人类冠状病毒229E宿主识别的分子基础
Yu-Xi Tsai1,2, Yu-Chun Chien1,2, Min-Feng Hsu1
1Institute of Biological Chemistry, Academia Sinica, Taipei, 11529, Taiwan.
Nature communications
|February 27, 2025
概括
最早的人类冠状病毒229E (HCoV-229E) 使用其尖端蛋白来结合人类氨基酶N (hAPN). 这项研究揭示了这种相互作用的结构,详细说明了病毒如何识别和感染其宿主.
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:
- 人类冠状病毒229E (HCoV-229E) 是一种负责人类感染的alphacoronavirus.
- HCoV-229E利用其尖端 (S) 蛋白,特别是受体结合域 (RBD),与人类氨基酶N (hAPN) 结合,进入宿主细胞.
研究的目的:
- 阐明HCoV-229E S蛋白与hAPN.结合的结构机制.
- 调查糖化在HCoV-229E S蛋白-hAPN相互作用和宿主识别中的作用.
- 提供糖化HCoV-229E S蛋白-hAPN复合物的原子模型.
主要方法:
- 低温电子显微镜 (cryo-EM) 用于确定 HCoV-229E S 蛋白质与二度hAPN.complex 的结构.
- 在HCoV-229E S蛋白和hAPN.上对糖化酶的定量分析.
- 开发一个完全糖化复合物的原子模型.
主要成果:
- 冷-EM结构揭示了HCoV-229E S蛋白的RBD如何与hAPN.接触.
- 鉴定了甘氨基基化模式,提供了对抗原性和宿主识别的甘氨基屏蔽效应的见解.
- 创建了一个原子模型,说明HCoV-229E S蛋白质-hAPN复合体在膜双层.
结论:
- 这项研究提供了对HCoV-229E.初始宿主识别和感染步骤的关键结构见解.
- 了解HCoV-229E与hAPN结合的结构基础对于开发抗病毒策略至关重要.
- 糖化在调节HCoV-229E及其宿主受体之间的相互作用方面发挥着重要作用.
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