Download MendeleyNon-Nucleoside Analogue Inhibitors Bind to an Allosteric Site on HCV NS5B Polymerase: Crystal Structures and Mechanism of Inhibition
Wang, M., Ng, K.K.S., Cherney, M.M., Chan, L., Yannopoulos, C.G., Bedard, J., Morin, N., Nguyen-Ba, N., Alaoui-Ismaili, M.H., Bethell, R.C., James, M.N.G.(2003) J Biol Chem 278: 9489-9495
- PubMed: 12509436
- DOI: https://doi.org/10.1074/jbc.M209397200
- Primary Citation of Related Structures:
1NHU, 1NHV - PubMed Abstract:
X-ray crystal structures of two non-nucleoside analogue inhibitors bound to hepatitis C virus NS5B RNA-dependent RNA polymerase have been determined to 2.0 and 2.9 A resolution. These noncompetitive inhibitors bind to the same site on the protein, approximately 35 A from the active site. The common features of binding include a large hydrophobic region and two hydrogen bonds between both oxygen atoms of a carboxylate group on the inhibitor and two main chain amide nitrogen atoms of Ser(476) and Tyr(477) on NS5B. The inhibitor-binding site lies at the base of the thumb domain, near its interface with the C-terminal extension of NS5B. The location of this inhibitor-binding site suggests that the binding of these inhibitors interferes with a conformational change essential for the activity of the polymerase.
Organizational Affiliation:
Canadian Institutes for Health Research Group in Protein Structure and Function, Department of Biochemistry, University of Alberta, Edmonton, Alberta T6G 2H7, Canada.
