Negative feedback regulation of cellular antiviral signaling by RBCKl-mediated degradation of IRF3

Negative feedback regulation of cellular antiviral signaling by RBCKl-mediated degradation of IRF3

Viral infection causes host cells to produce type I interferons （IFNs）, which are critically involved in viral clearance. Previous studies have demonstrated that activation of the transcription factor interferon regulatory factor （IRF）3 is essential for virus-triggered induction of type I IFNs. Here...

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Veröffentlicht in:Cell research 2008, Vol.18 (11), p.1096-1104
1. Verfasser: Min Zhang Yang Tian Rui-Peng Wang Dong Gao Yan Zhang Fei-Ci Diao Dan-Ying Chen Zhong-HeZhai Hong-Bing Shu
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IFNs
抗滤过性病原体
蛋白质
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description Viral infection causes host cells to produce type I interferons （IFNs）, which are critically involved in viral clearance. Previous studies have demonstrated that activation of the transcription factor interferon regulatory factor （IRF）3 is essential for virus-triggered induction of type I IFNs. Here we show that the E3 ubiquitin ligase RBCC protein interacting with PKC1 （RBCK1） catalyzes the ubiquitination and degradation of IRF3. Overexpression of RBCK1 negatively regulates Sendai virus-triggered induction of type I IFNs, while knockdown of RBCK1 has the opposite effect. Plaque assays consistently demonstrate that RBCKI negatively regulates the cellular antiviral response. Furthermore, viral infection leads to induction of RBCK1 and subsequent degradation of IRF3. These findings suggest that the cellular antiviral response is controlled by a negative feedback regulatory mechanism involving RBCKl-mediated ubiquitination and degradation of IRF3.
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subjects IFNs
抗滤过性病原体
蛋白质
title Negative feedback regulation of cellular antiviral signaling by RBCKl-mediated degradation of IRF3
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