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TitleIdentification of a broad sarbecovirus neutralizing antibody targeting a conserved epitope on the receptor-binding domain.
Journal, issue, pagesCell Rep, Vol. 43, Issue 1, Page 113653, Year 2024
Publish dateJan 23, 2024
AuthorsYanqun Wang / Zhaoyong Zhang / Minnan Yang / Xinyi Xiong / Qihong Yan / Lei Cao / Peilan Wei / Yuting Zhang / Lu Zhang / Kexin Lv / Jiantao Chen / Xuesong Liu / Xiaochu Zhao / Juxue Xiao / Shengnan Zhang / Airu Zhu / Mian Gan / Jingjun Zhang / Ruoxi Cai / Jianfen Zhuo / Yanjun Zhang / Haiyue Rao / Bin Qu / Yuanyuan Zhang / Lei Chen / Jun Dai / Linling Cheng / Qingtao Hu / Yaoqing Chen / Huibin Lv / Ray T Y So / Malik Peiris / Jingxian Zhao / Xiaoqing Liu / Chris Ka Pun Mok / Xiangxi Wang / Jincun Zhao /
PubMed AbstractOmicron, as the emerging variant with enhanced vaccine tolerance, has sharply disrupted most therapeutic antibodies. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) belongs to the ...Omicron, as the emerging variant with enhanced vaccine tolerance, has sharply disrupted most therapeutic antibodies. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) belongs to the subgenus Sarbecovirus, members of which share high sequence similarity. Herein, we report one sarbecovirus antibody, 5817, which has broad-spectrum neutralization capacity against SARS-CoV-2 variants of concern (VOCs) and SARS-CoV, as well as related bat and pangolin viruses. 5817 can hardly compete with six classes of receptor-binding-domain-targeted antibodies grouped by structural classifications. No obvious impairment in the potency is detected against SARS-CoV-2 Omicron and subvariants. The cryoelectron microscopy (cryo-EM) structure of neutralizing antibody 5817 in complex with Omicron spike reveals a highly conserved epitope, only existing at the receptor-binding domain (RBD) open state. Prophylactic and therapeutic administration of 5817 potently protects mice from SARS-CoV-2 Beta, Delta, Omicron, and SARS-CoV infection. This study reveals a highly conserved cryptic epitope targeted by a broad sarbecovirus neutralizing antibody, which would be beneficial to meet the potential threat of pre-emergent SARS-CoV-2 VOCs.
External linksCell Rep / PubMed:38175758
MethodsEM (single particle)
Resolution3.0 - 3.5 Å
Structure data

37240

8khc

EMDB-37240, PDB-8khc:
SARS-CoV-2 Omicron spike in complex with 5817 Fab
Method: EM (single particle) / Resolution: 3.0 Å

37241

8khd

EMDB-37241, PDB-8khd:
The interface structure of Omicron RBD binding to 5817 Fab
Method: EM (single particle) / Resolution: 3.5 Å

Chemicals

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose / N-Acetylglucosamine

ChemComp-HOH:
WATER / Water

Source
  • severe acute respiratory syndrome coronavirus 2
  • homo sapiens (human)
KeywordsVIRAL PROTEIN / SARS-CoV-2 / omicron / RBD / Fab

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