拉萨病毒Z蛋白质通过中断CCT2-介导的细胞骨网络形成来劫持自机械,以实现高效的运输
Yueming Yuan1,2,3, An Fang1,2,3, Mai Zhang1,3
1State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.
Autophagy
|July 15, 2024
概括
拉萨病毒矩阵蛋白 (LASV-Z) 通过与CCT2结合来破坏宿主细胞自,阻断自细胞-溶酶体融合并促进病毒复制. 突变LASV-Z的关键部位可以防止这种相互作用,并阻止类似病毒的粒子芽.
科学领域:
- 病毒学 病毒学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 拉萨病毒 (LASV) 导致致命的病毒性出血热 (VHF).
- 宏自/自在LASV复制中的作用尚未完全理解.
- 拉斯维基基基基因蛋白 (LASV-Z) 与病毒病原发生有关.
研究的目的:
- 阐明LASV-Z与宿主自相互作用的机制.
- 为了研究LASV-Z在阻断细胞内自流的作用.
- 为了确定参与CCT2相互作用和自调节的LASV-Z上的关键残留物.
主要方法:
- 通过共同免疫沉,研究了LASV-Z与CCT2 (含沙佩罗宁的T复合体) 的相互作用.
- 评估了LASV-Z对细胞骨完整性 (动氨酸,氨酸) 和自流量的影响.
- 利用位点定向突变发生来分析特定LASV-Z残留物 (Q29,Y48) 在CCT2结合和自抑制中的功能.
主要成果:
- 拉斯维-Z直接与TRiC复合物的组成部分CCT2结合,破坏了actin和tubulin的折叠.
- 通过LASV-Z破坏细胞骨,抑制了 lysosomal 酶过渡和自细胞与 lysosomes 的融合.
- 在LASV-Z上,氨酸29和氨酸48的突变显著降低了CCT2相互作用,损害了自流抑制和病毒样粒子 (VLP) 芽.
结论:
- LASV-Z通过与CCT2相互作用来劫持宿主自机械,以破坏细胞骨并阻止自流.
- 这种干扰导致自细胞积累,促进LASV病毒样粒子 (VLP) 芽和病毒复制.
- 准LASV-Z/CCT2相互作用是针对拉萨病毒的抗病毒干预的潜在策略.
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