7KZC image
Entry Detail
PDB ID:
7KZC
Keywords:
Title:
Potent SARS-CoV-2 binding and neutralization through maturation of iconic SARS-CoV-1antibodies
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2020-12-10
Release Date:
2021-02-24
Method Details:
Experimental Method:
Resolution:
2.30 Å
R-Value Free:
0.25
R-Value Work:
0.21
R-Value Observed:
0.21
Space Group:
P 41
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Fab heavy chain of m396-B10 antibody
Chain IDs:A (auth: H), C
Chain Length:221
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Fab light chain of m396-B10 antibody
Chain IDs:B (auth: L), D
Chain Length:215
Number of Molecules:2
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
Potent SARS-CoV-2 binding and neutralization through maturation of iconic SARS-CoV-1 antibodies.
Mabs 13 1922134 1922134 (?)
PMID: 34024246 DOI: 10.1080/19420862.2021.1922134

Abstact

Antibodies against coronavirus spike protein potently protect against infection and disease, but whether such protection can be extended to variant coronaviruses is unclear. This is exemplified by a set of iconic and well-characterized monoclonal antibodies developed after the 2003 SARS outbreak, including mAbs m396, CR3022, CR3014 and 80R, which potently neutralize SARS-CoV-1, but not SARS-CoV-2. Here, we explore antibody engineering strategies to change and broaden their specificity, enabling nanomolar binding and potent neutralization of SARS-CoV-2. Intriguingly, while many of the matured clones maintained specificity of the parental antibody, new specificities were also observed, which was further confirmed by X-ray crystallography and cryo-electron microscopy, indicating that a limited set of VH antibody domains can give rise to variants targeting diverse epitopes, when paired with a diverse VL repertoire. Our findings open up over 15 years of antibody development efforts against SARS-CoV-1 to the SARS-CoV-2 field and outline general principles for the maturation of antibody specificity against emerging viruses.

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Primary Citation of related structures