Interaction of Human ACE2 to Membrane-Bound SARS-CoV-1 and SARS-CoV-2 S Glycoproteins.

Interaction of Human ACE2 to Membrane-Bound SARS-CoV-1 and SARS-CoV-2 S Glycoproteins.
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DOI:
10.3390/v12101104
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发表时间:
2020-09-29
期刊:
Viruses
影响因子:
--
通讯作者:
Finzi A
Finzi A
中科院分区:
其他
文献类型:
--
作者:
Anand SP;Chen Y;Prévost J;Gasser R;Beaudoin-Bussières G;Abrams CF;Pazgier M;Finzi A

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严重急性呼吸综合征病毒2型(SARS-CoV-2)是当前全球冠状病毒病2019(新冠肺炎)大流行的罪魁祸首,感染数以百万计的人,导致数十万人死亡。SARS-CoV-2的病毒进入依赖于其三聚体刺突糖蛋白的受体结合域与人血管紧张素转换酶2(ACE2)受体之间的相互作用。为了设计抗SARS-CoV-2的治疗药物,仍然需要更好地理解Spike/ACE2的相互作用。在这里,我们研究了ACE2在SARS-CoV-2和密切相关的SARS-CoV-1膜结合的S糖蛋白中的协同程度。我们证明了两个尖峰三聚体之间存在着不同的原核间构象转变。有趣的是,与SARS-CoV-1尖峰相比,SARS-CoV-2尖峰对单体可溶性ACE2结合显示出正的协同作用,后者可能有更多的结构限制。我们的发现对开发阻断SPEKE/ACE2相互作用的治疗方法具有重要意义。
Severe acute respiratory syndrome virus 2 (SARS-CoV-2) is responsible for the current global coronavirus disease 2019 (COVID-19) pandemic, infecting millions of people and causing hundreds of thousands of deaths. The viral entry of SARS-CoV-2 depends on an interaction between the receptor-binding domain of its trimeric spike glycoprotein and the human angiotensin-converting enzyme 2 (ACE2) receptor. A better understanding of the spike/ACE2 interaction is still required to design anti-SARS-CoV-2 therapeutics. Here, we investigated the degree of cooperativity of ACE2 within both the SARS-CoV-2 and the closely related SARS-CoV-1 membrane-bound S glycoproteins. We show that there exist differential inter-protomer conformational transitions between both spike trimers. Interestingly, the SARS-CoV-2 spike exhibits a positive cooperativity for monomeric soluble ACE2 binding when compared to the SARS-CoV-1 spike, which might have more structural restraints. Our findings can be of importance in the development of therapeutics that block the spike/ACE2 interaction.
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