ZBP1的凝结物形成协同作用于Z-NAs的识别和信号传导
Feiyan Xie1, Di Wu1, Jing Huang2
1Department of Neurology, Huashan Hospital and School of Life Sciences, State Key Laboratory of Genetic Engineering, Fudan University, 200438, Shanghai, China.
Cell death & disease
|July 9, 2024
概括
Z-DNA结合蛋白1 (ZBP1) 形成凝结物以识别Z型核酸并触发抗病毒免疫力. 这个过程涉及ZBP1二分化和RHIM域相互作用,导致对病原体进行编程细胞死亡.
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:
- Z-DNA结合蛋白1 (ZBP1) 通过其Zαβ域识别Z型核酸 (Z-NA),通过RIPK1/RIPK3和PANoptosome组装启动编程细胞死亡,以限制病原体的传播.
- 在Z-NA识别和信号传导中,ZBP1的Zαβ和RHIM域之间的精确合作尚未完全理解.
研究的目的:
- 阐明ZBP1凝结物形成促进Z-NA识别和抗病毒信号传导的机制.
- 研究ZBP1的Zαβ和RHIM域在Z-NA结合,二元化和下游免疫信号传递中的作用.
主要方法:
- 动态光散射 (DLS) 和小角度X射线散射 (SAXS) 用于分析ZBP1的二分化和凝结物形成.
- 在体外结合测试以确定ZBP1的配体偏好.
- 使用突变的ZBP1进行基于细胞的测试,以评估其在病毒感染 (HSV,IAV) 期间对亡和抗病毒免疫的影响.
主要成果:
- ZBP1 Zαβ域以度依赖的方式进行二元化,形成凝结物,增强Z-NA结合和抗病毒信号传递.
- ZBP1优先结合10-bpCGDNA和Z-RNA,促进凝结物的形成.
- ZBP1 RHIM域表现出粉样性特征,并与RIPK1交叉聚合,这对亡和抗病毒免疫至关重要.
结论:
- 对于识别病毒Z-NA和激活先天免疫反应,ZBP1凝聚物形成是必不可少的.
- ZBP1的Zαβ和RHIM域的协同作用协调Z-NA识别和下游信号传导,揭示了一个复杂的先天免疫机制.
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