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Pleurotus sajor-caju HSP100 complements a thermotolerance defect in hsp104 mutant Saccharomyces cerevisiae.
J Biosci ; 2006 Jun; 31(2): 223-33
Article Dans Anglais | IMSEAR | ID: sea-110745
ABSTRACT
A putative Hsp100 gene was cloned from the fungus Pleurotus sajor-caju. mRNA expression studies demonstrated that this gene (designated PsHsp100) is highly induced by high temperature,induced less strongly by exposure to ethanol, and not induced by drought or salinity. Heat shock induction is detectable at 37 degrees C and reaches a maximum level at 42 degrees C. PsHsp100 mRNA levels sharply increased within 15 min of exposure to high temperature, and reached a maximum expression level at 2 h that was maintained for several hours. These results indicate that PsHsp100 could work at an early step in thermotolerance. To examine its function, PsHsp100 was transformed into a temperature-sensitive hsp104 deletion mutant Saccharomycetes cerivisiae strain to test the hypothesis that PsHSP100 is an protein that functions in thermotolerance. Overexpression of PsHSP100 complemented the thermotolerance defect of the hsp104 mutant yeast, allowing them being survive even at 50 degree C for 4 h. These results indicate that PsHSP100 protein is functional as an HSP100 in yeast and could play and important role in thermotolerance in P. sajor-caju.
Sujets)
Texte intégral: Disponible Indice: IMSEAR (Asie du Sud-Est) Sujet Principal: Phylogenèse / Saccharomyces cerevisiae / ARN messager / Protéines fongiques / Données de séquences moléculaires / Séquence nucléotidique / Régulation de l'expression des gènes / Alignement de séquences / Séquence d'acides aminés / Organismes génétiquement modifiés langue: Anglais Texte intégral: J Biosci Année: 2006 Type: Article

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Texte intégral: Disponible Indice: IMSEAR (Asie du Sud-Est) Sujet Principal: Phylogenèse / Saccharomyces cerevisiae / ARN messager / Protéines fongiques / Données de séquences moléculaires / Séquence nucléotidique / Régulation de l'expression des gènes / Alignement de séquences / Séquence d'acides aminés / Organismes génétiquement modifiés langue: Anglais Texte intégral: J Biosci Année: 2006 Type: Article