病毒诱导的细胞凝聚物的分子社会学支持reovirus组装和复制
Xiaoyu Liu1,2, Xian Xia1,2, Michael W Martynowycz3,4,5
1Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, CA, USA.
Nature communications
|December 5, 2024
概括
哺乳动物复原病毒 (MRV) 病毒工厂是动态凝结物. 这些结构组织宿主和病毒组件,以促进MRV基因组复制和囊组装.
科学领域:
- 细胞生物学 细胞生物学
- 病毒学 病毒学
- 结构生物学 结构生物学
背景情况:
- 病毒诱导的细胞凝聚物,或病毒工厂,是病毒复制的关键地点,但仍然不太了解.
- 哺乳动物的reovirus (MRV) 提供了一个模型系统来研究这些动态结构中的分子组织.
研究的目的:
- 为了可视化和机械地理解MRV诱导的凝聚物中的宿主和病毒因素的3D分子组织和相互作用.
- 阐明这些病毒工厂内MRV基因组复制和囊组装的动态过程.
主要方法:
- 聚焦离子束 (FIB) 的低温电子断层扫描 (cryoET) 从受MRV感染的哺乳动物细胞中研磨而产生的片.
- 细胞提取物的低温电子显微镜 (cryoEM) 以原子分辨率可视化病毒中间体.
主要成果:
- 感染后两个时间点MRV凝聚物的详细3D架构,揭示了外围的宿主核糖体和内部的病毒组件.
- 在凝聚物中识别了6种MRV组装中间体 (星核,空/含基因组的核,空/满的维龙,外粒子).
- 可视化病毒中间体的时间序列和空间重新排列,编排MRV生命周期.
结论:
- MRV凝结物表现出动态的"分子社会学",组织宿主和病毒分子以实现高效的复制.
- 凝结物中分子的短暂丰富为病毒基因组复制和囊组装提供了功能优势.
- 了解这些病毒工厂,可以了解病毒复制的基本机制.
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