ISG15-dependent activation of the sensor MDA5 is antagonized by the SARS-CoV-2 papain-like protease to evade host innate immunity.
ISG15-dependent activation of the sensor MDA5 is antagonized by the SARS-CoV-2 papain-like protease to evade host innate immunity.
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DOI:
10.1038/s41564-021-00884-1
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发表时间:
2021-04
影响因子:
28.3
通讯作者:
Gack MU
中科院分区:
文献类型:
--
作者:
Liu G;Lee JH;Parker ZM;Acharya D;Chiang JJ;van Gent M;Riedl W;Davis-Gardner ME;Wies E;Chiang C;Gack MU
Activation of the RIG-I-like receptors, RIG-I and MDA5, establishes an antiviral state by upregulating interferon (IFN)-stimulated genes (ISGs). Among these is ISG15 whose mechanistic roles in innate immunity still remain enigmatic. Here we report that ISG15 conjugation is essential for antiviral IFN responses mediated by the viral RNA sensor MDA5. ISGylation of the caspase activation and recruitment domains (CARD) of MDA5 promotes its oligomerization and thereby triggers activation of innate immunity against a range of viruses including coronaviruses, flaviviruses and picornaviruses. The ISG15-dependent activation of MDA5 is antagonized through direct de-ISGylation mediated by the papain-like protease (PLpro) of SARS-CoV-2, a recently emerged coronavirus that causes the COVID-19 pandemic. Our work demonstrates a crucial role for ISG15 in the MDA5-mediated antiviral response, and also identifies a key immune evasion mechanism of SARS-CoV-2, which may be targeted for the development of new antivirals and vaccines to combat COVID-19.
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影响因子:
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作者:
Chiang JJ;Sparrer KMJ;van Gent M;Lässig C;Huang T;Osterrieder N;Hopfner KP;Gack MU
通讯作者:
Gack MU
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