Cited by 86SARS-CoV-2 and COVID-19 ResearchAnimal Virus Infections Studiesvaccines and immunoinformatics approaches

Structural Definition of a Neutralization-sensitive Epitope on the MERS-CoV S1-NTD

Open access
Wang, Nianshuang, Rosen, Osnat, Wang, Lingshu, Turner, Hannah L., Stevens, Laura J., Corbett, Kizzmekia S., Bowman, Charles A., Pallesen, Jesper +10 more·2019·Cell Reports

Abstract

Middle East respiratory syndrome coronavirus (MERS-CoV) emerged into the human population in 2012 and has caused substantial morbidity and mortality. Potently neutralizing antibodies targeting the receptor-binding domain (RBD) on MERS-CoV spike (S) protein have been characterized, but much less is known about antibodies targeting non-RBD epitopes. Here, we report the structural and functional characterization of G2, a neutralizing antibody targeting the MERS-CoV S1 N-terminal domain (S1-NTD). Structures of G2 alone and in complex with the MERS-CoV S1-NTD define a site of vulnerability comprising two loops, each of which contain a residue mutated in G2-escape variants. Cell-surface binding studies and in vitro competition experiments demonstrate that G2 strongly disrupts the attachment of MERS-CoV S to its receptor, dipeptidyl peptidase-4 (DPP4), with the inhibition requiring the native trimeric S conformation. These results advance our understanding of antibody-mediated neutralization of coronaviruses and should facilitate the development of immunotherapeutics and vaccines against MERS-CoV.

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  • S-2P conformational stability translates into greater immunogenicity, based on preservation of neutralization-sensitive epitopes and improved protein expression.

    “Moreover, S-2P conformational stability translates into greater immunogenicity,27-29 based on preservation of neutralization-sensitive epitopes at the apex of the prefusion molecule, as shown for respiratory syncytial virus F glycoprotein,30 and improved protein expression,27 which is particularly advantageous for gene-based antigen delivery.”

    From An mRNA Vaccine against SARS-CoV-2 — Preliminary Report (2020) · cites this paper as [29]

    The Methods describe S-2P as a stabilized MERS-CoV spike protein, and the Discussion says the S1-NTD is immunogenic. Neither passage reports that S-2P’s conformational stability increases immunogenicity; a search for an S-2P immunogenicity comparison and improved expression found no such result in our copy. The citing sentence attaches the preservation-of-epitopes and expression explanations to other citations. (LLM, conf=0.74)

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  • Polyclonal antibodies against multiple non-RBD spike epitopes might block viral attachment, add neutralizing activity, or prevent post-attachment fusion.

    “A polyclonal antibody against multiple epitopes of the S protein beyond the RBD might, for example, inhibit viral attachment156–160, provide additional neutralizing activity161 and/or prevent post-attachment fusion162.”

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  1. Nagae M. Ikeda A. Hane M. Hanashima S. Kitajima K. Sato C. Yamaguchi Y. Crystal structure of anti-polysialic acid antibody single chain Fv fragment complexed with octasialic acid: insight into the binding preference for polysialic acid J. Biol. Chem. 288 2013 33784 33796 24100042 PMC3837122

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Authors
Wang, N., Rosen, O., Wang, L., Turner, H. L., Stevens, L. J., Corbett, K. S., Bowman, C. A., Pallesen, J., Shi, W., Zhang, Y., Leung, K., Kirchdoerfer, R. N., Becker, M. M., Denison, M. R., Chappell, J. D., Ward, A. B., Graham, B. S., & McLellan, J. S.
Affiliations
  • The University of Texas at Austin (US)
  • National Institute of Allergy and Infectious Diseases (US)
  • Scripps Research Institute (US)
  • Vanderbilt University (US)
Corresponding author
McLellan, Jason S.
Venue
Cell Reports
Publisher
Elsevier BV
Published
2019-09
Volume
28
Issue
13
Pages
3395-3405.e6
ISSN
2211-1247 (ISSN-L)
OpenAlex
W2975856930
Cited by
86
References
77
Citations by year
2026: 4 · 2025: 6 · 2024: 6 · 2023: 7 · 2022: 4 · 2021: 19 · 2020: 40
FWCI
12.27
Type
journal article
Language
en
Open access
Locations
  • Cell Reports (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • IUScholarWorks Open (Indiana University) (submittedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
Funders
  • Vaccine Research Center
  • National Institutes of Health (16x142, R01AI127521)
  • U.S. Department of Energy
  • National Institute of Allergy and Infectious Diseases
  • Biological and Environmental Research (DE-AC02-06CH11357)
  • Argonne National Laboratory
Topics
  • Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Virus Infections Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › vaccines and immunoinformatics approaches
Keywords
MERS-CoV, SARS-CoV-2, neutralizing antibodies, antibody epitopes, dipeptidyl peptidase IV, receptor binding, spike protein trimer, antibody-antigen complex structure, vaccine development, immunotherapeutics
MeSH terms
Epitopes, Humans, Middle East Respiratory Syndrome Coronavirus

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