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Hsp70 chaperones use ATP to remodel native protein oligomers and stable aggregates by entropic pulling

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Paolo De Los Rios, Pierre Goloubinoff
2016

Abstract

Forceful unfolding by entropic pulling is the general mechanism by which Hsp70 and Hsp110 chaperones control the oligomeric states, structures and activities of cellular proteins.

Official source

https://infoscience.epfl.ch/entities/publication/4447b782-de40-4931-a6cb-88022dfa62d2

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Related concepts (10)

Intrinsically disordered proteins

In molecular biology, an intrinsically disordered protein (IDP) is a protein that lacks a fixed or ordered three-dimensional structure, typically in the absence of its macromolecular interaction partners, such as other proteins or RNA. IDPs range from fully unstructured to partially structured and include random coil, molten globule-like aggregates, or flexible linkers in large multi-domain proteins. They are sometimes considered as a separate class of proteins along with globular, fibrous and membrane proteins.

Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, responding to stimuli, providing structure to cells and organisms, and transporting molecules from one location to another. Proteins differ from one another primarily in their sequence of amino acids, which is dictated by the nucleotide sequence of their genes, and which usually results in protein folding into a specific 3D structure that determines its activity.

Protein quaternary structure

Protein quaternary structure is the fourth (and highest) classification level of protein structure. Protein quaternary structure refers to the structure of proteins which are themselves composed of two or more smaller protein chains (also referred to as subunits). Protein quaternary structure describes the number and arrangement of multiple folded protein subunits in a multi-subunit complex. It includes organizations from simple dimers to large homooligomers and complexes with defined or variable numbers of subunits.

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