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Cyclin T1/CDK9 Interacts With Influenza A Virus Polymerase and Facilitates Its Association With Cellular RNA Polymerase II

Cyclin T1/CDK9 Interacts With Influenza A Virus Polymerase and Facilitates Its Association With Cellular RNA Polymerase II

Junjie Zhang, Gang Li, Xin Ye

J Virol. 2010 Dec;84(24):12619-27.

PMID: 20943989

Abstract:

Influenza virus RNA-dependent RNA polymerase scavenges the 5' cap from host pre-mRNA to prime viral transcription initiation. It is also well established that viral RNA-dependent RNA polymerase (vRNP) associates with cellular RNA polymerase II (Pol II), on which viral replication depends. Here we report that cyclin T1/CDK9 can interact with influenza virus polymerase and facilitate its association with cellular Pol II. The immunodepletion of cyclin T1/CDK9 totally abolished the association of vRNP with the C-terminal domain (CTD) Ser-2-phosphorylated form of RNA polymerase II. Further studies showed that overexpression of cyclin T1/CDK9 increased the transcription activity of vRNP, while knockdown of cyclin T1/CDK9 impaired viral replication. Our results suggest that cyclin T1/CDK9 serves as an adapter to mediate the interaction of vRNP and RNA Pol II and promote viral transcription.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP140651189-B	Cdk9 Inhibitor II - CAS 140651-18-9		140651-18-9	Price

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