Binding of 2'-amino-2'-deoxycytidine-5'-triphosphate to norovirus polymerase induces rearrangement of the active site.
Zamyatkin, D.F., Parra, F., Machin, A., Grochulski, P., Ng, K.K.(2009) J Mol Biol 390: 10-16
- PubMed: 19426741
- DOI: https://doi.org/10.1016/j.jmb.2009.04.069
- Primary Citation of Related Structures:
3H5X, 3H5Y - PubMed Abstract:
Crystal structures of a genogroup II.4 human norovirus polymerase bound to an RNA primer-template duplex and the substrate analogue 2'-amino-2'-deoxycytidine-5'-triphosphate have been determined to 1.8 A resolution. The alteration of the substrate-binding site that is required to accommodate the 2'-amino group leads to a rearrangement of the polymerase active site and a disruption of the coordination shells of the active-site metal ions. The mode of binding seen for 2'-amino-2'-deoxycytidine-5'-triphosphate suggests a novel molecular mechanism of inhibition that may be exploited for the design of inhibitors targeting viral RNA polymerases.
Organizational Affiliation:
Department of Biological Sciences and Alberta Ingenuity Centre for Carbohydrate Science, University of Calgary, Canada.