Abstract
The heat shock response (HSR) is characterized by the induction of molecular chaperones following a sudden increase in temperature. In eukaryotes, the HSR comprises the set of genes controlled by the transcription factor Hsf1. The HSR is induced by defects in co-translational protein folding, ribosome biogenesis, organellar targeting of nascent proteins, and protein degradation by the ubiquitin proteasome system. Upon heat shock, these processes may be endogenous sources of polypeptide ligands that activate the HSR. Mechanistically, these ligands are thought to titrate the chaperone Hsp70 away from Hsf1, releasing Hsf1 to induce the full arsenal of cellular chaperones to restore protein homeostasis. In metazoans, this cell-autonomous feedback loop is modulated by the microenvironment and neuronal cues to enable tissue-level and organism-wide coordination.
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Thanks to A. Ali and G. Bushkin for critical reading of the manuscript. This work was supported by an Early Independence Award from the NIH (DP5 OD017941).
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Pincus, D. (2020). Regulation of Hsf1 and the Heat Shock Response. In: Mendillo, M.L., Pincus, D., Scherz-Shouval, R. (eds) HSF1 and Molecular Chaperones in Biology and Cancer. Advances in Experimental Medicine and Biology, vol 1243. Springer, Cham. https://doi.org/10.1007/978-3-030-40204-4_3
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