Cited by 1,073SARS-CoV-2 and COVID-19 ResearchAnimal Virus Infections Studiesvaccines and immunoinformatics approaches

Immunogenicity and structures of a rationally designed prefusion MERS-CoV spike antigen

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Pallesen, Jesper, Wang, Nianshuang, Corbett, Kizzmekia S., Wrapp, Daniel, Kirchdoerfer, Robert N., Turner, Hannah L., Cottrell, Christopher A., Becker, Michelle M. +10 more·2017·Proceedings of the National Academy of Sciences

Abstract

Middle East respiratory syndrome coronavirus (MERS-CoV) is a lineage C betacoronavirus that since its emergence in 2012 has caused outbreaks in human populations with case-fatality rates of ∼36%. As in other coronaviruses, the spike (S) glycoprotein of MERS-CoV mediates receptor recognition and membrane fusion and is the primary target of the humoral immune response during infection. Here we use structure-based design to develop a generalizable strategy for retaining coronavirus S proteins in the antigenically optimal prefusion conformation and demonstrate that our engineered immunogen is able to elicit high neutralizing antibody titers against MERS-CoV. We also determined high-resolution structures of the trimeric MERS-CoV S ectodomain in complex with G4, a stem-directed neutralizing antibody. The structures reveal that G4 recognizes a glycosylated loop that is variable among coronaviruses and they define four conformational states of the trimer wherein each receptor-binding domain is either tightly packed at the membrane-distal apex or rotated into a receptor-accessible conformation. Our studies suggest a potential mechanism for fusion initiation through sequential receptor-binding events and provide a foundation for the structure-based design of coronavirus vaccines.

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Crossref · 10.1073/pnas.1707304114

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  • Both vaccines encode the same full-length, pre-fusion stabilized SARS-CoV-2 spike protein and are encapsulated in lipid nanoparticles with identical composition.

    “Both vaccines encode the same full-length, pre-fusion stabilized severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) spike protein13,14 and are encapsulated in lipid nanoparticles (LNPs) with identical composition.”

    From Optimization of non-coding regions for a non-modified mRNA COVID-19 vaccine (2022) · cites this paper as [13]

    The Results (p. 3) describe a two-proline design that stabilizes MERS-CoV spike in its prefusion form and report analogous effects for SARS-CoV spike. The paper does not establish that the two vaccines encode the same full-length SARS-CoV-2 spike. The citation is attached to the spike-protein description, not the subsequent LNP-composition statement. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Stabilizing coronavirus spike proteins by substituting two prolines at the top of heptad repeat 1 prevents structural rearrangements of the fusion (S2) subunit.

    “Stabilizing coronavirus spike proteins by substituting two prolines at the top of heptad repeat 1 prevents structural rearrangements of the fusion (S2) subunit.”

    From An mRNA Vaccine against SARS-CoV-2 — Preliminary Report (2020) · cites this paper as [27]

    The Results (p. 3) describe two proline substitutions near HR1 that retain the prefusion shape of MERS-CoV spike, with similar effects in two other betacoronavirus spikes. The Discussion (p. 5) says proline substitution can disfavor refolding of the HR1–central-helix linker and impair or abolish fusion; it does not establish that the substitutions prevent all structural rearrangements of S2. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • 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 [27]

  • Immune responses are improved by introducing two consecutive proline residues (2P), which are known to retain the full-length S protein in the prefusion conformation.

    “Immune responses are improved by introducing two consecutive proline residues (2P), which are known to retain the full-length S protein in the prefusion conformation.64,65”

    From COVID-19 mRNA vaccines: Platforms and current developments (2022) · cites this paper as [64]

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Authors
Pallesen, J., Wang, N., Corbett, K. S., Wrapp, D., Kirchdoerfer, R. N., Turner, H. L., Cottrell, C. A., Becker, M. M., Wang, L., Shi, W., Kong, W.-P., Andres, E. L., Kettenbach, A. N., Denison, M. R., Chappell, J. D., Graham, B. S., Ward, A. B., & McLellan, J. S.
Affiliations
  • Scripps Research Institute (US)
  • Dartmouth College (US)
  • National Institute of Allergy and Infectious Diseases (US)
  • Vanderbilt University Medical Center (US)
  • Vanderbilt University (US)
Corresponding author
  • Pallesen, Jesper
  • Wang, Nianshuang
  • Corbett, Kizzmekia S.
  • Ward, Andrew B.
  • McLellan, Jason S.
Venue
Proceedings of the National Academy of Sciences
Published
2017-08-14
Volume
114
Issue
35
Pages
E7348-E7357
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2750464792
Cited by
1,073
References
89
Citations by year
2026: 48 · 2025: 75 · 2024: 98 · 2023: 127 · 2022: 174 · 2021: 275 · 2020: 220 · 2019: 31 · 2018: 17 · 2017: 6
FWCI
57.66
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
Funders
  • HHS | NIH | National Institute of Allergy and Infectious Diseases (R01AI127521)
  • HHS | NIH | National Institute of General Medical Sciences (P20GM113132)
  • Division of Intramural Research, National Institute of Allergy and Infectious Diseases (AI005125)
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, spike protein, structure-based vaccine design, neutralizing antibodies, receptor binding domain, receptor recognition, membrane fusion mechanism, coronavirus vaccines
MeSH terms
Animals, Antibodies, Viral, Coronaviridae, Humans, Immunoglobulin G, Mice, Inbred BALB C, Protein Binding, Protein Conformation, Receptors, Virus, Structure-Activity Relationship, Vaccination, Viral Vaccines, Coronavirus Infections, Crystallography, X-Ray, Immunity, Humoral, Antibodies, Neutralizing, Spike Glycoprotein, Coronavirus, Middle East Respiratory Syndrome Coronavirus

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