切割与未切割:furin切割如何重塑SARS-CoV-2尖峰的结构格局
Natesan Mani1, Raghavendran Suresh1, Srirupa Chakraborty1,2,3
1Department of Chemical Engineering, Northeastern University, Boston, Massachusetts, USA.
Protein science : a publication of the Protein Society
|November 14, 2025
概括
SARS-CoV-2尖端蛋白 (S) 的furin裂变通过改变蛋白质动态和结构状态来增强受体结合. 了解这种裂变对于有效的疫苗和治疗开发至关重要.
科学领域:
- 病毒学 病毒学
- 结构生物学 结构生物学
- 免疫学 免疫学 免疫学
背景情况:
- SARS-CoV-2 尖端蛋白 (S) 是疫苗和治疗的关键目标.
- 诸如林突变 (2P) 和林裂解部位 (FCS) 缺失等修改增强了S蛋白的稳定性.
- 原生素分裂对未结合的S蛋白的功能影响尚不清楚.
研究的目的:
- 为了研究分离和未分离的SARS-CoV-2尖端蛋白之间的结构和动态差异,在它们的前输液中,未结合状态.
- 阐明氨酸裂变在S蛋白全性通信和受体结合中的作用.
- 评估素裂变对疫苗和治疗设计的影响.
主要方法:
- 广泛的全原子分子动力学模拟.
- 蛋白质动态的主要成分分析 (PCA).
- 对全沟通,形状景观和糖甘聚类的分析.
主要成果:
- 素分裂显著改变了全沟通,增加了受体结合域 (RBD) 和N端域 (NTD) 中的相关运动.
- 裂开和未裂开的S蛋白呈现出不同的构造格局,裂开的形式更快达到稳定状态.
- 裂变原始化S2子单元并影响RBD定向,表明免疫逃避和受体可访问性之间的平衡.
结论:
- 素分裂在尖端蛋白的动力学中起着功能性作用,可能增强ACE2受体结合.
- 在免疫原设计中删除FCS可能会对S蛋白功能产生意想不到的后果.
- 考虑到本地分裂状态对于开发有效的SARS-CoV-2疫苗和治疗方法至关重要.
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