Feedback regulation of the heat shock response

Abstract

The heat shock response is triggered primarily by nonnative proteins accumulating in a stressed cell and results in increased expression of heat shock proteins (Hsps), i.e., of chaperones capable of participating in the refolding or elimination of nonnative proteins. Best known is the transcriptional part of this response that is mediated predominantly by heat shock factor 1 (HSF1). HSF1 activity is regulated at different levels by Hsps and co-chaperones and ismodulated further by a number ofmechanisms involving other stress regulated aspects of cell metabolism. © 2006 Springer-Verlag Berlin Heidelberg.