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Updated: Sep 13, 2025

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超越压力颗粒:G3BP1和G3BP2冗余地抑制SARS-CoV-2感染
Duo Xu1, Mahamaya Biswal2, Quanqing Zhang3
1Department of Microbiology and Plant Pathology, University of California-Riverside, Riverside, CA 92521, USA.
Viruses
|July 30, 2025
概括
拉斯-GTPase激活蛋白SH3域结合蛋白1/2 (G3BP1/G3BP2) 与SARS-CoV-2 N蛋白相互作用,破坏压力颗粒. 消去G3BP1/G3BP2可增强病毒复制,突出显示它们在对抗SARS-CoV-2的宿主防御中的关键作用.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 由SARS-CoV-2引起的COVID-19大流行,给全球健康和经济带来了重大挑战.
- 病毒病原包括通过病毒和宿主之间的蛋白质相互作用来逃避宿主免疫力.
- 了解这些宿主病毒相互作用对于开发有效的对策至关重要.
研究的目的:
- 为了确定涉及SARS-CoV-2病变发生的关键宿主因素.
- 阐明SARS-CoV-2与宿主蛋白之间的相互作用的分子机制.
- 研究已识别的宿主因子在病毒复制和细胞防御中的作用.
主要方法:
- 来自多项研究的蛋白质组数据比较分析.
- 通过生物化学分析确认蛋白质残留相互作用.
- 在切除特定宿主因子时对病毒复制的评估.
- 研究应力颗粒形成的动态.
主要成果:
- Ras-GTPase激活蛋白SH3域结合蛋白1/2 (G3BP1/G3BP2) 被确定为与SARS-CoV-2核体 (N) 蛋白相互作用的关键宿主因子.
- 确认了介导G3BP1/G3BP2-N蛋白相互作用的特定残留物.
- 这种相互作用被证明会破坏细胞应激颗粒的形成.
- 切除G3BP1和G3BP2都显著增强了SARS-CoV-2的复制.
结论:
- 在SARS-CoV-2感染期间,G3BP1和G3BP2是调节宿主-病毒接口的关键宿主因素.
- G3BP1/G3BP2与SARS-CoV-2 N蛋白之间的相互作用影响细胞防御机制.
- 在抗病毒防御中G3BP1和G3BP2的功能超出了压力颗粒的调节范围.
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