Heat shock proteins: cell protection through protein triage.
Fiche publication
Date publication
janvier 2010
Auteurs
Membres identifiés du Cancéropôle Est :
Dr GARRIDO Carmen, Pr BONNIAUD Philippe
Tous les auteurs :
Lanneau D, Wettstein G, Bonniaud P, Garrido C
Lien Pubmed
Résumé
Heat shock proteins (HSPs) are chaperones that catalyze the proper folding of nascent proteins and the refolding of denatured proteins. The ubiquitin-proteasome system is an error-checking system that directs improperly folded proteins for destruction. A coordinated interaction between the HSPs (renaturation) and the proteasome (degradation) must exist to assure protein quality control mechanisms. Although it still remains unknown how the decision of folding vs. degradation is taken, many pieces of evidence demonstrate that HSPs interact directly or indirectly with the proteasome, assuring quite selectively the proteasomal degradation of certain proteins under stress conditions. In this review, we will describe the different data that demonstrate a role for HSP90, HSP70, HSP27, and aB-crystallin in the partitioning of proteins to either one of these pathways, referred as protein triage.
Référence
ScientificWorldJournal. 2010 Aug 3;10:1543-52.