7R8M image
Entry Detail
PDB ID:
7R8M
EMDB ID:
Title:
Structure of the SARS-CoV-2 S 6P trimer in complex with neutralizing antibody C032
Biological Source:
PDB Version:
Deposition Date:
2021-06-26
Release Date:
2021-08-04
Method Details:
Experimental Method:
Resolution:
3.40 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Spike glycoprotein
Chain IDs:A, B, C
Chain Length:1271
Number of Molecules:3
Biological Source:Severe acute respiratory syndrome coronavirus 2
Polymer Type:polypeptide(L)
Description:C032 Fab Heavy Chain
Chain IDs:D, F (auth: H)
Chain Length:225
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:C032 Fab Light Chain
Chain IDs:E, G (auth: L)
Chain Length:218
Number of Molecules:2
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation

Abstact

Antibodies elicited by infection accumulate somatic mutations in germinal centers that can increase affinity for cognate antigens. We analyzed 6 independent groups of clonally related severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2) Spike receptor-binding domain (RBD)-specific antibodies from 5 individuals shortly after infection and later in convalescence to determine the impact of maturation over months. In addition to increased affinity and neutralization potency, antibody evolution changed the mutational pathways for the acquisition of viral resistance and restricted neutralization escape options. For some antibodies, maturation imposed a requirement for multiple substitutions to enable escape. For certain antibodies, affinity maturation enabled the neutralization of circulating SARS-CoV-2 variants of concern and heterologous sarbecoviruses. Antibody-antigen structures revealed that these properties resulted from substitutions that allowed additional variability at the interface with the RBD. These findings suggest that increasing antibody diversity through prolonged or repeated antigen exposure may improve protection against diversifying SARS-CoV-2 populations, and perhaps against other pandemic threat coronaviruses.

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Primary Citation of related structures