The deubiquitinase CYLD is a specific checkpoint of the STING antiviral signaling pathway.

The deubiquitinase CYLD is a specific checkpoint of the STING antiviral signaling pathway.
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去泛素酶 CYLD 是 STING 抗病毒信号通路的特定检查点

DOI:
10.1371/journal.ppat.1007435
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发表时间:
2018-11
期刊:
影响因子:
6.7
通讯作者:
Wang C
Wang C
中科院分区:
医学1区
文献类型:
--
作者:
Zhang L;Wei N;Cui Y;Hong Z;Liu X;Wang Q;Li S;Liu H;Yu H;Cai Y;Wang Q;Zhu J;Meng W;Chen Z;Wang C

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干扰素基因刺激因子(STING)对胞质dna触发的先天免疫至关重要。STING被几种类型的多泛素链修饰。在这里,我们报道去泛素酶CYLD通过稳定STING蛋白来维持STING信号传导。CYLD缺乏促进了k48相关的多泛素化和STING的降解,减弱了HSV-1感染或DNA配体转染后irf3应答基因的诱导。此外,CYLD敲除小鼠比野生型(WT)小鼠更容易感染HSV-1感染。在机制上,在HSV-1刺激下,STING从内质网转移到高尔基体;CYLD与STING部分积累,并选择性地与STING上k48连接的多泛素链相互作用,特异性地从STING上去除k48连接的多泛素链,最终增强先天抗病毒应答。我们的研究揭示了CYLD是cGAS-STING信号通路中的一个新的检查点,并为泛素化对STING活性的动态调控提供了新的思路。
Stimulator of interferon genes (STING) is critical for cytosolic DNA-triggered innate immunity. STING is modified by several types of polyubiquitin chains. Here, we report that the deubiquitinase CYLD sustains STING signaling by stabilizing the STING protein. CYLD deficiency promoted the K48-linked polyubiquitination and degradation of STING, attenuating the induction of IRF3-responsive genes after HSV-1 infection or the transfection of DNA ligands. Additionally, CYLD knockout mice were more susceptible to HSV-1 infection than their wild-type (WT) littermates. Mechanistically, STING translocated from the ER to the Golgi upon HSV-1 stimulation; CYLD partially accumulated with STING and interacted selectively with K48-linked polyubiquitin chains on STING, specifically removing the K48-linked polyubiquitin chains from STING and ultimately boosting the innate antiviral response. Our study reveals that CYLD is a novel checkpoint in the cGAS-STING signaling pathway and sheds new light on the dynamic regulation of STING activity by ubiquitination.
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