通过线性ubiquitination规范STING活动的时空空间调节 规范抗病毒免疫力
Yong Zhang1,2,3, Yesheng Fu3, Lihua Qiang2,3
1School of Medicine, Tsinghua University, Beijing, 100084, China.
通过LUBAC和OTULIN进行的线性无化调节了干扰素基因蛋白 (STING) 信号的循环GMP-AMP合成酶 (cGAS) 刺激器. 这一过程控制了病毒感染期间的STING贩运和抗病毒免疫力.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 干扰素基因蛋白 (STING) 途径的循环GMP-AMP合成酶 (cGAS) 刺激器对于先天免疫非常重要.
- 严格调节STING信号传递对于免疫平衡至关重要.
- 对于STING的时空控制机制在很大程度上是未知的.
研究的目的:
- 为了阐明病毒感染期间STING信号的时空调节.
- 为了研究线性无所不在在STING路径调制中的作用.
- 为了确定参与STING后翻译修饰的关键酶.
主要方法:
- 研究了线性无素链组合复合体 (LUBAC) 和具有线性链接特异性 (OTULIN) 的卵巢瘤二基因酶的作用.
- 分析了从内质网膜 (ER) 到戈尔吉器官的STING贩运.
- 研究了LUBAC与COPII复合体 (Sec24b) 和OTULIN与TBK1-化STING的相互作用.
主要成果:
- 在病毒感染期间,LUBAC和OTULIN可逆地催化了STING的线性无化.
- 通过LUBAC介导的STING无处不在,通过COPII绑定促进了ER-to-Golgi的贩运.
- 奥图林二基化了STING,防止了过度的抗病毒反应.
结论:
- 一个新的线性无处不在控制机制调节了STING的时空动态.
- 这种调控机制微调STING介导的抗病毒免疫力.
- 这些发现为通过精确的STING通路控制来维持免疫平衡提供了洞察力.
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