核酸诱导的ZCCHC3凝聚促进了广泛的先天免疫反应
Miao Shi1, Tao Jiang2, Mengfan Zhang3
1Science and Technology Innovation Center, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250000, China; National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China.
指CCHC域含有蛋白3 (ZCCHC3) 通过与核酸形成生物分子凝聚物来促进先天的抗病毒免疫力,增强RIG-I类受体和cGAS信号通路.
科学领域:
- 这是天生的免疫力.
- 分子生物学分子生物学
- 生物化学 生化学
背景情况:
- 网红酸诱导基因-I (RIG-I) 类受体 (RLR) 和循环GMP-AMP合成酶 (cGAS) 对于检测病毒核酸和启动抗病毒反应至关重要.
- 众所周知,宿主因子指CCHC域含蛋白3 (ZCCHC3) 可以积极调节RLR和cGAS信号,但潜在的机制尚不清楚.
研究的目的:
- 阐明ZCCHC3增强RLR和cGAS介导的抗病毒信号的机制.
- 研究ZCCHC3在生物分子凝聚中的作用及其对先天免疫路径的影响.
主要方法:
- 利用人类细胞系研究ZCCHC3功能.
- 采用分析核酸结合和液相凝结的技术.
- 确定ZCCHC3介导凝聚物的高分辨率结构.
- 评估了ZCCHC3突变对通路激活的影响.
主要成果:
- ZCCHC3通过一个统一的策略促进RLR和cGAS信号传输,其中包括核酸结合和液相凝结.
- ZCCHC3凝聚剂丰富并激活RLR,从而促进MAVS光纤组装.
- ZCCHC3通过促进DNA,cGAS,ATP和GTP的凝结来增强cGAS信号传递.
- 在凝结中受损的ZCCHC3突变物在两个途径中失去了它们的调节功能.
结论:
- ZCCHC3利用生物分子凝聚作为一种广泛的机制来提高先天的抗病毒免疫力.
- 这些发现揭示了生物分子凝聚和RLR和cGAS信号通路的调节之间的重要联系.
- ZCCHC3充当了一个支架,通过相位分离来促进关键信号元件的组装.
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