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TRIM35 mediates protection against influenza infection by activating TRAF3 and degrading viral PB2 被引量:9

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摘要 Tripartite motif(TRIM)family proteins are important effectors of innate immunity against viral infections.Here we identified TRIM35 as a regulator of TRAF3 activation.Deficiency in or inhibition of TRIM35 suppressed the production of type I interferon(IFN)in response to viral infection.777m35-deficient mice were more susceptible to influenza A virus(IAV)infection than were wild-type mice.TRIM35 promoted the RIG-Imediated signaling by catalyzing Lys63-linked polyubiquitination of TRAF3 and the subsequent formation of a signaling complex with VISA and TBK1.IAV PB2 polymerase countered the innate antiviral immune response by impeding the Lys63-linked polyubiquitination and activation of TRAF3.TRIM35 mediated Lys48-linked polyubiquitination and proteasomal degradation of IAV PB2,thereby antagonizing its suppression of TRAF3 activation.Our in vitro and in vivo findings thus reveal novel roles of TRIM35,through catalyzing Lys63-or Lys48-linked polyubiquitination,in RIG-I antiviral immunity and mechanism of defense against IAV infection.
出处 《Protein & Cell》 SCIE CAS CSCD 2020年第12期894-914,共21页 蛋白质与细胞(英文版)
基金 The work was supported by the National Key Research and Development Program of China(2016YFD0500205) the National Natural Science Foundation of China(NSFC)(Grant Nos.31521005,31672582,31422054,and 31472215) the Natural Science Foundation of Heilongjiang Province(JQ2019C005) by the Central Public-Interest Scientific Institution Basal Research Fund(No.Y2017JC35).
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