SARS-CoV-2 Omicron 变种尖端糖蛋白突变 Q954H 增强了融合核心的稳定性
Nisansala Vithanage1, Rifat Hasan Apurba1, Hamza Enesi Ozomarisi1
1Department of Chemistry, University of Missouri, Columbia, Missouri 65211, United States.
ACS chemical biology
|July 7, 2025
概括
在SARS-CoV-2尖端蛋白中Omicron变异的Q954H突变稳定了病毒融合核心. 这种结构性洞察力有助于理解病毒进化和开发新的进入抑制剂.
科学领域:
- 病毒学 病毒学
- 结构生物学 结构生物学
- 生物化学 生物化学
背景情况:
- 在全球范围内,SARS-CoV-2 Omicron 变种占主导地位,原因是其传染性增加和免疫规避.
- 奥米克朗尖尖糖蛋白具有众多突变,包括HR1域中的Q954H,影响病毒进入.
- 病毒进入涉及HR1和HR2域形成一个融合核心结构.
研究的目的:
- 调查Omicron Q954H突变对SARS-CoV-2核融合核心稳定性的影响.
- 确定通过Q954H突变调解的增强HR1-HR2相互作用的结构基础.
- 为开发SARS-CoV-2进入抑制剂提供见解.
主要方法:
- 进行X射线晶体学以确定Omicron S核聚变核心结构.
- 使用合成depsipeptides进行生物化学测试,以探测结相互作用.
- 融合核心组件稳定性的比较分析.
主要成果:
- Q954H突变显著增强了HR1-HR2域相互作用,稳定了融合核.
- 晶体结构揭示了涉及Q954H的新键,包括N··H-O和C-H··O相互作用.
- 一种破坏N1173相互作用的合成depsipeptide降低了聚变核心组件的稳定性.
结论:
- Q954H突变通过特定的键网络稳定了SARS-CoV-2 Omicron融合核心.
- 了解这些相互作用对于分析病毒演变至关重要.
- 这些发现可以为设计针对病毒进入机制的新型抑制剂提供信息.
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