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The active form of the norovirus RNA-dependent RNA polymerase is a homodimer with cooperative activity
Stockholm University, Faculty of Science, Department of Biochemistry and Biophysics.
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2009 (English)In: Journal of General Virology, ISSN 0022-1317, E-ISSN 1465-2099, Vol. 90, no Pt 2, 281-91 p.Article in journal (Refereed) Published
Abstract [en]

Norovirus (NV) is a leading cause of gastroenteritis worldwide and a major public health concern. So far, the replication strategy of NV remains poorly understood, mainly because of the lack of a cell system to cultivate the virus. In this study, the function and the structure of a key viral enzyme of replication, the RNA-dependent RNA polymerase (RdRp, NS7), was examined. The overall structure of the NV NS7 RdRp was determined by X-ray crystallography to a 2.3 A (0.23 nm) resolution (PDB ID 2B43), displaying a right-hand fold typical of the template-dependent polynucleotide polymerases. Biochemical analysis evidenced that NV NS7 RdRp is active as a homodimer, with an apparent K(d) of 0.649 microM and a positive cooperativity (Hill coefficient n(H)=1.86). Crystals of the NV NS7 homodimer displayed lattices containing dimeric arrangements with high shape complementarity statistics. This experimental data on the structure and function of the NV RdRp may set the cornerstone for the development of polymerase inhibitors to control the infection with NV, a medically relevant pathogen.

Place, publisher, year, edition, pages
2009. Vol. 90, no Pt 2, 281-91 p.
Keyword [en]
Norovirus, RdRp, NS7
National Category
Natural Sciences
Research subject
Biophysics; Biochemistry
Identifiers
URN: urn:nbn:se:su:diva-32228DOI: 10.1099/vir.0.005629-0ISI: 000263075200001PubMedID: 19141436OAI: oai:DiVA.org:su-32228DiVA: diva2:279827
Available from: 2009-12-07 Created: 2009-12-07 Last updated: 2017-12-12Bibliographically approved

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