Cited by 371SARS-CoV-2 and COVID-19 Researchvaccines and immunoinformatics approachesMonoclonal and Polyclonal Antibodies Research

The antigenic anatomy of SARS-CoV-2 receptor binding domain

Open access
Dejnirattisai, Wanwisa, Zhou, Daming, Ginn, Helen M., Duyvesteyn, Helen M.E., Supasa, Piyada, Case, James Brett, Zhao, Yuguang, Walter, Thomas S. +45 more·2021·Cell

Abstract

Antibodies are crucial to immune protection against SARS-CoV-2, with some in emergency use as therapeutics. Here, we identify 377 human monoclonal antibodies (mAbs) recognizing the virus spike and focus mainly on 80 that bind the receptor binding domain (RBD). We devise a competition data-driven method to map RBD binding sites. We find that although antibody binding sites are widely dispersed, neutralizing antibody binding is focused, with nearly all highly inhibitory mAbs (IC 50 < 0.1 μg/mL) blocking receptor interaction, except for one that binds a unique epitope in the N-terminal domain. Many of these neutralizing mAbs use public V-genes and are close to germline. We dissect the structural basis of recognition for this large panel of antibodies through X-ray crystallography and cryoelectron microscopy of 19 Fab-antigen structures. We find novel binding modes for some potently inhibitory antibodies and demonstrate that strongly neutralizing mAbs protect, prophylactically or therapeutically, in animal models.

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Crossref · 10.1016/j.cell.2021.02.032

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  • The affinity of B.1.351 RBD for soluble ACE2 is 19-fold higher than for Victoria RBD and 2.7-fold higher than for B.1.1.7 RBD.

    “As expected, the affinity for B.1.351 RBD is high; in fact, it is 19-fold higher than for the Victoria RBD and 2.7-fold higher than for B.1.1.7 ((Dejnirattisai et al., 2021); Supasa et al., 2021).”

    From Evidence of escape of SARS-CoV-2 variant B.1.351 from natural and vaccine-induced sera (2021) · cites this paper as Dejnirattisai et al., 2021

  • For Fabs tested against B.1.351, only 4 (or 2 if engineered LC versions of 253 are removed) had KDs below 4 nM, compared with 17 against Victoria, and 7 Fabs failed to achieve near-micromolar affinity.

    “whereas for the antigen binding fragments (Fabs) tested against Victoria, 17 had KDs below 4 nM (the affinity of ACE2 for B.1.351) against B.1.351, this reduced to 4 (or 2 if the engineered light-chain [LC] versions of 253 are removed [(Dejnirattisai et al., 2021)]), with 7 Fabs failing to achieve near-micromolar affinity.”

    From Evidence of escape of SARS-CoV-2 variant B.1.351 from natural and vaccine-induced sera (2021) · cites this paper as Dejnirattisai et al., 2021

  • There was a correlation between ACE2 blocking and neutralization titers.

    “As expected, there was a correlation between ACE2 blocking and neutralization titers”

    From Reduced neutralization of SARS-CoV-2 B.1.1.7 variant by convalescent and vaccine sera (2021) · cites this paper as Dejnirattisai et al., 2021

  • B.1.1.7 showed only a 5.7-fold reduction in FRNT50 for mAb 159 (Victoria 11 ng/mL, B.1.1.7 61 ng/mL), suggesting that despite the residue 144 deletion being on the edge of the antibody footprint, the binding site has not been completely disrupted.

    “In this study, B.1.1.7 showed only a 5.7-fold reduction in the FRNT50 for mAb 159 (FRNT50 Victoria 11 ng/mL B.1.1.7 61 ng/mL) suggesting that despite the residue 144 deletion being on the edge of the footprint for this antibody (Dejnirattisai et al., 2021) the binding site has not been completely disrupted.”

    From Reduced neutralization of SARS-CoV-2 B.1.1.7 variant by convalescent and vaccine sera (2021) · cites this paper as Dejnirattisai et al., 2021

  • In the prior study, all 20 potent neutralizing antibodies (FRNT50 <0.1 μg/mL for Victoria) bound the RBD, except mAb 159, which bound the NTD.

    “In that study, neutralization titers established that all 20 potent neutralizing antibodies (FRNT50 <0.1 μg/mL for the Victoria virus) bound the RBD, with the single exception of mAb 159, which bound the NTD.”

    From Reduced neutralization of SARS-CoV-2 B.1.1.7 variant by convalescent and vaccine sera (2021) · cites this paper as Dejnirattisai et al., 2021

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Authors
Dejnirattisai, W., Zhou, D., Ginn, H. M., Duyvesteyn, H. M. E., Supasa, P., Case, J. B., Zhao, Y., Walter, T. S., Mentzer, A. J., Liu, C., Wang, B., Paesen, G. C., Slon-Campos, J., López-Camacho, C., Kafai, N. M., Bailey, A. L., Chen, R. E., Ying, B., Thompson, C., Bolton, J., Fyfe, A., Gupta, S., Tan, T. K., Gilbert-Jaramillo, J., James, W., Knight, M., Carroll, M. W., Skelly, D., Dold, C., Peng, Y., Levin, R., Dong, T., Pollard, A. J., Knight, J. C., Klenerman, P., Temperton, N., Hall, D. R., Williams, M. A., Paterson, N. G., Bertram, F. K. R., Siebert, C. A., Clare, D. K., Howe, A., Radecke, J., Song, Y., Townsend, A. R., Huang, K.-Y. A., Fry, E. E., Mongkolsapaya, J., Diamond, M. S., Ren, J., Stuart, D. I., & Screaton, G. R.
Affiliations
  • Centre for Human Genetics (GB)
  • Diamond Light Source (GB)
  • Washington University in St. Louis (US)
  • University of Oxford (GB)
  • Worthing Hospital (GB)
  • Medway School of Pharmacy (GB)
  • Chang Gung University (TW)
  • Siriraj Hospital (TH)
Corresponding author
  • Mongkolsapaya, Juthathip
  • Diamond, Michael S.
  • Ren, Jingshan
  • Stuart, David I.
  • Screaton, Gavin R.
Venue
Cell
Publisher
Elsevier BV
Published
2021-04
Volume
184
Issue
8
Pages
2183-2200.e22
ISSN
0092-8674 (ISSN-L)
OpenAlex
W3129414840
Cited by
371
References
75
Citations by year
2026: 22 · 2025: 34 · 2024: 41 · 2023: 67 · 2022: 115 · 2021: 92
FWCI
25.18
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Kent Academic Repository (University of Kent) (acceptedVersion)
  • Warwick Research Archive Portal (University of Warwick) (acceptedVersion)
  • Digital Commons@Becker (Washington University School of Medicine) (submittedVersion, cc-by)
  • Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, cc-by)
Funders
  • U.S. Environmental Protection Agency
  • Cancer Research UK (C375/A17721)
  • Medical Research Council (MC_PC_20016, MR/N00065X/1, MC_PC_19060, 204969/Z/16/Z)
  • China Academy of Chinese Medical Sciences Institute of Chinese Materia Medica (2018-I2M-2-002)
  • Defense Advanced Research Projects Agency (GB-CHC-210183, HR001117S0019)
  • NIHR Oxford Biomedical Research Centre
  • Department of Health and Social Care
  • National Institute for Health Research (109965MA)
  • NIH
  • Wellcome Trust (060208/Z/00/Z, 203141/Z/16/Z, 095541/A/11/Z, 101122/Z/13/Z, 090532/Z/09/Z)
  • Chinese Academy of Medical Sciences
  • Helen Hay Whitney Foundation
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
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Monoclonal and Polyclonal Antibodies Research
Keywords
SARS-CoV-2, spike protein, receptor binding domain, monoclonal antibodies, neutralizing antibodies, antibody binding sites, epitope mapping, competitive binding assay, antibody structure, N-terminal domain, V gene usage, germline antibodies, therapeutic antibodies
MeSH terms
COVID-19, SARS-CoV-2, Animals, Antibodies, Monoclonal, Antibodies, Viral, Epitopes, Binding Sites, Antibody, Chlorocebus aethiops, Cricetulus, Female, Humans, Male, Mice, Transgenic, Models, Molecular, Protein Binding, Vero Cells, CHO Cells, Protein Structure, Tertiary, Mice, Antibodies, Neutralizing, HEK293 Cells, Spike Glycoprotein, Coronavirus

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