that amino acid replacement substitutions and gene conversion in fog-2 may contribute significantly to variation in the degree of inbreeding and outcrossing in natural populations.

  19. Analysis of major paralogs encoding the Fra a 1 allergen based on their organ-specificity in Fragaria × ananassa.

    Science.gov (United States)

    Ishibashi, Misaki; Nabe, Takeshi; Nitta, Yoko; Tsuruta, Hiroki; Iduhara, Miho; Uno, Yuichi

    2018-03-01

    Fra a 1 protein in strawberry causes oral allergic syndrome. Over 39 Fra a 1 paralogs have been identified in strawberry genome. Fra a 1.01 is major accumulating protein in edible organs. Strawberry fruits contain allergenic proteins that cause oral allergic syndrome. The hypothesized major allergen is Fra a 1, an ortholog of the birch pollen allergen protein Bet v 1. We organized Fra a 1 genes and analyzed their localizations at the transcriptional and translational levels. In total, 15 new Fra a 1 proteins were identified from the genomic database, increasing the total number of Fra a 1 to 30 proteins encoded by 39 genes. Fra a 1.02 was mostly expressed in receptacles, and Fra a 1.01 in achenes, when analyzed by RNA sequencing. Immunoblotting showed that the Fra a 1.01 protein was broadly accumulated in strawberry organs, while the Fra a 1.02 protein was mostly expressed in receptacles. Recombinant Fra a 1.01 strongly reacted with human IgE. The mRNA and protein expression levels of Fra a 1 did not correlate, indicating the importance of protein levels when evaluating the abundance of allergens in strawberry. Based on the localizations, accumulation levels and reactivity to human IgE, we determined that Fra a 1.01 was the most important allergen, followed by Fra a 1.02, and then other Fra a 1 proteins. The information obtained here will be useful for selecting the target Fra a 1 paralogs when breeding hypoallergenic strawberry.

  20. Observatorio de Política Internacional I. COLOMBIA - Colombia. Crónica de un proceso de paz fracasado

    OpenAIRE

    Neira Fernández, Enrique

    2007-01-01

    Observatorio de Política Internacional I. COLOMBIA (Neira Fernández, Enrique) RECIENTES Año 2008 Colombia. Cerca el fin del paramilitarismo Colombia. Cerca el fin de las Farc Colombia. Conflicto armado y desarrollo humano Colombia. Política exterior Colombia. Inicia el 2008 con buen pie Año 2007 Colombia. Tras las pasadas elecciones Colombia. El espectro de las próximas elecciones Colombia. La garrocha de Uribe Colombia. III Parapolíticos Colombia. II...

  1. Observatorio de Política Internacional I. COLOMBIA - El proceso de paz en sala de emergencia

    OpenAIRE

    Neira Fernández, Enrique

    2007-01-01

    Observatorio de Política Internacional I. COLOMBIA (Neira Fernández, Enrique) RECIENTES Año 2008 Colombia. Cerca el fin del paramilitarismo Colombia. Cerca el fin de las Farc Colombia. Conflicto armado y desarrollo humano Colombia. Política exterior Colombia. Inicia el 2008 con buen pie Año 2007 Colombia. Tras las pasadas elecciones Colombia. El espectro de las próximas elecciones Colombia. La garrocha de Uribe Colombia. III Parapolíticos Colombia. II...

  2. cobalt (ii), nickel (ii)

    African Journals Online (AJOL)

    DR. AMINU

    Department of Chemistry Bayero University, P. M. B. 3011, Kano, Nigeria. E-mail: hnuhu2000@yahoo.com. ABSTRACT. The manganese (II), cobalt (II), nickel (II) and .... water and common organic solvents, but are readily soluble in acetone. The molar conductance measurement [Table 3] of the complex compounds in.

  3. Políticas activas en las prestaciones por desempleo

    OpenAIRE

    Gil Jiménez, Javier

    2016-01-01

    El presente trabajo explica el tema de las políticas activas y políticas activas en las prestaciones por desempleo, tanto a nivel nacional como internacional. Para explicarlo se definen las políticas activas y sus funciones, tanto de formación, orientación y reinserción laboral. También se hace mención a las reformas llevadas a cabo en las diferentes políticas y el surgimiento de nuevos programas como función de políticas activas encaminadas a la reinserción laboral. Departamento de Derech...

  4. Amor y política.

    OpenAIRE

    Hernando Bernal.

    1998-01-01

    Este trabajo pretende hacer una serie de consideraciones que apuntan sobre todo a extraer una definición de lo que es «la política» para el psicoanálisis a partir de una observación que hace Jacques Alain Miller en su texto Lógicas de la vida amorosa sobre cómo Freud introduce una «teoría política» a partir de su texto Psicología de las masas y análisis del yo.En dicho texto Freud hace ver el poder ordenador y apaciguador del amor) significante amo) en la medida en que una masa no es más que ...

  5. Hans Kelsen: pensador político

    Directory of Open Access Journals (Sweden)

    Sara Lagi

    2011-01-01

    Full Text Available Hasta la publicación de Sobre la esencia y el valor de la democracia, Hans Kelsen era solo conocido como experto en derecho público. El valor de este artículo de Lagi radica en rescatar de la obra kelseniana un aspecto casi por completo olvidado por la crítica, a saber, sus análisis sobre el significado y las características de la democracia parlamentaria en los Estados modernos. Se aborda la cuestión no solo desde el debate teórico sino también desde su contexto histórico¿político. La teoría política de Kelsen es considerada una parte integral de su doctrina central, presentada en Teoría pura del derecho, su obra más conspicua. Un análisis del trabajo sobre la esencia y el valor de la democracia nos restituye la imagen de un Kelsen como original pensador político. Se analizan las dos ediciones de Sobre la esencia y el valor de la democracia (1920¿1929 con estos propósitos: comprender por qué decidió dedicarse a la teoría de la democracia un teórico que rigurosamente defendió la separación de la esfera jurídica respecto de la historia, la filosofía y la política; y por qué no se limitó a explicar la esencia de la democracia sino que decidió concentrarse en clarificar qué se entiende por valor de la democracia.

  6. Química general II

    OpenAIRE

    Olba Torrent, Amparo

    2018-01-01

    El document forma part dels materials docents programats mitjançant l'ajut del Servei de Política Lingüística de la Universitat de València Temes de l'assignatura: Química general II del primer curs del Grau de Química Topics of the course: General Chemistry II in the first year of the Degree in Chemistry

  7. Elecciones 2003: spots políticos y cultura política

    OpenAIRE

    Concepción Virriel

    2004-01-01

    El presente trabajo aborda el tema de las elecciones federales de 2003, en especial el fenómeno del abstencionismo. Para ello se vincula el comportamiento electoral en dichas elecciones con la cultura política, en donde los aspectos básicos son la cultura del fraude heredada de los gobiernos priístas y la redefinición de los partidos políticos ante una nueva coyuntura, y cómo éstos aspectos influyeron en la forma de comunicarse mediante sus spots. El análisis de dichos spots comprende el anál...

  8. Divergence of substrate specificity and function in the Escherichia coli hotdog-fold thioesterase paralogs YdiI and YbdB.

    Science.gov (United States)

    Latham, John A; Chen, Danqi; Allen, Karen N; Dunaway-Mariano, Debra

    2014-07-29

    The work described in this paper, and its companion paper (Wu, R., Latham, J. A., Chen, D., Farelli, J., Zhao, H., Matthews, K. Allen, K. N., and Dunaway-Mariano, D. (2014) Structure and Catalysis in the Escherichia coli Hotdog-fold Thioesterase Paralogs YdiI and YbdB. Biochemistry, DOI: 10.1021/bi500334v), focuses on the evolution of a pair of paralogous hotdog-fold superfamily thioesterases of E. coli, YbdB and YdiI, which share a high level of sequence identity but perform different biological functions (viz., proofreader of 2,3-dihydroxybenzoyl-holoEntB in the enterobactin biosynthetic pathway and catalyst of the 1,4-dihydoxynapthoyl-CoA hydrolysis step in the menaquinone biosynthetic pathway, respectively). In vitro substrate activity screening of a library of thioester metabolites showed that YbdB displays high activity with benzoyl-holoEntB and benzoyl-CoA substrates, marginal activity with acyl-CoA thioesters, and no activity with 1,4-dihydoxynapthoyl-CoA. YdiI, on the other hand, showed a high level of activity with its physiological substrate, significant activity toward a wide range of acyl-CoA thioesters, and minimal activity toward benzoyl-holoEntB. These results were interpreted as evidence for substrate promiscuity that facilitates YbdB and YdiI evolvability, and divergence in substrate preference, which correlates with their assumed biological function. YdiI support of the menaquinone biosynthetic pathway was confirmed by demonstrating reduced anaerobic growth of the E. coli ydiI-knockout mutant (vs wild-type E. coli) on glucose in the presence of the electron acceptor fumarate. Bioinformatic analysis revealed that a small biological range exists for YbdB orthologs (i.e., limited to Enterobacteriales) relative to that of YdiI orthologs. The divergence in YbdB and YdiI substrate specificity detailed in this paper set the stage for their structural analyses reported in the companion paper.

  9. Prototype Theory Based Feature Representation for PolSAR Images

    OpenAIRE

    Huang Xiaojing; Yang Xiangli; Huang Pingping; Yang Wen

    2016-01-01

    This study presents a new feature representation approach for Polarimetric Synthetic Aperture Radar (PolSAR) image based on prototype theory. First, multiple prototype sets are generated using prototype theory. Then, regularized logistic regression is used to predict similarities between a test sample and each prototype set. Finally, the PolSAR image feature representation is obtained by ensemble projection. Experimental results of an unsupervised classification of PolSAR images show that our...

  10. Desarrollo vocacional y política pública

    OpenAIRE

    Watts, Anthony G.

    2000-01-01

    El trabajo analiza la base para el interés político en los servicios de desarrollo vocacional, y la manera en la cual esta base está siendo fortalecida por las actuales transformaciones en el trabajo y en el desarrollo vocacional. Se exploran los papeles potenciales de la política pública en los servicios de desarrollo vocacional así como las formas en las que dichos servicios pueden influenciar el proceso de la creación de políticas. Se identifican una gama de temas de política relacionados ...

  11. Política, violencia y literatura

    Directory of Open Access Journals (Sweden)

    Kohut, Karl

    2002-06-01

    Full Text Available Tomando como punto de partida la opinión general de que América Latina es el continente violento por excelencia y la hipótesis defendida por Ariel Dorfman (1972 se analiza aquí la cuestión de la violencia política, ciñéndose a la literatura de la segunda mitad del siglo XX. Tras discutir las definiciones (divergentes de la violencia propuestas por la filosofía política, se pasa a una fenomenología de la violencia en la literatura, examinando hasta qué punto y en qué sentido ésta sería el carácter distintivo de la literatura latinoamericana. Finalmente, se analiza la metarreflexión sobre la violencia política en la literatura ficcional, centrándose en tres puntos: (1 el (presunto ser violento del mundo latinoamericano, (2 la violencia estatal, y (3 la violencia de la resistencia. Se constata, entre otras cosas, que ha habido una tendencia a atacar la violencia estatal y defender la de la resistencia; tendencia comprensible en tiempos de dictadura, pero que se vuelve problemática bajo una democracia. Dos preguntas cierran este trabajo: hasta qué punto la violencia es un fenómeno de la cultura, que crece en su mismo seno, y no un fenómeno extracultural dirigido contra ella, y hasta dónde la libertad individual y la seguridad cívica pueden ser conciliadas, punto que ha ocupado un lugar central en la discusión internacional después de los acontecimientos del 11 de septiembre.

  12. La polémica del nacionalismo

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    Germán Posada

    1961-10-01

    Full Text Available La polémica empezó con el artículo de Hernando Téllez, hace veinte días. Con el pretexto de defender a los escritores de su propia generación, a quienes, según él, se viene acusando sistemáticamente de producir una literatura desarraigada y ausente de la vida nacional, Téllez se lanzó a combatir las teorías de " nacionalismo literario'' que actualmente se agitan en Colombia.

  13. Dos Partidos Políticos

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    Marquessuel Dantas de Souza

    2017-09-01

    Full Text Available A presente resenha se refere ao interessante texto de Simone Weil (Note sur la suppression générale des partis politiques - de 1940, escrito em Londres, traduzido e publicado pela iniciativa audaciosa da Editora Ayiné. Originalmente publicado na coletânea intitulada ÉCRITS DE LONDRES et dernières lettres - Éditions Gallimard (1957, este texto apresenta de forma singular o que significa um partido político; algo de muita importância para e na vida social do homem moderno.

  14. Amor y política.

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    Hernando Bernal.

    1998-09-01

    Full Text Available Este trabajo pretende hacer una serie de consideraciones que apuntan sobre todo a extraer una definición de lo que es «la política» para el psicoanálisis a partir de una observación que hace Jacques Alain Miller en su texto Lógicas de la vida amorosa sobre cómo Freud introduce una «teoría política» a partir de su texto Psicología de las masas y análisis del yo.En dicho texto Freud hace ver el poder ordenador y apaciguador del amor significante amo en la medida en que una masa no es más que el amor uniendo a muchas personas y reiterado en cada una de ellas. Las fuerzas armadas y la Iglesia son un buen ejemplo de ello.Pero a pesar de la cohesión amorosa de la humanidad por el poder unificante del amor, resta siempre un malestar. El malestar que persiste en la cultura testimonia del fracaso del amor para resolver el empuje del hombre a satisfacerse con el mal. El significante amo no parece entonces solucionar la paradoja del goce. De aquí que preguntarse sobre adónde vaya el goce en el orden social sea también, para el psicoanálisis, una cuestión política. Jacques- Alain Miller observa, en su texto Lógicas de la vida amorosa, cómo, a partir de la Psicología de las masas y análisis del yo, se puede extraer de Freud una «teoría política», que se vincula muy estrechamente con el amor. Esto porque La Psicología de las masas... enseña sobre el poder ordenador y apaciguador del amor, o mejor, del significante «amor» como significante Amo, lo que se puede escribir de la siguiente manera con ayuda de la «teoría de los discursos» o «teoría del vínculo social» de Lacan.

  15. Políticas de reconhecimento uma novidade das políticas sociais do PT?

    Directory of Open Access Journals (Sweden)

    Krischke, Paulo Jose Duval da Silva

    2004-01-01

    Full Text Available O presente trabalho levanta a hipótese de que as ações de governo do PT estão inovando significativamente na necessária convergência (cf. Fraser, 1999; Honnetch, 2003 entre as tradicionais políticas de redistribuição sócio-econômica, e uma nova diretriz de reconhecimento das diferenças sócio-políticas e culturais. O argumento retoma a trajetória sindical do PT e os efeitos das políticas participativas, nas mudanças da cultura política em várias partes do país. Entre esses efeitos, o crescente apoio à democracia parece relacionar-se ao reconhecimento do direito à diferença e ao pluralismo - principalmente entre a juventude e naqueles locais onde o PT tem governado na última década

  16. Proviral HIV-genome-wide and pol-gene specific zinc finger nucleases: usability for targeted HIV gene therapy.

    Science.gov (United States)

    Wayengera, Misaki

    2011-07-22

    Infection with HIV, which culminates in the establishment of a latent proviral reservoir, presents formidable challenges for ultimate cure. Building on the hypothesis that ex-vivo or even in-vivo abolition or disruption of HIV-gene/genome-action by target mutagenesis or excision can irreversibly abrogate HIV's innate fitness to replicate and survive, we previously identified the isoschizomeric bacteria restriction enzymes (REases) AcsI and ApoI as potent cleavers of the HIV-pol gene (11 and 9 times in HIV-1 and 2, respectively). However, both enzymes, along with others found to cleave across the entire HIV-1 genome, slice (SX) at palindromic sequences that are prevalent within the human genome and thereby pose the risk of host genome toxicity. A long-term goal in the field of R-M enzymatic therapeutics has thus been to generate synthetic restriction endonucleases with longer recognition sites limited in specificity to HIV. We aimed (i) to assemble and construct zinc finger arrays and nucleases (ZFN) with either proviral-HIV-pol gene or proviral-HIV-1 whole-genome specificity respectively, and (ii) to advance a model for pre-clinically testing lentiviral vectors (LV) that deliver and transduce either ZFN genotype. First, we computationally generated the consensus sequences of (a) 114 dsDNA-binding zinc finger (Zif) arrays (ZFAs or ZifHIV-pol) and (b) two zinc-finger nucleases (ZFNs) which, unlike the AcsI and ApoI homeodomains, possess specificity to >18 base-pair sequences uniquely present within the HIV-pol gene (ZifHIV-polFN). Another 15 ZFNs targeting >18 bp sequences within the complete HIV-1 proviral genome were constructed (ZifHIV-1FN). Second, a model for constructing lentiviral vectors (LVs) that deliver and transduce a diploid copy of either ZifHIV-polFN or ZifHIV-1FN chimeric genes (termed LV- 2xZifHIV-polFN and LV- 2xZifHIV-1FN, respectively) is proposed. Third, two preclinical models for controlled testing of the safety and efficacy of either of these

  17. Phosphorus Partitioning of Soybean Lines Containing Different Mutant Alleles of Two Soybean Seed-Specific Adenosine Triphosphate-Binding Cassette Phytic Acid Transporter Paralogs

    Directory of Open Access Journals (Sweden)

    Jason D. Gillman

    2013-03-01

    Full Text Available Seed phytate is a repository of P and minerals in soybean [ (L. Merr.] seeds that limits P and mineral bioavailability for monogastric animals (e.g., humans, swine [], and poultry [especially chicken, ] due to insufficient digestive tract phytase activity. We previously identified epistatic recessive mutations affecting two paralogous adenosine triphosphate-binding cassette phytic acid transporter genes (one a nonsense mutation in and the other a missense mutation in as the molecular genetic basis in the ethyl methanesulfonate (EMS-induced mutant low phytate soybean line M153. An additional mutant low phytate line, M766, contained one single nucleotide polymorphism within the ninth intron of the locus as well as a nonsense mutation in . The objectives of this research were to clarify the genetics underlying the low phytate phenotype in line M766 and to determine P partitioning in new combinations of mutant alleles from M766 and M153. Inheritance of nonsense alleles affecting both ( genes (one from M153 and one from M766 led to the production of viable seeds that contained transgressive reductions in total seed phytate and significantly higher levels of inorganic phosphate than has been reported for nontransgenic soybean material and will allow efficient molecular selection of soybeans with even greater reductions of phytate for improved quality soybean meal.

  18. Interactome analyses identify ties of PrP and its mammalian paralogs to oligomannosidic N-glycans and endoplasmic reticulum-derived chaperones.

    Directory of Open Access Journals (Sweden)

    Joel C Watts

    2009-10-01

    Full Text Available The physiological environment which hosts the conformational conversion of the cellular prion protein (PrP(C to disease-associated isoforms has remained enigmatic. A quantitative investigation of the PrP(C interactome was conducted in a cell culture model permissive to prion replication. To facilitate recognition of relevant interactors, the study was extended to Doppel (Prnd and Shadoo (Sprn, two mammalian PrP(C paralogs. Interestingly, this work not only established a similar physiological environment for the three prion protein family members in neuroblastoma cells, but also suggested direct interactions amongst them. Furthermore, multiple interactions between PrP(C and the neural cell adhesion molecule, the laminin receptor precursor, Na/K ATPases and protein disulfide isomerases (PDI were confirmed, thereby reconciling previously separate findings. Subsequent validation experiments established that interactions of PrP(C with PDIs may extend beyond the endoplasmic reticulum and may play a hitherto unrecognized role in the accumulation of PrP(Sc. A simple hypothesis is presented which accounts for the majority of interactions observed in uninfected cells and suggests that PrP(C organizes its molecular environment on account of its ability to bind to adhesion molecules harboring immunoglobulin-like domains, which in turn recognize oligomannose-bearing membrane proteins.

  19. Interactome analyses identify ties of PrP and its mammalian paralogs to oligomannosidic N-glycans and endoplasmic reticulum-derived chaperones.

    Science.gov (United States)

    Watts, Joel C; Huo, Hairu; Bai, Yu; Ehsani, Sepehr; Jeon, Amy Hye Won; Won, Amy Hye; Shi, Tujin; Daude, Nathalie; Lau, Agnes; Young, Rebecca; Xu, Lei; Carlson, George A; Williams, David; Westaway, David; Schmitt-Ulms, Gerold

    2009-10-01

    The physiological environment which hosts the conformational conversion of the cellular prion protein (PrP(C)) to disease-associated isoforms has remained enigmatic. A quantitative investigation of the PrP(C) interactome was conducted in a cell culture model permissive to prion replication. To facilitate recognition of relevant interactors, the study was extended to Doppel (Prnd) and Shadoo (Sprn), two mammalian PrP(C) paralogs. Interestingly, this work not only established a similar physiological environment for the three prion protein family members in neuroblastoma cells, but also suggested direct interactions amongst them. Furthermore, multiple interactions between PrP(C) and the neural cell adhesion molecule, the laminin receptor precursor, Na/K ATPases and protein disulfide isomerases (PDI) were confirmed, thereby reconciling previously separate findings. Subsequent validation experiments established that interactions of PrP(C) with PDIs may extend beyond the endoplasmic reticulum and may play a hitherto unrecognized role in the accumulation of PrP(Sc). A simple hypothesis is presented which accounts for the majority of interactions observed in uninfected cells and suggests that PrP(C) organizes its molecular environment on account of its ability to bind to adhesion molecules harboring immunoglobulin-like domains, which in turn recognize oligomannose-bearing membrane proteins.

  20. 2.4 Å resolution crystal structure of human TRAP1 NM , the Hsp90 paralog in the mitochondrial matrix

    Energy Technology Data Exchange (ETDEWEB)

    Sung, Nuri; Lee, Jungsoon; Kim, Ji-Hyun; Chang, Changsoo; Tsai, Francis T. F.; Lee, Sukyeong

    2016-07-13

    TRAP1 is an organelle-specific Hsp90 paralog that is essential for neoplastic growth. As a member of the Hsp90 family, TRAP1 is presumed to be a general chaperone facilitating the late-stage folding of Hsp90 client proteins in the mitochondrial matrix. Interestingly, TRAP1 cannot replace cytosolic Hsp90 in protein folding, and none of the known Hsp90 co-chaperones are found in mitochondria. Thus, the three-dimensional structure of TRAP1 must feature regulatory elements that are essential to the ATPase activity and chaperone function of TRAP1. Here, the crystal structure of a human TRAP1NMdimer is presented, featuring an intact N-domain and M-domain structure, bound to adenosine 5'-β,γ-imidotriphosphate (ADPNP). The crystal structure together with epitope-mapping results shows that the TRAP1 M-domain loop 1 contacts the neighboring subunit and forms a previously unobserved third dimer interface that mediates the specific interaction with mitochondrial Hsp70.

  1. 2.4 Å resolution crystal structure of human TRAP1NM, the Hsp90 paralog in the mitochondrial matrix.

    Science.gov (United States)

    Sung, Nuri; Lee, Jungsoon; Kim, Ji Hyun; Chang, Changsoo; Tsai, Francis T F; Lee, Sukyeong

    2016-08-01

    TRAP1 is an organelle-specific Hsp90 paralog that is essential for neoplastic growth. As a member of the Hsp90 family, TRAP1 is presumed to be a general chaperone facilitating the late-stage folding of Hsp90 client proteins in the mitochondrial matrix. Interestingly, TRAP1 cannot replace cytosolic Hsp90 in protein folding, and none of the known Hsp90 co-chaperones are found in mitochondria. Thus, the three-dimensional structure of TRAP1 must feature regulatory elements that are essential to the ATPase activity and chaperone function of TRAP1. Here, the crystal structure of a human TRAP1NM dimer is presented, featuring an intact N-domain and M-domain structure, bound to adenosine 5'-β,γ-imidotriphosphate (ADPNP). The crystal structure together with epitope-mapping results shows that the TRAP1 M-domain loop 1 contacts the neighboring subunit and forms a previously unobserved third dimer interface that mediates the specific interaction with mitochondrial Hsp70.

  2. Minichromosome maintenance helicase paralog MCM9 is dispensible for DNA replication but functions in germ-line stem cells and tumor suppression.

    Science.gov (United States)

    Hartford, Suzanne A; Luo, Yunhai; Southard, Teresa L; Min, Irene M; Lis, John T; Schimenti, John C

    2011-10-25

    Effective DNA replication is critical to the health and reproductive success of organisms. The six MCM2-7 proteins, which form the replicative helicase, are essential for high-fidelity replication of the genome. Many eukaryotes have a divergent paralog, MCM9, that was reported to be essential for loading MCM2-7 onto replication origins in the Xenopus oocyte extract system. To address the in vivo role of mammalian MCM9, we created and analyzed the phenotypes of mice with various mutations in Mcm9 and an intronic DNA replication-related gene Asf1a. Ablation of Mcm9 was compatible with cell proliferation and mouse viability, showing that it is nonessential for MCM2-7 loading or DNA replication. Mcm9 mutants underwent p53-independent embryonic germ-cell depletion in both sexes, with males also exhibiting defective spermatogonial stem-cell renewal. MCM9-deficient cells had elevated genomic instability and defective cell cycle reentry following replication stress, and mutant animals were prone to sex-specific cancers, most notably hepatocellular carcinoma in males. The phenotypes of mutant mice and cells suggest that MCM9 evolved a specialized but nonessential role in DNA replication or replication-linked quality-control mechanisms that are especially important for germ-line stem cells, and also for tumor suppression and genome maintenance in the soma.

  3. Dinâmica Institucional, Políticas Públicas e o Desempenho Político Ambiental Brasileiro

    Directory of Open Access Journals (Sweden)

    Diego de Freitas Rodrigues

    2011-12-01

    Full Text Available Este estudo buscou analisar os efeitos da interdependência entre instituições políticas e modelos de desenvolvimento no desempenho de políticas ambientais no Brasil. A hipótese central do trabalho é que, dada a interdependência entre os organismos responsáveis pelas políticas ambientais e padrões de desenvolvimento pouco responsivos à complexidade ambiental, ocorre uma dispersão de poder decisório incentivando o modelo de desenvolvimento de alto carbono. Além de revisão da literatura em Políticas Públicas e Economia Ecológica, foram operacionalizadas (1 uma análise do desenho político-institucional brasileiro e (2 o quadro de gastos públicos do governo federal brasileiro com meio ambiente. Dois resultados foram observados: 1o o desenho e as competências das instituições políticas responsáveis pela formulação e implementação de políticas públicas interferem na maior eficiência de políticas ambientais; 2o quanto maior a abertura institucional, maior a tendência de paralisia decisória na formulação e implementação de políticas públicas ambientais.

  4. Croce, Gramsci e a "autonomia da política"

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    Álvaro Bianchi

    2007-11-01

    Full Text Available Na reflexão que Gramsci desenvolveu nos Quaderni del carcere, o tema da autonomia da política ocupa uma importante posição. Foi com base nessa reflexão que Gramsci desenvolveu sua pesquisa a respeito de política e da possibilidade de uma ciência política. Segundo Benedetto Croce, cabia a Nicolau Maquiavel o mérito de ter afirmado pela primeira vez a autonomia da política. Para Croce, essa autonomia permitia estabelecer uma distinção radical entre ética e política e entre "filosofia da política" e "ciência empírica da política". Gramsci tomou criticamente a reflexão croceana como ponto de partida de sua leitura de Maquiavel. O reconhecimento da autonomia da política implicava que esta não poderia ser reduzida à religião ou à ética. Como campo do conhecimento e como atividade, a ciência política e a política tinham regras próprias, que as distinguiam de outras formas do conhecimento e da atividade humana. Mas tal "autonomia" não implicava, para o marxista sardo, uma separação radical entre política e moral. Por essa razão, Gramsci encontrava em Maquiavel um precursor da filosofia da práxis em sentido pleno, ou seja, o criador de uma "ciência-ação revolucionária".

  5. Cultura Política na Antiguidade

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    José Petrúcio Farias Júnior

    2009-06-01

    Full Text Available

    Pretendemos discutir nesse artigo algumas implicações do termo cultura política na Antiguidade, especificamente, na sociedade romana imperial. Dessa forma, acreditamos que as considerações que apresentaremos a seguir contribuam para reflexão da utilização desse termo, produto das investigações contemporâneas, sobre os estudos das sociedades antigas. Para a historiadora Profa. Dra. Margarida Maria de Carvalho, tais reflexões representam ainda uma lacuna na historiografia concernente a essa temática. Isso posto, discorreremos, inicialmente, sobre o conceito de cultura e seus desdobramentos para, em seguida, refletirmos sobre o viés interpretativo que fundamenta estudos históricos que se desenvolvem sob o beneplácito da linha de pesquisa intitulada História e Cultura Política.

  6. Adeus à política

    Directory of Open Access Journals (Sweden)

    Manoel Mendonça Filho

    2012-01-01

    Full Text Available O artigo trata as questões do "Estado" e da "Política" partindo do exemplo concreto do processo de institucionalização, no Brasil, de práticas profissionais em psicologia reconhecidas como Análise Institucional (vertente grupalista francesa consideravelmente difundida nos últimos 20 anos. Trabalho para expor uma face menos visível da judicialização que funciona ao nível das concepções, crenças e valores entre os operadores dos equipamentos onde se materializam as políticas públicas engendradas pelo excesso legalista. Dentre as modalidades desse apego à lei, toma-se em análise aquela mais próxima de nossas práticas de funcionalismo público marcando o índice de grau máximo de sua institucionalização: a aceitação consensual da competência como critério de legitimidade na operação dos "instrumentos da violência institucional".

  7. Política de los intelectuales

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    Todorov Tzevetan

    1998-06-01

    Full Text Available ¿Qué es un intelectual? Por lo que a mi respecta, limito el uso de este término de la siguiente manera: es un estudioso o un artista (categoria que incluye a los escritores que no se contenta con realizar trabajos cientificos o con la creación de una obra de arte, que no se contenta, por lo tanto, con una méra búsqueda de lo verdadero y con un méro desarrollo de lo bello, sino que siente asimismo comprometido con la noción de bienestar público, con los valores de la sociedad en la que vive, es alguien que participa en el debate sobre esos mismos valores. El intelectual así entendido se halla muy lejos del artista o del estudioso a quienes no preocupan en absoluto las dimensiones políticas o éticas de sus obras; muy lejos también, del predicador o del político profesional, que no crean obra alguna.

  8. Las rentas de las exportaciones y la política comercial con oligopolio

    Directory of Open Access Journals (Sweden)

    Marcos Ávalos

    2005-01-01

    Full Text Available Para una industria oligopólica, este ensayo analiza la manera cómo la políti -ca comercial puede depender de la naturaleza competitiva de los mercados.Estudiamos los efectos de las fusiones nacionales y extranjeras en la políticaco mer cial óp ti ma del país de re fe ren cia y en las ren tas de las ex por ta cio nes yel bienestar interno. Hay cuatro resultados principales: i se de mues tra quesi el país de referencia aplica su política comercial óptima, siempre perderáa resultas de una fusión extranje ra; ii cuan do el país de re fe ren cia apli ca supolítica comercial óptima, una fusión extranjera disminuirá las rentas de lasexportaciones; iii cuando el gobierno responde óptimamente a una fusióninterna, ésta no afectará el bienestar nacional, y iv cuan do el go bier no res -pon de óp ti ma men te a una fu sión in ter na, ésta no afec ta rá las ren tas de lasexportaciones.

  9. Historia del Pensamiento Político Premoderno 05 Fin de la polis. Alejandro Magno

    OpenAIRE

    Sanz Díaz, Benito

    2010-01-01

    Tema 5 El fin de la polis y el surgimiento de nuevas escuelas filosóficas 1.- El declive de la polis griega 2.- Transformación, decadencia y fin de las polis griegas 3.- Filipo II de Macedonia 4.- Alejandro Magno 5.- Helenismo y nuevas concepciones políticas 6.- Epicureismo. Epicuro de Samos 7.- Los cínicos. Ni hogar ni patria, ni ciudad ni ley 8.- El estoicismo. El estoico es un ciudadano del mundo. El cosmopolitismo. La stoa 9.- Las Meditaciones de Marco Aurel...

  10. Economía Política I, 2010-11

    OpenAIRE

    Antón Pérez, José Ignacio

    2010-01-01

    I. Materiales de clase: Teoría: 0. Conceptos básicos; 1. El problema económico; 2. Las ganancias derivadas del comercio; 3. Elementos básicos de la oferta y la demanda; 4. Elasticidades; 5. La medición del bienestar y la política económica; 6. La empresa: producción, costes y beneficios; 7. Las empresas en los mercados competitivos; Ejercicios: Ejercicios del Tema 2; Ejercicios del Tema 3; Ejercicios del Tema 4; Ejercicios del Tema 5; Ejercicios del Tema 6 y 7; Ejercicios de Repaso. II. Bibli...

  11. Stimulation of Pol III-dependent 5S rRNA and U6 snRNA gene expression by AP-1 transcription factors.

    Science.gov (United States)

    Ahuja, Richa; Kumar, Vijay

    2017-07-01

    RNA polymerase III transcribes structurally diverse group of essential noncoding RNAs including 5S ribosomal RNA (5SrRNA) and U6 snRNA. These noncoding RNAs are involved in RNA processing and ribosome biogenesis, thus, coupling Pol III activity to the rate of protein synthesis, cell growth, and proliferation. Even though a few Pol II-associated transcription factors have been reported to participate in Pol III-dependent transcription, its activation by activator protein 1 (AP-1) factors, c-Fos and c-Jun, has remained unexplored. Here, we show that c-Fos and c-Jun bind to specific sites in the regulatory regions of 5S rRNA (type I) and U6 snRNA (type III) gene promoters and stimulate their transcription. Our chromatin immunoprecipitation studies suggested that endogenous AP-1 factors bind to their cognate promoter elements during the G1/S transition of cell cycle apparently synchronous with Pol III transcriptional activity. Furthermore, the interaction of c-Jun with histone acetyltransferase p300 promoted the recruitment of p300/CBP complex on the promoters and facilitated the occupancy of Pol III transcriptional machinery via histone acetylation and chromatin remodeling. The findings of our study, together, suggest that AP-1 factors are novel regulators of Pol III-driven 5S rRNA and U6 snRNA expression with a potential role in cell proliferation. © 2017 Federation of European Biochemical Societies.

  12. Human PrimPol activity is enhanced by RPA.

    Science.gov (United States)

    Martínez-Jiménez, María I; Lahera, Antonio; Blanco, Luis

    2017-04-10

    Human PrimPol is a primase belonging to the AEP superfamily with the unique ability to synthesize DNA primers de novo, and a non-processive DNA polymerase able to bypass certain DNA lesions. PrimPol facilitates both mitochondrial and nuclear replication fork progression either acting as a conventional TLS polymerase, or repriming downstream of blocking lesions. In vivo assays have shown that PrimPol is rapidly recruited to sites of DNA damage by interaction with the human replication protein A (RPA). In agreement with previous findings, we show here that the higher affinity of RPA for ssDNA inhibits PrimPol activities in short ssDNA templates. In contrast, once the amount of ssDNA increases up to a length in which both proteins can simultaneously bind ssDNA, as expected during replicative stress conditions, PrimPol and RPA functionally interact, and their binding capacities are mutually enhanced. When using M13 ssDNA as template, RPA stimulated both the primase and polymerase activities of PrimPol, either alone or in synergy with Polε. These new findings supports the existence of a functional PrimPol/RPA association that allows repriming at the exposed ssDNA regions formed in the leading strand upon replicase stalling.

  13. O conceito de liberdade política em Montesquieu

    Directory of Open Access Journals (Sweden)

    Maria Beatriz Nizza da Silva

    1969-06-01

    Full Text Available O primeiro passo na análise do conceito de liberdade política, tal como êle se nos apresenta em De l'esprit des lois, deverá assina-lar uma diferença, fundamental para Montesquieu, entre "liberdade filosófica" e "liberdade política".

  14. Los spots factor, esencial del marketing político

    Directory of Open Access Journals (Sweden)

    María de Jesús Origel Gutiérrez

    2000-01-01

    Full Text Available EI objetivo del presente trabajo es demostrar que en las elecciones presidenciales de julio de 2000, la forma de hacer política en México se modificó al introducir en las campanas electorales el marketing político y nuevas estrategias de comunicación, en especial los spots televisivos

  15. As armadilhas do tripé da política macroeconômica brasileira

    Directory of Open Access Journals (Sweden)

    ANDRÉ NASSIF

    2015-09-01

    Full Text Available RESUMOEste artigo analisa o chamado tripé da política macroeconômica brasileira, que desde 1999 tem combinado um regime de metas de inflação, um regime de taxa de câmbio flutuante e metas de superávit fiscal primário. A menos que o seu modus operandi seja alterado, o tripé não será capaz de libertar a economia brasileira de outra "possível trindade": altas taxas de juros reais, a apreciação da taxa de câmbio real e crescimento econômico muito baixo. Depois de analisar brevemente a base teórica sob o tripé macroeconômico, o artigo mostra por que este regime de política macroeconômica, se avaliado numa perspectiva de longo ou médio prazo, não tem sido capaz de garantir a estabilidade dos preços nem o crescimento econômico. Além da sugestão de romper com a estratégia brasileira de crescer com poupança externa, o documento também sugere três principais formas de mudar o modus operandi do tripé brasileiro: i aumentar o horizonte de tempo para atingir a meta de inflação, como tem sido o experiência da maioria dos países que adotam esse regime de política monetária; ii restaurar o papel anticíclico da política fiscal brasileira; e iii adotar uma combinação de mecanismos que visem prevenir que a moeda brasileira entre em uma nova tendência cíclica da apreciação em termos reais.

  16. Política digital: El uso de Facebook en política electoral en Costa Rica (II

    Directory of Open Access Journals (Sweden)

    Roberto Cruz Romero

    2017-07-01

    Full Text Available Se presenta una continuación al trabajo realizado sobre el uso de Internet en procesos electorales, trazando paralelismos y subrayando las diferencias que subyacen entre la significancia simbólica de una elección presidencial y las elecciones municipales para la ciudadanía. Nuevamente, se recurre a un análisis del comportamiento en redes sociales, Facebook específicamente, y un análisis contextual de la realidad sociopolítica percibida en las distintas localidades, y en cada partido. Se estudiaron 26 partidos inscritos solamente a escala cantonal, y se profundizó en los casos de cinco partidos cantonales que obtuvieron la victoria en la respectiva alcaldía. Esto respalda y robustece la línea de investigación que desde el Programa Sociedad de la Información y el Conocimiento (PROSIC se ha trabajado, en aras de presentar el potencial de la tecnología en la democracia, como un elemento más en la construcción de una sociedad basada en la información y el conocimiento

  17. Survey of Current US Army POL Doctrine, Procedures, Personnel, and Equipment for the Supply and Inland Distribution of Bulk POL

    Science.gov (United States)

    1985-10-01

    Refueling Under Armor ......................... 34 Page i ,t .J APPENDICES A. POL Unit Missions and Capabilities ....................... A-I B. Roster...refueling Open versus closed port refueling Requirement for Refueling Under Armor Robotic refueler V % Page 34 S.< ’p. ". APPgeDI A-"" • " ’ ’ POL " it

  18. A política da Igreja Universal e seus reflexos nos campos religioso e político brasileiros

    Directory of Open Access Journals (Sweden)

    Oro Ari Pedro

    2003-01-01

    Full Text Available Este texto versa sobre a inserção da Igreja Universal do Reino de Deus (IURD na política nacional e seus efeitos nos campos religioso e político. Em razão da eficácia de seu carisma institucional, a Universal procedeu, dentro do próprio grupo religioso, a uma ressemantização do ato de votar em particular e da percepção da política em geral, inscrevendo-os em sua lógica religiosa. Isso é uma importante chave explicativa para o elevado grau de fidelidade de votos e o êxito político cada vez maior constatado nas últimas eleições. Ademais, a prática política da Universal está produzindo um efeito mimético em outra igrejas evangélicas, que tendem a imitar seu modelo de fazer política. Sua inserção política, sobretudo por intermédio do Partido Liberal, não passa despercebida pelos partidos, constituindo-se, assim, em um ator relevante na atual conjuntura política brasileira.

  19. Inference of RNA polymerase II transcription dynamics from chromatin immunoprecipitation time course data.

    Directory of Open Access Journals (Sweden)

    Ciira wa Maina

    2014-05-01

    Full Text Available Gene transcription mediated by RNA polymerase II (pol-II is a key step in gene expression. The dynamics of pol-II moving along the transcribed region influence the rate and timing of gene expression. In this work, we present a probabilistic model of transcription dynamics which is fitted to pol-II occupancy time course data measured using ChIP-Seq. The model can be used to estimate transcription speed and to infer the temporal pol-II activity profile at the gene promoter. Model parameters are estimated using either maximum likelihood estimation or via Bayesian inference using Markov chain Monte Carlo sampling. The Bayesian approach provides confidence intervals for parameter estimates and allows the use of priors that capture domain knowledge, e.g. the expected range of transcription speeds, based on previous experiments. The model describes the movement of pol-II down the gene body and can be used to identify the time of induction for transcriptionally engaged genes. By clustering the inferred promoter activity time profiles, we are able to determine which genes respond quickly to stimuli and group genes that share activity profiles and may therefore be co-regulated. We apply our methodology to biological data obtained using ChIP-seq to measure pol-II occupancy genome-wide when MCF-7 human breast cancer cells are treated with estradiol (E2. The transcription speeds we obtain agree with those obtained previously for smaller numbers of genes with the advantage that our approach can be applied genome-wide. We validate the biological significance of the pol-II promoter activity clusters by investigating cluster-specific transcription factor binding patterns and determining canonical pathway enrichment. We find that rapidly induced genes are enriched for both estrogen receptor alpha (ERα and FOXA1 binding in their proximal promoter regions.

  20. SOUTH POL: Revealing the Polarized Southern Sky

    Science.gov (United States)

    Magalhaes, Antonio Mario Mario; Ramírez, Edgar; Ribeiro, Nadili; Seriacopi, Daiane; Rubinho, Marcelo; Ferrari, Tiberio; Rodrigues, Claudia; Schoenell, William; Herpich, Fabio; Pereyra, Antonio

    2018-01-01

    SOUTH POL will be a survey of the Southern sky in optical polarized light. It will use a newly built polarimeter for T80-S, an 84 cm robotic telescope installed at Cerro Tololo (CTIO), Chile. It will initially cover the sky South of declination -15 deg with a polarimetric accuracy Solar System.The polarimeter has just been commissioned in mid-November, 2017. The data reduction pipeline has already been built. We will describe the instrument and the data reduction, as well as a few of the science cases. The survey is expected to begin midway through the 1st semester of 2018. Both catalog data and raw images will be made available.

  1. Cultura e políticas sociais : uma visão a partir da cultura política

    OpenAIRE

    Corrêa, Helena Ariane Borges

    2008-01-01

    A dissertação parte do questionamento de por que fatores culturais não são considerados na formulação de políticas públicas. Para tanto são analisadas e discutidas duas vertentes tradicionalmente separadas na ciência política: culturalismo e institucionalismo, que aqui serão trabalhadas em um nível de análise menos abstrato, relacionando elementos de cultura política com políticas públicas. Com isto o trabalho procura mostrar a relevância do estudo de fatores culturais em políticas sociais e ...

  2. Expression of paralogous SEP-, FUL-, AG- and STK-like MADS-box genes in wild-type and peloric Phalaenopsis flowers.

    Directory of Open Access Journals (Sweden)

    Roberta eAcri-Nunes-Miranda

    2014-03-01

    Full Text Available The diverse flowers of Orchidaceae are the result of several major morphological transitions, among them the most studied is the differentiation of the inner median tepal into the labellum, a perianth organ key in pollinator attraction. Type A peloria lacking stamens and with ectopic labella in place of inner lateral tepals are useful for testing models on the genes specifying these organs by comparing their patterns of expression between wild-type and peloric flowers. Previous studies focused on DEFICIENS and GLOBOSA-like MADS-box genes because of their conserved role in perianth and stamen development. The ‘orchid code’ model summarizes this work and shows in Orchidaceae there are four paralogous lineages of DEFICIENS/AP3-like genes differentially expressed in each floral whorl. Experimental tests of this model showed the conserved, higher expression of genes from two specific DEF-like gene lineages is associated with labellum development. The present study tests whether eight MADS-box candidate SEP-, FUL-, AG- and STK-like genes have been specifically duplicated in the Orchidaceae and are also differentially expressed in association with the distinct flower organs of Phalaenopsis hyb. Athens. The gene trees indicate orchid-specific duplications. In a way analogous to what is observed in labellum-specific DEF-like genes, a two-fold increase in the expression of SEP3-like gene PhaMADS7 was measured in the labellum-like inner lateral tepals of peloric flowers. The overlap between SEP3-like and DEF-like genes suggests both are associated with labellum specification and similar positional cues determine their domains of expression. In contrast, the uniform messenger levels of FUL-like genes suggest they are involved in the development of all organs and their expression in the ovary suggests cell differentiation starts before pollination. As previously reported AG-like and STK-like are exclusively expressed in gynostemium and ovary, however no

  3. Similar but not the same: insights into the evolutionary history of paralogous sex-determining genes of the dwarf honey bee Apis florea.

    Science.gov (United States)

    Biewer, M; Lechner, S; Hasselmann, M

    2016-01-01

    Studying the fate of duplicated genes provides informative insight into the evolutionary plasticity of biological pathways to which they belong. In the paralogous sex-determining genes complementary sex determiner (csd) and feminizer (fem) of honey bee species (genus Apis), only heterozygous csd initiates female development. Here, the full-length coding sequences of the genes csd and fem of the phylogenetically basal dwarf honey bee Apis florea are characterized. Compared with other Apis species, remarkable evolutionary changes in the formation and localization of a protein-interacting (coiled-coil) motif and in the amino acids coding for the csd characteristic hypervariable region (HVR) are observed. Furthermore, functionally different csd alleles were isolated as genomic fragments from a random population sample. In the predicted potential specifying domain (PSD), a high ratio of πN/πS=1.6 indicated positive selection, whereas signs of balancing selection, commonly found in other Apis species, are missing. Low nucleotide diversity on synonymous and genome-wide, non-coding sites as well as site frequency analyses indicated a strong impact of genetic drift in A. florea, likely linked to its biology. Along the evolutionary trajectory of ~30 million years of csd evolution, episodic diversifying selection seems to have acted differently among distinct Apis branches. Consistently low amino-acid differences within the PSD among pairs of functional heterozygous csd alleles indicate that the HVR is the most important region for determining allele specificity. We propose that in the early history of the lineage-specific fem duplication giving rise to csd in Apis, A. florea csd stands as a remarkable example for the plasticity of initial sex-determining signals.

  4. Clusters of ancestrally related genes that show paralogy in whole or in part are a major feature of the genomes of humans and other species.

    Directory of Open Access Journals (Sweden)

    Michael B Walker

    Full Text Available Arrangements of genes along chromosomes are a product of evolutionary processes, and we can expect that preferable arrangements will prevail over the span of evolutionary time, often being reflected in the non-random clustering of structurally and/or functionally related genes. Such non-random arrangements can arise by two distinct evolutionary processes: duplications of DNA sequences that give rise to clusters of genes sharing both sequence similarity and common sequence features and the migration together of genes related by function, but not by common descent. To provide a background for distinguishing between the two, which is important for future efforts to unravel the evolutionary processes involved, we here provide a description of the extent to which ancestrally related genes are found in proximity.Towards this purpose, we combined information from five genomic datasets, InterPro, SCOP, PANTHER, Ensembl protein families, and Ensembl gene paralogs. The results are provided in publicly available datasets (http://cgd.jax.org/datasets/clustering/paraclustering.shtml describing the extent to which ancestrally related genes are in proximity beyond what is expected by chance (i.e. form paraclusters in the human and nine other vertebrate genomes, as well as the D. melanogaster, C. elegans, A. thaliana, and S. cerevisiae genomes. With the exception of Saccharomyces, paraclusters are a common feature of the genomes we examined. In the human genome they are estimated to include at least 22% of all protein coding genes. Paraclusters are far more prevalent among some gene families than others, are highly species or clade specific and can evolve rapidly, sometimes in response to environmental cues. Altogether, they account for a large portion of the functional clustering previously reported in several genomes.

  5. A Polícia e suas Polícias: Clientela, Hierarquia, Soldado e Bandido

    Directory of Open Access Journals (Sweden)

    Erika Ferreira de Azevedo

    Full Text Available Resumo A polícia militar representa um braço do Estado e apresenta-se para a população de forma contundente, ostensiva e, por vezes, brutal, não só para a sociedade como para ela mesma. Através da Análise Institucional do Discurso, a pesquisa aqui relatada teve como objetivo estudar os efeitos de reconhecimento e desconhecimento das relações no trabalho que permeiam o discurso de soldados da polícia militar: como estes falam de seu trabalho e, através desta fala, posicionam-se e posicionam sua clientela, sua hierarquia, seu objeto de trabalho (os “bandidos” e eles próprios. Buscou-se também analisar que lugar a violência ocupou neste discurso. Dez soldados da polícia militar do Estado de São Paulo foram entrevistados e a transcrição destas estrevistas foi analisada. A partir das análises, é possível refletir sobre a dubiedade do verdadeiro objetivo do trabalho policial, deslizando facilmente do cuidado da população desamparada ao cuidado de si, desamparado sob a pressão da farda.

  6. La memoria social y la memoria política

    OpenAIRE

    Lifschitz, Javier Alejandro

    2012-01-01

    El artículo trata sobre la constitución del campo de la memoria política. Discute inicialmente la perspectiva de la memoria social y aborda, a partir de autores como Bourdieu y Habermas, la idea de un campo de la memoria política. Identifica dos momentos de inflexión en la constitución de ese campo. Un primer momento, en que la memoria política se inscribe en los procesos estatales de construcción de una memoria nacional y un segundo momento, que tiene como referencia principalmente el contex...

  7. Arma del contrapoder: Humor político y medios

    OpenAIRE

    César Ulloa Tapia

    2008-01-01

    El humor político en los medios de comunicación tiene enorme acogida en las audiencias ya que logra lo que pueden editoriales, análisis académicos y demás espacios de opinión. Es la mejor manera de denunciar, advertir, sancionar e incluso develar lo que hace o deja de hacer el poder político. El humor político está considerado como contrapoder. El periodismo que usa el humor es eficaz, tanto en el mensaje como en su efecto, pues describe las situaciones y recurre a comparaciones y símiles....

  8. Copper (II)

    African Journals Online (AJOL)

    CLEMENT O BEWAJI

    Valine (2 - amino - 3 – methylbutanoic acid), is a chemical compound containing .... Stability constant (Kf). Gibb's free energy. ) (. 1. −. ∆. Mol. JG. [CuL2(H2O)2] ... synthesis and characterization of Co(ii), Ni(ii), Cu (II), and Zn(ii) complexes with ...

  9. Influenza Virus Mounts a Two-Pronged Attack on Host RNA Polymerase II Transcription.

    Science.gov (United States)

    Bauer, David L V; Tellier, Michael; Martínez-Alonso, Mónica; Nojima, Takayuki; Proudfoot, Nick J; Murphy, Shona; Fodor, Ervin

    2018-05-15

    Influenza virus intimately associates with host RNA polymerase II (Pol II) and mRNA processing machinery. Here, we use mammalian native elongating transcript sequencing (mNET-seq) to examine Pol II behavior during viral infection. We show that influenza virus executes a two-pronged attack on host transcription. First, viral infection causes decreased Pol II gene occupancy downstream of transcription start sites. Second, virus-induced cellular stress leads to a catastrophic failure of Pol II termination at poly(A) sites, with transcription often continuing for tens of kilobases. Defective Pol II termination occurs independently of the ability of the viral NS1 protein to interfere with host mRNA processing. Instead, this termination defect is a common effect of diverse cellular stresses and underlies the production of previously reported downstream-of-gene transcripts (DoGs). Our work has implications for understanding not only host-virus interactions but also fundamental aspects of mammalian transcription. Copyright © 2018 The Author(s). Published by Elsevier Inc. All rights reserved.

  10. Lo social desde la política

    Directory of Open Access Journals (Sweden)

    Darío Salinas Figueredo

    2000-01-01

    Full Text Available Sin desconocer las aproximaciones existentes sobre aspectos fundamentales de la problemática social en América Latina, por ejemplo la pobreza y la índole de política que de manera predominante se formula para encararla, la trayectoria argumental de este trabajo se encamina a mostrar la importancia de trabajar hacia el desarrollo de una perspectiva más amplia. Las referencias empíricas cotejadas no se refieren a hechos puntuales, sino a indicadores que pautan tendencias. Siendo los propósitos aquí reunidos de naturaleza comprensiva, se parte de la premisa según la cual escasamente se problematiza lo social y la propia política social, sus vínculos con la política general, el modelo de desarrollo y el tipo de democracia que la política predominante busca proyectar.

  11. GCPII Variants, Paralogs and Orthologs

    Czech Academy of Sciences Publication Activity Database

    Hlouchová, Klára; Navrátil, Václav; Tykvart, Jan; Šácha, Pavel; Konvalinka, Jan

    2012-01-01

    Roč. 19, č. 9 (2012), s. 1316-1322 ISSN 0929-8673 R&D Projects: GA ČR GAP304/12/0847 Institutional research plan: CEZ:AV0Z40550506 Keywords : PSMA * GCPIII * NAALADase L * splice variants * homologs * PSMAL Subject RIV: CE - Biochemistry Impact factor: 4.070, year: 2012

  12. Murine mammary tumor virus pol-related sequences in human DNA: characterization and sequence comparison with the complete murine mammary tumor virus pol gene

    International Nuclear Information System (INIS)

    Deen, K.C.; Sweet, R.W.

    1986-01-01

    Sequences in the human genome with homology to the murine mammary tumor virus (MMTV) pol gene were isolated from a human phage library. Ten clones with extensive pol homology were shown to define five separate loci. These loci share common sequences immediately adjacent to the pol-like segments and, in addition, contain a related repeat element which bounds this region. This organization is suggestive of a proviral structure. The authors estimate that the human genome contains 30 to 40 copies of these pol-related sequences. The pol region of one of the cloned segments (HM16) and the complete MMTV pol gene were sequenced and compared. The nucleotide homology between these pol sequences is 52% and is concentrated in the terminal regions. The MMTV pol gene contains a single long open reading frame encoding 899 amino acids and is demarcated from the partially overlapping putative gag gene by termination codons and a shift in translational reading frame. The pol sequence of HM16 is multiply terminated but does contain open reading frames which encode 370, 105, and 112 amino acids residues in separate reading frames. The authors deduced a composite pol protein sequence for HM16 by aligning it to the MMTV pol gene and then compared these sequences with other retroviral pol protein sequences. Conserved sequences occur in both the amino and carboxyl regions which lie within the polymerase and endonuclease domains of pol, respectively

  13. Politeia: la política

    Directory of Open Access Journals (Sweden)

    Manuel Briceño Jáuregui

    1982-07-01

    Full Text Available Se trata solamente de La Política, una versión reciente que está en proceso de publicación. Aristóteles sostiene que la felicidad completa del individuo no es posible sino en la sociedad, especialmente en la polis, que es la sociedad por excelencia. El individuo no puede por sí mismo satisfacer sus necesidad es materiales ni alcanzar la virtud. Para mostrarlo examina primero los diferentes grupos humanos, a partir de la familia; analiza luego las diversas politeias (constituciones de entonces, algunas de las cuales condena. Distingue siguiendo a su maestro Platón tres politeias (formas de gobierno legítimas monarquía, aristocracia, democracia, que dan lugar a su vez a tres desviaciones de las mismas tiranía , oligarquía y demagogia respectivamente. Termina señalando la importancia humana y cívica de la educación.

  14. Expression of paralogous SEP-, FUL-, AG- and STK-like MADS-box genes in wild-type and peloric Phalaenopsis flowers.

    Science.gov (United States)

    Acri-Nunes-Miranda, Roberta; Mondragón-Palomino, Mariana

    2014-01-01

    The diverse flowers of Orchidaceae are the result of several major morphological transitions, among them the most studied is the differentiation of the inner median tepal into the labellum, a perianth organ key in pollinator attraction. Type A peloria lacking stamens and with ectopic labella in place of inner lateral tepals are useful for testing models on the genes specifying these organs by comparing their patterns of expression between wild-type and peloric flowers. Previous studies focused on DEFICIENS- and GLOBOSA-like MADS-box genes because of their conserved role in perianth and stamen development. The "orchid code" model summarizes this work and shows in Orchidaceae there are four paralogous lineages of DEFICIENS/AP3-like genes differentially expressed in each floral whorl. Experimental tests of this model showed the conserved, higher expression of genes from two specific DEF-like gene lineages is associated with labellum development. The present study tests whether eight MADS-box candidate SEP-, FUL-, AG-, and STK-like genes have been specifically duplicated in the Orchidaceae and are also differentially expressed in association with the distinct flower organs of Phalaenopsis hyb. "Athens." The gene trees indicate orchid-specific duplications. In a way analogous to what is observed in labellum-specific DEF-like genes, a two-fold increase in the expression of SEP3-like gene PhaMADS7 was measured in the labellum-like inner lateral tepals of peloric flowers. The overlap between SEP3-like and DEF-like genes suggests both are associated with labellum specification and similar positional cues determine their domains of expression. In contrast, the uniform messenger levels of FUL-like genes suggest they are involved in the development of all organs and their expression in the ovary suggests cell differentiation starts before pollination. As previously reported AG-like and STK-like genes are exclusively expressed in gynostemium and ovary, however no evidence for

  15. Selection Signatures in the First Exon of Paralogous Receptor Kinase Genes from the Sym2 Region of the Pisum sativum L. Genome

    Directory of Open Access Journals (Sweden)

    Anton S. Sulima

    2017-11-01

    Full Text Available During the initial step of the symbiosis between legumes (Fabaceae and nitrogen-fixing bacteria (rhizobia, the bacterial signal molecule known as the Nod factor (nodulation factor is recognized by plant LysM motif-containing receptor-like kinases (LysM-RLKs. The fifth chromosome of barrel medic (Medicago truncatula Gaertn. contains a cluster of paralogous LysM-RLK genes, one of which is known to participate in symbiosis. In the syntenic region of the pea (Pisum sativum L. genome, three genes have been identified: PsK1 and PsSym37, two symbiosis-related LysM-RLK genes with known sequences, and the unsequenced PsSym2 gene which presumably encodes a LysM-RLK and is associated with increased selectivity to certain Nod factors. In this work, we identified a new gene encoding a LysM-RLK, designated as PsLykX, within the Sym2 genomic region. We sequenced the first exons (corresponding to the protein receptor domain of PsSym37, PsK1, and PsLykX from a large set of pea genotypes of diverse origin. The nucleotide diversity of these fragments was estimated and groups of haplotypes for each gene were revealed. Footprints of selection pressure were detected via comparative analyses of SNP distribution across the first exons of these genes and their homologs MtLYK2, MtLYK3, and MtLYK4 from M. truncatula retrieved from the Medicago Hapmap project. Despite the remarkable similarity among all the studied genes, they exhibited contrasting selection signatures, possibly pointing to diversification of their functions. Signatures of balancing selection were found in LysM1-encoding parts of PsSym37 and PsK1, suggesting that the diversity of these parts may be important for pea LysM-RLKs. The first exons of PsSym37 and PsK1 displayed signatures of purifying selection, as well as MtLYK2 of M. truncatula. Evidence of positive selection affecting primarily LysM domains was found in all three investigated M. truncatula genes, as well as in the pea gene PsLykX. The data

  16. Evaluation of recombinant Mycoplasma hyopneumoniae P97/P102 paralogs formulated with selected adjuvants as vaccines against mycoplasmal pneumonia in pigs.

    Science.gov (United States)

    Woolley, Lauren K; Fell, Shayne A; Gonsalves, Jocelyn R; Raymond, Benjamin B A; Collins, Damian; Kuit, Tracey A; Walker, Mark J; Djordjevic, Steven P; Eamens, Graeme J; Jenkins, Cheryl

    2014-07-23

    Pig responses to recombinant subunit vaccines containing fragments of eight multifunctional adhesins of the Mycoplasma hyopneumoniae (Mhp) P97/P102 paralog family formulated with Alhydrogel(®) or Montanide™ Gel01 were compared with a commercial bacterin following experimental challenge. Pigs, vaccinated intramuscularly at 9, 12 and 15 weeks of age with either of the recombinant formulations (n=10 per group) or Suvaxyn(®) M. hyo (n=12), were challenged with Mhp strain Hillcrest at 17 weeks of age. Unvaccinated, challenged pigs (n=12) served as a control group. Coughing was assessed daily. Antigen-specific antibody responses were monitored by ELISA in serum and tracheobronchial lavage fluid (TBLF), while TBLF was also assayed for cytokine responses (ELISA) and bacterial load (qPCR). At slaughter, gross and histopathology of lungs were quantified and damage to epithelial cilia in the porcine trachea was evaluated by scanning electron microscopy. Suvaxyn(®) M. hyo administration induced significant serological responses against Mhp strain 232 whole cell lysates (wcl) and recombinant antigen F3P216, but not against the remaining vaccine subunit antigens. Alhydrogel(®) and Montanide™ Gel01-adjuvanted antigen induced significant antigen-specific IgG responses, with the latter adjuvant eliciting comparable Mhp strain 232 wcl specific IgG responses to Suvaxyn(®) M. hyo. No significant post-vaccination antigen-specific mucosal responses were detected with the recombinant vaccinates. Suvaxyn(®) M. hyo was superior in reducing clinical signs, lung lesion severity and bacterial load but the recombinant formulations offered comparable protection against cilial damage. Lower IL-1β, TNF-α and IL-6 responses after challenge were associated with reduced lung lesion severity in Suvaxyn(®) M. hyo vaccinates, while elevated pathology scores in recombinant vaccinates corresponded to cytokine levels that were similarly elevated as in unvaccinated pigs. This study highlights

  17. An exceptional horizontal gene transfer in plastids: gene replacement by a distant bacterial paralog and evidence that haptophyte and cryptophyte plastids are sisters

    Directory of Open Access Journals (Sweden)

    Palmer Jeffrey D

    2006-09-01

    Full Text Available Abstract Background Horizontal gene transfer (HGT to the plant mitochondrial genome has recently been shown to occur at a surprisingly high rate; however, little evidence has been found for HGT to the plastid genome, despite extensive sequencing. In this study, we analyzed all genes from sequenced plastid genomes to unearth any neglected cases of HGT and to obtain a measure of the overall extent of HGT to the plastid. Results Although several genes gave strongly supported conflicting trees under certain conditions, we are confident of HGT in only a single case beyond the rubisco HGT already reported. Most of the conflicts involved near neighbors connected by long branches (e.g. red algae and their secondary hosts, where phylogenetic methods are prone to mislead. However, three genes – clpP, ycf2, and rpl36 – provided strong support for taxa moving far from their organismal position. Further taxon sampling of clpP and ycf2 resulted in rejection of HGT due to long-branch attraction and a serious error in the published plastid genome sequence of Oenothera elata, respectively. A single new case, a bacterial rpl36 gene transferred into the ancestor of the cryptophyte and haptophyte plastids, appears to be a true HGT event. Interestingly, this rpl36 gene is a distantly related paralog of the rpl36 type found in other plastids and most eubacteria. Moreover, the transferred gene has physically replaced the native rpl36 gene, yet flanking genes and intergenic regions show no sign of HGT. This suggests that gene replacement somehow occurred by recombination at the very ends of rpl36, without the level and length of similarity normally expected to support recombination. Conclusion The rpl36 HGT discovered in this study is of considerable interest in terms of both molecular mechanism and phylogeny. The plastid acquisition of a bacterial rpl36 gene via HGT provides the first strong evidence for a sister-group relationship between haptophyte and

  18. An exceptional horizontal gene transfer in plastids: gene replacement by a distant bacterial paralog and evidence that haptophyte and cryptophyte plastids are sisters

    Science.gov (United States)

    Rice, Danny W; Palmer, Jeffrey D

    2006-01-01

    Background Horizontal gene transfer (HGT) to the plant mitochondrial genome has recently been shown to occur at a surprisingly high rate; however, little evidence has been found for HGT to the plastid genome, despite extensive sequencing. In this study, we analyzed all genes from sequenced plastid genomes to unearth any neglected cases of HGT and to obtain a measure of the overall extent of HGT to the plastid. Results Although several genes gave strongly supported conflicting trees under certain conditions, we are confident of HGT in only a single case beyond the rubisco HGT already reported. Most of the conflicts involved near neighbors connected by long branches (e.g. red algae and their secondary hosts), where phylogenetic methods are prone to mislead. However, three genes – clpP, ycf2, and rpl36 – provided strong support for taxa moving far from their organismal position. Further taxon sampling of clpP and ycf2 resulted in rejection of HGT due to long-branch attraction and a serious error in the published plastid genome sequence of Oenothera elata, respectively. A single new case, a bacterial rpl36 gene transferred into the ancestor of the cryptophyte and haptophyte plastids, appears to be a true HGT event. Interestingly, this rpl36 gene is a distantly related paralog of the rpl36 type found in other plastids and most eubacteria. Moreover, the transferred gene has physically replaced the native rpl36 gene, yet flanking genes and intergenic regions show no sign of HGT. This suggests that gene replacement somehow occurred by recombination at the very ends of rpl36, without the level and length of similarity normally expected to support recombination. Conclusion The rpl36 HGT discovered in this study is of considerable interest in terms of both molecular mechanism and phylogeny. The plastid acquisition of a bacterial rpl36 gene via HGT provides the first strong evidence for a sister-group relationship between haptophyte and cryptophyte plastids to the

  19. Política y Geometría

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    Isabel Lillo Villalobos

    2011-04-01

    Full Text Available En este trabajo se aplican conceptos matemáticos al planteamiento deun problema de competición política. Se desarrolla y se implementaademás un método que usa herramientas relacionadas con la geometríacomputacional para la resolución de dicho problema, probándose dicho método en un ejemplo basado en la política española.

  20. Cultura política y partidos en Jalisco

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    Carlos Silva Moreno

    2000-01-01

    Full Text Available El presente trabajo es un intento de análisis y reflexión sobre la cultura política de uno de los componentes de todo sistema político que se precie de ser democrático (al menos formalmente: los partidos políticos. Se estudia la cultura política de los partidos políticos en Jalisco a partir del análisis de las representaciones y valores que los partidos políticos tienen sobre la democracia interna, para después contrastarlas con algunas prácticas referentes al liderazgo, dirección y formas de competencia. Debido a que las dimensiones de la democracia son muy amplias y variadas, nos centramos en dos indicadores: la forma en que se da la competencia por los cargos de dirección interna y el carácter de la dirección y el liderazgo.

  1. Fluctuations of pol I and fibrillarin contents of the nucleoli.

    Science.gov (United States)

    Hornáček, M; Kováčik, L; Mazel, T; Cmarko, D; Bártová, E; Raška, I; Smirnov, E

    2017-07-04

    Nucleoli are formed on the basis of ribosomal DNA (rDNA) clusters called Nucleolus Organizer Regions (NORs). Each NOR contains multiple genes coding for RNAs of the ribosomal particles. The prominent components of the nucleolar ultrastructure, fibrillar centers (FC) and dense fibrillar components (DFC), together compose FC/DFC units. These units are centers of rDNA transcription by RNA polymerase I (pol I), as well as the early processing events, in which an essential role belongs to fibrillarin. Each FC/DFC unit probably corresponds to a single transcriptionally active gene. In this work, we transfected human-derived cells with GFP-RPA43 (subunit of pol I) and RFP-fibrillarin. Following changes of the fluorescent signals in individual FC/DFC units, we found two kinds of kinetics: 1) the rapid fluctuations with periods of 2-3 min, when the pol I and fibrillarin signals oscillated in anti-phase manner, and the intensities of pol I in the neighboring FC/DFC units did not correlate. 2) fluctuations with periods of 10 to 60 min, in which pol I and fibrillarin signals measured in the same unit did not correlate, but pol I signals in the units belonging to different nucleoli were synchronized. Our data indicate that a complex pulsing activity of transcription as well as early processing is common for ribosomal genes.

  2. Herencia política y económica

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    Wesley C. Marshall

    2011-01-01

    Full Text Available El artículo busca resaltar la relevancia de la vida política de Hilferding en el actual contexto de la crisis financiera global y la probablemente alta radicalización de las posiciones políticas de los países dominantes como resultado de aquella. Como se argumenta, había un alto grado de coherencia entre el pensamiento económico de Hilferding y su actuación política. Justamente por el hecho de que el proyecto socialista alemán durante la Republica Weimar no logró sus objetivos, el pensamiento político y económico de su líder intelectual es altamente relevante en el escenario global actual, donde la crisis económica y descomposición social y política que la acompañen reclaman a los principales políticos del mundo un entendimiento económico más amplio y profundo para que las tragedias de Europa central de los años treinta y cuarenta del siglo XX no se reproduzcan.

  3. Mentir en la vida política

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    Martínez de la Escalera, Ana María

    2005-06-01

    Full Text Available In this paper the act of lying is seen as a necessary component of the political discourse of the polis. Plato and Arendt are examined as the representatives of a line of thought in which the political realm needs the act of lying. The actual problematic of lying in politics is debated.

    El texto «Mentir en política» aborda el papel que la mentira ha jugado en el lenguaje de la política y el lugar problemático que la Filosofía política le ha otorgado. Se escogen dos autores, Platón y Arendt, para mostrar la necesidad de incluir el discurso mentiroso como un componente esencial de la vida política de la ciudad. En breve, se trata de analizar los límites que la ciudad impone al discurso de lo político y de la política.

  4. Mitochondrial DNA replication: a PrimPol perspective

    Science.gov (United States)

    Bailey, Laura J.

    2017-01-01

    PrimPol, (primase–polymerase), the most recently identified eukaryotic polymerase, has roles in both nuclear and mitochondrial DNA maintenance. PrimPol is capable of acting as a DNA polymerase, with the ability to extend primers and also bypass a variety of oxidative and photolesions. In addition, PrimPol also functions as a primase, catalysing the preferential formation of DNA primers in a zinc finger-dependent manner. Although PrimPol's catalytic activities have been uncovered in vitro, we still know little about how and why it is targeted to the mitochondrion and what its key roles are in the maintenance of this multicopy DNA molecule. Unlike nuclear DNA, the mammalian mitochondrial genome is circular and the organelle has many unique proteins essential for its maintenance, presenting a differing environment within which PrimPol must function. Here, we discuss what is currently known about the mechanisms of DNA replication in the mitochondrion, the proteins that carry out these processes and how PrimPol is likely to be involved in assisting this vital cellular process. PMID:28408491

  5. A questão da continuidade da política macroeconômica entre o governo Cardoso e Lula (1995-2006

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    José Marcos Nayme Novelli

    2010-06-01

    Full Text Available O objetivo do artigo é compreender a continuidade da política macroeconômica entre o governo Cardoso e o governo Lula. O artigo organiza-se em três seções. Na primeira, descreve-se sucintamente a política macroeconômica dos governos Cardoso e Lula. Na segunda, apresenta-se e discute-se o debate da literatura especializada a respeito da hipótese da continuidade da política macroeconômica entre os dois governos. Na terceira seção, é feito um mapeamento dos dirigentes estatais, em que ressaltamos certos aspectos que contribuíram para tal continuidade entre os dois governos. Sem desconsiderar a ação dos beneficiários últimos dos resultados de tal política, identificamos três fatores para explicar a manutenção da política macroeconômica: i a própria estrutura do capitalismo brasileiro e sua inserção na economia mundial; ii a força das idéias ortodoxas difundidas pela mídia e dominantes na equipe econômica (Ministério da Fazenda e Banco Central do Brasil, que foi recrutada no mesmo "campo"; iii a aceitação das "regras do jogo" da democracia pelo Partido dos Trabalhadores (PT.

  6. Water absorbent polymer in sugarcane crop Polímeros hidroabsorventes em cultura canavieira

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    Tadeu A. Marques

    2013-02-01

    Full Text Available The water absorbent polymer effect on vegetative growth and production of Theoretical Recovery Sugar (TRS of sugarcane cv. RB 86 7515 was evaluated on two field tests installed in randomized blocks, with four treatments and five repetitions. The polymer doses were 0; 4; 8 and 12 g m-1 of furrow (test 1 and 0; 1.4; 2.8 and 4.2 g m-1 of furrow (test 2. Test 1 (dec/2007 to may/2009 was implanted in a Distroferric Red Argisol soil in Presidente Prudente - State of São Paulo (SP, Brazil; and the test 2 (Aug/2008 to Aug/2009 was implanted in a Red Yellow Argisol soil in Lucélia - State of São Paulo (SP, Brazil. In test 2, there were no significant differences for any evaluated parameters. In both tests the polymer doses equal to or less than 4 g m-1 of furrow showed no significant effect on the evaluated parameters. In test 1, the polymer doses of 8 and 12 g m-1 of the conditioning polymer increased the number of tillers in stage II of development and led to the largest amount of straw. The gross income per hectare has positive relation with the polymer doses. The polymer had no significant effect on the sugarcane stems productivity and technological parameters.Avaliou-se o efeito de um polímero hidroabsorvente no crescimento vegetativo e na produção de açúcares teoricamente recuperáveis (ATR de cana-de-açúcar cv. RB 86 7515, em dois ensaios de campo instalados em blocos inteiramente casualizados, com quatro tratamentos e cinco repetições. As doses do polímero foram 0; 4; 8 e 12 g m-1 sulco (ensaio 1 e 0; 1,4; 2,8 e 4,2 g m-1 sulco (ensaio 2. O ensaio 1 (dez/2007 a maio/2009 foi implantado em Argissolo Vermelho Distroférrico, em Presidente Prudente - SP, e o ensaio 2 (ago./2008 a ago./2009 em Argissolo Vermelho-Amarelo, em Lucélia - SP. No ensaio 2, não houve diferenças significativas para nenhum dos parâmetros avaliados. Em ambos os ensaios, doses do polímero iguais ou inferiores a 4 g m-1 de sulco não apresentaram efeito

  7. Estudo Pré-Clínico de Stent com Polímero Biodegradável e Liberação Abluminal de Sirolimus

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    Celso Kiyochi Takimura

    2014-06-01

    Full Text Available Fundamento: Stents recobertos com polímeros bioabsorvíveis e fármacos apenas na face abluminal podem ser mais seguros que stents farmacológicos com polímeros permanentes. Objetivo: Relatar os resultados experimentais com o stent Inspiron(r, um stent recoberto com polímero bioabsorvível e com liberação de sirolimus apenas da face abluminal, recentemente aprovado para uso clínico. Métodos: Foram implantados 45 stents nas artérias coronárias de 15 porcos e, no 28° dia pós-implante, foram obtidos os resultados angiográficos, de ultrassonografia intracoronária e de histomorfologia. Cinco grupos foram avaliados: Grupo I (nove stents sem recobrimento; Grupo II (nove stents com polímero bioabsorvível nas faces luminal e abluminal; Grupo III (oito stents com polímero bioabsorvível na face abluminal; Grupo IV (nove stents com polímero bioabsorvível e sirolimus nas faces luminal e abluminal; e Grupo V (dez stents com polímero bioabsorvível e sirolimus na face abluminal exclusivamente. Resultados: Observamos, para os Grupos I, II, III, IV e V respectivamente: porcentual de estenose de 29 ± 20; 36 ± 14; 33 ± 19; 22 ± 13 e 26 ± 15 (p = 0,443; perda luminal tardia (em mm de 1,02 ± 0,60; 1,24 ± 0,48; 1,11 ± 0,54; 0,72 ± 0,44 e 0,78 ± 0,39 (p = 0,253; área neointimal (em mm2 de 2,60 ± 1,99; 2,74 ± 1,51; 2,74 ± 1,30; 1,30 ± 1,14 e 0,97 ± 0,84 (p = 0,001; Grupos IV e V versus Grupos I, II e III e porcentual de área neointimal de 35 ± 25; 38 ± 18; 39 ± 19; 19 ± 18 e 15 ± 12 (p = 0,001; Grupo IV e V versus Grupo I, II e III. Os escores de injúria e inflamação foram baixos e sem diferenças entre os grupos. Conclusão: O stent Inspiron(r foi seguro e inibiu significativamente a hiperplasia neointimal observada no 28° dia pós-implante em artérias coronárias porcinas.

  8. Architecture of the RNA polymerase II-Mediator core initiation complex.

    Science.gov (United States)

    Plaschka, C; Larivière, L; Wenzeck, L; Seizl, M; Hemann, M; Tegunov, D; Petrotchenko, E V; Borchers, C H; Baumeister, W; Herzog, F; Villa, E; Cramer, P

    2015-02-19

    The conserved co-activator complex Mediator enables regulated transcription initiation by RNA polymerase (Pol) II. Here we reconstitute an active 15-subunit core Mediator (cMed) comprising all essential Mediator subunits from Saccharomyces cerevisiae. The cryo-electron microscopic structure of cMed bound to a core initiation complex was determined at 9.7 Å resolution. cMed binds Pol II around the Rpb4-Rpb7 stalk near the carboxy-terminal domain (CTD). The Mediator head module binds the Pol II dock and the TFIIB ribbon and stabilizes the initiation complex. The Mediator middle module extends to the Pol II foot with a 'plank' that may influence polymerase conformation. The Mediator subunit Med14 forms a 'beam' between the head and middle modules and connects to the tail module that is predicted to bind transcription activators located on upstream DNA. The Mediator 'arm' and 'hook' domains contribute to a 'cradle' that may position the CTD and TFIIH kinase to stimulate Pol II phosphorylation.

  9. Grupos Políticos Romanos (150-133 a.C.

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    Enrique GARCÍA RIAZA

    2009-11-01

    Full Text Available RESUMEN: Este trabajo analiza el tejido político de la aristocracia romana en los años centrales del siglo II a.C, momento en el que los condicionantes socio-económicos derivados de la expansión mediterránea generan, a un tiempo, un aumento de las reivindicaciones de la plebe, y una importante acentuación de las rivalidades internas en el seno de la aristocracia. Con estas premisas, abordamos el estudio de los grupos de solidaridad política constituidos en torno a determinados individuos y familias. La significación de la figura de Escipión Emiliano no debe ocultar el papel de Mételo Macedónico, de los Calpurnios Pisones y, especialmente, de los Claudio-Fulvios, quienes ensayarán, de forma paralela a Emiliano, una nueva vía de protagonismo basada en la política social. ABSTRACT: This paper deals with the political organization of the Roman aristocracy during the central years of the Ilnd. Century b.C. The Roman conquest of the Mediterranean World, achieved by means of a considerable military effort, was responsible of the development in Italy of new social and economical factors. The growing popular claims and the acentuation of aristocratical competition are the main features of this trend. A prosopographical research makes it clear that some relevant political groups have been traditionaly hidden because of an excesive focus on Scipio Aemilianus. Thus, Metellus Macedonicus, the Calpurnii Pisones and, above all, the Claudii-Fulvii played a decisive paper in the context of political struggle, and some of their members even shared with Scipio an interest in pro-popular politics.

  10. A compromised yeast RNA polymerase II enhances UV sensitivity in the absence of global genome nucleotide excision repair.

    Science.gov (United States)

    Wong, J M; Ingles, C J

    2001-02-01

    Nucleotide excision repair is the major pathway responsible for removing UV-induced DNA damage, and is therefore essential for cell survival following exposure to UV radiation. In this report, we have assessed the contributions of some components of the RNA polymerase II (Pol II) transcription machinery to UV resistance in Saccharomyces cerevisiae. Deletion of the gene encoding the Pol II elongation factor TFIIS (SII) resulted in enhanced UV sensitivity, but only in the absence of global genome repair dependent on the RAD7 and RAD16 genes, a result seen previously with deletions of RAD26 and RAD28, yeast homologs of the human Cockayne syndrome genes CSB and CSA, respectively. A RAD7/16-dependent reduction in survival after UV irradiation was also seen in the presence of mutations in RNA Pol II that confer a defect in its response to SII, as well as with other mutations which reside in regions of the largest subunit of Pol II not involved in SII interactions. Indeed, an increase in UV sensitivity was achieved by simply decreasing the steadystate level of RNA Pol II. Truncation of the C-terminal domain and other RNA Pol II mutations conferred sensitivity to the ribonucleotide reductase inhibitor hydroxyurea and induction of RNR1 and RNR2 mRNAs after UV irradiation was attenuated in these mutant cells. That UV sensitivity can be a consequence of mutations in the RNA Pol II machinery in yeast cells suggests that alterations in transcriptional programs could underlie some of the pathophysiological defects seen in the human disease Cockayne syndrome.

  11. Raymond Aron ante el maquiavelismo político

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    Molina Cano, Jerónimo

    2008-08-01

    Full Text Available It is a simplification of Raymond Aron´s thought to consider him as a mere neo-liberal political thinker. The French sociologist, a well-known political realist, took part in the famous controversy about Machiavellianism that was Aron´s intellectual watershed from the Forties. Starting from that controversy the aim of the present paper is to inquire into his contribution to the so-called “moderate Machiavellianism”, whose Arcanum is that it is not always possible to choose the optimal means to face the right political action. Machiavellianism is not a merely scientific or epistemological question, but something that deeply determines all political actions.

    La presentación de Raymond Aron como un escritor político neoliberal constituye una simplificación de su pensamiento. El sociólogo francés, que pertenece a la tradición del realismo político, tuvo una destacada intervención en la famosa polémica sobre el maquiavelismo que marcó un punto de inflexión en su pensamiento. Este artículo examina su contribución a esa inagotable polémica intelectual desde los años 40 y constata, finalmente, su encuadramiento en el denominado “maquiavelismo moderado”, cuyo arcano político es que, en política, no siempre se pueden elegir los medios de la acción. El maquiavelismo no es, en este sentido, un asunto científico o epistemológico, sino que determina profundamente toda acción política.

  12. (II) complexes

    African Journals Online (AJOL)

    activities of Schiff base tin (II) complexes. Neelofar1 ... Conclusion: All synthesized Schiff bases and their Tin (II) complexes showed high antimicrobial and ...... Singh HL. Synthesis and characterization of tin (II) complexes of fluorinated Schiff bases derived from amino acids. Spectrochim Acta Part A: Molec Biomolec.

  13. O neopragmatismo de Richard Rorty e a reflexão política contemporânea

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    Sérgio Eduardo Ferraz

    2014-03-01

    Full Text Available Este artigo examina o pensamento filosófico de Richard Rorty e, em particular, sua dimensão política, delineando seu tratamento original e crítico de temas centrais à teoria política contemporânea. O objetivo do texto é triplo: chamar a atenção para a fertilidade das ideias de um autor ainda pouco lido no Brasil (i, assinalar as notáveis consequências corrosivas da abordagem rortyana para pressupostos e pretensões fundantes de importantes vertentes da teoria política (ii, e, numa ótica mais positiva, apontar o potencial inspirador dos escritos desse autor para a reflexão sobre novos modos de justificação da democracia (iii. Salientam-se também, nesse último caso, os limites impostos a esse tipo de empreitada político-intelectual. A abordagem empregada consiste em demarcar os contornos gerais do projeto filosófico do autor, seguindo-se uma apresentação dos tópicos mais propriamente políticos da obra de Rorty. Mais especificamente, o artigo explora a proposta rortyana de substituição da noção de verdade pela de justificação, assinalando-se suas consequências para pretensões de verdade, objetividade e universalismo, presentes em diversas linhas da teoria política. Nesse veio, o artigo discute as eventuais implicações relativistas das teses rortyanas, chegando-se, por essa rota, às ideias de contingência, imaginação e persuasão, núcleos conceituais vitais à reflexão em tela. Um breve contraste com posições de autores como Habermas e Rawls, caros ao próprio Rorty, é esboçado no propósito de tornar mais clara a especificidade da abordagem rortyana da política. Transitando, do modo assinalado, por esses tópicos, o texto resulta em um panorama sintético da perspectiva rortyana acerca do que vem a ser, contemporaneamente, uma "política democrática", liberta de "universalismos" e "objetividades", na qual ganham estatuto decisivo questões de justificação, tolerância e coexist

  14. Orthoretroviral-like prototype foamy virus gag-pol expression is compatible with viral replication

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    Reh Juliane

    2011-08-01

    Full Text Available Abstract Background Foamy viruses (FVs unlike orthoretroviruses express Pol as a separate precursor protein and not as a Gag-Pol fusion protein. A unique packaging strategy, involving recognition of briding viral RNA by both Pol precursor and Gag as well as potential Gag-Pol protein interactions, ensures Pol particle encapsidation. Results Several Prototype FV (PFV Gag-Pol fusion protein constructs were generated to examine whether PFV replication is compatible with an orthoretroviral-like Pol expression. During their analysis, non-particle-associated secreted Pol precursor protein was discovered in extracellular wild type PFV particle preparations of different origin, copurifying in simple virion enrichment protocols. Different analysis methods suggest that extracellular wild type PFV particles contain predominantly mature p85PR-RT and p40IN Pol subunits. Characterization of various PFV Gag-Pol fusion constructs revealed that PFV Pol expression in an orthoretroviral manner is compatible with PFV replication as long as a proteolytic processing between Gag and Pol proteins is possible. PFV Gag-Pol translation by a HIV-1 like ribosomal frameshift signal resulted in production of replication-competent virions, although cell- and particle-associated Pol levels were reduced in comparison to wild type. In-frame fusion of PFV Gag and Pol ORFs led to increased cellular Pol levels, but particle incorporation was only marginally elevated. Unlike that reported for similar orthoretroviral constructs, a full-length in-frame PFV Gag-Pol fusion construct showed wildtype-like particle release and infectivity characteristics. In contrast, in-frame PFV Gag-Pol fusion with C-terminal Gag ORF truncations or non-removable Gag peptide addition to Pol displayed wildtype particle release, but reduced particle infectivity. PFV Gag-Pol precursor fusion proteins with inactivated protease were highly deficient in regular particle release, although coexpression of p71Gag

  15. La ciencia política, ciencia noética del orden.

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    Felipe Cárdenas Támara.

    2010-07-01

    Full Text Available This work has the following fundamental purposes: i to respond by way of a critical review to the statements on political science's object of study made by Rodrigo Losada and Andrés Casas in their recently published book Enfoques para el análisis político. Historia, epistemología y perspectivas de la ciencia política (Approaches for Political Analysis. History, Epistemology and Perspectives of Political Science, 2008; ii to reflect on the theoretical reductionism in the conceptualization of the object of study of political science, present in some contemporary schools of thought, and, iii to suggest the need to expand our understanding of our political reality from the intellectual perspective proposed by Eric Voegelin, who argued that political science is a noetic scientific discipline centered on the study of order and the experience of order in societies and human cultures. The contribu-tion of the article refers to the reconstitution and resignification of political science as a scientific noetic discipline and to the multiple transdisciplinary fields that such a condition makes possible.

  16. Por que rir da Filosofia Política?: Abertura

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    Lessa Renato

    1998-01-01

    Full Text Available As diferentes intervenções que compuseram este debate têm como referência comum uma reflexão sobre os lugares da Filosofia Política na tradição disciplinar que designamos como Ciência Política. Recusando a perspectiva que dissocia a Filosofia Política da dimensão empiricamente orientada da disciplina, os argumentos apresentados destacam o papel de fertilização de formas de vida cumprido pela primeira. A agenda dos pesquisadores devotados à boa faina da investigação empírica foi, e segue sendo, em grande medida definida e configurada por exercícios prévios de invenção social e política e por decisões de ordem ontológica, epistemológica e retórica. Neste sentido, a distinção entre ciência e filosofia é, além de obscurantista e marcada por enorme otimismo epistemológico, sintoma de um desconhecimento forte com relação à história do conhecimento político.

  17. Polímeros como modificadores asfálticos

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    Letícia SocaI da Silva

    2009-12-01

    Full Text Available

    Neste trabalho foram preparadas diferentes misturas de ligante asfáltico modificado com polímeros. Foram utilizadas quatro amostras de polímeros, sendo duas de SBS, uma de SEBS e uma de Polietileno Modificado, as quais foram caracterizadas quanto a sua estrutura e propriedades térmicas através de técnicas de Ressonância Magnética Nuclear (RMN, Cromatografia por Permeação a Gel (GPC, Análise Termogravimétrica (TGA e Calorimetria Diferencial de Varredura (DSC. O ligante modificado foi avaliado quanto a sua viscosidade, retorno elástico, comportamento reológico e estabilidade à estocagem. Foram correlacionadas a estrutura química e as transições térmicas dos polímeros com as características do ligante modificado. Os polímeros do tipo SBS foram os melhores modificadores de asfalto, quando comparado com os demais polímeros avaliados.

  18. El Desequilibrio de lo Político en Hegel

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    Juan Ignacio Arias Krause

    2016-07-01

    Full Text Available El problema político de la sociedad civil se fundamenta en su doble forma de manifestarse: por un lado, en ella se revela el carácter externo u objetivo del Estado y, por otro, produce una escisión al interior del mismo Estado. Tal problema que aparece como contradictorio (el ser exterior e interior a la vez es presentado en el pensamiento político de Hegel, en vistas a superar las dicotomías que en la teoría política moderna aparecían como insalvables. Esta superación Hegel la realiza mediante una interiorización de aquellos elementos que anteriormente habían sido marginados de la política, como son lo natural y el dominio privado, los que emergerían en la sociedad civil. En este artículo se exponen estos elementos en vistas a mostrar cómo es en este movimiento de interiorización y exteriorización de ellos donde se posibilita el acontecer de lo político.

  19. Association of mitochondrial lysyl-tRNA synthetase with HIV-1 GagPol involves catalytic domain of the synthetase and transframe and integrase domains of Pol

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    Shalak V. F.

    2011-10-01

    Full Text Available Aim. Analyze the interaction between Lysyl-tRNA synthetase (LysRS and HIV-1 GagPol to know whether a particular N-terminal sequence of mitochondrial LysRS triggers a specific recognition with GagPol. Methods. Yeast two-hybrid analysis, immunoprecipitation. Results. We have shown that LysRS associates with the Pol domain of GagPol. Conclusions. A model of the assembly of the LysRS:tRNA3Lys:GagPol packaging complex is proposed.

  20. Salazarismo y política exterior

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    Juan Carlos JIMÉNEZ REDONDO

    2010-02-01

    Full Text Available RESUMEN: El sistema internacional jugó para la Portugal de Salazar un papel esencial al actuar como fuente privilegiada de la que extraer los recursos materiales (económicos, tecnológicos o financieros e inmateriales (factores de legitimación que garantizaron el programa de reforma política de la dictadura y que permitieron al país desempeñar un papel internacional desproporcionadamente relevante si consideramos su condición de pequeña potencia periférica europea. La novedad del salazarismo respecto a períodos anteriores consistió en la adecuación de esas necesidades de apertura al exterior con una fuerte percepción de los intereses nacionales, dentro de una estrategia pragmática que le permitió acomodarse a la acelerada evolución del sistema internacional y, sobre todo, al cambio que se produjo en el sistema internacional de acuerdo a la dinámica de la Guerra Fría y sus distintas fases. Palabras clave: Salazarismo, OTAN, EFTA, Botelho Moniz, Guerra colonial, descolonización. ABSTRACT: The international system played for the Portugal of Salazar an essential role when acting like privileged source of which to extract the material resources (economic, technological or financial and immaterial (legitimation factors that guaranteed the program of political reform of the dictatorship and that allowed the country to play very out of proportion excellent a role international if we considered its condition of small European peripheral power. The newness of the salazarism with respect to previous periods consisted of the adjustment of those necessities of opening to the outside with a strong perception of the national interests, within a pragmatic strategy that allowed to comply him to the accelerated evolution of the international system and, mainly, to the change that took place in the international system according to the dynamics of the cold war and its different phases. Keywords: Salazarism, NATO, EFTA, Botelho Moniz, Colonial

  1. ¿Arte y política o política en el arte?

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    Carlos Araque Osorio

    2014-12-01

    Full Text Available Este es nuestro segundo número dedicado al tema “Arte y Política” y valdría la pena preguntarnos¿por qué dos números sobre un tema que está en boca de todo el mundo?-Académicamente se trata a diario y aparece recurrentemente en periódicos, revistas ynoticieros-. Lo cierto es, que el arte genera necesidades, conforma comunidades y sociedades,moldea conductas, da status, constituye identidad e incluso destaca virtudes y pudepropiciar que algunas verdades no tan reales en el imaginario colectivo, se trasformen eninvenciones o quimeras.También, es cierto que la influencia de los medios masivos de comunicación está presenteen el gusto que demuestran las comunidades por el arte y los artistas. Hoy en día por ejemplo:el artista, el título de la obra y la justificación o sustentación que se haga de ella, puedenser más importantes que la obra. Si a esto agregamos que es en las oficinas es donde losmass media deciden sobre que arte promocionar e impulsar y que obras desconocer oignorar, tendríamos que afirmar que en la contemporaneidad el vínculo entre arte y políticava más allá de una relación formal y se convierte en una forma de poder.

  2. Política y secularización en la Europa contemporánea

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    Manuel ÁLVAREZ TARDÍO

    2010-02-01

    Full Text Available RESUMEN: Este trabajo se ocupa de la relación entre la política y los procesos de secularización en la Europa contemporánea, estudia sus variantes y opciones ideológicas, así como sus diferentes tradiciones y situaciones nacionales, poniendo de relieve la existencia de dos grandes modelos. El primero —el de Gran Bretaaña, Bélgica y Holanda— se caracterizó por su gradualismo, tras la renuncia por parte del bloque político secular a apropiarse del Estado y su aceptación de la idea de que éste debía limitarse a proteger la libertad inherente al individuo. En cambio, el modelo de laicismo estatista —vigente en Francia, Italia y, en su versión más extrema, en la España de la II República—, partía de la idea de que el Estado era intérprete absoluto de un poder que no puede fragmentarse sin dejar de ser democrático, y se tradujo en el intento de contrarrestar la presencia católica mediante la imposición de políticas laicas, especialmente en el ámbito de la educación. Palabras Clave: Historia Contemporánea de Europa, Religión, Política, Secularización, Laicismo. ABSTRACT: This study deals with the relationship between politics and secularization processes in contemporary Europe, and studies its ideological variants and options as well as its different national traditions and situations, emphasizing the existence of two large models. The first, that of Great Britain, Belgium and Holland, is characterized by its gradualism, after the secular political block renounced appropriation of the State and accepted the idea that the State should be limited to protecting the inherent freedom of the individual. However, the model of state laicism, prevailing in France, Italy and in its most extreme versión in the Spain of the Second Republic, was based on the idea that the State was the absolute interpreter of a power that could not be fragmented without becoming undemocratic, and was expressed in the attempt to counter Catholic

  3. Estado e planejamento: o plano de metas do governo de Santa Catarina (1961 – 1970 – PLAMEG i e ii – enquanto instrumento de política desenvolvimentista State and planning: ‘PLAMEG i’ and ‘PLAMEG ii’ as instruments to improve the development in state of Santa Catarina (Brazil during the years 1961 and 1970

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    Caio Lauth Gualberto

    2013-03-01

    Full Text Available Este texto refere-se a uma pesquisa predominantemente qualitativa, fruto de um estudo exploratório-descritivo acerca das experiências de planejamento econômico realizadas pelo governo estadual em Santa Catarina, elaboradas durante o período compreendido entre 1961 e 1970, durante as gestões de Celso Ramos e Ivo Silveira e que ficaram conhecidas como Plano de Metas do Governo - PLAMEG I e II. Com o propósito de superar pontos de estrangulamentos que limitavam a expansão do setor produtivo, o governo estadual investiu nas áreas de educação, transporte, energia, sistema de crédito e agricultura e os resultados alcançados nesse decênio se refletiram na expansão no número de salas de aulas, ginásios de esporte, qualificação de professores, tempo de estudo de alunos, implantação e reformas de rodovias, expansão da oferta de energia, criação de sistema de crédito estadual, aumento da oferta agrícola, integração de produtores rurais, entre outros. Os dados coletados revelam que ao fim desse período, Santa Catarina pode contar com melhores condições infraestruturais para participar do movimento de crescimento da economia nacional. Em consequência disso, os resultados da pesquisa de maneira geral apontam que os ideais defendidos pela corrente desenvolvimentista, ou seja, aquela que entende que o Estado é o agente responsável pela garantia da criação das condições favoráveis à expansão das atividades produtivas e, consequentemente, pelo avanço em relação aos indicadores de desenvolvimento, ficam fortalecidos.  This paper describe the result of a descriptive and exploratory study that refers to an predominantly qualitative research about the experiences of economic planning carried out by the government of Santa Catarina (Brazil during the period between 1961 and 1970 and which became known as PLAMEG I and PLAMEG II.  In order to overcome the limits to the expansion of the productive sector, the government has

  4. Engajamento cívico e escolaridade superior: as eleições de 2014 e o comportamento político dos brasileiros

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    André Luiz Vieira Dias

    2015-12-01

    Full Text Available Resumo O artigo tem como objetivo analisar a influência da escolaridade sobre o comportamento político dos brasileiros. Supõe-se que a escolaridade é capaz de despertar um comportamento mais interessado, participativo e coerente, portanto, engajado, dos cidadãos. Nesse sentido, busca-se verificar (i se os cidadãos brasileiros são informados e interessados por política; (ii motivados em participar das eleições e outras atividades políticas e (iii sua avaliação e satisfação em relação ao processo democrático. Destaca-se o comportamento daqueles que possuem o ensino superior completo, em comparação aos demais níveis de escolaridade, no intuito de identificar padrões comportamentais distintos. A partir dos dados obtidos pelo ESEB 2014, além da análise descritiva dos dados, aplicou-se o modelo de regressão logística, relacionando a variável escolaridade superior a outras variáveis agrupadas em quatro categorias: (a aspectos socioeconômicos; (b informação e interesse por política; (c participação nas eleições, em atividades políticas tradicionais e em outras atividades políticas; (d avaliação e satisfação política. Dessa maneira, verifica-se (i que os brasileiros são pouco ou nada interessados por política; (ii participam das eleições mas não das atividades tradicionais e novas formas de engajamento político; (iii apoiam e estão razoavelmente satisfeitos com a democracia. Em relação aos mais escolarizados, temos o predomínio de mulheres, um público mais jovem e com renda familiar sutilmente superior à dos menos escolarizados. Aqueles que possuem o ensino superior completo tendem a se comportar de forma distinta: são levemente mais informados e interessados por política; apesar dos baixos percentuais encontrados, são os que mais participam das atividades políticas em geral; são os que mais apoiam a democracia, porém os mais insatisfeitos com o seu funcionamento. Esse estudo nos permite

  5. Asia Central en la política exterior rusa

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    Javier Morales

    2012-01-01

    Full Text Available Las políticas rusas hacia Asia Central han estado condicionadas por la herencia histórica anterior a la disolución de la URSS, pero también por los cambios en el sistema internacional y en la propia Rusia acaecidos desde entonces. ¿En qué medida la actuación de Rusia ha sido coherente y estable, basada en una estrategia para Asia Central fundamentada en los intereses nacionales? En este artículo examinamos los fundamentos de la política exterior rusa en relación con Asia Central, dividiéndola en tres apartados: político, económico y de seguridad.

  6. Ajuste macro, política monetaria y empleo

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    Jorge Iván González

    2000-04-01

    Full Text Available El artículo muestra que la política monetaria restrictiva ha sido uno de los factores que más ha incidido en el crecimiento del desempleo en Colombia durante la segunda mitad de los años noventa. La tasa de sacrificio de la política monetaria no ha sido cero, porque el costo de reducir la inflación ha sido muy elevado. La responsabilidad que tiene el manejo de la política monetaria en la crisis del sector real se hace más visible si se tiene en cuenta que no hay evidencia de que la menor demanda de trabajo esté asociada a los costos laborales y a las inflexibilidades del mercado laboral.

  7. Elecciones, Jóvenes y Política

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    Anna María Fernández Poncela

    1999-01-01

    Full Text Available Este texto muestra el papel de la juventud en un posible cambio político, especialmente en el espacio elec toral. Se centra, en concreto, en la postura político - elec toral de los jóvenes en nuestros días y de cara al fu turo cercano; por una parte, comparada con otros grupos de edad; por otra, específicamente en tre los universitarios, y finalmente intentando vislumbrar los escenarios del porvenir al respecto. Para ello se emplearán datos de una encuesta nacional, encuestas universitarias y sondeos de opinión en torno a la convocatoria de 1997, sobre todo en los resultados de las preguntas sobre la simpatía política y preferencias electorales, a quiénes se votó y a quiénes se votará.

  8. Naturaleza humana y política en Denis Diderot

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    Pablo Scotto Benito

    2015-02-01

    Full Text Available El presente trabajo se propone relacionar la concepción que Diderot tiene del ser humano con sus ideas políticas. A pesar de que no se pueda hallar en la obra del “filósofo” un tratado sistemático en el que el estudio de la naturaleza humana sirva como fundamentación de un determinado sistema político, la epistemología empirista y el monismo materialista diderotianos, con la consecuente revalorización de las pasiones corporales, conducen a una moral y una política universalistas, acordes con la naturaleza humana y centradas en la felicidad de los individuos.

  9. La política como espectáculo

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    Juan E. Fernández

    2015-01-01

    Full Text Available La política siempre estuvo ligada al espectáculo, la pompa y el teatro. La antigua oratoria imperial, eclesiástica y solemne; los debates cargados de ironías en asambleas y parlamentos; y los actuales espectáculos políticos televisados difieren más en la forma y el alcance (curiosamente más democrático que en su ausencia comunicacional. El autor piensa, que hay mucho de siniestro y peligroso en la trivialización del camino al poder cuando lo que está en juego parece ser la vida misma.

  10. La ciencia de la política.

    OpenAIRE

    Bolívar Meza, Rosendo

    2007-01-01

    Presentación. Ramos Jiménez, Alfredo Los círculos bolivarianos. El mito de la unidad del pueblo. Arenas, Nelly y Gómez Calcaño, Luis Lo massmediático y las sociedades contemporáneas. Un acercamiento a la relación medios-democracia. Briceño Romero, Ysabel La economía ambiental y la política ambiental. Caraballo, Leonardo Javier Veinte años de democracia en la Argentina. ¿Qué democracia? Kers, Mercedes y Leiras, Santiago C. La ciencia de la política. Bolívar ...

  11. La agricultura peruana: problemas, potencialidades y políticas

    OpenAIRE

    Adolfo Figueroa

    1986-01-01

    El presente trabajo tiene por objeto presentar, primero, los problemas estructurales de la agricultura peruana, luego sus potencialidades y, finalmente, los elementos para el diseño de políticas económicas. Debo admitir que este objetivo es muy ambicioso para ser desarrollado en un artículo y por un investigador individual. Por ello espero que el artículo logre, más bien, ordenar los elementos básicos para la discusión de la política económica dirigida al desarrollo agrícola del Perú....

  12. Intelectuais, cultura política e ditadura no Brasil

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    Michel Goulart da Silva

    2013-05-01

    Full Text Available Discute-se neste artigo a produção de uma cultura política compartilhada por intelectuais no contexto da ditadura civil-militar, que governou o Brasil entre os anos de 1964 e 1985. Apresenta-se numa primeira parte a relação estabelecida pelos intelectuais com o regime autoritário, principalmente a partir das reflexões realizadas pelo sociólogo Florestan Fernandes durante a ditadura. Numa segunda parte trabalha-se a noção de cultura política conservadora, compartilhada por uma parcela dos intelectuais brasileiros.

  13. O desafio político do desenvolvimento sustentado

    OpenAIRE

    Guimarães,Roberto P.

    1995-01-01

    A unanimidade que hoje parece haver em favor do desenvolvimento sustentado contrasta com a ausência de iniciativas políticas significativas para transformar as instituições econômicas, sociais e políticas que estão comprometidas com o estilo vigente de desenvolvimento. Em particular, há uma patente contradição entre o discurso antiestatista hegemônico e as exigências do desenvolvimento sustentado, que incluem um Estado ainda mais forte, em suas capacidades reguladoras e de planificação, que o...

  14. Responsabilidad social corporativa y conexiones políticas

    OpenAIRE

    Ceballos Gallego, Nicolás Bernardo

    2017-01-01

    La inclusión de políticas de Responsabilidad Social en la actividad productiva es una estrategia que en la actualidad se ve asociada al buen desempeño empresarial. Paralelo a esto, se lleva a cabo un ejercicio de respaldo a causas políticas que define el comportamiento de las compañías en términos de gobierno corporativo. Se encuentra una relación positiva y significativa entre ambos conceptos sugiriendo una relación complementaria entre ambos y asociada a causas filantrópicas más allá de lo...

  15. Pensamento liberal e hegemonia norte-americana: a cultura política em Almond e Verba DOI10.5216/o.v14i1.27658

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    José Henrique Singolano Néspoli

    2014-12-01

    Full Text Available Este artigo consiste num estudo da história do pensamento político contemporâneo e dedica-se particularmente à análise do conceito de cultura política desenvolvido por Gabriel Almond e Sidney Verba na obra A cultura cívica, publicada em 1963. A partir dessa referência, o conceito se espalhou por diversas áreas do conhecimento e a cultura política se transformou num dos mais importantes conceitos do período pós II Guerra Mundial. Esse estudo tem por objetivo analisar as concepções teóricas e práticas presentes no conceito de cultura política em seu contexto de origem, de modo que, por um lado, procura-se identificar as principais referências intelectuais e debates teóricos que contribuíram para delimitar o conceito, por outro lado, pretende analisar os desdobramentos práticos do conceito, buscando compreender as orientações do conceito para a política do pós-guerra. Em ambos os aspectos, o conceito de cultura política de Almond e Verba representou um instrumento da hegemonia norte-americana no contexto da Guerra Fria. hegemonia Estados Unidos.

  16. Proviral HIV-genome-wide and pol-gene specific Zinc Finger Nucleases: Usability for targeted HIV gene therapy

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    Wayengera Misaki

    2011-07-01

    Full Text Available Abstract Background Infection with HIV, which culminates in the establishment of a latent proviral reservoir, presents formidable challenges for ultimate cure. Building on the hypothesis that ex-vivo or even in-vivo abolition or disruption of HIV-gene/genome-action by target mutagenesis or excision can irreversibly abrogate HIV's innate fitness to replicate and survive, we previously identified the isoschizomeric bacteria restriction enzymes (REases AcsI and ApoI as potent cleavers of the HIV-pol gene (11 and 9 times in HIV-1 and 2, respectively. However, both enzymes, along with others found to cleave across the entire HIV-1 genome, slice (SX at palindromic sequences that are prevalent within the human genome and thereby pose the risk of host genome toxicity. A long-term goal in the field of R-M enzymatic therapeutics has thus been to generate synthetic restriction endonucleases with longer recognition sites limited in specificity to HIV. We aimed (i to assemble and construct zinc finger arrays and nucleases (ZFN with either proviral-HIV-pol gene or proviral-HIV-1 whole-genome specificity respectively, and (ii to advance a model for pre-clinically testing lentiviral vectors (LV that deliver and transduce either ZFN genotype. Methods and Results First, we computationally generated the consensus sequences of (a 114 dsDNA-binding zinc finger (Zif arrays (ZFAs or ZifHIV-pol and (b two zinc-finger nucleases (ZFNs which, unlike the AcsI and ApoI homeodomains, possess specificity to >18 base-pair sequences uniquely present within the HIV-pol gene (ZifHIV-polFN. Another 15 ZFNs targeting >18 bp sequences within the complete HIV-1 proviral genome were constructed (ZifHIV-1FN. Second, a model for constructing lentiviral vectors (LVs that deliver and transduce a diploid copy of either ZifHIV-polFN or ZifHIV-1FN chimeric genes (termed LV- 2xZifHIV-polFN and LV- 2xZifHIV-1FN, respectively is proposed. Third, two preclinical models for controlled testing of

  17. La justicia como problema político. Del constructivismo moral kantiano al constructivismo político rawlsiano

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    Jefferson Jaramillo Marín

    2009-01-01

    Full Text Available El artículo expone la justicia como un problema político desde la perspectiva del filósofo John Rawls. En su desarrollo se señalan las implicaciones del constructivismo kantiano en el constructivismo político rawlsiano. Se discute cómo la conexión entre estos dos tipos de constructivismo, proporciona un procedimiento de construcción, en el que agentes racionalmente autónomos, sujetos a condiciones razonables, elaboran acuerdos sobre principios públicos de justicia para lograr un sistema justo de cooperación que trascienda generacionalmente. Se concluye, mostrando las limitaciones y alcances de esta propuesta en el pensamiento filosófico y político contemporáneo.

  18. Cervantes y la Corte: Lecturas biográficas, patrocinio e interpretaciones políticas

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    Mario CRESPO LÓPEZ

    2009-12-01

    Full Text Available RESUMEN: La vida y la obra de Miguel de Cervantes contienen datos de indudable interés para el estudio de la política de la Edad Moderna y de las conexiones áulicas entre el creador literato y los grupos de poder de su época. Lo que conocemos de la biografía de Cervantes, sus inquietudes vitales, los argumentos de sus obras y los misterios que rodearon su mecenazgo y participación en la «república de las letras» se relacionan no sólo con el contexto político de desencanto tras la grandeza imperial de Felipe II sino también con la relación con personajes concretos de la Corte de Felipe III y con algunos acontecimientos, como la expulsión de los moriscos, que marcaron tanto el reinado como la propia obra cervantina. Lo cierto es que no existen demasiadas fuentes a partir de las cuales puedan estudiarse estas conexiones, pero es indudable que el creador está unido a una época en la que debe sobrevivir y a la que debe gran parte de sus preocupaciones literarias. En este trabajo se esbozan algunas conexiones políticas de Cervantes, recuperando parte de la bibliografía de los llamados «cervantistas» decimonónicos.ABSTRACT: Miguel de Cervantes' life and work contain interesting data to study the Modern Age politics and courts connections between the writer and the power ful groups at that time. Cervantes biography, his vital inquietudes, the plot in his works, the misteries of his literary sustenance and his participation in the «república de las letras» can be relationed not only with the political context of disenchantment after Philip II imperial grandeeship but also with the relation with concrete persons in the Court of Philip III and with some events, like Morisco's expulsion, that determine the reign and own Cervantes' work. There are not enough data to study those connections, but it is indubitable that the writer lives in a time where he must survive and where he shows his literary worries. This work sketches some

  19. Lengua e identidad nacional en el pensamiento político de Alonso de Cartagena

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    Luis Fernández Gallardo

    2012-06-01

    Full Text Available Alonso de Cartagena (1385-1456, uno de los intelectuales más notables en la Castilla del siglo xv, muestra en su obra literaria un profundo interés por las cuestiones lingüísticas. Su concepción del lenguaje basada en la Política de Aristóteles, integra ética y política. La lengua es el vínculo de la comunidad, por ser la sustancia de la ley, y, por tanto, es el fundamento del poder político. Al justificar la iniciativa del rey Juan II para traducir a Séneca, Cartagena considera la lengua como patrimonio real. Ofrece un interesante testimonio de la conciencia de la diversidad idiomática hispana. Distingue en el reino de Castilla tres lenguas que corresponden a tres pueblos: castellano, gallego y vasco. Ofrece un temprano testimonio de la denominación del castellano como lengua española o español.Alfonso de Cartagena, l'un des plus remarquables intellectuels castillans du XVe siècle, montre dans son œuvre un vif intérêt pour le langage. Sa conception du langage, fondée sur la Politique d'Aristote, intègre l'éthique et la politique. La langue est le lien de la communauté et la substance de la loi ; elle est donc le fondement du pouvoir politique. Pour justifier l'initiative du roi Juan II de traduire Sénèque, Cartagena considère la langue comme patrimoine royal. Il offre aussi un intéressant témoignage de la conscience de la diversité linguistique hispanique. Il distingue dans le royaume de Castille trois langues qui correspondent à trois peuples : le castillan, le galicien et le basque. Il offre un témoignage précoce de la dénomination de la langue castillane comme “langue espagnole”.

  20. Roles of Saccharomyces cerevisiae DNA polymerases Polη and Polζ in response to irradiation by simulated sunlight

    Science.gov (United States)

    Kozmin, Stanislav G.; Pavlov, Youri I.; Kunkel, Thomas A.; Sage, Evelyne

    2003-01-01

    Sunlight causes lesions in DNA that if unrepaired and inaccurately replicated by DNA polymerases yield mutations that result in skin cancer in humans. Two enzymes involved in translesion synthesis (TLS) of UV-induced photolesions are DNA polymerase η (Polη) and polymerase ζ (Polζ), encoded by the RAD30A and REV3 genes, respectively. Previous studies have investigated the TLS roles of these polymerases in human and yeast cells irradiated with monochromatic, short wavelength UVC radiation (254 nm). However, less is known about cellular responses to solar radiation, which is of higher and mixed wavelengths (310–1100 nm) and produces a different spectrum of DNA lesions, including Dewar photoproducts and oxidative lesions. Here we report on the comparative cytotoxic and mutagenic effects of simulated sunlight (SSL) and UVC radiation on yeast wild-type, rad30Δ, rev3Δ and rev3Δ rad30Δ strains. The results with SSL support several previous interpretations on the roles of these two polymerases in TLS of photodimers and (6–4) photoproducts derived from studies with UVC. They further suggest that Polη participates in the non-mutagenic bypass of SSL-dependent cytosine-containing Dewar photoproducts and 8-oxoguanine, while Polζ is mainly responsible for the mutagenic bypass of all types of Dewar photoproducts. They also suggest that in the absence of Polζ, Polη contributes to UVC- and SSL-induced mutagenesis, possibly by the bypass of photodimers containing deaminated cytosine. PMID:12888515

  1. As assimetrias entre as políticas setoriais e a política de planejamento regional no Brasil

    Directory of Open Access Journals (Sweden)

    João Mendes da Rocha Neto

    2011-12-01

    Full Text Available O modo de conduzir a formulação das políticas de desenvolvimento regional tem se constituído em ampla arena de embates acadêmicos e técnicos e levado a reflexões sobre os rumos das múltiplas políticas que acompanham esse processo de planejamento regional. Isso, em parte, decorre do processo de globalização e das políticas neoliberais que o acompanham, as quais possuem um forte apelo à competitividade. Essa estratégia de buscar espaços "privilegiados" se fez presente de uma forma intensa em alguns setores produtivos, que, ao usar o espaço como mercadoria, utilizam seu conjunto de atributos (naturais e artificiais para realizarem-se e reproduzirem-se como parte do sistema. Assim, a proposta de estudo pretende responder a questão: em que medida as políticas públicas setoriais têm dialogado com as políticas de planejamento e desenvolvimento regional no âmbito do governo federal? No caso das políticas de planejamento regional, o recorte espacial é visto como um instrumento que, ao ser aplicado, pode se mostrar capaz de viabilizar a integração de ações multissetorializadas, o que em certa dimensão apontaria para uma maior eficiência do Estado na busca por restabelecer o equilíbrio esgarçado, tornando mais eficiente o planejamento.

  2. File list: Pol.CDV.05.AllAg.Cardiomyocytes [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  3. File list: Pol.CDV.20.AllAg.Cardiomyocytes [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  4. File list: Pol.CDV.10.AllAg.Cardiomyocytes [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  5. File list: Pol.CDV.50.AllAg.Cardiomyocytes [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  6. File list: Pol.Emb.05.AllAg.Embryonic_palates [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Emb.05.AllAg.Embryonic_palates mm9 RNA polymerase Embryo Embryonic palates http...://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Emb.05.AllAg.Embryonic_palates.bed ...

  7. File list: Pol.Emb.20.AllAg.Embryonic_palates [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  8. File list: Pol.Kid.20.AllAg.Nephrectomy_sample [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Kid.20.AllAg.Nephrectomy_sample hg19 RNA polymerase Kidney Nephrectomy sample h...ttp://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Kid.20.AllAg.Nephrectomy_sample.bed ...

  9. File list: Pol.Kid.10.AllAg.Nephrectomy_sample [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  10. File list: Pol.Kid.05.AllAg.Nephrectomy_sample [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  11. File list: Pol.Bld.20.AllAg.Polymorphonuclear_leukocytes [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Bld.20.AllAg.Polymorphonuclear_leukocytes hg19 RNA polymerase Blood Polymorphonuclear... leukocytes http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Bld.20.AllAg.Polymorphonuclear_leukocytes.bed ...

  12. File list: Pol.Bld.50.AllAg.Polymorphonuclear_leukocytes [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  13. File list: Pol.Bld.05.AllAg.Polymorphonuclear_leukocytes [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Bld.05.AllAg.Polymorphonuclear_leukocytes hg19 RNA polymerase Blood Polymorphonuclear... leukocytes http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Bld.05.AllAg.Polymorphonuclear_leukocytes.bed ...

  14. File list: Pol.Lng.10.AllAg.Lung_adenocarcinoma [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Lng.10.AllAg.Lung_adenocarcinoma mm9 RNA polymerase Lung Lung adenocarcinoma ht...tp://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Lng.10.AllAg.Lung_adenocarcinoma.bed ...

  15. File list: Pol.Emb.20.AllAg.Embryonic_pancreas [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Emb.20.AllAg.Embryonic_pancreas mm9 RNA polymerase Embryo Embryonic pancreas ht...tp://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Emb.20.AllAg.Embryonic_pancreas.bed ...

  16. File list: Pol.Emb.10.AllAg.Embryonic_pancreas [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  17. File list: Pol.Emb.05.AllAg.Embryonic_pancreas [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  18. File list: Pol.Adl.05.AllAg.Octopaminergic_neurons [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Adl.05.AllAg.Octopaminergic_neurons dm3 RNA polymerase Adult Octopaminergic neurons... http://dbarchive.biosciencedbc.jp/kyushu-u/dm3/assembled/Pol.Adl.05.AllAg.Octopaminergic_neurons.bed ...

  19. File list: Pol.Adl.20.AllAg.Octopaminergic_neurons [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Adl.20.AllAg.Octopaminergic_neurons dm3 RNA polymerase Adult Octopaminergic neurons... http://dbarchive.biosciencedbc.jp/kyushu-u/dm3/assembled/Pol.Adl.20.AllAg.Octopaminergic_neurons.bed ...

  20. File list: Pol.Adl.50.AllAg.Octopaminergic_neurons [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Adl.50.AllAg.Octopaminergic_neurons dm3 RNA polymerase Adult Octopaminergic neurons... http://dbarchive.biosciencedbc.jp/kyushu-u/dm3/assembled/Pol.Adl.50.AllAg.Octopaminergic_neurons.bed ...

  1. File list: Pol.Adl.10.AllAg.Octopaminergic_neurons [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Adl.10.AllAg.Octopaminergic_neurons dm3 RNA polymerase Adult Octopaminergic neurons... http://dbarchive.biosciencedbc.jp/kyushu-u/dm3/assembled/Pol.Adl.10.AllAg.Octopaminergic_neurons.bed ...

  2. File list: Pol.CDV.10.AllAg.Atrioventicular_canals [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.CDV.10.AllAg.Atrioventicular_canals mm9 RNA polymerase Cardiovascular Atrioventicular canals... http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.CDV.10.AllAg.Atrioventicular_canals.bed ...

  3. File list: Pol.CDV.05.AllAg.Atrioventicular_canals [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  4. File list: Pol.CDV.50.AllAg.Atrioventicular_canals [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  5. File list: Pol.CDV.20.AllAg.Atrioventicular_canals [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.CDV.20.AllAg.Atrioventicular_canals mm9 RNA polymerase Cardiovascular Atrioventicular canals... http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.CDV.20.AllAg.Atrioventicular_canals.bed ...

  6. La justicia como problema político. Del constructivismo moral kantiano al constructivismo político rawlsiano

    OpenAIRE

    Jefferson Jaramillo Marín; Yesid Echeverry Enciso

    2009-01-01

    El artículo expone la justicia como un problema político desde la perspectiva del filósofo John Rawls. En su desarrollo se señalan las implicaciones del constructivismo kantiano en el constructivismo político rawlsiano. Se discute cómo la conexión entre estos dos tipos de constructivismo, proporciona un procedimiento de construcción, en el que agentes racionalmente autónomos, sujetos a condiciones razonables, elaboran acuerdos sobre principios públicos de justicia para lograr un sistema justo...

  7. La escisión entre Ciencia Política y realidad política: el caso de la Seguridad Democrática

    Directory of Open Access Journals (Sweden)

    Carlos Andrés Ramírez González

    2014-12-01

    Full Text Available La política de seguridad democrática, adoptada por el Presidente Álvaro Uribe Vélez durante su periodo de gobierno, resultó en un viraje fundamental en los rumbos del país luego del fallido proceso de paz del gobierno Pastrana. En este sentido, el presente trabajo busca demostrar que la Ciencia Política abordó el fenómeno político en contravía con el curso de los hechos, de tal manera que mientras la política de Seguridad Democrática propugnaba por un aumento en la ofensiva militar, la visión desde la Ciencia Política se concentraba en la manera de llegar a unos diálogos de paz o una salida concertada al conflicto. Esto, por tanto, se puede traducir en un rechazo al punto de vista preponderante y a una postura alternativa en el estudio de la realidad política nacional. Para demostrar lo anterior, se realiza una revisión documental aplicada a artículos académicos en cuatro revistas de Ciencia Política del país: Análisis Político, Colombia Internacional, Papel Político y Estudios Políticos durante el periodo de publicación de 2002 a 2012.

  8. A política do ensaio político de catálogo

    Directory of Open Access Journals (Sweden)

    Julian Stallabrass

    2010-01-01

    Full Text Available Este texto foi originalmente publicado no livro Villa Lituania, que aborda o trabalho homônimo, apresentado pela dupla de artistas lituanos Nomeda & Gediminas Urbonas na 52ª Bienal de Veneza, em 2007. O título designa o edifício que até 1940 sediou, em Roma, a primeira embaixada da república independente da Lituania, mantido sob jurisdição das autoridades russas mesmo após a queda do bloco soviético, em 1989, e considerado, pela ex-república soviética, território nacional ocupado. O trabalho implicou na construção de um pombal na Villa Lituania e numa série de ações de conotação política e social em Veneza, Roma e Vilna, cidade onde a dupla reside. Os artistas são conhecidos internacionalmente pela dimensão política e social que pretendem infundir a suas ações. Não obstante a forte carga ideológica que envolveu a intervenção de Nomeda & Gediminas Urbonas na Bienal de Veneza, neste ensaio o autor, tributário da tradição marxista, demonstra notável ceticismo em relação à potência crítica do discurso marxista evocado em parte significativa da arte contemporânea.This text has been originally published in the book Villa Lituania, which approaches the homonymous work presented by the lithuanian artists Nomeda & Gediminas Urbonas, at the 52ª Venice Biennial, in 2007. The title is the name of the building used until 1940 as the seat for the first independent Lithuania Republic's embassy, in Rome, nevertheless kept under the jurisdiction of Russian authorities since the fall of the soviet bloc, in 1989, and considered, by the ex-soviet Republic, national territory under foreign occupation. The work involved the creation of a pigeon loft at Villa Lituania building, as well as a series of actions targeted at social and politic issues in Venice, Rome and Vilnius, where the tandem lives. Socially and politically addressed actions have made the artists internationally known. Notwithstanding the strong ideological drive

  9. Architecture of the RNA polymerase II-TFIIF complex revealed by cross-linking and mass spectrometry

    DEFF Research Database (Denmark)

    Chen, Zhuo Angel; Jawhari, Anass; Fischer, Lutz

    2010-01-01

    Higher-order multi-protein complexes such as RNA polymerase II (Pol II) complexes with transcription initiation factors are often not amenable to X-ray structure determination. Here, we show that protein cross-linking coupled to mass spectrometry (MS) has now sufficiently advanced as a tool to ex...

  10. I Pol Makkartni v podarok / Aleksei Shipulin ; interv. Jelena Skulskaja

    Index Scriptorium Estoniae

    Shipulin, Aleksei

    2004-01-01

    Moskvas elav Eesti kodanikust dokumentalist teeb Eestis vene telekanalile "Kultura" dokumentaalfilmi Lennart Merist. Režissöör jutustab ka oma varasematest filmidest nagu "Paul McCartney. 72 tundi Venemaal" ("Pol Makkartni. 72 tshassa v Rossii") ja "Serõi voronok. Komu tõ nuzhen?"

  11. Fast Superpixel Segmentation Algorithm for PolSAR Images

    Directory of Open Access Journals (Sweden)

    Zhang Yue

    2017-10-01

    Full Text Available As a pre-processing technique, superpixel segmentation algorithms should be of high computational efficiency, accurate boundary adherence and regular shape in homogeneous regions. A fast superpixel segmentation algorithm based on Iterative Edge Refinement (IER has shown to be applicable on optical images. However, it is difficult to obtain the ideal results when IER is applied directly to PolSAR images due to the speckle noise and small or slim regions in PolSAR images. To address these problems, in this study, the unstable pixel set is initialized as all the pixels in the PolSAR image instead of the initial grid edge pixels. In the local relabeling of the unstable pixels, the fast revised Wishart distance is utilized instead of the Euclidean distance in CIELAB color space. Then, a post-processing procedure based on dissimilarity measure is empolyed to remove isolated small superpixels as well as to retain the strong point targets. Finally, extensive experiments based on a simulated image and a real-world PolSAR image from Airborne Synthetic Aperture Radar (AirSAR are conducted, showing that the proposed algorithm, compared with three state-of-the-art methods, performs better in terms of several commonly used evaluation criteria with high computational efficiency, accurate boundary adherence, and homogeneous regularity.

  12. Políticas en la organización

    Directory of Open Access Journals (Sweden)

    Alvaro Rubio Salas

    1989-04-01

    Full Text Available RESUMEN Toda organización por así decirlo obtiene una serie de políticas que la destacan y la diferencian de las demás, sin embargo se pueden definir en  planes de acción que reflejan e identifican la personalidad y estilo de vida de esta.

  13. CRISPR Technology Reveals RAD(51)-ical Mechanisms of Repair in Roundworms: An Educational Primer for Use with "Promotion of Homologous Recombination by SWS-1 in Complex with RAD-51 Paralogs in Caenorhabditis elegans".

    Science.gov (United States)

    Turcotte, Carolyn A; Andrews, Nicolas P; Sloat, Solomon A; Checchi, Paula M

    2016-11-01

    The mechanisms cells use to maintain genetic fidelity via DNA repair and the accuracy of these processes have garnered interest from scientists engaged in basic research to clinicians seeking improved treatment for cancer patients. Despite the continued advances, many details of DNA repair are still incompletely understood. In addition, the inherent complexity of DNA repair processes, even at the most fundamental level, makes it a challenging topic. This primer is meant to assist both educators and students in using a recent paper, "Promotion of homologous recombination by SWS-1 in complex with RAD-51 paralogs in Caenorhabditis elegans," to understand mechanisms of DNA repair. The goals of this primer are to highlight and clarify several key techniques utilized, with special emphasis on the clustered, regularly interspaced, short palindromic repeats technique and the ways in which it has revolutionized genetics research, as well as to provide questions for deeper in-class discussion. Copyright © 2016 by the Genetics Society of America.

  14. La Defensa, Política de Estado

    Directory of Open Access Journals (Sweden)

    Muñoz-Alonso, Alejandro

    2008-12-01

    Full Text Available The areas of the State Policy are set, specially focussing on the Defense as it is closely related to concepts like National Interest and Anglo-Saxon bipartisan policy. Nevertheless, the political alternation will cause differences. It is also necessary to tell the difference between the State Policy and the Policy carried out by the State. That’s why the democratic Parliaments play a fundamental role in shaping the defence policy. Although the Parliament symbolizes the National Sovereignty there can be and there are actually differences with the Public Opinion. This sort of divorce is not really new as, in Spain, it became evident in a very intensive way on the occasion of decisions such as the Spanish entry into the NATO. A State Policy related to Defense, kept during a long time and resistant to political alternation would certainly be the best instrument to reach a culture of defense.Se establecen los ámbitos de las políticas de estado, con especial énfasis en la Defensa al estar esta vinculada al concepto de interés nacional, y al anglosajón bipartisan policy. No obstante, la alternancia política va a crear discrepancias. Conviene diferenciar la “Política de Estado” y la “Política del Estado”. Por ello, los Parlamentos democráticos juegan un papel fundamental en la conformación de la política de defensa. Pese a que el Parlamento representa a la soberanía nacional pueden producirse, y de hecho se producen, discrepancias con la opinión pública. Este divorcio no es nuevo y en España se ha manifestado de forma muy intensa con ocasión de tomas de decisión como la incorporación a la OTAN. Una política de Estado en defensa, mantenida en el tiempo y resistente a las alternancias políticas sería el instrumento más adecuado para lograr una cultura de defensa.

  15. Políticas públicas: bienestar, reconocimiento, simulacro

    Directory of Open Access Journals (Sweden)

    Rafael Bayce

    2008-01-01

    Full Text Available Las políticas públicas son hijas del crecimiento de los Estados posrrenacentistas y de las necesidades de planificación administrativa de sociedades de masas. Las políticas conservadoras afirman la subsidiariedad del Estado, se centran en la familia y en el temor a la democracia y a los sindicatos. Las liberales se anclan en la corrección de fallas del mercado y de contingencias biológicas. Las socialdemócratas, más ambiciosas, aspiran a una previsión de todas las contingencias y desigualdades ilegítimas, desde un Estado orientador del mercado y no subsidiario. Los Estados de Bienestar surgen del intento de superar recesiones, desempleo y malestar social desde la inversión, hasta deficitaria, de Estados que esperan luego recuperar su inversión. Las nociones de soberanía y de derechos humanos dificultan ese retorno y nutren un crecimiento progresivo de los imaginarios de consumo que erosionan un sistema inicialmente exitoso, desde que no son más inversiones e intervenciones de emergencia sino parte del cálculo de bienestares colectivos e individuales. Son víctimas de su éxito. Pese a que los neoliberales subrayan las insuficiencias teóricas y los fallos históricos de las políticas públicas clásicas, llegados al poder todos las aplican porque la cultura política los supone y enfrentarla sería electoralmente suicida. Hasta los marxistas lo hacen. Sin embargo, la sociedad de consumo y la cultura posmoderna van creando un progresivo hiato entre la moderna oferta tecnoburocrática iluminista de satisfactores, y la más reciente demanda, socialmente mucho más exigente y variada. Deberían disfrutar, por ende, de utilidad marginal político-electoral decreciente. Pero en la medida en que son apreciadas, no por su sustancia material, sino por el ‘reconocimiento’ simbólico que implican, y porque las poblaciones-objetivo han internalizado como legítimas las ofertas iluministas, paterno-maternales, las políticas públicas todav

  16. Fronteras morales y políticas sexuales: apuntes sobre 'la política LGBT' y el deseo del Estado

    OpenAIRE

    Hernández, Franklin Gil

    2013-01-01

    A partir de un seguimiento de políticas (gubernamentales, de los movimientos sociales y de la vida cotidiana) en la ciudad de Bogotá (Colombia), relacionadas con la ampliación de ciudadanías sexuales, este artículo trata sobre los territorios morales que dichas políticas crean, y sobre los cuerpos que desea el Estado o que reclaman ser deseados por él. Particularmente se analizan la 'política LGBT' y la 'política gay' en un contexto local y su paradójica contribución a la normalización de la ...

  17. Ups and Downs of Poised RNA Polymerase II in B-Cells.

    Directory of Open Access Journals (Sweden)

    Phuong Dao

    2016-04-01

    Full Text Available Recent genome-wide analyses have uncovered a high accumulation of RNA polymerase II (Pol II at the 5' end of genes. This elevated Pol II presence at promoters, referred to here as Poll II poising, is mainly (but not exclusively attributed to temporal pausing of transcription during early elongation which, in turn, has been proposed to be a regulatory step for processes that need to be activated "on demand". Yet, the full genome-wide regulatory role of Pol II poising is yet to be delineated. To elucidate the role of Pol II poising in B cell activation, we compared Pol II profiles in resting and activated B cells. We found that while Pol II poised genes generally overlap functionally among different B cell states and correspond to the functional groups previously identified for other cell types, non-poised genes are B cell state specific. Focusing on the changes in transcription activity upon B cell activation, we found that the majority of such changes were from poised to non-poised state. The genes showing this type of transition were functionally enriched in translation, RNA processing and mRNA metabolic process. Interestingly, we also observed a transition from non-poised to poised state. Within this set of genes we identified several Immediate Early Genes (IEG, which were highly expressed in resting B cell and shifted from non-poised to poised state after B cell activation. Thus Pol II poising does not only mark genes for rapid expression in the future, but it is also associated with genes that are silenced after a burst of their expression. Finally, we performed comparative analysis of the presence of G4 motifs in the context of poised versus non-poised but active genes. Interestingly we observed a differential enrichment of these motifs upstream versus downstream of TSS depending on poising status. The enrichment of G4 sequence motifs upstream of TSS of non-poised active genes suggests a potential role of quadruplexes in expression

  18. Maternal MEMI Promotes Female Meiosis II in Response to Fertilization in Caenorhabditis elegans.

    Science.gov (United States)

    Ataeian, Maryam; Tegha-Dunghu, Justus; Curtis, Donna G; Sykes, Ellen M E; Nozohourmehrabad, Ashkan; Bajaj, Megha; Cheung, Karen; Srayko, Martin

    2016-12-01

    In most animals, female meiosis completes only after fertilization. Sperm entry has been implicated in providing a signal for the initiation of the final meiotic processes; however, a maternal component required for this process has not been previously identified. We report the characterization of a novel family of three highly similar paralogs (memi-1, memi-2, memi-3) that encode oocyte-specific proteins. A hyper-morphic mutation memi-1(sb41) results in failure to exit female meiosis II properly; however, loss of all three paralogs results in a "skipped meiosis II" phenotype. Mutations that prevent fertilization, such as fer-1(hc1), also cause a skipped meiosis II phenotype, suggesting that the MEMI proteins represent a maternal component of a postfertilization signal that specifies the meiosis II program. MEMI proteins are degraded before mitosis and sensitive to ZYG-11, a substrate-specific adapter for cullin-based ubiquitin ligase activity, and the memi-1(sb41) mutation results in inappropriate persistence of the MEMI-1 protein into mitosis. Using an RNAi screen for suppressors of memi-1(sb41), we identified a sperm-specific PP1 phosphatase, GSP-3/4, as a putative sperm component of the MEMI pathway. We also found that MEMI and GSP-3/4 proteins can physically interact via co-immunoprecipitation. These results suggest that sperm-specific PP1 and maternal MEMI proteins act in the same pathway after fertilization to facilitate proper meiosis II and the transition into embryonic mitosis. Copyright © 2016 by the Genetics Society of America.

  19. DNA polymerase iota (Pol ι) promotes invasion and metastasis of esophageal squamous cell carcinoma.

    Science.gov (United States)

    Zou, Shitao; Shang, Zeng-Fu; Liu, Biao; Zhang, Shuyu; Wu, Jinchang; Huang, Min; Ding, Wei-Qun; Zhou, Jundong

    2016-05-31

    DNA polymerase iota (Pol ι) is an error-prone DNA polymerase involved in translesion DNA synthesis (TLS) that contributes to the accumulation of DNA mutations. We recently showed that Pol ι is overexpressed in human esophageal squamous cell cancer (ESCC) tissues which promotes ESCC' progression. The present study was aimed at investigating the molecular mechanisms by which Pol ι enhances the invasiveness and metastasis of ESCC cells. We found that the expression of Pol ι is significantly higher in ESCCs with lymph node metastasis compared to those without lymph node metastasis. Kaplan-Meier analysis revealed an inverse correlation between Pol ι expression and patient prognosis. The expression levels of matrix metalloproteinase-2 (MMP-2) and matrix metalloproteinase-9 (MMP-9), two essential regulators of cells' invasiveness, were positively associated with Pol ι expression in ESCC tissues. Ectopic expression of Pol ι enhanced the motility and invasiveness of ESCC cells as evaluated by wound-healing and transwell assays, respectively. A xenograft nude mouse model showed that Pol ι promotes the colonization of ESCC cells in the liver, lung and kidney. Signaling pathway analysis identified the JNK-AP-1 cascade as a mediator of the Pol ι-induced increase in the expression of MMP-2/9 and enhancement of ESCC progression. These data demonstrate the underlying mechanism by which Pol ι promotes ESCC progression, suggesting that Pol ι is a potential novel prognostic biomarker and therapeutic target for ESCC.

  20. O contratualismo como método: política, direito e neocontratualismo

    Directory of Open Access Journals (Sweden)

    J. R. N. Chiappin

    2010-02-01

    Full Text Available O objetivo deste artigo é apresentar o contratualismo como método e como o resultado de uma sistematização de outros métodos de construção do conhecimento. Enquanto o contratualismo clássico tem como paradigmas os modelos, geométrico e mecânico, da Física de Galileu e de Descartes - em particular, o modelo de escolha racional com Descartes -, o contratualismo rawlsiano tem como paradigma alguns modelos da microeconomia - em particular, o modelo de equilíbrio geral. O método contratualista tem como projeto a transformação, no século XVII, da política e do Direito em uma disciplina científica, assumindo que, no século XVII: (i o modelo do conhecimento é o modelo geométrico e o conhecimento é conhecimento certo; (ii o modelo de indivíduo admite-o como racional e auto-interessado; (iii há uma teoria racional da ação e decisão humana. Portanto, para viabilizar o projeto de transformar a política e o Direito em ciência, o contratualismo é aqui interpretado não substantivamente, mas instrumentalmente, como método para acessar os fundamentos do mundo político. O método contratualista persegue uma combinação do modelo científico do conhecimento das causas eficientes e de suas relações aos efeitos, com o modelo de conhecimento das causas finais como estudo dos fins ou das características funcionais das coisas. Para interpretarmos o contratualismo como método, admitimos o novo modelo da relação entre conhecimento e tecnologia elaborado pela ciência moderna, que sustenta que o conhecimento da natureza é um conhecimento de conquista e domínio capaz de produzir mecanismos tecnológicos de intervenção na natureza com o objetivo de, conhecendo e manipulando as causas, obter os efeitos desejados.

  1. Repriming by PrimPol is critical for DNA replication restart downstream of lesions and chain-terminating nucleosides.

    Science.gov (United States)

    Kobayashi, Kaori; Guilliam, Thomas A; Tsuda, Masataka; Yamamoto, Junpei; Bailey, Laura J; Iwai, Shigenori; Takeda, Shunichi; Doherty, Aidan J; Hirota, Kouji

    2016-08-02

    PrimPol is a DNA damage tolerance enzyme possessing both translesion synthesis (TLS) and primase activities. To uncover its potential role in TLS-mediated IgVλ hypermutation and define its interplay with other TLS polymerases, PrimPol(-/-) and PrimPol(-/-)/Polη(-/-)/Polζ (-/-) gene knockouts were generated in avian cells. Loss of PrimPol had no significant impact on the rate of hypermutation or the mutation spectrum of IgVλ. However, PrimPol(-/-) cells were sensitive to methylmethane sulfonate, suggesting that it may bypass abasic sites at the IgVλ segment by repriming DNA synthesis downstream of these sites. PrimPol(-/-) cells were also sensitive to cisplatin and hydroxyurea, indicating that it assists in maintaining / restarting replication at a variety of lesions. To accurately measure the relative contribution of the TLS and primase activities, we examined DNA damage sensitivity in PrimPol(-/-) cells complemented with polymerase or primase-deficient PrimPol. Polymerase-defective, but not primase-deficient, PrimPol suppresses the hypersensitivity of PrimPol(-/-) cells. This indicates that its primase, rather than TLS activity, is pivotal for DNA damage tolerance. Loss of TLS polymerases, Polη and Polζ has an additive effect on the sensitivity of PrimPol(-/-) cells. Moreover, we found that PrimPol and Polη-Polζ redundantly prevented cell death and facilitated unperturbed cell cycle progression. PrimPol(-/-) cells also exhibited increased sensitivity to a wide variety of chain-terminating nucleoside analogs (CTNAs). PrimPol could perform close-coupled repriming downstream of CTNAs and oxidative damage in vitro. Together, these results indicate that PrimPol's repriming activity plays a central role in reinitiating replication downstream from CTNAs and other specific DNA lesions.

  2. Promoter2.0: for the recognition of PolII promoter sequences

    DEFF Research Database (Denmark)

    Knudsen, Steen; Knudsen, Steen

    1999-01-01

    transcription start sites. On standardized test setsconsisting of human genomic DNA, the performance of Promoter2.0 compares well with other softwaredeveloped for the same purpose. Availability : Promoter2.0 is available as a Web server at http://www.cbs.dtu.dk/services/promoter/ Contact : steen@cbs.dtu.dk...

  3. TSSPlant: a new tool for prediction of plant Pol II promoters

    KAUST Repository

    Shahmuradov, Ilham A.

    2017-01-13

    Our current knowledge of eukaryotic promoters indicates their complex architecture that is often composed of numerous functional motifs. Most of known promoters include multiple and in some cases mutually exclusive transcription start sites (TSSs). Moreover, TSS selection depends on cell/tissue, development stage and environmental conditions. Such complex promoter structures make their computational identification notoriously difficult. Here, we present TSSPlant, a novel tool that predicts both TATA and TATA-less promoters in sequences of a wide spectrum of plant genomes. The tool was developed by using large promoter collections from ppdb and PlantProm DB. It utilizes eighteen significant compositional and signal features of plant promoter sequences selected in this study, that feed the artificial neural network-based model trained by the backpropagation algorithm. TSSPlant achieves significantly higher accuracy compared to the next best promoter prediction program for both TATA promoters (MCC≃0.84 and F1-score≃0.91 versus MCC≃0.51 and F1-score≃0.71) and TATA-less promoters (MCC≃0.80, F1-score≃0.89 versus MCC≃0.29 and F1-score≃0.50). TSSPlant is available to download as a standalone program at http://www.cbrc.kaust.edu.sa/download/.

  4. TSSPlant: a new tool for prediction of plant Pol II promoters

    KAUST Repository

    Shahmuradov, Ilham A.; Umarov, Ramzan; Solovyev, Victor V.

    2017-01-01

    Our current knowledge of eukaryotic promoters indicates their complex architecture that is often composed of numerous functional motifs. Most of known promoters include multiple and in some cases mutually exclusive transcription start sites (TSSs). Moreover, TSS selection depends on cell/tissue, development stage and environmental conditions. Such complex promoter structures make their computational identification notoriously difficult. Here, we present TSSPlant, a novel tool that predicts both TATA and TATA-less promoters in sequences of a wide spectrum of plant genomes. The tool was developed by using large promoter collections from ppdb and PlantProm DB. It utilizes eighteen significant compositional and signal features of plant promoter sequences selected in this study, that feed the artificial neural network-based model trained by the backpropagation algorithm. TSSPlant achieves significantly higher accuracy compared to the next best promoter prediction program for both TATA promoters (MCC≃0.84 and F1-score≃0.91 versus MCC≃0.51 and F1-score≃0.71) and TATA-less promoters (MCC≃0.80, F1-score≃0.89 versus MCC≃0.29 and F1-score≃0.50). TSSPlant is available to download as a standalone program at http://www.cbrc.kaust.edu.sa/download/.

  5. Missing links between histones and RNA Pol II arising from SAND?

    Science.gov (United States)

    Eukaryotic SAND domain-containing proteins bind DNA and are implicated in direct target gene activation and chromatin-mediated gene regulation. We summarize our recent results demonstrating that the Arabidopsis SAND domain protein ULTRAPETALA1 (ULT1) plays a key role in counteracting target gene rep...

  6. Políticas de seguridad informática

    Directory of Open Access Journals (Sweden)

    Ciro Antonio Dussan Clavijo

    2006-01-01

    Full Text Available La globalización de la economía ha exigido que las empresas implementen plataformas tecnológicas que soporten la nueva forma de hacer negocios. El uso de Internet para este fin, conlleva a que se desarrollen proyectos de seguridad informática que garanticen la integridad, disponibilidad y accesibilidad de la información. La creación de políticas de seguridad es una labor fundamental que involucra las personas, los procesos y los recursos de la compañía. Este articulo presenta los puntos clave a tener en cuenta para diseñar una política de seguridad basándose en la norma ISO 17799.

  7. A política da guerra em Maquiavel

    OpenAIRE

    Coelho,Maria Francisca Pinheiro; Menezes,Marilde Loiola de

    2013-01-01

    Ao considerar que os objetivos do governante são a conquista e a manutenção do poder, Nicolau Maquiavel sugere ser o estado de guerra uma situação permanente na arte de governar. Este artigo aborda o pensamento político do autor, a partir de sua análise sobre a guerra. Visa apreender o sentido que ele confere à política e os fundamentos de uma teoria sobre a guerra, construída com base no diálogo com as experiências dos antigos e as circunstâncias históricas de seu tempo. O trabalho está estr...

  8. Gênero e política no pensamento de Maquiavel

    OpenAIRE

    Pitkin, Hannah

    2013-01-01

    O texto é parte de uma análise mais ampla da teórica política Hanna Pitkin sobre as relações de gênero na obra de Nicolau Maquiavel. Apresenta uma análise das representações do feminino nos textos do autor florentino. Há um inventário detalhado, no artigo, de quais são as imagens das mulheres e como elas são mobilizadas. Com ele, Pitkin discute as implicações políticas dessas imagens. A oposição entre o masculino e o feminino é apresentada como um componente importante das compreensões do pod...

  9. Contextos políticos pre-electorales

    OpenAIRE

    Iñíguez Rímoli, Nathalie; Fernández, Guillermo

    2007-01-01

    El presente artículo está enmarcado en el proyecto de investigación “El éxito de las campañas políticas locales en el contexto de campañas de carácter nacional en la Argentina: el caso de la ciudad de La Plata en las elecciones de los años 1999 y 2005”. En el mismo se busca establecer la relación correspondiente entre las campañas electorales de los años 1999 y 2005, para lograr la caracterización del contexto de construcción y legitimación de las campañas políticas locales en el marco de las...

  10. Hopf Bifurcation of Compound Stochastic van der Pol System

    Directory of Open Access Journals (Sweden)

    Shaojuan Ma

    2016-01-01

    Full Text Available Hopf bifurcation analysis for compound stochastic van der Pol system with a bound random parameter and Gaussian white noise is investigated in this paper. By the Karhunen-Loeve (K-L expansion and the orthogonal polynomial approximation, the equivalent deterministic van der Pol system can be deduced. Based on the bifurcation theory of nonlinear deterministic system, the critical value of bifurcation parameter is obtained and the influence of random strength δ and noise intensity σ on stochastic Hopf bifurcation in compound stochastic system is discussed. At last we found that increased δ can relocate the critical value of bifurcation parameter forward while increased σ makes it backward and the influence of δ is more sensitive than σ. The results are verified by numerical simulations.

  11. Rye B chromosomes encode a functional Argonaute-like protein with in vitro slicer activities similar to its A chromosome paralog

    Czech Academy of Sciences Publication Activity Database

    Ma, W.; Gabriel, T.S.; Martis, M.M.; Gursinsky, T.; Schubert, V.; Vrána, Jan; Doležel, Jaroslav; Grundlach, H.; Altschmied, L.; Scholz, U.; Himmelbach, A.; Behrens, S.E.; Banaei-Moghaddam, A.M.; Houben, A.

    2017-01-01

    Roč. 213, č. 2 (2017), s. 916-928 ISSN 0028-646X R&D Projects: GA MŠk(CZ) LO1204; GA ČR GBP501/12/G090 Institutional support: RVO:61389030 Keywords : rna-polymerase-ii * ribosomal-rna * accessory chromosomes * plant argonautes * gene-expression * evolution * transcription * pseudogenes * sequences * identification * Argonaute * B chromosomes * B-located genes * gene erosion. gene expression * pseudogenization * Secale cereale Subject RIV: EB - Genetics ; Molecular Biology OBOR OECD: Plant sciences, botany Impact factor: 7.330, year: 2016

  12. II Jornada de Cultura Jurídica

    Directory of Open Access Journals (Sweden)

    Manuel Vial Dumas

    2016-07-01

    Full Text Available

    El passat 18 de març de 2016 es va celebrar a la seu institucional de la UOC (avinguda del Tibidabo, núm. 39-43 de Barcelona la II Jornada de Cultura Jurídica, organitzada pels Estudis de Dret i Ciència Política de la UOC i la Càtedra de Cultura Jurídica de la Universitat de Girona (UdG.

  13. Governamentalidade e a genealogia da política

    Directory of Open Access Journals (Sweden)

    Colin Gordon

    2013-12-01

    Full Text Available O artigo oferece uma série de reflexões a respeito de uma fase dos trabalhos de Michel Foucault e de alguns de seus colaboradores apresentada no volume The Foucault effect: studies in governmentality (1991, coeditado pelo autor. Tais reflexões se organizam em três partes. Primeiro, há uma revisão de alguns aspectos das aulas de Foucault sobre governamentalidade que, por diferentes razões, foram deixados de lado quando o livro foi publicado. Em seguida, faz-se um balanço de temas importantes que, embora presentes no livro, não receberam suficiente atenção dos leitores. Finalmente, no eixo que ocupa a maior parte do artigo, examinam-se as últimas discussões de Foucault a respeito do que o autor denomina múltiplos nascimentos da política, a fim de demonstrar a continuidade da pertinência do empreendimento foucaultiano nos anos 1970, tornado possível devido à noção de governamentalidade, ao mesmo tempo tão estranha e operacional. Tal atualidade é indicada não somente pelo incremento dos estudos sobre governamentalidade após o aparecimento dos cursos que Foucault deu no Collège de France, mas principalmente pelos dilemas e aporias que a cultura política em que estamos mergulhados nos trouxe. Nesse sentido, o artigo se encerra com uma espécie de agenda de pesquisa para dar continuidade ao trabalho inacabado de Foucault, uma agenda que nos convida a aprofundar nossa compreensão das relações entre a filosofia crítica, a racionalidade política e a cultura política, compreendidas como um conjunto de formas de conduta e de sociabilidade, modos de vida e estilos de subjetivação e dizer verdadeiro.

  14. Política oriental de India: Mitos y realidades

    Directory of Open Access Journals (Sweden)

    Vaidyanathan Shivkumar

    2015-07-01

    Full Text Available La política exterior de la India desde su independencia el 15 agosto de 1947, ha sido de cooperación y conciliación, y no de confrontación. Ésta podría haber sido ampliada cuando los infiltrados pakistaníes entraron en el territorio de la India en 1948, ya que el entonces Primer Ministro instó a que este asunto se remitiera al recién formado Consejo Mundial de Naciones Unidas. Si se recorre la historia, encontraríamos que las tres guerras entre India y Pakistán fueron iniciadas por Pakistán ante lo cual la India tuvo que defender su territorio. Similar situación surgió cuando China rompió unilateralmente el acuerdo de Pancha Sheel, invadiendo el territorio de la India. Este artículo hace un modesto intento de trazar la política de la India hacia el cercano oriente o hacia las naciones del sureste. Describe los vínculos históricos y culturales entre la India y las naciones del sur de Asia oriental y la consolidación definitiva de la “política hacia el oriente de la India”. En este artículo se toman en consideración los intereses económicos y estratégicos de la región y se espera que pudiera permitir a los lectores entender la política de la India hacia las naciones del sudeste de Asia.

  15. Áreas de polígonos via determinantes

    OpenAIRE

    Zerbinatti, Paulo Henrique [UNESP

    2015-01-01

    The aim of this work is to present a study on areas of polygons through their vertex coordinates. We treat the subject using determinants of order 2 and basic Euclidean Geometry O objetivo deste trabalho e apresentar um estudo sobre o c alculo de areas de pol gonos atrav es das coordenadas de seus v ertices. Faremos isto utilizando determinantes de ordem 2 e conceitos b asicos de Geometria Euclidiana Plana

  16. FHC: o intelectual como político

    Directory of Open Access Journals (Sweden)

    Celso Lafer

    2009-03-01

    Full Text Available Este artigo parte do exame dos múltiplos papéis que nas sociedades contemporâneas os intelectuais desempenham na vida política. Aponta a tendência à imperícia no trato da realidade política por parte dos intelectuais no exercício do poder. Neste contexto, discute-se como e por que FHC é um raro caso de um intelectual bem-sucedido na vida política de um país complexo, de escala continental, com as características do Brasil contemporâneo. Aquilata-se, finalmente, a maneira pela qual FHC conjugou teoria e experiência nos seus juízos políticos perante as especificidades das conjunturas com as quais lidou na presidência e como combinou, na sua liderança, a dimensão da mudança e da pacificação, tendo sempre presente o "quadro mental" e o sentido de direção da sua visão intelectual.The point of departure of the article is a discussion of the social roles intellectuals play in the political life of modern societies. Subsequently an analysis of the difficulties that intellectuals tend to have, when exercising power, in dealing with political realities is presented. In this context the article discusses the why and the how FHC is a rare case of a successful intellectual in the politics of a complex democratic country, of continental dimension, with the specificities of contemporary Brazil. The association of theory and experience in the political judgment of FHC in dealing with the realities he faced as President is explored as well as his style of leadership that blended change and pacification, always bearing in mind the sense of direction of his outlook as an intellectual.

  17. A interincompreensão gera polêmica: alteridade e heterogeneidade nos discursos das cantoras Anitta e Pitty sobre comportamento sexual feminino

    Directory of Open Access Journals (Sweden)

    Juliane de Araújo Gonzaga

    2017-01-01

    Full Text Available Este artigo se propõe a analisar a situação de polêmica entre as cantoras Anitta e Pitty, durante um programa televiso, em torno do comportamento das mulheres no domínio da sexualidade. Os objetivos específicos são: (i verificar como a alteridade e a heterogeneidade delimitam posições discursivas; (ii descrever a situação de polêmica e a mobilização de simulacros no processo de interincompreensão regrada e (iii analisar a situação de polêmica e demonstrar que a alteridade e a heterogeneidade materializam embates legitimados historicamente no campo da sexualidade. Situado na Análise do Discurso francesa, este trabalho utiliza referencial teórico-metodológico baseado nos pressupostos de Authier-Revuz (1990, 1998, acerca da alteridade e da heterogeneidade enunciativa, e nas considerações de Maingueneau (1993, 2005 sobre o primado do interdiscurso e a polêmica como interincompreensão regrada. O método de análise baseia-se na descrição e interpretação de marcas linguísticas (glosas, pronomes, dêiticos, vocabulário que materializam jogos de alteridade, movimentos de já-ditos e regras sobre o dizível e o indizível no discurso. Por fim, a análise conclui que os enunciados são heterogeneamente marcados e que as posições discursivas produzem situação de polêmica, pois são atravessadas por simulacros, estereótipos e embates históricos entre os gêneros no domínio da sexualidade.

  18. Políticas del posgrado en México

    Directory of Open Access Journals (Sweden)

    Víctor Martiniano Arredondo Galván

    2006-01-01

    Full Text Available El artículo define, documenta y analiza la evolución de las políticas públicas de la educación superior en México, específicamente del posgrado. Se subraya que el desarrollo del posgrado en el país ha estado supeditado al devenir de la educación superior y al de la ciencia y la tecnología. A su vez se hace hincapié en que las políticas públicas han sido promovidas e instrumentadas por una diversidad de organismos e instancias ubicadas en la administración pública. Un punto medular del trabajo está en las consideraciones en torno a las políticas públicas del posgrado actual; las cuales están supeditadas y gravitan sobre el instrumento que conjuntamente la SEP y el CONACYT han establecido en los últimos años: el Programa de Fortalecimiento del Posgrado Nacional, el cual instituye un nuevo Padrón Nacional de Posgrado que clasifica los programas como competentes a nivel internacional y como de alto nivel; así como su reconocimiento en cuanto a su complejidad y heterogeneidad.

  19. Controlling optics contamination at the PolLux STXM

    Science.gov (United States)

    Watts, B.; Pilet, N.; Sarafimov, B.; Witte, K.; Raabe, J.

    2018-04-01

    Contamination of X-ray mirror surfaces by carbon is a common issue that can significantly degrade the optical performance of the instrument. The effects can be severe at photon energies near the carbon K-edge (ca. 300 eV), where the X-rays are strongly attenuated, but also significant at higher photon energies where the carbon coating affects the reflectivity and surface shape of the mirrors. [1] The Swiss Light Source has typically relied on in-situ plasma cleaning to control mirror contamination and the PolLux scanning transmission X-ray microscopy (STXM) beamline has also been employing further contamination reduction strategies in recent years. In particular, in 2014 we installed a 1×10‑8 mbar background pressure of O2 on the PolLux first mirror chamber. We present a history of efforts to control optical contamination at the PolLux beamline and report on the observed efficiencies of the different processes employed both for the in-vacuum optics and critical components of the frequently vented STXM experiment chamber.

  20. Política de antibióticos

    Directory of Open Access Journals (Sweden)

    Juan José Pisonero Socías

    Full Text Available La utilización inadecuada de los antimicrobianos ha traído como consecuencia un incremento de la resistencia de los microorganismos y un aumento en los costos hospitalarios. Esta situación provoca mala calidad en el servicio. Durante 2 años se aplicó una política racional inducida a reducir el uso, o poner en reposo, a los antimicrobianos poco efectivos o inefectivos, en todo el servicio médico del Hospital Clinicoquirúrgico Docente "Joaquín Albarrán", de Ciudad de La Habana, Cuba. Se aplicaron procederes y métodos creados por un equipo multidisciplinario. La forma de restricción del uso de antimicrobianos, a partir de un Grupo de Control, muestra alentadores resultados. En el trabajo se explican las funciones de este grupo. Se obtuvieron resultados concretos en la disminución de la resistencia microbiana frente a los antimicrobianos más utilizados. Son significativos los datos que muestran la reducción de costos y volúmenes de antibióticos usados en relación con el año de referencia, período en el que aún no se practicaba la política actual. La investigación demostró, que esta política es aplicable en cualquier hospital, a bajo costo y con resultados a corto plazo

  1. Bartleby o la política del caos

    Directory of Open Access Journals (Sweden)

    Andrés Camilo Torres Estrada

    2013-01-01

    Full Text Available El artículo presenta un análisis del cuento de Herman Melville: “Bartleby, el escribiente”. Este análisis parte de un acercamiento a la literatura desde una noción de política inspirada en autores como Jacques Derrida y Jacques Rancière, pero que se aparta de esta filosofía cuando, por encima del propio texto y sus posibilidades, se pretende encontrar en él heterotopías, esperanzas y comunidades por venir. Esta noción de política acerca a la literatura al mundo efectivo, transfigurando los modos de ser y no ser. Así, el personaje de Bartleby se presenta en medio del mundo de la representación como un agente del caos. En esto consiste la política del escribiente: su incursión devela las farsas del mundo construido y soñado por los hombres; pero esta destrucción que causa es inútil: el mundo de la representación ha sentido su absurdo, no sabe qué hacer con dicho agente del caos, pero no es suficiente para arruinarlo. Bartleby, quien se ha indeterminado y ha abandonado las dualidades de ser y no ser, tampoco puede seguir viviendo: ya no hay espacio para la vida sin referencias en un mundo humano y ficticio.

  2. Reformas constitucionales y competencia política en Bolivia

    Directory of Open Access Journals (Sweden)

    Mario Torrico

    2017-03-01

    El presente artículo explica  las  causas  y  efectos del cambio institucional en contextos políticos en los que no hay garantía sobre el cumplimiento estricto de  las reglas.  Analizando  la  reforma  política  de  2005  que  posibilitó  (por primera vez  que   en   Bolivia   los   prefectos   o  gobernadores  puedan  ser elegidos por voto popular,  se  halla  evidencia  que  indica  que  cuando  hay crisis  de  legitimidad,  las  coaliciones  declinantes  impulsan  cambios inclu-yentes  que  reducen   sus   futuras   pérdidas  electorales  y  no  pueden  ser revertidos por las coaliciones ascendentes que llegan al poder. No obstante, éstas intentan limitar el grado de inclusión de las reglas a través de cambios normativos de menor nivel que disminuyen la competencia política.

  3. La política supranacional : un nuevo campo de conocimiento para abordar las políticas educativas en un mundo globalizado

    OpenAIRE

    Valle, Javier M.

    2012-01-01

    El presente artículo trata de explicar la aparición de la Política Educativa Supranacional como área del saber pedagógico, en íntima conexión con la Política Educativa, la Educación Comparada y la Educación Internacional, tratando de acotar s

  4. TBscore II

    DEFF Research Database (Denmark)

    Rudolf, Frauke; Lemvik, Grethe; Abate, Ebba

    2013-01-01

    Abstract Background: The TBscore, based on simple signs and symptoms, was introduced to predict unsuccessful outcome in tuberculosis patients on treatment. A recent inter-observer variation study showed profound variation in some variables. Further, some variables depend on a physician assessing...... them, making the score less applicable. The aim of the present study was to simplify the TBscore. Methods: Inter-observer variation assessment and exploratory factor analysis were combined to develop a simplified score, the TBscore II. To validate TBscore II we assessed the association between start...

  5. Política nacional de assistência social: uma avaliação política

    OpenAIRE

    Araujo, Victor Martins Lopes de

    2013-01-01

    Este trabalho tem com objetivo principal realizar uma avaliação política da Política Nacional de Assistência Social através de uma leitura crítica de seus textos legais. Nesse sentido, realizou-se uma fundamentação teórica pautada na discussão das diferentes concepções de Estado encontradas na teoria social clássica bem como na teoria social crítica, sendo feito também uma discussão a respeito da administração como forma de dominação, nos apropriamos do debate acerca da burocracia presente em...

  6. Seminario Políticas Públicas y Gestión Estatal | Tema 2: Ciclo y agenda de las políticas públicas

    OpenAIRE

    Pagani, María Laura

    2017-01-01

    Presentación general del ciclo de política pública y las diferentes etapas. Sus limitaciones como recurso de análisis de las PP. Agenda Social y Agenda Política: los procesos de construcción de la Agenda política, diseño. Definición de política pública. Presentación general del ciclo de política pública y las diferentes etapas. Sus limitaciones como recurso de análisis de las PP. La formación de la agenda y la definición de problema público. Las diferentes agendas: la agenda ciudadana, públic...

  7. Genome-wide analysis of KAP1, the 7SK snRNP complex, and RNA polymerase II

    Directory of Open Access Journals (Sweden)

    Ryan P. McNamara

    2016-03-01

    Full Text Available The transition of RNA polymerase II (Pol II from transcription initiation into productive elongation in eukaryotic cells is regulated by the P-TEFb kinase, which phosphorylates the C-terminal domain of paused Pol II at promoter-proximal regions. Our recent study found that P-TEFb (in an inhibited state bound to the 7SK snRNP complex interacts with the KAP1/TRIM28 transcriptional regulator, and that KAP1 and the 7SK snRNP co-occupy most gene promoters containing paused Pol II. Here we provide a detailed experimental description and analysis of the ChIP-seq datasets that have been deposited into Gene Expression Omnibus (GEO: GS72622, so that independent groups can replicate and expand upon these findings. We propose these datasets would provide valuable information for researchers studying mechanisms of transcriptional regulation including Pol II pausing and pause release. Keywords: P-TEFb/7SK snRNP, KAP1, RNA polymerase II, ChIP-seq, Transcription elongation

  8. Pb II

    African Journals Online (AJOL)

    Windows User

    This investigation describes the use of non-living biomass of Aspergillus caespitosus for removal of ... Pb(II) production has exceeded 3.5 million tons per year. It has been used in the ... This biomass was selected after screening a wide range of microbes. .... prolonged, which proved better biopolymer in metal uptake (Gadd ...

  9. Association with Aurora-A Controls N-MYC-Dependent Promoter Escape and Pause Release of RNA Polymerase II during the Cell Cycle

    DEFF Research Database (Denmark)

    Büchel, Gabriele; Carstensen, Anne; Mak, Ka-Yan

    2017-01-01

    MYC proteins bind globally to active promoters and promote transcriptional elongation by RNA polymerase II (Pol II). To identify effector proteins that mediate this function, we performed mass spectrometry on N-MYC complexes in neuroblastoma cells. The analysis shows that N-MYC forms complexes...

  10. O trabalho familiar extrativista sob a influência de políticas públicas

    Directory of Open Access Journals (Sweden)

    Dalva Maria da Mota

    2014-01-01

    Full Text Available O artigo analisa a relação entre a organização do trabalho familiar no extrativismo e a participação em programas de políticas públicas no estado de Sergipe. Com abordagem predominantemente qualitativa, a pesquisa foi realizada com mulheres autodesignadas catadoras de mangaba e marisqueiras, reconhecidas como pertinentes ao segmento dos denominados povos e comunidades tradicionais e afiliadas ao Programa Bolsa Família (PBF, ao Seguro Desemprego do Pescador Artesanal (SDPA e ao Programa de Aquisição de Alimentos (PAA. A metodologia constou de observações e entrevistas com diferentes atores envolvidos na atividade extrativista e nos programas de políticas públicas. As principais conclusões mostram que os programas de políticas públicas influenciam: i na reorganização do cotidiano do trabalho no extrativismo, principalmente no tocante à diminuição do envolvimento de crianças e jovens na atividade e quanto à intensidade das jornadas; ii no reforço aos papéis tradicionais de homens e mulheres, no caso do PBF, e na diluição de fronteiras entre esses mesmos papéis no PAA; iii na diminuição do volume de trabalho no caso do SDPA e no aumento no PAA; e iv nos diferentes sentidos que são atribuídos ao trabalho.

  11. Los efectos de la comunicación política en el comportamiento electoral

    Directory of Open Access Journals (Sweden)

    Ismael Crespo Martínez

    2015-07-01

    Full Text Available La comunicación política es un aspecto fundamental de todos los procesos políticos contemporáneos. De hecho, el análisis político de la realidad, bien sea para realizar cálculos estratégicos, o bien para tratar de profundizar en la comprensión de las dinámicas socio-políticas, ya no puede obviar el papel central de la comunicación política en las sociedades. A partir de esta afirmación, los autores exponen a través de un recorrido histórico la influencia y efectos de la comunicación en la política, incluyendo las nuevas tendencias con los avances de las tecnologías de la comunicación

  12. Super Resolution Fluorescence Microscopy and Tracking of Bacterial Flotillin (Reggie Paralogs Provide Evidence for Defined-Sized Protein Microdomains within the Bacterial Membrane but Absence of Clusters Containing Detergent-Resistant Proteins.

    Directory of Open Access Journals (Sweden)

    Felix Dempwolff

    2016-06-01

    Full Text Available Biological membranes have been proposed to contain microdomains of a specific lipid composition, in which distinct groups of proteins are clustered. Flotillin-like proteins are conserved between pro-and eukaryotes, play an important function in several eukaryotic and bacterial cells, and define in vertebrates a type of so-called detergent-resistant microdomains. Using STED microscopy, we show that two bacterial flotillins, FloA and FloT, form defined assemblies with an average diameter of 85 to 110 nm in the model bacterium Bacillus subtilis. Interestingly, flotillin microdomains are of similar size in eukaryotic cells. The soluble domains of FloA form higher order oligomers of up to several hundred kDa in vitro, showing that like eukaryotic flotillins, bacterial assemblies are based in part on their ability to self-oligomerize. However, B. subtilis paralogs show significantly different diffusion rates, and consequently do not colocalize into a common microdomain. Dual colour time lapse experiments of flotillins together with other detergent-resistant proteins in bacteria show that proteins colocalize for no longer than a few hundred milliseconds, and do not move together. Our data reveal that the bacterial membrane contains defined-sized protein domains rather than functional microdomains dependent on flotillins. Based on their distinct dynamics, FloA and FloT confer spatially distinguishable activities, but do not serve as molecular scaffolds.

  13. Espacios de socialización política y representaciones de la política en la Universidad de Antioquia

    Directory of Open Access Journals (Sweden)

    Deicy Patricia Hurtado Galeano

    2017-01-01

    Full Text Available Este artículo describe los procesos de socialización política de los universitarios a través de las interacciones cara a cara —en la familia, en el vecindario, en la universidad— y de los medios de comunicación análogos —televisión, radio, prensa— y virtuales —redes sociales, blogs—. Una vez analizado cómo se informan sobre política y en qué espacios hablan de estos temas, se analiza el interés en la política, así como las imágenes que los universitarios tienen de esta. Con base en estas variables se concluye que la Universidad es un entorno político en el que no puede verificase una apatía política en los actores clave de la vida universitaria —estudiantes, profesores y empleados administrativos—, no solo porque sí les interesan estos asuntos, sino porque se informan y conversan sobre política en distintos espacios de socialización, se sienten con capacidades y competencias para enfrentar esa esfera, y predomina una visión crítica de la política y de la forma como es conducida en la sociedad colombiana.

  14. Seguridad humana y recursos naturales - política de seguridad en Colombia

    OpenAIRE

    Echeverría Rodríguez, Aura María

    2010-01-01

    El presente trabajo de grado atiende el nuevo concepto de política (biopolítica) que ha sido definido, por algunos autores como la política alrededor de la vida (bios), y el nuevo concepto de seguridad (seguridad humana) que cobija dentro de sus dimensiones, la seguridad medio ambiental. Esos nuevos conceptos justifican el interés de hacer un análisis de la política de seguridad en Colombia, especialmente, de la política de seguridad frente a los recursos naturales que son el fundamento de la...

  15. Políticas sobre Sexualidad: Reportes desde las Líneas del Frente

    OpenAIRE

    Petchesky, Rosalind; Vianna, Adriana R. B.; Carrara, Sergio

    2008-01-01

    Políticas sobre sexualidad: reportes desde las líneas del frente, es un estudio comparativo de las políticas de sexualidad, la salud sexual y los derechos sexuales en ochos países y en dos instituciones mundiales. El trabajo contenido en Políticas sobre sexualidad ha sido desarrollado bajo el auspicio del Sexual Policy Watch [Observatorio de Políticas Sexuales] (SPW), un foro mundial compuesto por investigadores y activistas de una amplia gama de países y regiones del mundo. Inspirado en inic...

  16. Chaos excited chaos synchronizations of integral and fractional order generalized van der Pol systems

    International Nuclear Information System (INIS)

    Ge Zhengming; Hsu Maoyuan

    2008-01-01

    In this paper, chaos excited chaos synchronizations of generalized van der Pol systems with integral and fractional order are studied. Synchronizations of two identified autonomous generalized van der Pol chaotic systems are obtained by replacing their corresponding exciting terms by the same function of chaotic states of a third nonautonomous or autonomous generalized van der Pol system. Numerical simulations, such as phase portraits, Poincare maps and state error plots are given. It is found that chaos excited chaos synchronizations exist for the fractional order systems with the total fractional order both less than and more than the number of the states of the integer order generalized van der Pol system

  17. Esquema de evaluación para instrumentos de política ambiental

    OpenAIRE

    Mariana Bobadilla; Martha Ileana Espejel Carbajal; Francisco Lara Valencia; Saul Álvarez Borrego; Sophie Ávila Foucat; José Luis Fermán Almada

    2013-01-01

    La evaluación de la política ambiental ha avanzado lentamente en México por varias razones que incluyen la novedad y rápida evolución de los instrumentos de política ambiental; la complejidad de los problemas ambientales y la inexistencia de modelos de evaluación estandarizados para los evaluadores de dicha política. Este artículo propone un esquema metodológico para la evaluación en tres etapas de los instrumentos de política ambiental. El método identifica la funcionalidad del instrumento d...

  18. A centralidade das políticas sociais no modelo de desenvolvimento britânico do Novo Trabalhismo

    Directory of Open Access Journals (Sweden)

    André Simões

    2014-12-01

    Full Text Available O presente artigo tem como objetivo analisar a centralidade das políticas sociais na estratégia de desenvolvimento britânica no governo do Novo Trabalhismo. Pretende-se mostrar que a concepção de solidariedade e coesão social que marcaram a formação do Welfare State britânico no Pós-II Guerra Mundial foi substituída por uma visão em que as políticas sociais estariam voltadas para o aumento da competitividade e expansão dos mercados, fato este que redefiniu o sistema de proteção social britânico nos moldes do Welfare to Work. Neste sentido, buscar-se-á mostrar a ausência de conexão entre o discurso centrado na exclusividade do mercado de trabalho como lócus do bem-estar social e as evidências empíricas concretamente verificadas.

  19. Nuevas políticas sociales y Estado social relacional.

    Directory of Open Access Journals (Sweden)

    PIERPAOLO DONATI

    2004-01-01

    Full Text Available Según el autor, las sociedades europeas siguen inspirando las políticas sociales en un código (estatal de inclusión ?al que aquí se denomina lib/lab (mezcla de liberalismo y laborismo? que en el pasado ha constituido un factor de progreso, pero que actualmente resulta cada vez más débil y obsoleto. Las políticas sociales encuentran límites estructurales en sus posibilidades de innovación porque están formuladas como compromisos entre Estado y mercado, utilizando al sector terciario para remediar los fracasos de los otros dos sectores. De hecho, los sistemas sociales gobernados por lógicas lib/lab se encaminan a una crisis irreversible. El documento ilustra las nuevas tendencias de configuración de las políticas sociales, que aquí se denominan "societarias ". Se caracterizan por dos novedades principales: primero, por el hecho de que confían la inclusión social a una ciudadanía compleja (concebida como entrelazamiento de ciudadanía estatal y ciudadanía societaria, en la cual poseen un papel primordial los sujetos colectivos de la sociedad civil; segundo, porque definen el Bienestar, los servicios y los derechos sociales mediante un código simbólico de tipo relacional. En términos de orden institucional, se trata de pasar a un "cuarto modelo de Estado del Bienestar", es decir, a un Estado social de cuarta generación, después de haber dejado atrás el paternalista, el asistencial y el intervencionista. El autor lo denomina Estado social relacional.

  20. Democracia liberal e inestabilidad política en Ecuador

    OpenAIRE

    Andrade A., Pablo

    2005-01-01

    Se explora el reciente cambio de gobierno en Ecuador a la luz de las siguientes hipótesis: 1) la inestabilidad política que caracteriza al Ecuador desde hace nueve años; 2) esta fase como resultado de las contradicciones creadas por el intento de reconciliar una economía organizada en torno al libre mercado con los procedimientos de una democracia representativa; 3) el proceso que ha llevado en los últimos trece años a la desarticulación de las instituciones democráticas en Ecuador. Se desarr...

  1. Libertad, equidad y política educativa

    OpenAIRE

    Bonal, Xavier

    2008-01-01

    El autor señala que aquellos que toman las decisiones de política educativa no contemplan las variables necesarias que aseguren la igualdad de oportunidades y la equidad, respecto a la elección de centro, y no atienden a un principio de justicia distributiva que describe en este artículo. Cree que aquel alumnado con un menor nivel social o cultural no está recibiendo, en el modelo actual, la mejor educación posible.

  2. Hacia una historia política de la escritura

    Directory of Open Access Journals (Sweden)

    Rafael Gómez Pardo

    2010-10-01

    Full Text Available En el artículo se presentan algunos de los temas más recurrentes que se pueden abordar en el proyecto de una historia política de la escritura, retomando los planteamientos de Roger Chartier y Michel Foucault. Se define de manera propedéutica el significado y el alcance de este proyecto, y su importancia para los estudios sobre los usos de la escritura en la historia occidental, teniendo en cuenta que en ésta se sedimentan y reproducen poderes, y en su ordenamiento social, emergen nuevos sujetos (el autor, por ejemplo.

  3. Hacia una historia política de la escritura

    OpenAIRE

    Rafael Gómez Pardo

    2010-01-01

    En el artículo se presentan algunos de los temas más recurrentes que se pueden abordar en el proyecto de una historia política de la escritura, retomando los planteamientos de Roger Chartier y Michel Foucault. Se define de manera propedéutica el significado y el alcance de este proyecto, y su importancia para los estudios sobre los usos de la escritura en la historia occidental, teniendo en cuenta que en ésta se sedimentan y reproducen poderes, y en su ordenamiento social, emergen nuevos suje...

  4. Choques de colas anchas y política monetaria

    OpenAIRE

    Ortiz, Marco

    2015-01-01

    Este documento extiende el modelo de Kato y Nishiyama (2005) al introducir choques de colas anchas en un marco neokeynesiano simple, en el que el banco central considera en forma explícita la restricción de no negatividad de la tasa de interés. Los choques con curtosis excesiva hacen que la política monetaria sea más agresiva lejos de la región restringida. Sin embargo, esta diferencia se revierte a medida que la economía se aproxima a la región restringida. Desde un punto de vista cuantitati...

  5. Constant envelope OFDM scheme for 6PolSK-QPSK

    Science.gov (United States)

    Li, Yupeng; Ding, Ding

    2018-03-01

    A constant envelope OFDM scheme with phase modulator (PM-CE-OFDM) for 6PolSK-QPSK modulation was demonstrated. Performance under large fiber launch power is measured to check its advantages in counteracting fiber nonlinear impairments. In our simulation, PM-CE-OFDM, RF-assisted constant envelope OFDM (RF-CE-OFDM) and conventional OFDM (Con-OFDM) are transmitted through 80 km standard single mode fiber (SSMF) single channel and WDM system. Simulation results confirm that PM-CE-OFDM has best performance in resisting fiber nonlinearity. In addition, benefiting from the simple system structure, the complexity and cost of PM-CE-OFDM system could be reduced effectively.

  6. Perú: marketing político y Vladivideos

    Directory of Open Access Journals (Sweden)

    Fernando Palomino V.

    2015-01-01

    Full Text Available En detalle señala las características de las elecciones 2001, convocadas por el Gobierno de transición, tras la caída del régimen de Fujimori. Esboza el perfil de los candidatos que se terciaron; comenta sobre los vladivideos; afirma que fueron los medios de comunicación los protagonistas de las elecciones, definieron la agenda política y fueron determinantes en los resultados finales. La cobertura diaria por televisión de los vladivideos convirtió el tema de la corrupción en show y espectáculo de masas.

  7. Analytical solution for Van der Pol-Duffing oscillators

    International Nuclear Information System (INIS)

    Kimiaeifar, A.; Saidi, A.R.; Bagheri, G.H.; Rahimpour, M.; Domairry, D.G.

    2009-01-01

    In this paper, the problem of single-well, double-well and double-hump Van der Pol-Duffing oscillator is studied. Governing equation is solved analytically using a new kind of analytic technique for nonlinear problems namely the 'Homotopy Analysis Method' (HAM), for the first time. Present solution gives an expression which can be used in wide range of time for all domain of response. Comparisons of the obtained solutions with numerical results show that this method is effective and convenient for solving this problem. This method is a capable tool for solving this kind of nonlinear problems.

  8. La política entre rejas: el devotazo

    Directory of Open Access Journals (Sweden)

    2010-05-01

    Full Text Available En vísperas de la asunción de Héctor Cámpora a la presidencia de la Argentina el 25 de mayo de 1973, el penal de Villa Devoto fue tomado por los prisioneros. Las presiones nacionales e internacionales para la liberación de los detenidos por razones políticas, y el compromiso adoptado por el futuro presidente desde su campaña electoral, lo conducirían a firmar un decreto que sería posteriormente aprobado por el congreso. En ese marco, Alicia Sanguinetti, militante del ERP (Ejército Revoluciona...

  9. Derechos humanos, política y fútbol

    OpenAIRE

    Franco, Marina

    2008-01-01

    La dictadura militar instaurada en 1976 intentó diversas operaciones ideológicas tendientes a la construcción de consenso. Si la más dramática de ellas fue la Guerra de Malvinas, la otra muy significativa -pero por su éxito- fue el Campeonato Mundial de Fútbol de 1978. La realización del evento y la denuncia de una supuesta "campaña antiargentina" desde el exterior fueron dos operaciones mediáticas de la Junta Militar destinadas a construir cierta legitimidad política en el momento mismo en q...

  10. Políticas culturales y cultura política en una organización campesina del Magdalena Medio colombiano

    Directory of Open Access Journals (Sweden)

    Nydia Constanza Mendoza Romero

    2011-04-01

    Full Text Available El artículo se orienta a la comprensión de algunas relaciones entre cultura y poder que median los procesos organizativos inscritos en zonas de conflicto social y armado colombiano. En particular, se analiza la forma en la cual, en la configuración histórica de una organización campesina en Cimitarra, se van imbricando las políticas culturales, que desde este tipo de agrupaciones se despliegan, con las culturas políticas locales y nacionales, proceso en el que se van redefiniendo también los modos de asumir lo político.

  11. Small Diameter Bomb Increment II (SDB II)

    Science.gov (United States)

    2015-12-01

    Selected Acquisition Report (SAR) RCS: DD-A&T(Q&A)823-439 Small Diameter Bomb Increment II (SDB II) As of FY 2017 President’s Budget Defense... Bomb Increment II (SDB II) DoD Component Air Force Joint Participants Department of the Navy Responsible Office References SAR Baseline (Production...Mission and Description Small Diameter Bomb Increment II (SDB II) is a joint interest United States Air Force (USAF) and Department of the Navy

  12. Joint ventures e a política antitruste brasileira

    Directory of Open Access Journals (Sweden)

    Ana Paula Avellar

    2012-12-01

    Full Text Available As políticas de defesa da concorrência integram atualmente o conjunto fundamental de instituições necessárias à promoção do crescimento e a busca das sociedades por arranjos mais eficientes. O presente trabalho tem como objetivo realizar uma análise da política antitruste brasileira concentrando-se no tratamento dado pelas autoridades à constituição de joint ventures. Na realização dessa tarefa, foram feitas revisões teóricas, constatações acerca dos procedimentos de autoridades internacionais sobre o assunto e um estudo empírico abordando casos julgados no Brasil entre os anos de 2002 e 2010. O resultado encontrado revela a inexistência de normatização específica para o tratamento das joint ventures no Brasil, culminando, assim, em uma relativa discricionariedade por parte dos órgãos do SBDC na análise desses atos.

  13. Nuevas pantallas y política audiovisual

    Directory of Open Access Journals (Sweden)

    Francisco Sierra Caballero

    2016-11-01

    Full Text Available La guerra de las pantallas es hoy la quiebra de un orden televisivo en transición a una ecología compleja post Galaxia Marconi, basada en los nuevos hábitos de consumo y de vida. Un problema político, sin ninguna duda, si entendemos que la Comunicación es una Ciencia de lo Común. Una interpretación simple del futuro del audiovisual tiende a poner énfasis solo en las transformaciones tecnológicas. Ciertamente, los cambios en equipamientos, la revolución digital es un factor disruptor del sistema cultural que hay que tomar en cuenta por su relevancia. Ahora bien, insistimos, el acto de ver, la discrecionalidad de la ventana indiscreta nos confronta con el universo ético y político de la mediación como reproducción social. Pues la tecnología no es neutral, ni la comunicación un simple instrumento de transmisión.

  14. Investimentos diretos estrangeiros e políticas de desenvolvimento

    Directory of Open Access Journals (Sweden)

    Antônio Corrêa de Lacerda

    2008-05-01

    Full Text Available O artigo discute alternativas para a inserção internacional da economia brasileira, especialmente no que se refere ao papel dos investimentos diretos estrangeiros, da geração de valor agregado local e do desempenho das exportações, a partir do cenário da globalização e suas transformações. Na primeira parte analisa-se a competitividade dos países em desenvolvimento e, na segunda parte, discutem-se estratégias de política econômica para uma inserção internacional mais ativa na economia brasileira. Palavras-chave: investimentos diretos estrangeiros; globalização; inserção externa; políticas de desenvolvimento. Abstract The article discusses alternatives for the international insertion of Brazilian economy especially considering the role of foreign direct investments, the creation of local aggregated value and the exportations performance from the scene of the globalization and its transformations. In the first part, the competitiveness of developing countries is analyzed and in the second part, strategies of economic policy for a more active international of Brazilian economy are discussed. Keywords: foreign direct investments, globalization, international insertion, development policies.

  15. Política, Democracia y Utopía

    Directory of Open Access Journals (Sweden)

    Mirta A. Giacaglia

    2006-01-01

    Full Text Available La pregunta crucial que hoy nos formulamos es: ¿cómo hacer para reinventar el espacio de lo político en las condiciones instituidas por el proceso de globalización neoliberal? Las últimas décadas se han caracterizado por el eclipse de la política subordinada a la economía y a las fuerzas del mercado. En relación a esta cuestión, clave para pensar la posibilidad de proyectos emancipatorios alternativos, es necesario reflexionar sobre la justicia, la igualdad, la libertad, los lazos sociales, el problema de la representación y los nuevos movimientos sociales de resistencia. Desde esta apelación a los sujetos y a la invención por parte de las fuerzas sociales, es necesario reactivar las fuerzas instituyentes de la utopía para articular libertad e igualdad en el horizonte de otra mundialización. El proyecto de una sociedad justa y solidaria, sólo será posible desde un pensamiento creativo que se atreva a pensar lo no pensado, las líneas de fuga, el acontecimiento.

  16. Cuando lo educativo es político

    Directory of Open Access Journals (Sweden)

    María Victoria Martin

    2016-09-01

    Full Text Available Entre las bases de la Modernidad, encontramos el espacio público como lugar de construcción de ciudadanía y la escuela como dispositivo central para nuclear a los ciudadanos en torno a un proyecto en común. Sin embargo, más de un siglo después de que se instalara la obligatoriedad de la educación en nuestro país mediante la ley 1420, el principio homogeneizador de las instituciones educativas de los Estados nacionales mostró que dejaba por fuera grandes porciones de población. Frente a esto, en la década pasada se gestaron nuevos espacios formativos que buscan priorizar las posibilidades de cambio y que entienden a la educación como instancia política de participación y expresión de los sujetos. Este artículo reflexiona sobre las nociones de espacio público, la relación política-educación y el cambio social articulando estas ideas para concluir con una aproximación a prácticas de comunicación-educación en el partido de Quilmes.

  17. Colombia en torno la prensa política

    Directory of Open Access Journals (Sweden)

    Claudine Bancelin de Emiliani

    2015-05-01

    Full Text Available Para comprender el contenido de los mensajes que lanzan los partidos políticos colombianos -a través de los discursos de sus dirigentes, es necesario esclarecer de dónde provienen dichos mensajes y en qué sociedad concreta se dan, ya que ellos no son un objeto aislado, sino que forman parte de una totalidad, de una estructura, donde los elementos que la conforman están interrelacionados e interactuan entre si. Partiendo del punto de que un ámbito, el quehacer económico es el que determina en última instancia el funcionamiento de una sociedad, el estudio de esta es posible a través del modo de producción dominante. Es así como la estructura económica condiciona la estructura ideológica y la jurídica política. A través del estudio de la formación social es posible comprender la estructura total con su movilidad, donde se llega al momento actual en que la sociedad colombiana está caracterizada por un modo de producción capitalista.

  18. Indústria cinematográfica brasileira de 1995 a 2012: estrutura de mercado e políticas públicas

    Directory of Open Access Journals (Sweden)

    Rodrigo Cavalcante Michel

    2014-12-01

    Full Text Available O objetivo do trabalho é analisar a estrutura da indústria cinematográfica brasileira e o papel das políticas públicas dirigidas ao setor no período de 1995 a 2012. O estudo identifica as empresas atuantes nos diferentes elos da cadeia produtiva – produção, distribuição e exibição – e utiliza os índices de concentração CR(4, CR(8 e o índice Hirschman-Herfindahl (HHI para caracterizar a estrutura de mercado em cada uma das etapas do processo produtivo. Entre os resultados encontrados, destaca-se que: i a estrutura do setor é fortemente concentrada nos três elos da cadeia produtiva; ii a dinâmica setorial, especificamente o elo da produção, esteve fortemente relacionada às políticas públicas de apoio. Assim, o estudo conclui que, para desenvolvimento mais expressivo da indústria cinematográfica no Brasil, essas políticas devem atuar simultaneamente nas três etapas da cadeia produtiva, promovendo maior competitividade ao cinema nacional.

  19. La Gigantomaquia, símbolo socio-político en la concepción de la polis griega

    OpenAIRE

    Cristina Delgado Linacero

    1999-01-01

    Este estudio propone una interpretación del mito de la Gigantomaquia como símbolo político y sociológico de la evolución de la ciudad griega. Está basado en fuentes literarias y visuales que aparecieron entre los siglos viii y ii a.C. El desafío final a la autoridad de los Olímpicos viene de los Gigantes, hijos de Gala, nacidos de las gotas de sangre brotada de los miembros emasculados de Urano. Fue el tema del friso norte del Tesoro de los Sifnios en Deifi y tuvo una importancia particular e...

  20. Demos com o colosso em terra: o ocaso de José Bonifácio e a ascensão política de Aureliano Coutinho nas páginas do jornal A Verdade

    Directory of Open Access Journals (Sweden)

    Julio Bentivoglio

    2010-12-01

    Full Text Available Este artigo analisa a campanha movida por Aureliano Coutinho para destituir José Bonifácio da tutoria do futuro imperador Pedro II, travada a partir de seu jornal A Verdade entre 1832 e 1834. Indica como esta ação foi decisiva para a trajetória política de Aureliano, futuro visconde de Sepetiba, para alcançar a preeminência palaciana na corte imperial brasileira.

  1. One-dimensional Fermi accelerator model with moving wall described by a nonlinear van der Pol oscillator.

    Science.gov (United States)

    Botari, Tiago; Leonel, Edson D

    2013-01-01

    A modification of the one-dimensional Fermi accelerator model is considered in this work. The dynamics of a classical particle of mass m, confined to bounce elastically between two rigid walls where one is described by a nonlinear van der Pol type oscillator while the other one is fixed, working as a reinjection mechanism of the particle for a next collision, is carefully made by the use of a two-dimensional nonlinear mapping. Two cases are considered: (i) the situation where the particle has mass negligible as compared to the mass of the moving wall and does not affect the motion of it; and (ii) the case where collisions of the particle do affect the movement of the moving wall. For case (i) the phase space is of mixed type leading us to observe a scaling of the average velocity as a function of the parameter (χ) controlling the nonlinearity of the moving wall. For large χ, a diffusion on the velocity is observed leading to the conclusion that Fermi acceleration is taking place. On the other hand, for case (ii), the motion of the moving wall is affected by collisions with the particle. However, due to the properties of the van der Pol oscillator, the moving wall relaxes again to a limit cycle. Such kind of motion absorbs part of the energy of the particle leading to a suppression of the unlimited energy gain as observed in case (i). The phase space shows a set of attractors of different periods whose basin of attraction has a complicated organization.

  2. Uma ditadura contra a república: política econômica e poder político em Roberto Campos

    OpenAIRE

    Ricardo V. Silva

    2006-01-01

    O artigo examina o pensamento político de Roberto Campos entre meados das décadas de 1950 e 1970. Neste período, além de importantes funções governamentais, Campos dedicou-se intensamente à luta de idéias, publicando grande quantidade de artigos e ensaios. Será desenvolvida a hipótese de que o seu pensamento político aponta para a institucionalização de um sistema político de tipo autoritário como o mais adequado às condições culturais e políticas da sociedade brasileira. A principal caracter...

  3. Bridge helix bending promotes RNA polymerase II backtracking through a critical and conserved threonine residue

    KAUST Repository

    Da, Lin-Tai

    2016-04-19

    The dynamics of the RNA polymerase II (Pol II) backtracking process is poorly understood. We built a Markov State Model from extensive molecular dynamics simulations to identify metastable intermediate states and the dynamics of backtracking at atomistic detail. Our results reveal that Pol II backtracking occurs in a stepwise mode where two intermediate states are involved. We find that the continuous bending motion of the Bridge helix (BH) serves as a critical checkpoint, using the highly conserved BH residue T831 as a sensing probe for the 3′-terminal base paring of RNA:DNA hybrid. If the base pair is mismatched, BH bending can promote the RNA 3′-end nucleotide into a frayed state that further leads to the backtracked state. These computational observations are validated by site-directed mutagenesis and transcript cleavage assays, and provide insights into the key factors that regulate the preferences of the backward translocation.

  4. Bridge helix bending promotes RNA polymerase II backtracking through a critical and conserved threonine residue

    KAUST Repository

    Da, Lin-Tai; Pardo-Avila, Fá tima; Xu, Liang; Silva, Daniel-Adriano; Zhang, Lu; Gao, Xin; Wang, Dong; Huang, Xuhui

    2016-01-01

    The dynamics of the RNA polymerase II (Pol II) backtracking process is poorly understood. We built a Markov State Model from extensive molecular dynamics simulations to identify metastable intermediate states and the dynamics of backtracking at atomistic detail. Our results reveal that Pol II backtracking occurs in a stepwise mode where two intermediate states are involved. We find that the continuous bending motion of the Bridge helix (BH) serves as a critical checkpoint, using the highly conserved BH residue T831 as a sensing probe for the 3′-terminal base paring of RNA:DNA hybrid. If the base pair is mismatched, BH bending can promote the RNA 3′-end nucleotide into a frayed state that further leads to the backtracked state. These computational observations are validated by site-directed mutagenesis and transcript cleavage assays, and provide insights into the key factors that regulate the preferences of the backward translocation.

  5. RNA-DNA Differences Are Generated in Human Cells within Seconds after RNA Exits Polymerase II

    Directory of Open Access Journals (Sweden)

    Isabel X. Wang

    2014-03-01

    Full Text Available RNA sequences are expected to be identical to their corresponding DNA sequences. Here, we found all 12 types of RNA-DNA sequence differences (RDDs in nascent RNA. Our results show that RDDs begin to occur in RNA chains ∼55 nt from the RNA polymerase II (Pol II active site. These RDDs occur so soon after transcription that they are incompatible with known deaminase-mediated RNA-editing mechanisms. Moreover, the 55 nt delay in appearance indicates that they do not arise during RNA synthesis by Pol II or as a direct consequence of modified base incorporation. Preliminary data suggest that RDD and R-loop formations may be coupled. These findings identify sequence substitution as an early step in cotranscriptional RNA processing.

  6. Las políticas públicas y la necesidad de una verdadera política social en Venezuela

    Directory of Open Access Journals (Sweden)

    Elys Gilbrando Mora Belandria

    2002-01-01

    Full Text Available El propósito de este artículo consiste en plantear algunos problemas que bloquean el camino hacia el desarrollo político y constituyen tarea urgente para el gobierno. Asimismo se trata de hacer un aporte abordando áreas estratégicas importantes en las estructuras del poder como es el caso de las políticas públicas, tal vez la más reciente e innovadora corriente de análisis presente en la Ciencia Política, incluyendo la política social como una de las exigencias de los ciudadanos frente al Estado y la democracia. Bajo este punto de vista las políticas públicas son consideradas una estrategia básica para legitimar el rendimiento del gobierno. Por último se abordan ciertos resultados de la mala política y sus efectos sobre la democracia pues, así lo entendemos, en Venezuela las tareas del gobierno en materia de políticas públicas han estado marcadas por una visión formalmente bien intencionada, pero que operativamente ha sido bloqueada por factores perturbadores como por ejemplo: la inconsistencia en la toma de decisiones, el centralismo, la corta visión para acercarse a los parámetros de una gerencia pública moderna, la excesiva politización de los trámites administrativos para emprender acciones concretas y la relación asimétrica entre el tamaño del Estado y la calidad del Estado, todo lo cual impide la realización correcta de los procedimientos para profundizar en la tarea obtener logros efectivos y eficientes en materia de política social y el avance hacia la modernización del sector público. .

  7. X-ray polarimetry with the Polarization Spectroscopic Telescope Array (PolSTAR)

    DEFF Research Database (Denmark)

    Krawczynski, Henric S.; Stern, Daniel; Harrison, Fiona A.

    2016-01-01

    This paper describes the Polarization Spectroscopic Telescope Array (PolSTAR), a mission proposed to NASA's 2014 Small Explorer (SMEX) announcement of opportunity. PolSTAR measures the linear polarization of 3-50 keV (requirement; goal: 2.5-70 keV) X-rays probing the behavior of matter,radiation ...

  8. Aproximaciones Sociológicas en Torno a la Cultura Política Colombiana

    OpenAIRE

    Eduardo Guevara Cobos

    1999-01-01

    Partiendo de referentes conceptuales que permiten definir cultura política, se pretende abordar, desde una perspectiva histórica, algunos de sus componentes, con el fin de analizar las actitudes, normas y valores que han caracterizado la cultura política de la sociedad colombiana.

  9. File list: Pol.PSC.10.AllAg.mESCs,_differentiated [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.PSC.10.AllAg.mESCs,_differentiated mm9 RNA polymerase Pluripotent stem cell mESCs, differentia...ted SRX590276 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.PSC.10.AllAg.mESCs,_differentiated.bed ...

  10. File list: Pol.PSC.05.AllAg.mESCs,_differentiated [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.PSC.05.AllAg.mESCs,_differentiated mm9 RNA polymerase Pluripotent stem cell mESCs, differentia...ted SRX590276 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.PSC.05.AllAg.mESCs,_differentiated.bed ...

  11. File list: Pol.PSC.50.AllAg.mESCs,_differentiated [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.PSC.50.AllAg.mESCs,_differentiated mm9 RNA polymerase Pluripotent stem cell mESCs, differentia...ted SRX590276 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.PSC.50.AllAg.mESCs,_differentiated.bed ...

  12. File list: Pol.PSC.20.AllAg.mESCs,_differentiated [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.PSC.20.AllAg.mESCs,_differentiated mm9 RNA polymerase Pluripotent stem cell mESCs, differentia...ted SRX590276 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.PSC.20.AllAg.mESCs,_differentiated.bed ...

  13. File list: Pol.Emb.20.AllAg.Muscle_cells [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Emb.20.AllAg.Muscle_cells dm3 RNA polymerase Embryo Muscle cells SRX110760,SRX1...X110758,SRX110765,SRX110766,SRX110769 http://dbarchive.biosciencedbc.jp/kyushu-u/dm3/assembled/Pol.Emb.20.AllAg.Muscle_cells.bed ...

  14. File list: Pol.Emb.05.AllAg.Muscle_cells [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Emb.05.AllAg.Muscle_cells dm3 RNA polymerase Embryo Muscle cells SRX110762,SRX1...X110759,SRX110770,SRX110768,SRX110763 http://dbarchive.biosciencedbc.jp/kyushu-u/dm3/assembled/Pol.Emb.05.AllAg.Muscle_cells.bed ...

  15. File list: Pol.Emb.50.AllAg.Muscle_cells [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Emb.50.AllAg.Muscle_cells dm3 RNA polymerase Embryo Muscle cells SRX110760,SRX1...X110765,SRX110769,SRX110766,SRX110758 http://dbarchive.biosciencedbc.jp/kyushu-u/dm3/assembled/Pol.Emb.50.AllAg.Muscle_cells.bed ...

  16. File list: Pol.CDV.05.AllAg.Brachiocephalic_endothelial_cells [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.CDV.05.AllAg.Brachiocephalic_endothelial_cells hg19 RNA polymerase Cardiovascular Brachiocephal...ic endothelial cells http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.CDV.05.AllAg.Brachiocephalic_endothelial_cells.bed ...

  17. File list: Pol.CDV.10.AllAg.Brachiocephalic_endothelial_cells [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.CDV.10.AllAg.Brachiocephalic_endothelial_cells hg19 RNA polymerase Cardiovascular Brachiocephal...ic endothelial cells http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.CDV.10.AllAg.Brachiocephalic_endothelial_cells.bed ...

  18. File list: Pol.CDV.50.AllAg.Brachiocephalic_endothelial_cells [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.CDV.50.AllAg.Brachiocephalic_endothelial_cells hg19 RNA polymerase Cardiovascular Brachiocephal...ic endothelial cells http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.CDV.50.AllAg.Brachiocephalic_endothelial_cells.bed ...

  19. File list: Pol.Gon.10.AllAg.Testis [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Gon.10.AllAg.Testis mm9 RNA polymerase Gonad Testis SRX349391,SRX112975,SRX1437...96,SRX237511,SRX237510,SRX244355 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Gon.10.AllAg.Testis.bed ...

  20. File list: Pol.Gon.05.AllAg.Testicular_germ_cells [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Gon.05.AllAg.Testicular_germ_cells mm9 RNA polymerase Gonad Testicular germ cel...ls http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Gon.05.AllAg.Testicular_germ_cells.bed ...

  1. File list: Pol.Gon.05.AllAg.Testis [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Gon.05.AllAg.Testis mm9 RNA polymerase Gonad Testis SRX349391,SRX112975,SRX1437...96,SRX237511,SRX244355,SRX237510 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Gon.05.AllAg.Testis.bed ...

  2. File list: Pol.Gon.50.AllAg.Testicular_somatic_cells [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Gon.50.AllAg.Testicular_somatic_cells mm9 RNA polymerase Gonad Testicular somat...ic cells http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Gon.50.AllAg.Testicular_somatic_cells.bed ...

  3. File list: Pol.Gon.20.AllAg.Testis [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Gon.20.AllAg.Testis mm9 RNA polymerase Gonad Testis SRX349391,SRX112975,SRX1437...96,SRX237511,SRX237510,SRX244355 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Gon.20.AllAg.Testis.bed ...

  4. File list: Pol.Neu.10.AllAg.Neural_progenitor_cells [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Neu.10.AllAg.Neural_progenitor_cells mm9 RNA polymerase Neural Neural progenito...r cells http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Neu.10.AllAg.Neural_progenitor_cells.bed ...

  5. File list: Pol.Adp.05.AllAg.Adipose_progenitor_cells [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Adp.05.AllAg.Adipose_progenitor_cells mm9 RNA polymerase Adipocyte Adipose progeni...tor cells http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Adp.05.AllAg.Adipose_progenitor_cells.bed ...

  6. File list: Pol.Oth.50.AllAg.Multipotent_otic_progenitor [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Oth.50.AllAg.Multipotent_otic_progenitor mm9 RNA polymerase Others Multipotent otic progeni...tor SRX736457,SRX736456 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Oth.50.AllAg.Multipotent_otic_progenitor.bed ...

  7. File list: Pol.Adp.20.AllAg.Adipose_progenitor_cells [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Adp.20.AllAg.Adipose_progenitor_cells mm9 RNA polymerase Adipocyte Adipose progeni...tor cells http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Adp.20.AllAg.Adipose_progenitor_cells.bed ...

  8. File list: Pol.Oth.05.AllAg.Multipotent_otic_progenitor [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Oth.05.AllAg.Multipotent_otic_progenitor mm9 RNA polymerase Others Multipotent otic progeni...tor SRX736456,SRX736457 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Oth.05.AllAg.Multipotent_otic_progenitor.bed ...

  9. File list: Pol.Adp.50.AllAg.Adipose_progenitor_cells [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Adp.50.AllAg.Adipose_progenitor_cells mm9 RNA polymerase Adipocyte Adipose progeni...tor cells http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Adp.50.AllAg.Adipose_progenitor_cells.bed ...

  10. File list: Pol.Emb.20.AllAg.Pre-somitic_mesoderm [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Emb.20.AllAg.Pre-somitic_mesoderm mm9 RNA polymerase Embryo Pre-somitic mesoder...m http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Emb.20.AllAg.Pre-somitic_mesoderm.bed ...

  11. File list: Pol.Emb.10.AllAg.Pre-somitic_mesoderm [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Emb.10.AllAg.Pre-somitic_mesoderm mm9 RNA polymerase Embryo Pre-somitic mesoder...m http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Emb.10.AllAg.Pre-somitic_mesoderm.bed ...

  12. File list: Pol.Emb.50.AllAg.Pre-somitic_mesoderm [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Emb.50.AllAg.Pre-somitic_mesoderm mm9 RNA polymerase Embryo Pre-somitic mesoder...m http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Emb.50.AllAg.Pre-somitic_mesoderm.bed ...

  13. File list: Pol.Prs.10.AllAg.Prostate_cancer_cells [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Prs.10.AllAg.Prostate_cancer_cells hg19 RNA polymerase Prostate Prostate cancer... cells SRX022582 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Prs.10.AllAg.Prostate_cancer_cells.bed ...

  14. File list: Pol.Utr.05.AllAg.Endometrial_stromal_cells [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Utr.05.AllAg.Endometrial_stromal_cells hg19 RNA polymerase Uterus Endometrial s...tromal cells SRX1048949 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Utr.05.AllAg.Endometrial_stromal_cells.bed ...

  15. File list: Pol.Utr.50.AllAg.Endometrial_stromal_cells [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Utr.50.AllAg.Endometrial_stromal_cells hg19 RNA polymerase Uterus Endometrial s...tromal cells SRX1048949 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Utr.50.AllAg.Endometrial_stromal_cells.bed ...

  16. File list: Pol.Utr.10.AllAg.Endometrial_stromal_cells [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Utr.10.AllAg.Endometrial_stromal_cells hg19 RNA polymerase Uterus Endometrial s...tromal cells SRX1048949 http://dbarchive.biosciencedbc.jp/kyushu-u/hg19/assembled/Pol.Utr.10.AllAg.Endometrial_stromal_cells.bed ...

  17. File list: Pol.Utr.20.AllAg.Endometrial_stromal_cells [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  18. File list: Pol.Neu.05.AllAg.Brain [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Neu.05.AllAg.Brain mm9 RNA polymerase Neural Brain SRX236085,ERX132833,SRX01708...2,SRX680480,SRX020249 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Neu.05.AllAg.Brain.bed ...

  19. File list: Pol.Neu.50.AllAg.Brain [Chip-atlas[Archive

    Lifescience Database Archive (English)

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  20. File list: Pol.Neu.10.AllAg.Brain [Chip-atlas[Archive

    Lifescience Database Archive (English)

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