Journal
VIROLOGY
Volume 280, Issue 1, Pages 41-51Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1006/viro.2000.0770
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Funding
- NIAID NIH HHS [AI27451] Funding Source: Medline
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The poliovirus-encoded, membrane-associated polypeptide 2C and its precursor, 2BC, is believed to be required for initiation and elongation of viral RNA synthesis. Previous studies have shown that the 2C polypeptide specifically interacts with the 3'-terminal sequence of poliovirus negative-strand RNA. This interaction is facilitated by the presence of the conserved sequence UGUUUU in the stem a within the 3'-terminal cloverleaf structure, We show that the 2C precursor. 2BC, also interacts with the 3'-terminal cloverleaf of the negative-strand RNA. We also demonstrate here that interaction of 2C/2BC with the negative strand 3'-terminal sequence not only depends on an intact stem a containing the UGUUUU sequence but is equally influenced by the presence of an intact stem b within the negative-strand cloverleaf, The results presented here suggest that the spatial configuration of stem a UGUUUU sequence with respect to an intact stem-b is crucial for 2C/2BC interaction with the 3'-terminal negative-strand cloverleaf structure. (C) 2001 Academic Press.
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