Immunogenicity and structures of a rationally designed prefusion MERS-CoV spike antigen
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. As a result, 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.
- Authors:
-
- The Scripps Research Inst., La Jolla, CA (United States)
- Geisel School of Medicine at Dartmouth, Hanover, NH (United States)
- National Inst. of Allergy and Infectious Diseases, Bethesda, MD (United States)
- Vanderbilt Univ. Medical Center, Nashville, TN (United States)
- Geisel School of Medicine at Dartmouth, Hanover, NH (United States); Geisel School of Medicine at Dartmouth, Lebanon, NH (United States)
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); USDOE Office of Science (SC), Basic Energy Sciences (BES); National Institutes of Health (NIH); National Inst. of Allergy and Infectious Diseases; National Inst. of General Medical Sciences
- OSTI Identifier:
- 1390889
- Grant/Contract Number:
- AC02-06CH11357; AC02-76SF00515; R01AI127521; P20GM113132; HHSN261200800001E; P41GM103393
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Proceedings of the National Academy of Sciences of the United States of America
- Additional Journal Information:
- Journal Volume: 114; Journal Issue: 35; Journal ID: ISSN 0027-8424
- Publisher:
- National Academy of Sciences
- Country of Publication:
- United States
- Language:
- ENGLISH
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES; coronavirus; neutralizing antibody; cryo-EM; X-ray; crystallography; peplomer
Citation Formats
Pallesen, Jesper, Wang, Nianshuang, Corbett, Kizzmekia S., Wrapp, Daniel, Kirchdoerfer, Robert N., Turner, Hannah L., Cottrell, Christopher A., Becker, Michelle M., Wang, Lingshu, Shi, Wei, Kong, Wing-Pui, Andres, Erica L., Kettenbach, Arminja N., Denison, Mark R., Chappell, James D., Graham, Barney S., Ward, Andrew B., and McLellan, Jason S. Immunogenicity and structures of a rationally designed prefusion MERS-CoV spike antigen. United States: N. p., 2017.
Web. doi:10.1073/pnas.1707304114.
Pallesen, Jesper, Wang, Nianshuang, Corbett, Kizzmekia S., Wrapp, Daniel, Kirchdoerfer, Robert N., Turner, Hannah L., Cottrell, Christopher A., Becker, Michelle M., Wang, Lingshu, Shi, Wei, Kong, Wing-Pui, Andres, Erica L., Kettenbach, Arminja N., Denison, Mark R., Chappell, James D., Graham, Barney S., Ward, Andrew B., & McLellan, Jason S. Immunogenicity and structures of a rationally designed prefusion MERS-CoV spike antigen. United States. https://doi.org/10.1073/pnas.1707304114
Pallesen, Jesper, Wang, Nianshuang, Corbett, Kizzmekia S., Wrapp, Daniel, Kirchdoerfer, Robert N., Turner, Hannah L., Cottrell, Christopher A., Becker, Michelle M., Wang, Lingshu, Shi, Wei, Kong, Wing-Pui, Andres, Erica L., Kettenbach, Arminja N., Denison, Mark R., Chappell, James D., Graham, Barney S., Ward, Andrew B., and McLellan, Jason S. Mon .
"Immunogenicity and structures of a rationally designed prefusion MERS-CoV spike antigen". United States. https://doi.org/10.1073/pnas.1707304114. https://www.osti.gov/servlets/purl/1390889.
@article{osti_1390889,
title = {Immunogenicity and structures of a rationally designed prefusion MERS-CoV spike antigen},
author = {Pallesen, Jesper and Wang, Nianshuang and Corbett, Kizzmekia S. and Wrapp, Daniel and Kirchdoerfer, Robert N. and Turner, Hannah L. and Cottrell, Christopher A. and Becker, Michelle M. and Wang, Lingshu and Shi, Wei and Kong, Wing-Pui and Andres, Erica L. and Kettenbach, Arminja N. and Denison, Mark R. and Chappell, James D. and Graham, Barney S. and Ward, Andrew B. and McLellan, Jason S.},
abstractNote = {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. As a result, 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.},
doi = {10.1073/pnas.1707304114},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 35,
volume = 114,
place = {United States},
year = {Mon Aug 14 00:00:00 EDT 2017},
month = {Mon Aug 14 00:00:00 EDT 2017}
}
Web of Science
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