Holdase

In molecular biology, holdases are a particular kind of molecular chaperones that assist the non-covalent folding of proteins in an ATP-independent manner.^[1] Examples of holdases are DnaJ and Hsp33.

Holdases bind to protein folding intermediates to prevent their aggregation but without directly refolding them. They stand in opposition to foldases, which are chaperones that use ATP to fold proteins.^[2]

See also

• Foldase
• Chaperonin
• Co-chaperone

References

1. Hoffmann, J. R. H.; Linke, K.; Graf, P. C.; Lilie, H.; Jakob, U. (2003). "Identification of a redox-regulated chaperone network". The EMBO Journal. 23 (1): 160–168. doi:10.1038/sj.emboj.7600016. PMC 1271656. PMID 14685279.
2. Graff, Adam MR de; Mosedale, David E.; Sharp, Tilly; Dill, Ken A.; Grainger, David J. (14 December 2020). "Proteostasis is adaptive: Balancing chaperone holdases against foldases". PLOS Computational Biology. 16 (12): e1008460. Bibcode:2020PLSCB..16E8460D. doi:10.1371/journal.pcbi.1008460. PMC 7769611. PMID 33315891.