Flexibility of GroES Mobile Loop Is Required for Efficient Chaperonin Function

Chaperonin GroEL and its partner GroES assist the folding of nascent and stress-damaged proteins in an ATP-dependent manner. Free GroES has a flexible “mobile loop” and binds to GroEL through the residues at the tip of the loop, capping the central cavity of GroEL to provide the substrate polypeptid...

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