Abstract
Understanding mechanisms of protective antibody recognition can inform vaccine and therapeutic strategies against SARS-CoV-2. We report a monoclonal antibody, 910-30, targeting the SARS-CoV-2 receptor-binding site for ACE2 as a member of a public antibody response encoded by IGHV3-53/IGHV3-66 genes. Sequence and structural analyses of 910-30 and related antibodies explore how class recognition features correlate with SARS-CoV-2 neutralization. Cryo-EM structures of 910-30 bound to the SARS-CoV-2 spike trimer reveal binding interactions and its ability to disassemble spike. Despite heavy-chain sequence similarity, biophysical analyses of IGHV3-53/3-66-encoded antibodies highlight the importance of native heavy:light pairings for ACE2-binding competition and SARS-CoV-2 neutralization. We develop paired heavy:light class sequence signatures and determine antibody precursor prevalence to be ∼1 in 44,000 human B cells, consistent with public antibody identification in several convalescent COVID-19 patients. These class signatures reveal genetic, structural, and functional immune features that are helpful in accelerating antibody-based medical interventions for SARS-CoV-2.
Original language | English |
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Article number | 109771 |
Journal | Cell Reports |
Volume | 37 |
Issue number | 1 |
DOIs | |
Publication status | Published - Oct 5 2021 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2021 The Author(s)
ASJC Scopus Subject Areas
- General Biochemistry,Genetics and Molecular Biology
Keywords
- B-cell
- SARS-CoV-2
- biotechnology
- immunity
- neutralization
- public antibody
- virology
- yeast display