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• W2104430557 endingPage "9841" @default.
• W2104430557 startingPage "9830" @default.
• W2104430557 abstract "ABSTRACT Enterovirus 71 (EV71) causes hand, foot, and mouth disease in young children and infants. Severe infection with EV71 can lead to various neurological complications or fatal diseases. However, the mechanism of EV71 pathogenesis is poorly understood. Emerging evidence suggests that EV71 modulates type I interferon (IFN) and cytokine responses. Here, we show that EV71 disables components of the TAB2 complex through the 3C protein. When expressed in mammalian cells, EV71 3C interacts with TAB2 and TAK1, which inhibits NF-κB activation. Furthermore, 3C mediates cleavage of TAB2 and its partners, which requires the protease activity. H40D or C147S substitution in the 3C active sites abolishes its activity, whereas R84Q or V154S substitution in the RNA binding domain has no effect. The 3C protein targets TAB2 at Q113-S114, TAK1 at Q360-S361, TAB1 both at Q414-G415 and Q451-S452, and TAB3 at Q173-G174 and Q343-G344. Importantly, overexpression of TAB2 inhibits EV71 replication, whereas addition of cleaved fragments has no effect. Thus, an equilibrium between the TAB2 complex and EV71 3C represents a control point of viral infection. These results suggest that TAK1/TAB1/TAB2/TAB3 cleavage mediated by EV71 may be a mechanism to interfere with inflammatory responses. IMPORTANCE The TAK1 complex plays a critical role in the activation of NF-κB and cytokine production. However, little is known about its connection to enterovirus 71 (EV71). We demonstrate that EV71 3C suppresses cytokine expression via cleavage of the TAK1 complex proteins. EV71 3C interacts with TAB2 and TAK1. Furthermore, overexpression of TAB2 inhibits EV71 replication, whereas addition of cleaved fragment has no effect. These results suggest that the interplay of EV71 and the TAK1 complex influences the outcome of viral infection." @default.
• W2104430557 created "2016-06-24" @default.
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• W2104430557 date "2014-09-01" @default.
• W2104430557 modified "2023-10-10" @default.
• W2104430557 title "Enterovirus 71 3C Inhibits Cytokine Expression through Cleavage of the TAK1/TAB1/TAB2/TAB3 Complex" @default.
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• W2104430557 doi "https://doi.org/10.1128/jvi.01425-14" @default.
• W2104430557 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4136319" @default.
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• W2104430557 hasPublicationYear "2014" @default.
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