Characterization of SARS-CoV-2 Variants N501Y.V1 and N501Y.V2 Spike on Viral Infectivity.

Characterization of SARS-CoV-2 Variants N501Y.V1 and N501Y.V2 Spike on Viral Infectivity.
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SARS-CoV-2 变体 N501Y.V1 和 N501Y.V2 病毒感染性峰值的表征

DOI:
10.3389/fcimb.2021.720357
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发表时间:
2021
影响因子:
5.7
通讯作者:
Qin FX
Qin FX
中科院分区:
医学2区
文献类型:
--
作者:
Tang H;Gao L;Wu Z;Meng F;Zhao X;Shao Y;Shi X;Qiao S;An J;Du X;Qin FX

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冠状病毒2型(SARS-CoV-2)是2019冠状病毒病(COVID-19)的病原体,它不断进化以适应宿主并逃避抗病毒免疫。新出现的变种N501Y。V1 (B.1.1.7)和N501Y。V2 (B.1.351)分别在英国和南非首次报告,由于全球传播异常迅速而引起关注。刺突(S)蛋白的突变可能有助于这些变异的快速传播。在这里,我们用水泡性口炎病毒(VSV)为基础的假病毒系统,证明了假病毒携带N501Y。与野生型假病毒(WT)和D614G S蛋白相比,V2 S蛋白具有更高的感染效率。此外,假病毒与N501Y。V1或N501Y。与WT和D614G相比,V2 S蛋白具有更好的热稳定性,提示这些变体的突变可能增加了SARS-CoV-2 S蛋白和病毒粒子的稳定性。然而,携带N501Y的假病毒。V1或N501Y。V2 S蛋白对蛋白酶抑制剂和内吞作用的敏感性与WT和D614G相似。这些发现可能对预防病毒传播和开发针对新出现的SARS-CoV-2变体的药物有价值。
SARS-coronavirus 2 (SARS-CoV-2), pathogen of coronavirus disease 2019 (COVID-19), is constantly evolving to adapt to the host and evade antiviral immunity. The newly emerging variants N501Y.V1 (B.1.1.7) and N501Y.V2 (B.1.351), first reported in the United Kingdom and South Africa respectively, raised concerns due to the unusually rapid global spread. The mutations in spike (S) protein may contribute to the rapid spread of these variants. Here, with a vesicular stomatitis virus (VSV)-based pseudotype system, we demonstrated that the pseudovirus bearing N501Y.V2 S protein has higher infection efficiency than pseudovirus with wildtype (WT) and D614G S protein. Moreover, pseudovirus with N501Y.V1 or N501Y.V2 S protein has better thermal stability than WT and D614G, suggesting these mutations of variants may increase the stability of SARS-CoV-2 S protein and virion. However, the pseudovirus bearing N501Y.V1 or N501Y.V2 S protein has similar sensitivity to inhibitors of protease and endocytosis with WT and D614G. These findings could be of value in preventing the spread of virus and developing drugs for emerging SARS-CoV-2 variants.
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