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默贝科病毒尖蛋白的结构和受体结合活动揭示了人类DPP4适应的关键特征
Hang Yuan1,2, Jingjing Wang1, Yong Ma1
1State Key Laboratory of Respiratory Disease, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangdong-Hong Kong Joint Laboratory for Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China.
来自蝙蝠和松鼠的Merbecoviruses使用尖蛋白来结合人类DPP4. 结构分析揭示了这些动物传染病威胁中保存的结合特征和融合的进化.
科学领域:
- 病毒学 病毒学
- 结构生物学 结构生物学
- 动物传播疾病 动物传播疾病
背景情况:
- 来自各种动物的梅尔贝病毒存在动物传染的风险.
- 了解尖蛋白受体结合对于评估这些威胁至关重要.
研究的目的:
- 阐明了与人类DPP4结合的merbecovirus尖蛋白的结构基础.
- 为了研究梅尔贝科病毒受体利用的进化模式.
主要方法:
- 电子显微镜 (cryo-EM) 用于确定病毒RBD和S-trimers的结构.
- 结构引导的突变发生,以评估结合亲缘关系.
- 基于结构的遗传学来分析进化关系.
主要成果:
- 确定了GD-BatCoV和SE-PangolinCoV RBDs与人类DPP4.4的冷EM结构.
- 鉴定了一种保存的疏水性群作为MERS-HKU4类merbecoviruses中DPP4结合的签名.
- 在RBM区域之间展示了协同作用的相互作用,用于高亲和度结合和有限的RBM可塑性.
- 观察到hDPP4结合的梅尔贝病毒的趋同演变和ACE2结合的对应病毒的多样化.
结论:
- 梅尔贝科病毒受体结合涉及复杂的协同相互作用和保存特征.
- 结构洞察力揭示了不同受体结合的merbecoviruses的不同的进化策略.
- 调查结果有助于了解动物感染潜力,并为未来的监测工作提供信息.
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