Frontiers in Structural Biology

Frontiers in Structural Biology

Role of Molecular Chaperones in Structural Folding, Biological Functions, and Drug Interactions of Client Proteins

The book provides an updated panorama of the functional relevance of molecular chaperones in the proper folding of client factors, protein-protein interactions, the regulation of key biological ...
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GroEL Chaperonin: Interaction with Polypeptides Lacking a Rigid Tertiary Structure

Pp. 174-189 (16)

Victor V. Marchenkov, Natalia Yu Marchenko and Gennady V. Semisotnov


Molecular chaperones and especially chaperonins are primarily known as special members of the family of heat shock proteins which participate in folding, assembly, transmembrane transport and degradation of a wide variety of cellular proteins both in prokaryotes and eukaryotes. The multifunctional character of chaperones underlies their involvement in many diseases. One of their functions is binding to polypeptides lacking a rigid tertiary structure, i.e., to those with many exposed hydrophobic amino acids. The current review is focused on interaction of polypeptides of this type with GroEL, the best-studied Escherichia coli chaperonin. The literature data on driving forces of their interaction, localization of substrate polypeptides on the GroEL surface, and the effect of GroEL ligands on its interaction with substrate polypeptides are considered. Some biotechnological applications of this event are also discussed.


Protein folding, Chaperones, GroEL chaperonin, Protein-protein interaction.


Institute of Protein Research, Russian Academy of Sciences, 4 Institutskaya St., 142290 Pushchino, Moscow Region, Russia.