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Updated: May 7, 2026

Purification of Hsp104, a Protein Disaggregase
Published on: September 30, 2011
Protein rescue from aggregates by powerful molecular chaperone machines
Shannon M Doyle1, Olivier Genest, Sue Wickner
1Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, 37 Convent Drive, Bldg. 37, Room 5144, Bethesda, Maryland 20892, USA.
Abstract:
Protein quality control within the cell requires the interplay of many molecular chaperones and proteases. When this quality control system is disrupted, polypeptides follow pathways leading to misfolding, inactivity and aggregation. Among the repertoire of molecular chaperones are remarkable proteins that forcibly untangle protein aggregates, called disaggregases. Structural and biochemical studies have led to new insights into how these proteins collaborate with co-chaperones and utilize ATP to power protein disaggregation. Understanding how energy-dependent protein disaggregating machines function is universally important and clinically relevant, as protein aggregation is linked to medical conditions such as Alzheimer's disease, Parkinson's disease, amyloidosis and prion diseases.
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