7TP3 image
Entry Detail
PDB ID:
7TP3
Keywords:
Title:
Crystal structure of SARS-CoV-2 receptor binding domain in complex with neutralizing antibody K288.2
Biological Source:
PDB Version:
Deposition Date:
2022-01-24
Release Date:
2022-02-23
Method Details:
Experimental Method:
Resolution:
2.33 Å
R-Value Free:
0.23
R-Value Work:
0.18
R-Value Observed:
0.18
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:K288.2 heavy chain
Chain IDs:B (auth: H)
Chain Length:231
Number of Molecules:1
Biological Source:Macaca mulatta
Polymer Type:polypeptide(L)
Description:K288.2 light chain
Chain IDs:C (auth: L)
Chain Length:215
Number of Molecules:1
Biological Source:Macaca mulatta
Polymer Type:polypeptide(L)
Description:Spike protein S1
Chain IDs:A (auth: Z)
Chain Length:231
Number of Molecules:1
Biological Source:Severe acute respiratory syndrome coronavirus 2
Ligand Molecules
Primary Citation

Abstact

To prepare for future coronavirus (CoV) pandemics, it is desirable to generate vaccines capable of eliciting broadly neutralizing antibody responses to CoVs. Here, we show that immunization of macaques with SARS-CoV-2 spike (S) protein with a two-shot protocol generated potent serum receptor binding domain cross-neutralizing antibody responses to both SARS-CoV-2 and SARS-CoV-1. Furthermore, responses were equally effective against most SARS-CoV-2 variants of concern (VOCs) and some were highly effective against Omicron. This result contrasts with human infection or many two-shot vaccination protocols where responses were typically more SARS-CoV-2 specific and where VOCs were less well neutralized. Structural studies showed that cloned macaque neutralizing antibodies, particularly using a given heavy chain germline gene, recognized a relatively conserved region proximal to the angiotensin converting enzyme 2 receptor binding site (RBS), whereas many frequently elicited human neutralizing antibodies targeted more variable epitopes overlapping the RBS. B cell repertoire differences between humans and macaques appeared to influence the vaccine response. The macaque neutralizing antibodies identified a pan-SARS-related virus epitope region less well targeted by human antibodies that could be exploited in rational vaccine design.

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