相关实验视频
Updated: Jul 19, 2025

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In Vitro Analysis of E3 Ubiquitin Ligase Function
Published on: May 14, 2021
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装有MAVS的未定Lys63连接的多比基链激活了RIG-I-MAVS信号级联
Feng Liu1,2, Wanxin Zhuang1,2, Bin Song3
1Key Laboratory of Infection and Immunity of Shandong Province & Key Laboratory for Experimental Teratology of Ministry of Education, Shandong University, Jinan, 250012, Shandong, P.R. China.
Cellular & molecular immunology
|August 15, 2023
概括
这项研究揭示了MAVS聚合物的未定K63结合的多基化如何调节RIG-I类受体信号传递. USP10二维基因酶和Ube2N-Riplet/TRIM31结合酶复合体控制这个过程,影响病毒防御.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 病毒学 病毒学
背景情况:
- 适应蛋白MAVS聚合激活RIG-I类受体 (RLR) 信号通路,这对于抗病毒免疫至关重要.
- 与lys63 (K63) 相关的MAVS聚基化对其聚合至关重要,但涉及的特定酶仍然不清楚.
研究的目的:
- 阐明MAVS聚合的机制,重点关注K63结合的多比化作用.
- 为了识别调节MAVS无化和聚合的E3连接酶和无化酶 (DUBs).
主要方法:
- 在MAVS上研究了RIG-I和K63连接的聚比奎丁链之间的相互作用.
- 通过生物化学和细胞测定,确定了ubiquitin结合酶Ube2N,E3结合酶Riplet和TRIM31,以及DUB USP10.
- 评估了USP10缺乏对MAVS聚合,I型干扰素产生和小鼠病毒耐药性的影响.
主要成果:
- 在MAVS上,RIG-I直接识别了K63连接的多基链,并启动了聚合.
- Ube2N,Riplet和TRIM31合作促进MAVS的未定K63结合的多比基化.
- USP10二基化MAVS,减弱聚合和I型干扰素的产生;USP10缺乏的小鼠表现出对病毒感染的增强抵抗力.
结论:
- 对于RLR信号激活的一种新机制涉及MAVS聚合,其介导由未定的K63结合的多基链.
- USP10作为一个关键的DUB,而Ube2N-Riplet/TRIM31复合体作为E2:E3系统来调节MAVS在病毒感染期间的无处不在和聚合.
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