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The lifecycle of intracellular pathogens, especially viruses, is intimately tied to the macromolecular synthetic processes of their host cell. In the case of positive-stranded RNA viruses, the ability to translate and, thus, replicate their infecting genome is dependent upon hijacking host proteins. To identify proteins that participate in West Nile virus (WNV) replication, we tested the ability of...
West Nile virus (WNV) infections in vertebrates are generally acute but persistent infections have been observed. To investigate the ability of WNV to produce persistent infections, we forced subgenomic WNV replicons to replicate within a cell without causing cell death. Detailed analyses of these cell-adapted genomes revealed mutations within the nonstructural protein genes NS2A (D73H, M108K), NS3...
To help understand the mechanism of pathogenesis of dengue virus (DV), we set out to create an infectious cDNA of the Brazilian prototype strain of DV serotype 1 (DV1-BR/90). PCR-amplified fragments of DV1-BR/90 cDNA were readily assembled into a subgenomic cDNA that could be used to produce replicating RNAs (replicons), lacking the structural protein-encoding regions of the genome. However, assembly...
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