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- W2063764327 abstract "The Vpr protein of human immunodeficiency virus type 1 (HIV-1) plays an important role in viral replication. It has been reported that Vpr stimulates the nuclear factor-κB (NF-κB) and activator protein 1 (AP-1) signaling pathways, and thereby regulates viral and host cell gene expression. However, the molecular mechanism behind this function of Vpr is not fully understood.Here, we have identified transforming growth factor-β-activated kinase 1 (TAK1) as the important upstream signaling molecule that Vpr associates with in order to activate NF-κB and AP-1 signaling. HIV-1 virion-associated Vpr is able to stimulate phosphorylation of TAK1. This activity of Vpr depends on its association with TAK1, since the S79A Vpr mutant lost interaction with TAK1 and was unable to activate TAK1. This association allows Vpr to promote the interaction of TAB3 with TAK1 and increase the polyubiquitination of TAK1, which renders TAK1 phosphorylation. In further support of the key role of TAK1 in this function of Vpr, knockdown of endogenous TAK1 significantly attenuated the ability of Vpr to activate NF-κB and AP-1 as well as the ability to stimulate HIV-1 LTR promoter.HIV-1 Vpr enhances the phosphorylation and polyubiquitination of TAK1, and as a result, activates NF-κB and AP-1 signaling pathways and stimulates HIV-1 LTR promoter." @default.
- W2063764327 created "2016-06-24" @default.
- W2063764327 creator A5023867715 @default.
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- W2063764327 date "2014-06-09" @default.
- W2063764327 modified "2023-09-25" @default.
- W2063764327 title "HIV-1 Vpr stimulates NF-κB and AP-1 signaling by activating TAK1" @default.
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- W2063764327 doi "https://doi.org/10.1186/1742-4690-11-45" @default.
- W2063764327 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4057933" @default.
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- W2063764327 hasPublicationYear "2014" @default.
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