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Análisis Estructural de los Determinantes de la Estabilidad en Plastocianinas

Authors: Muñoz López, Francisco Jesús;

Análisis Estructural de los Determinantes de la Estabilidad en Plastocianinas

Abstract

La vida se encuentra en casi cualquier lugar de la Tierra, tanto en las grietas hidrotermales de los suelos marinos o en las aguas en ebullición de los géiseres, como en los picos de la cordillera del Himalaya o en las frías extensiones de la Antártida. Los seres vivos se pueden clasificar en función del ambiente en el que habitan y de su adaptación al mismo. Así encontramos organismos psicrófilos o termófilos, adaptados a bajas o altas temperaturas respectivamente; halófilos, en ambientes con una alta concentración salina; acidófilos o alcalífilos propios de ambientes de bajos o altos pH respectivamente; los barófilos en condiciones de alta presión, etcétera. En general, estos organismos se denominan extremófilos y han llamado la atención de numerosos científicos desde los primeros estudios llevados a cabo por Perutz y colaboradores en los años 70 (Perutz y Raidt, 1975; Perutz, 1978). Según la temperatura óptima de crecimiento (TOC), los organismos se clasifican en cuatro grupos: psicrófilos, con una TOC en el rango de -5 a 15 ºC, mesófilos con una TOC entre 15 y 45 ºC, termófilos con una TOC entre 45 y 80 ºC, y los hipertermófilos (o termófilos extremos) con una TOC superior a 80 ºC (Vieille y Zeikis, 2001; Li et al., 2005). Las proteínas originarias de organismos mesófilos se denominan proteínas mesofílicas, y termofílicas las de los organismos termófilos o hipertermófilos (Pantazaki et al., 2008). Desde el punto de vista de la biología celular, los componentes de la membrana y pequeñas moléculas protectoras juegan un papel importante en el caso de las adaptaciones a salinidad, pH o presión extremas, (Jaenicke, 1991; Yancey et al., 1982; van de Vossenberg et al., 1998). En las adaptaciones a temperaturas extremas, los componentes celulares como por ejemplo, las proteínas, deben ser termoestables (Jaenicke y Zavodszky, 1990).

Country
Spain
Related Organizations
Keywords

Biología molecular

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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