8HC8

SARS-CoV-2 Omicron BA.1 spike trimer (6P) in complex with YB13-292 Fab, focused refinement of Fab region

Summary for 8HC8

• Entry DOI: 10.2210/pdb8hc8/pdb
• EMDB information: 34655
• Descriptor: Spike protein S1, Heavy chain of YB13-292 Fab, Light chain of YB13-292 Fab, ... (4 entities in total)
• Functional Keywords: spike protein, rbd, antibody, fab, viral protein, viral protein-immune system complex, viral protein/immune system
• Biological source: Severe acute respiratory syndrome coronavirus 2 (2019-nCoV, SARS-CoV-2); More
• Total number of polymer chains: 3
• Total formula weight: 70813.32

Authors

Liu, B.,Gao, X.,Chen, Q.,Li, Z.,Su, M.,He, J.,Xiong, X. (deposition date: 2022-11-01, release date: 2023-01-25, Last modification date: 2024-10-16)

Primary citation

Yu, H.,Liu, B.,Zhang, Y.,Gao, X.,Wang, Q.,Xiang, H.,Peng, X.,Xie, C.,Wang, Y.,Hu, P.,Shi, J.,Shi, Q.,Zheng, P.,Feng, C.,Tang, G.,Liu, X.,Guo, L.,Lin, X.,Li, J.,Liu, C.,Huang, Y.,Yang, N.,Chen, Q.,Li, Z.,Su, M.,Yan, Q.,Pei, R.,Chen, X.,Liu, L.,Hu, F.,Liang, D.,Ke, B.,Ke, C.,Li, F.,He, J.,Wang, M.,Chen, L.,Xiong, X.,Tang, X.
Somatically hypermutated antibodies isolated from SARS-CoV-2 Delta infected patients cross-neutralize heterologous variants.
Nat Commun, 14:1058-1058, 2023

PubMed Abstract: SARS-CoV-2 Omicron variants feature highly mutated spike proteins with extraordinary abilities in evading antibodies isolated earlier in the pandemic. Investigation of memory B cells from patients primarily with breakthrough infections with the Delta variant enables isolation of a number of neutralizing antibodies cross-reactive to heterologous variants of concern (VOCs) including Omicron variants (BA.1-BA.4). Structural studies identify altered complementarity determining region (CDR) amino acids and highly unusual heavy chain CDR2 insertions respectively in two representative cross-neutralizing antibodies-YB9-258 and YB13-292. These features are putatively introduced by somatic hypermutation and they are heavily involved in epitope recognition to broaden neutralization breadth. Previously, insertions/deletions were rarely reported for antiviral antibodies except for those induced by HIV-1 chronic infections. These data provide molecular mechanisms for cross-neutralization of heterologous SARS-CoV-2 variants by antibodies isolated from Delta variant infected patients with implications for future vaccination strategy.

PubMed: 36828833
DOI: 10.1038/s41467-023-36761-0

Experimental method

ELECTRON MICROSCOPY (3.95 Å)