1887

Abstract

The picornavirus membrane-associated polypeptide 2C is believed to be required for viral RNA synthesis. Hepatitis A virus (HAV)- and human rhinovirus (HRV)-encoded recombinant 2C proteins have been expressed, purified and examined for their ability to interact with the terminal sequences of viral positive- and negative-strand RNAs. The results demonstrate that both the HAV- and the HRV-encoded 2C polypeptide specifically interact with the 3′-terminal sequences of the negative-strand RNA, but not with the complementary sequences at the 5′ terminus of the positive-strand RNA. This interaction was detected by both mobility gel shift and UV cross-linking assays. Furthermore, complex formation exhibited dose-dependency and competition assays confirmed specificity. These results are consistent with our previous observation using the poliovirus 2C protein. The implication of the picornavirus 2C protein binding to the 3′-terminal sequence of the negative-strand untranslated region in viral RNA synthesis is discussed.

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2001-11-01
2019-09-18
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