期刊
JOURNAL OF VIROLOGY
卷 75, 期 6, 页码 2646-2652出版社
AMER SOC MICROBIOLOGY
DOI: 10.1128/JVI.75.6.2646-2652.2001
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资金
- NIAID NIH HHS [1RO3AI41114, R03 AI041114-03] Funding Source: Medline
The nucleocapsid (N) protein encapsidates both viral genomic RNA (vRNA) and the antigenomic RNA (cRNA), but not viral mRNA, Previous work has shown that the N protein has preference for vRNA, and this suggested the possibility of a cis-acting signal that could be used to initiate encapsidation for the S segment, To map the cis-acting determinants, several deletion RNA derivatives and synthetic oligoribonucleotides were constructed from the S segment of the Hantaan virus (HTNV) VRNA, N protein-RNA interactions were examined by UV cross-linking studies, filter-binding assays, and gel electrophoresis mobility shift assays to define the ability of each to bind HTNV N protein. The 5' end of the S-segment vRNA was observed to be necessary and sufficient for the binding reaction. Modeling of the 5' end of the vRNA revealed a possible stem-loop structure (SL) with a large single-stranded loop. We suggest that a specific interaction occurs between the N protein and sequences within this region to initiate encapsidation of the vRNAs.
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