SARS-CoV-2 nsp12 attenuates type I interferon production by inhibiting IRF3 nuclear translocation.
SARS-CoV-2 nsp12 attenuates type I interferon production by inhibiting IRF3 nuclear translocation.
复制标题
SARS-CoV-2 nsp12 通过抑制 IRF3 核转位来减弱 I 型干扰素的产生
DOI:
10.1038/s41423-020-00619-y
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发表时间:
2021-04
影响因子:
24.1
通讯作者:
Wang J
中科院分区:
文献类型:
--
作者:
Wang W;Zhou Z;Xiao X;Tian Z;Dong X;Wang C;Li L;Ren L;Lei X;Xiang Z;Wang J
SARS-CoV-2 is the pathogenic agent of COVID-19, which has evolved into a global pandemic. Compared with some other respiratory RNA viruses, SARS-CoV-2 is a poor inducer of type I interferon (IFN). Here, we report that SARS-CoV-2 nsp12, the viral RNA-dependent RNA polymerase (RdRp), suppresses host antiviral responses. SARS-CoV-2 nsp12 attenuated Sendai virus (SeV)- or poly(I:C)-induced IFN-β promoter activation in a dose-dependent manner. It also inhibited IFN promoter activation triggered by RIG-I, MDA5, MAVS, and IRF3 overexpression. Nsp12 did not impair IRF3 phosphorylation but suppressed the nuclear translocation of IRF3. Mutational analyses suggested that this suppression was not dependent on the polymerase activity of nsp12. Given these findings, our study reveals that SARS-CoV-2 RdRp can antagonize host antiviral innate immunity and thus provides insights into viral pathogenesis.
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