Cited by 1,599SARS-CoV-2 and COVID-19 Researchvaccines and immunoinformatics approachesMonoclonal and Polyclonal Antibodies Research

The DOI matches its Crossref record; 76 of the 77 references it cites were found in a registry or an index, and 1 are not checked yet.

SARS-CoV-2 neutralizing antibody structures inform therapeutic strategies

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Published version of a preprint

Abstract

The coronavirus disease 2019 (COVID-19) pandemic presents an urgent health crisis. Human neutralizing antibodies that target the host ACE2 receptor-binding domain (RBD) of the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) spike protein 1-5 show promise therapeutically and are being evaluated clinically 6-8. Here, to identify the structural correlates of SARS-CoV-2 neutralization, we solved eight new structures of distinct COVID-19 human neutralizing antibodies 5 in complex with the SARS-CoV-2 spike trimer or RBD. Structural comparisons allowed us to classify the antibodies into categories: (1) neutralizing antibodies encoded by the VH3-53 gene segment with short CDRH3 loops that block ACE2 and bind only to 'up' RBDs; (2) ACE2-blocking neutralizing antibodies that bind both up and 'down' RBDs and can contact adjacent RBDs; (3) neutralizing antibodies that bind outside the ACE2 site and recognize both up and down RBDs; and (4) previously described antibodies that do not block ACE2 and bind only to up RBDs 9. Class 2 contained four neutralizing antibodies with epitopes that bridged RBDs, including a VH3-53 antibody that used a long CDRH3 with a hydrophobic tip to bridge between adjacent down RBDs, thereby locking the spike into a closed conformation. Epitope and paratope mapping revealed few interactions with host-derived N-glycans and minor contributions of antibody somatic hypermutations to epitope contacts. Affinity measurements and mapping of naturally occurring and in vitro-selected spike mutants in 3D provided insight into the potential for SARS-CoV-2 to escape from antibodies elicited during infection or delivered therapeutically. These classifications and structural analyses provide rules for assigning current and future human RBD-targeting antibodies into classes, evaluating avidity effects and suggesting combinations for clinical use, and provide insight into immune responses against SARS-CoV-2.

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Metadata

Authors
Barnes, C. O., Jette, C. A., Abernathy, M. E., Dam, K.-M. A., Esswein, S. R., Gristick, H. B., Malyutin, A. G., Sharaf, N. G., Huey-Tubman, K. E., Lee, Y. E., Robbiani, D. F., Nussenzweig, M. C., West, A. P., & Bjorkman, P. J.
Affiliations
  • California Institute of Technology (US)
  • Institute for Research in Biomedicine (CH)
  • Howard Hughes Medical Institute (US)
Venue
Nature
Published
2020-10-12
Volume
588
Issue
7839
Pages
682-687
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W3092403777
Cited by
1,599
References
70
Citations by year
2026: 94 · 2025: 121 · 2024: 181 · 2023: 267 · 2022: 448 · 2021: 440 · 2020: 35
FWCI
39.08
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • PubMed Central (submittedVersion, cc-by-nc-nd)
  • CaltechAUTHORS (California Institute of Technology) (submittedVersion, cc-by-nc-nd)
  • CaltechAUTHORS (California Institute of Technology) (submittedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
  • Howard Hughes Medical Institute
  • U.S. Department of Energy (P41GM103393, DE-AC02-)
  • Burroughs Wellcome Fund
  • George Mason University
  • California Institute of Technology
  • Wellcome Trust
  • National Institutes of Health (AI138938, P01 AI138938-S1, AI150464)
  • Office of Science (P41GM103393, DE-AC02)
  • Beckman Institute, California Institute of Technology
  • National Institute of General Medical Sciences (AI150464, P41GM103393)
  • National Institute of Allergy and Infectious Diseases (P50AI150464, F30AI147579, P01AI138938)
  • Basic Energy Sciences (DE-AC02, P41GM103393)
  • Biological and Environmental Research (P41 GM103393)
  • SLAC National Accelerator Laboratory (P41GM103393)
Topics
  • Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › vaccines and immunoinformatics approaches
  • Life Sciences › Immunology and Microbiology › Immunology › Monoclonal and Polyclonal Antibodies Research
Keywords
SARS-CoV-2, COVID-19 pandemic, neutralizing antibodies, spike protein receptor-binding domain, antibody-antigen complex structure, ACE2 receptor, epitope mapping, N-glycans, somatic hypermutation, antibody escape, avidity, antibody combination therapy, spike trimer

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