主体G3BP与病毒核体蛋白之间的相互作用调节了SARS-CoV-2的复制
Zemin Yang1, Bryan A Johnson2, Victoria A Meliopoulos3
1Department of Cell and Molecular Biology, St. Jude Children's Research Hospital, Memphis, TN, USA.
bioRxiv : the preprint server for biology
|July 10, 2023
概括
SARS-CoV-2 N蛋白与G3BP1之间的相互作用抑制了压力颗粒的形成,促进了病毒复制. 破坏这种相互作用可以显著降低病毒载量和疾病严重程度.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 结构生物学 结构生物学
背景情况:
- G3BP1和G3BP2是细胞压力和病毒感染期间压力颗粒形成的关键蛋白质.
- SARS-CoV-2的核体 (N) 蛋白与G3BP1/2相互作用,但功能影响尚不清楚.
研究的目的:
- 阐明SARS-CoV-2感染中G3BP1-N蛋白相互作用的功能后果.
- 确定介导G3BP1-N相互作用的特定残留物及其在病毒病原发生中的作用.
主要方法:
- 结构和生化分析,绘制G3BP1-N相互作用接口的地图.
- 结构引导的G3BP1和SARS-CoV-2N蛋白的突变发生,以破坏相互作用.
- 使用SARS-CoV-2 F17A突变体进行体内研究,以评估病毒复制和病原性.
主要成果:
- 确定了介导G3BP1-N相互作用的特定残留物.
- 在N蛋白中F17的突变选择性地取消了G3BP1的相互作用,并防止了压力颗粒的破坏.
- 具有F17A突变的SARS-CoV-2在体内显著减少了病毒复制和致病的发生.
结论:
- G3BP1-N蛋白相互作用对SARS-CoV-2的病原性至关重要.
- 这种相互作用通过使N蛋白能够抑制G3BP1介导的压力颗粒组装来促进感染.
- 针对G3BP1-N相互作用可能是针对SARS-CoV-2的治疗策略.
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