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TitleStructural basis of a two-antibody cocktail exhibiting highly potent and broadly neutralizing activities against SARS-CoV-2 variants including diverse Omicron sublineages.
Journal, issue, pagesCell Discov, Vol. 8, Issue 1, Page 87, Year 2022
Publish dateSep 8, 2022
AuthorsXiaoman Li / Yongbing Pan / Qiangling Yin / Zejun Wang / Sisi Shan / Laixing Zhang / Jinfang Yu / Yuanyuan Qu / Lina Sun / Fang Gui / Jia Lu / Zhaofei Jing / Wei Wu / Tao Huang / Xuanling Shi / Jiandong Li / Xinguo Li / Dexin Li / Shiwen Wang / Maojun Yang / Linqi Zhang / Kai Duan / Mifang Liang / Xiaoming Yang / Xinquan Wang /
PubMed AbstractThe severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants of concern (VOCs), especially the latest Omicron, have exhibited severe antibody evasion. Broadly neutralizing antibodies ...The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants of concern (VOCs), especially the latest Omicron, have exhibited severe antibody evasion. Broadly neutralizing antibodies with high potency against Omicron are urgently needed for understanding the working mechanisms and developing therapeutic agents. In this study, we characterized the previously reported F61, which was isolated from convalescent patients infected with prototype SARS-CoV-2, as a broadly neutralizing antibody against all VOCs including Omicron BA.1, BA.1.1, BA.2, BA.3 and BA.4 sublineages by utilizing antigen binding and cell infection assays. We also identified and characterized another broadly neutralizing antibody D2 with epitope distinct from that of F61. More importantly, we showed that a combination of F61 with D2 exhibited synergy in neutralization and protecting mice from SARS-CoV-2 Delta and Omicron BA.1 variants. Cryo-Electron Microscopy (Cryo-EM) structures of the spike-F61 and spike-D2 binary complexes revealed the distinct epitopes of F61 and D2 at atomic level and the structural basis for neutralization. Cryo-EM structure of the Omicron-spike-F61-D2 ternary complex provides further structural insights into the synergy between F61 and D2. These results collectively indicated F61 and F61-D2 cocktail as promising therapeutic antibodies for combating SARS-CoV-2 variants including diverse Omicron sublineages.
External linksCell Discov / PubMed:36075908 / PubMed Central
MethodsEM (single particle)
Resolution3.04 - 3.62 Å
Structure data

33307

7xmx

EMDB-33307, PDB-7xmx:
Cryo-EM structure of SARS-CoV-2 spike glycoprotein in complex with three F61 Fab
Method: EM (single particle) / Resolution: 3.62 Å

33308

7xmz

EMDB-33308, PDB-7xmz:
Cryo-EM structure of SARS-CoV-2 spike glycoprotein in complex with three D2 Fab
Method: EM (single particle) / Resolution: 3.25 Å

33434

7xst

EMDB-33434, PDB-7xst:
Cryo-EM structure of SARS-CoV-2 Omicron spike glycoprotein in complex with three F61 Fab and three D2 Fab
Method: EM (single particle) / Resolution: 3.04 Å

Chemicals

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose

Source
  • severe acute respiratory syndrome coronavirus 2
  • homo sapiens (human)
KeywordsVIRAL PROTEIN / SARS-CoV-2 / spike / antibody / Omicron spike

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