尖峰不稳定减弱了Mink集群5的SARS-CoV-2病毒
Julia N Faraone1,2,3, Pei Li1,2, Junping Hong1,2
1Center for Retrovirus Research, The Ohio State University, Columbus, OH 43210.
概括
SARS-CoV-2的明克集群5 (MC5V) 变种具有不稳定的尖端蛋白,导致感染能力降低. 这种由特定突变驱动的不稳定性限制了其传播,并强调了监测动物传播病毒的必要性.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 严重急性呼吸道综合征冠状病毒2 (SARS-CoV-2) 可以感染各种动物宿主,包括子.
- 一种与子相关的变种,子群5 (MC5V),在2020年初在丹麦出现.
研究的目的:
- 调查 MC5V 变种感染力减弱和传播背后的分子机制.
- 为了确定尖端蛋白突变在MC5V适应性中的作用.
主要方法:
- 对尖蛋白稳定性和加工的分析.
- 关键突变的结构分析.
- 评估病毒感染性和融合性.
主要成果:
- MC5V尖端蛋白表现出内在的不稳定性和受损的处理.
- 一个单一的突变,S2亚单元中的I692V,与Y453F在受体结合域中的Y453F一起,对这些缺陷有显著的贡献.
- 尖端的不稳定性导致自发的S1脱落和减少纳入病毒,导致感染能力减弱.
结论:
- 尖端蛋白的不稳定性是限制SARS-CoV-2变种如MC5V的适应性和动物感染潜力的关键因素.
- 对动物性SARS-CoV-2变种和新兴病毒病原体的持续监测至关重要.
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