Sample records for OXIDORREDUCTASAS (oxidoreductases)
from WorldWideScience.org

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1

Vitaminas y oxidorreductasas antioxidantes: defensa ante el estrés oxidativo/ Antioxidant vitamins and oxidoreductases: a defense against oxidative stress

Benítez Zequeira, Daniel Eugenio
2006-06-01

Resumen en español Se realizó una revisión que comprende aspectos morfológicos y funcionales de agentes oxidantes y antioxidantes, así como los mecanismos bioquímicos que los involucran en la defensa antioxidante del organismo. Se conoce como estrés oxidativo a los efectos morbosos debidos al desequilibrio entre la acción de agentes oxidantes sobre las células y la respuesta antioxidante de estas. Los agentes oxidantes pueden ser exógenos (fármacos y venenos) y endógenos (como la (mas) s especies reactivas del oxígeno y los peróxidos lipídicos). Por otra parte, la dotación antioxidante del organismo humano también cuenta con miembros externos e internos. Entre los primeros figuran las vitaminas antioxidantes y minerales como el hierro y el selenio, ingresados formando parte de los alimentos o como suplemento nutritivo; internamente, se encuentran hemoenzimas oxidorreductasas y metabolitos intermediarios como el glutatión. Muchos procesos patológicos como entidades nosológicas en sí, se acompañan de estrés oxidativo, expresándose en la peroxidación de biomembranas y la subsiguiente apoptosis, lo cual podría acarrear la muerte celular Resumen en inglés A review that includes morphological and functional aspects of oxidant and antioxidant agents, as well as the biochemical mechanisms involving them in the antioxidant defense of the body was made. Oxidative stress is known as the morbid effects due to the unbalance between the action of oxidant agents on the cells and the antioxidant response. Oxidant agents can be exogenous (drugs and poisons) and endogenous (like the Reactive Oxygen Species and lipid peroxides). On the (mas) other hand, the antioxidant complement of the human organism has also both external and internal members. Among the first ones there are antioxidant vitamins and minerals, such as iron and selenium, which have come into the cell as part of food or as a diet supplement. Oxidoreductase hemoenzymes and intermediary metabolites as gluthatione are internally found. Many pathological processes as nosological entities per se are accompanied with oxidative stress and are expressed in the peroxidation of biomembranes and in the subsequent apoptosis, which may lead to cellular death.

Scientific Electronic Library Online (Spanish)

3

PsTRXh1 and PsTRXh2 Are Both Pea h-Type Thioredoxins with Antagonistic Behavior in Redox Imbalances

Traverso, José A.; Vignols, Florence; Cazalis, Roland; Pulido, Amada; Sahrawy, Mariam; Cejudo, Francisco Javier

DRIVER (Spanish)

4

PsTRXh1 and PsTRXh2 Are Both Pea h-Type Thioredoxins with Antagonistic Behavior in Redox Imbalances

Traverso, José A.; Vignols, Florence; Cazalis, Roland; Pulido, Amada; Sahrawy, Mariam; Cejudo, Francisco Javier; Meyer, Yves; Chueca, Ana
2007-01-01

Digital.CSIC (Spain)

5

Plant type mediates rhizospheric microbial activities and soil aggregation in a semiarid Mediterranean salt marsh

Caravaca Ballester, María Fuensanta; Alguacil García, María del Mar; Roldán Garrigos, Antonio; Torres Martínez, María Pilar
2005-02-01

Digital.CSIC (Spain)

6

Overproduction in Escherichia coli and Characterization of a Soybean Ferric Leghemoglobin Reductase

Ji, L.; Becana Ausejo, Manuel; Sarath, G.; Shearman, L.; Klucas, R. V.
1994-09-01

Digital.CSIC (Spain)

7

New oxidase from Bjerkandera arthroconidial anamorph that oxidizes both phenolic and nonphenolic benzyl alcohols

Romero, Elvira; Ferreira, Patricia; Martínez Ferrer, Ángel Tomás; Martínez Hernández, María Jesús
2008-12-06

Digital.CSIC (Spain)

9

Molecular Cloning, Functional Characterization, and Subcellular Localization of Soybean Nodule Dihydrolipoamide Reductase

Morán, José F.; Sun, Z. H.; Sarath, G.; Arredondo-Peter, R.; James, E. K.; Becana Ausejo, Manuel; Klucas, R. V.
2002-01-01

Digital.CSIC (Spain)

10

Mobilization of xanthine oxidase from the gastrointestinal tract in acute pancreatitis

Granell, Susana; Bulbena, Oriol; Genesca, Meritxell; Sastre, Juan; Gelpí, Emili; Closa, Daniel
2004-01-19

Digital.CSIC (Spain)

11

Microbiological activity in a soil 15 years after its devegetation

Bastida, F.; Moreno, J. L.; Hernández Fernández Muñoz, María Teresa; García Izquierdo, Carlos
2006-08-01

Digital.CSIC (Spain)

12

Microbial processes in the rhizosphere soil of a heavy metals-contaminated Mediterranean salt marsh: A facilitating role of AM fungi

Carrasco Blázquez, Lucía; Caravaca Ballester, María Fuensanta; Álvarez-Rogel, José; Roldán Garrigos, Antonio
2006-06-01

Digital.CSIC (Spain)

14

Evolving thermostability in mutant libraries of ligninolytic oxidoreductases expressed in yeast

García Ruiz, Eva; Maté, Diana; Ballesteros Olmo, Antonio; Martínez Ferrer, Ángel Tomás; Alcalde Galeote, Miguel
2010-03-18

Digital.CSIC (Spain)

15

Enzymatic delignification of plant cell wall: from nature to mill

Martínez Ferrer, Ángel Tomás; Ruiz-Dueñas, Francisco J.; Martínez Hernández, María Jesús; Río Andrade, José Carlos del; Gutiérrez Suárez, Ana
2009-01-01

Digital.CSIC (Spain)

17

Effects of an onion by-product on bioactivity and safety markers in healthy rats

Roldán-Marín, Eduvigis; Cano, M. Pilar; Sánchez-Moreno, Concepción; Dragsted, Lars O.
2009-01-01

Digital.CSIC (Spain)

18

Effect of plant cover decline on chemical and microbiological parameters under Mediterranean climate

García Izquierdo, Carlos; Hernández Fernández Muñoz, María Teresa; Roldán Garrigos, Antonio; Martín Ramos, Amalia
2002-05-01

Digital.CSIC (Spain)

19

Effect of long-term conservation tillage on soil biochemical properties in Mediterranean Spanish areas

Madejón, Engracia; Murillo Carpio, José Manuel; Moreno, F.; López Sánchez, María Victoria; Arrúe Ugarte, José Luis; Álvaro-Fuentes, Jorge; Cantero-Martínez, Carlos
2009-09-01

Digital.CSIC (Spain)

20

Complex formation between ferredoxin-Nadp+-oxidoreductase and Flavodoxin

Gómez-Moreno, Carlos; Sancho, Javier; Fillat, M.; Pueyo, José J.; Edmondson, Dale E.
1987-06-07

Digital.CSIC (Spain)

22

Caracterización metabólica de Diplodon chilensis (Gray, 1828) (Bivalvia: Hyriidae) expuesto a anoxia experimental/ Metabolic characterization of Diplodon chilensis (Gray, 1828) (Bivalvia: Hyriidae) exposed to experimental anoxia

Grandón, Maritza A; Barros, Javier A; González, Rodrigo R
2008-12-01

Resumen en español Diplodon chilensis es un bivalvo dulceacuícola que habita desde el norte de Chile hasta Tierra del Fuego, posee una alta capacidad de filtración y gran tolerancia a ambientes hipóxicos. Por esta razón, el objetivo de este estudio fue caracterizar por primera vez el metabolismo anaeróbico de D. chilensis a través de la actividad enzimática de las piruvato oxidoreductasas y malato dehidrogenasa analizadas en dos grupos de organismos. El primer grupo (G1) correspondi� (mas) � a organismos analizados inmediatamente después de su recolección desde el lago Lleu-Lleu (36ºS) y el segundo grupo (G2) correspondió a organismos expuestos a condiciones experimentales extremas de anoxia. Se determinó la actividad enzimática involucrada en el catabolismo anaeróbico en cinco tejidos (músculo abductor, pie, branquias, hepatopáncreas y manto-gónada). Se detectó actividad positiva para las piruvato oxido reductasas (PORs: lactato dehidrogenasa (LDH), octopina dehidrogenasa (OPDH), strombina dehidrogenasa (STRDH), alanopina dehidrogenasa (ALPDH)) y malato dehidrogenasa (MDH). MDH mostró la mayor actividad dehidrogenasa observada en todos los tejidos en los dos grupos analizados. No obstante, solo en los organismos del grupo G2 se observó una correlación significativa entre las actividades de MDH y LDH, así como un mayor valor para la razón MDH/LDH. Todas estas características enzimáticas determinadas en D. chilensis corresponden a una especie con un metabolismo anaeróbico que le permite enfrentar exitosamente condiciones anóxicas extremas Resumen en inglés Diplodon chilensis is a freshwater bivalve inhabiting from northern Chile to Tierra del Fuego. This species has a high filtration capacity and great tolerance to hypoxic environments. Thus, the aim of this study was to characterize, for the first time, anaerobic metabolism of D. chilensis using an enzymatic approach by measuring piruvate oxidoreductases and malate dehydrogenase activities in two groups of organisms. A first group (G1) corresponded to organisms analyzed im (mas) mediately after their collection from Lleu-Lleu Lake (36ºS). The second group (G2) corresponded to organisms analyzed after exposition to extreme anoxic conditions in laboratory. Enzymatic activities were measured in abductor muscle, foot, gills, hepatopancreas gland, and mantle-gonad tissue. Positive activities were detected for piruvate oxidoreductases (PORs: lactate dehydrogenase (LDH), octopine dehydrogenase (OPDH), strombine dehydrogenase (STRDH), alanopine dehydrogenase (ALPDH)) and malate dehydrogenase (MDH). MDH showed the highest dehydrogenase activity observed in all tissue and groups analyzed. Nevertheless, only those organisms exposed to extreme anoxic conditions showed significant relationships between MDH and LDH activities and a high ratio of (MDH/LDH) between them. All these enzymatic features of D. chilensis correspond to a species with a successfully anaerobic metabolism to cope with extreme anaerobic conditions

Scientific Electronic Library Online (Spanish)

23

Biodegradation of lignocellulosics: microbial, chemical, and enzymatic aspects of the fungal attack of lignin | Biodegradación de la lignocelulosa: aspectos microbiológicos, químicos y enzimáticos del ataque fúngico a la lignina

Martínez Ferrer, Ángel Tomás; Speranza, Mariela; Ruiz-Dueñas, Francisco J.; Ferreira, Patricia; Camarero, Susana

Wood is the main renewable material on Earth and is largely used as building material and in paper-pulp manufacturing. This review describes the composition of lignocellulosic materials, the different processes by which fungi are able to alter wood, including decay patterns caused by white, brown, a...

DRIVER (Spanish)

24

Biodegradation of lignocellulosics: microbial, chemical, and enzymatic aspects of the fungal attack of lignin

Martínez Ferrer, Ángel Tomás; Speranza, Mariela; Ruiz-Dueñas, Francisco J.; Ferreira, Patricia; Camarero Fernández, Susana; Guillén, Francisco; Martínez Hernández, María Jesús; Gutiérrez Suárez, Ana; Río Andrade, José Carlos del
2005-09-01

Digital.CSIC (Spain)

25

ACRATA: a novel electron transfer domain associated to apoptosis and cancer

Sánchez-Pulido, Luis; Rojas, Ana Mª.; Valencia, Alfonso; Martínez-Alonso, Carlos; Andrade, Miguel A.
2004-12-19

Digital.CSIC (Spain)

26

A new family of enzymes catalyzing the first committed step of the methylerythritol 4-phosphate (MEP) pathway for isoprenoid biosynthesis in bacteria

Sangari, Félix J.; Pérez Gil, Jordi; Carretero Paulet, Lorenzo; García Lobo, Juan María; Rodríguez Concepción, Manuel
2010-07-26

Digital.CSIC (Spain)

27

2-D DIGE analysis of Senegalese sole (Solea senegalensis) testis proteome in wild-caught and hormone-treated F1 fish

Forné, Ignasi; Agulleiro, María J.; Asensio, Esther; Abián, Joaquín; Cerdà, Joan
2009-04-01

Digital.CSIC (Spain)