Pharmaceuticals 2013, 6(11), 1407-1428; doi:10.3390/ph6111407
Article

Structural Bioinformatics and Protein Docking Analysis of the Molecular Chaperone-Kinase Interactions: Towards Allosteric Inhibition of Protein Kinases by Targeting the Hsp90-Cdc37 Chaperone Machinery

1 School of Computational Sciences and Crean School of Health and Life Sciences, Schmid College of Science and Technology, Chapman University, One University Drive, Orange, CA 92866, USA 2 Department of Pharmacology, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
* Author to whom correspondence should be addressed.
Received: 29 July 2013; in revised form: 30 October 2013 / Accepted: 5 November 2013 / Published: 11 November 2013
(This article belongs to the Special Issue Allosteric Modulators)
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Abstract: A fundamental role of the Hsp90-Cdc37 chaperone system in mediating maturation of protein kinase clients and supporting kinase functional activity is essential for the integrity and viability of signaling pathways involved in cell cycle control and organism development. Despite significant advances in understanding structure and function of molecular chaperones, the molecular mechanisms and guiding principles of kinase recruitment to the chaperone system are lacking quantitative characterization. Structural and thermodynamic characterization of Hsp90-Cdc37 binding with protein kinase clients by modern experimental techniques is highly challenging, owing to a transient nature of chaperone-mediated interactions. In this work, we used experimentally-guided protein docking to probe the allosteric nature of the Hsp90-Cdc37 binding with the cyclin-dependent kinase 4 (Cdk4) kinase clients. The results of docking simulations suggest that the kinase recognition and recruitment to the chaperone system may be primarily determined by Cdc37 targeting of the N-terminal kinase lobe. The interactions of Hsp90 with the C-terminal kinase lobe may provide additional “molecular brakes” that can lock (or unlock) kinase from the system during client loading (release) stages. The results of this study support a central role of the Cdc37 chaperone in recognition and recruitment of the kinase clients. Structural analysis may have useful implications in developing strategies for allosteric inhibition of protein kinases by targeting the Hsp90-Cdc37 chaperone machinery.
Keywords: molecular chaperones; protein kinases; protein docking; protein-protein interactions; allosteric binding sites; drug discovery

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MDPI and ACS Style

Lawless, N.; Blacklock, K.; Berrigan, E.; Verkhivker, G. Structural Bioinformatics and Protein Docking Analysis of the Molecular Chaperone-Kinase Interactions: Towards Allosteric Inhibition of Protein Kinases by Targeting the Hsp90-Cdc37 Chaperone Machinery. Pharmaceuticals 2013, 6, 1407-1428.

AMA Style

Lawless N, Blacklock K, Berrigan E, Verkhivker G. Structural Bioinformatics and Protein Docking Analysis of the Molecular Chaperone-Kinase Interactions: Towards Allosteric Inhibition of Protein Kinases by Targeting the Hsp90-Cdc37 Chaperone Machinery. Pharmaceuticals. 2013; 6(11):1407-1428.

Chicago/Turabian Style

Lawless, Nathan; Blacklock, Kristin; Berrigan, Elizabeth; Verkhivker, Gennady. 2013. "Structural Bioinformatics and Protein Docking Analysis of the Molecular Chaperone-Kinase Interactions: Towards Allosteric Inhibition of Protein Kinases by Targeting the Hsp90-Cdc37 Chaperone Machinery." Pharmaceuticals 6, no. 11: 1407-1428.

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