解读鱼类EPC细胞中的RIG-I无化:位点识别和抗病毒影响
Feihong Liu1, Zhennan Ma2, Jieming Lu1
1College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518055, China.
Fish & shellfish immunology
|May 7, 2025
概括
鱼类中可诱导视网膜酸基因-I (RIG-I) 的化对于抗病毒反应至关重要. 特定的无处不在位点调节干扰素信号传递,影响病毒复制,并提供对保存免疫机制的见解.
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:
- 网红酸诱导基因-I (RIG-I) 类受体 (RLR) 是抗病毒和炎症反应的关键.
- 乌比基化是哺乳动物RIG-I激活和I型干扰素 (IFN) 信号的关键调节器.
- 在远鱼中,RLRs在进化过程中得到了保存,但RIG-I在鱼类中无处不在的作用还没有得到充分研究.
研究的目的:
- 调查远鱼RIG-I无化功能的特征.
- 识别和验证鱼类RIG-I的无处不在地点,并评估它们的进化保护.
- 阐明RIG-I无化对鱼细胞抗病毒信号传递和病毒复制的影响.
主要方法:
- 计算预测和实验验证,以确定RIG-I在Epithelioma papulosum cyprini (EPC) 细胞中的泛位.
- 生物化学分析证实K63相关的无化.
- 使用突变的RIG-I结构在EPC RIG-I淘汰细胞中的功能性表征,以评估IFN表达,ISG诱导和病毒复制.
主要成果:
- 在EPC细胞RIG-I上确定了6个无处不在的位点 (K115,K118,K145,K163,K168,K171),K163,K168和K171在哺乳动物RIG-I中保存.
- 在K115,K118和K163.3位点证实了与K63相关的无处不在.
- 在K163和K118的突变下调IFN和ISG表达,影响抗病毒信号传递. K118的无处不在显示出比K163.3更显著的调节效应.
- RIG-I-K115R突变体表现出增强的抗病毒活性,可能是由于增加了自我寡合化.
结论:
- RIG-I的多站点无处不在是远程服务中保存的,可调节的调节机制.
- 在RIG-I上,特定的无处不在位点在鱼类中激活RLR介导的抗病毒信号中起着至关重要的作用.
- 随处可见的RIG-I可以导致不同的抗病毒结果,为远程先天免疫提供了新的见解.
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