DDX56 inhibits type I interferon by disrupting assembly of IRF3-IPO5 to inhibit IRF3 nucleus import

文献类型： 外文期刊

第一作者： Li, Dan

作者： Li, Dan;Fu, Shaozu;Wu, Zhengqian;Yang, Wenping;Ru, Yi;Liu, Xiangtao;Zheng, Haixue;Li, Dan;Fu, Shaozu;Wu, Zhengqian;Yang, Wenping;Ru, Yi;Liu, Xiangtao;Zheng, Haixue;Shu, Hongbing

作者机构：

关键词： DDX56; Type I interferon; IRF3; IPO5; Nucleus import

期刊名称：JOURNAL OF CELL SCIENCE （ 影响因子：5.285； 五年影响因子：6.032 ）

ISSN： 0021-9533

年卷期： 2020 年 133 卷 5 期

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收录情况： SCI

摘要： Transcription factor IRF3-mediated type I interferon induction plays a role in antiviral innate immunity. However, mechanisms for the control and regulation of IRF3 nuclear import remain largely unknown. We have identified DEAD box polypeptide 56 (DDX56) as a negative regulator of virus-triggered IFN-beta induction. Overexpression of DDX56 suppressed nuclear translocation of IRF3 via disrupting the IRF3-IOP5 interaction, whereas knockdown or knockout of DDX56 had the opposite effect. In addition, the interaction between DDX56 and IRF3 increased during viral infection. We further found that the D166 site of DDX56 was essential for inhibiting IRF3 import into the nucleus. Our findings suggest that DDX56 regulates antiviral innate immunity by inhibiting the nuclear translocation of IRF3, revealing a novel mechanism of the DDX56-mediated innate antiviral response. This article has an associated First Person interview with the first author of the paper.

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