An antibody that neutralizes SARS-CoV-1 and SARS-CoV-2 by binding to a conserved spike epitope outside the receptor binding motif.
Sci Immunol
; 7(76): eabp9962, 2022 10 28.
Article
in English
| MEDLINE | ID: covidwho-1973781
ABSTRACT
The rapid evolution of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), such as the Omicron variants that are highly transmissible and immune evasive, underscores the need to develop therapeutic antibodies with broad neutralizing activities. Here, we used the LIBRA-seq technology, which identified SARS-CoV-2-specific B cells via DNA barcoding and subsequently single-cell sequenced BCRs, to identify an antibody, SW186, which could neutralize major SARS-CoV-2 variants of concern, including Beta, Delta, and Omicron, as well as SARS-CoV-1. The cryo-EM structure of SW186 bound to the receptor binding domain (RBD) of the viral spike protein showed that SW186 interacted with an epitope of the RBD that is not at the interface of its binding to the ACE2 receptor but is highly conserved among SARS coronaviruses. This epitope encompasses a glycosylation site (N343) of the viral spike protein. Administration of SW186 in mice after they were infected with SARS-CoV-2 Alpha, Beta, or Delta variants reduced the viral loads in the lung. These results demonstrated that SW186 neutralizes diverse SARS coronaviruses by binding to a conserved RBD epitope, which could serve as a target for further antibody development.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
SARS-CoV-2
/
COVID-19
Topics:
Variants
Limits:
Animals
Language:
English
Journal:
Sci Immunol
Year:
2022
Document Type:
Article
Affiliation country:
Sciimmunol.abp9962
Similar
MEDLINE
...
LILACS
LIS