Close relatives of MERS-CoV in bats use ACE2 as their functional receptors.

Close relatives of MERS-CoV in bats use ACE2 as their functional receptors.
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DOI:
10.1038/s41586-022-05513-3
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发表时间:
2022-12
期刊:
影响因子:
64.8
通讯作者:
Yan, Huan
Yan, Huan
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Xiong, Qing;Cao, Lei;Ma, Chengbao;Tortorici, M. Alejandra;Liu, Chen;Si, Junyu;Liu, Peng;Gu, Mengxue;Walls, Alexandra C.;Wang, Chunli;Shi, Lulu;Tong, Fei;Huang, Meiling;Li, Jing;Zhao, Chufeng;Shen, Chao;Chen, Yu;Zhao, Huabin;Lan, Ke;Corti, Davide;Veesler, David;Wang, Xiangxi;Yan, Huan

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中东呼吸综合征冠状病毒 (MERS-CoV) 和几种蝙蝠冠状病毒使用二肽基肽酶 4 (DPP4) 作为进入受体。然而,新冠状病毒(在蝙蝠中发现的已知与中东呼吸综合征冠状病毒最接近的亲属)的受体仍不清楚。在这里,使用假型病毒进入测定,我们发现 NeoCoV 及其近亲 PDF-2180 可以通过刺突 (S) 蛋白上的受体结合域 (RBD) 有效结合并使用特定的蝙蝠血管紧张素转换酶 2 (ACE2) 直向同源物,以及人类 ACE2 作为进入受体。冷冻电子显微镜分析揭示了涉及蛋白质-聚糖相互作用的 RBD-ACE2 结合界面,与其他已知的使用 ACE2 的冠状病毒不同。我们确定人 ACE2 的残基 337-342 是限制 NeoCoV 进入的分子决定因素,而含有 T510F RBD 突变的 NeoCoV S 假型病毒可有效进入表达人 ACE2 的细胞。尽管多克隆 SARS-CoV-2 抗体或 MERS-CoV RBD 特异性纳米抗体不能交叉中和 NeoCoV 或 PDF-2180,但 ACE2 特异性抗体和两种广泛中和 β 冠状病毒抗体可有效抑制这两种假型病毒。我们描述了使用 ACE2 作为进入受体的 MERS-CoV 相关病毒,强调了受体使用的混杂性和潜在的人畜共患威胁。 NeoCoV 及其近亲 PDF-2180 可以通过其刺突蛋白上的受体结合域有效结合并使用特定的蝙蝠 ACE2 直向同源物,以及(不太有利)人类 ACE2 作为进入受体。
Middle East respiratory syndrome coronavirus (MERS-CoV) and several bat coronaviruses use dipeptidyl peptidase-4 (DPP4) as an entry receptor. However, the receptor for NeoCoV—the closest known MERS-CoV relative found in bats—remains unclear. Here, using a pseudotype virus entry assay, we found that NeoCoV and its close relative, PDF-2180, can efficiently bind to and use specific bat angiotensin-converting enzyme 2 (ACE2) orthologues and, less favourably, human ACE2 as entry receptors through their receptor-binding domains (RBDs) on the spike (S) proteins. Cryo-electron microscopy analysis revealed an RBD–ACE2 binding interface involving protein–glycan interactions, distinct from those of other known ACE2-using coronaviruses. We identified residues 337–342 of human ACE2 as a molecular determinant restricting NeoCoV entry, whereas a NeoCoV S pseudotyped virus containing a T510F RBD mutation efficiently entered cells expressing human ACE2. Although polyclonal SARS-CoV-2 antibodies or MERS-CoV RBD-specific nanobodies did not cross-neutralize NeoCoV or PDF-2180, an ACE2-specific antibody and two broadly neutralizing betacoronavirus antibodies efficiently inhibited these two pseudotyped viruses. We describe MERS-CoV-related viruses that use ACE2 as an entry receptor, underscoring a promiscuity of receptor use and a potential zoonotic threat. NeoCoV and its close relative, PDF-2180, can efficiently bind to and use specific bat ACE2 orthologues and, less favourably, human ACE2 as entry receptors through their receptor-binding domains on the spike protein.
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