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Vreede FT, Jung TE, Brownlee GG. Model suggesting that replication of influenza virus is regulated by stabilization of replicative intermediates. J Virol. 2004 Sep;78(17):9568-72
submited by kickingbird at Aug, 23, 2004 12:20 PM from J Virol. 2004 Sep;78(17):9568-72

Model suggesting that replication of influenza virus is regulated by stabilization of replicative intermediates.

Vreede FT, Jung TE, Brownlee GG.


Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom.

The RNA-dependent RNA polymerase of influenza A virus is responsible for both transcription and replication of negative-sense viral RNA. It is thought that a "switching" mechanism regulates the transition between these activities. We demonstrate that, in the presence of preexisting viral RNA polymerase and nucleoprotein (NP), influenza A virus synthesizes both mRNA (transcription) and cRNA (replication) early in infection. We suggest that there may be no switch regulating the initiation of RNA synthesis and present a model suggesting that nascent cRNA is degraded by host cell nucleases unless it is stabilized by newly synthesized viral RNA polymerase and NP.

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