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dc.contributor.authorBARAN, MARCINen
dc.contributor.authorBOURKE, NOLLAIGen
dc.contributor.authorUNTERHOLZNER, LEONIEen
dc.contributor.authorBOWIE, ANDREWen
dc.date.accessioned2011-09-20T15:17:33Z
dc.date.available2011-09-20T15:17:33Z
dc.date.issued2011en
dc.date.submitted2011en
dc.identifier.citationLeonie Unterholzner, Rebecca P. Sumner, Marcin Baran, Hongwei Ren, Daniel S. Mansur, Nollaig M. Bourke, Felix Randow, Geoffrey L. Smith, Andrew G. Bowie, Vaccinia Virus Protein C6 Is a Virulence Factor that Binds TBK-1 Adaptor Proteins and Inhibits Activation of IRF3 and IRF7, PLoS Pathogens, 7, 9, e1002247, 2011en
dc.identifier.otherYen
dc.identifier.urihttp://hdl.handle.net/2262/59555
dc.descriptionPUBLISHEDen
dc.description.abstractRecognition of viruses by pattern recognition receptors (PRRs) causes interferon-? (IFN-?) induction, a key event in the anti-viral innate immune response, and also a target of viral immune evasion. Here the vaccinia virus (VACV) protein C6 is identified as an inhibitor of PRR-induced IFN-? expression by a functional screen of select VACV open reading frames expressed individually in mammalian cells. C6 is a member of a family of Bcl-2-like poxvirus proteins, many of which have been shown to inhibit innate immune signalling pathways. PRRs activate both NF-?B and IFN regulatory factors (IRFs) to activate the IFN-? promoter induction. Data presented here show that C6 inhibits IRF3 activation and translocation into the nucleus, but does not inhibit NF-?B activation. C6 inhibits IRF3 and IRF7 activation downstream of the kinases TANK binding kinase 1 (TBK1) and I?B kinase-? (IKK?), which phosphorylate and activate these IRFs. However, C6 does not inhibit TBK1- and IKK?-independent IRF7 activation or the induction of promoters by constitutively active forms of IRF3 or IRF7, indicating that C6 acts at the level of the TBK1/IKK? complex. Consistent with this notion, C6 immunoprecipitated with the TBK1 complex scaffold proteins TANK, SINTBAD and NAP1. C6 is expressed early during infection and is present in both nucleus and cytoplasm. Mutant viruses in which the C6L gene is deleted, or mutated so that the C6 protein is not expressed, replicated normally in cell culture but were attenuated in two in vivo models of infection compared to wild type and revertant controls. Thus C6 contributes to VACV virulence and might do so via the inhibition of PRR-induced activation of IRF3 and IRF7.en
dc.language.isoenen
dc.relation.ispartofseriesPLoS Pathogensen
dc.relation.ispartofseries7en
dc.relation.ispartofseries9, e1002247en
dc.rightsYen
dc.subjectImmunologyen
dc.subjectInfectionen
dc.subjectpattern recognition receptors (PRRs)en
dc.titleVaccinia Virus Protein C6 Is a Virulence Factor that Binds TBK-1 Adaptor Proteins and Inhibits Activation of IRF3 and IRF7en
dc.typeJournal Articleen
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/laoneillen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/nbourkeen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/agbowieen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/mbaranen
dc.identifier.rssinternalid75012en
dc.subject.TCDThemeImmunology, Inflammation & Infectionen
dc.identifier.rssurihttp://dx.doi.org/10.1371/journal.ppat.1002247en


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