alexa More than folding: localized functions of cytosolic chaperones.
Bioinformatics & Systems Biology

Bioinformatics & Systems Biology

Journal of Health & Medical Informatics

Author(s): Young JC, Barral JM, Ulrich Hartl F

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Abstract Compared with other chaperone systems, heat shock proteins Hsp70 and Hsp90 interact with a larger variety of co-chaperone proteins that regulate their activity or aid in the folding of specific substrate proteins. Although many co-chaperones are soluble cytosolic proteins, co-chaperone domains are also found in modular adaptor proteins, which are often localized to intracellular membranes or elements of the cytoskeleton. These specialized co-chaperones include auxilin, cysteine string protein, Tom70, UNC-45 and homologs of Bag-1. The localized co-chaperones can harness the ATP-dependent mechanisms of Hsp70 and Hsp90 to do conformational work in diverse functional contexts, including vesicle secretion and recycling, protein transport and the regulated assembly and/or disassembly of protein complexes. Such flexibility is unique to the cytosolic Hsp70 and Hsp90 chaperone system. This article was published in Trends Biochem Sci and referenced in Journal of Health & Medical Informatics

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