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West Nile virus (WNV) genome cyclization is mediated by two pairs of long-distance RNA/RNA interactions: the 5′CS/3′CSI (conserved sequence) and the 5′UAR/3′UAR (upstream AUG region) base pairings. Antisense peptide-conjugated phosphorodiamidate morpholino oligomers (PPMOs), designed to interfere with the 5′CS/3′CSI or 5′UAR/3′UAR base pairings, were previously shown to inhibit WNV. In this study,...
Genome cyclization is essential for flavivirus replication. We used RNases to probe the structures formed by the 5′-terminal 190 nucleotides and the 3′-terminal 111 nucleotides of the West Nile virus (WNV) genomic RNA. When analyzed individually, the two RNAs adopt stem-loop structures as predicted by the thermodynamic-folding program. However, when mixed together, the two RNAs form a duplex that...
West Nile virus (WNV) genome cyclization and replication require two pairs of long-distance RNA interactions. Besides the previously reported 5′CS/3′CSI (conserved sequence) interaction, a 5′UAR/3′UAR (upstream AUG region) interaction also contributes to genome cyclization and replication. WNVs containing mutant 5′UARs capable of forming the 5′/3′ viral RNA interaction were replicative. In contrast,...
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