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The affinity of four short peptides for the Escherichia coli molecular chaperone GroEL was studied in the presence of the co-chaperone GroES and nucleotides. Our data show that binding of GroES to one ring enhances the interaction of the peptides with the opposite GroEL ring, a finding that was related to the structural readjustments in GroEL following GroES binding. We further report that the GroEL/GroES...
The Escherichia coli molecular chaperone GroEL can functionally interact with non-native forms of many proteins. An inherent property of non-native proteins is the exposure of hydrophobic residues and the presence of secondary structure elements. Whether GroEL unfolds or stabilises these structural elements in protein substrates as a result of binding has been the subject of extended debate in the...
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