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Structure-guided covalent stabilization of coronavirus spike glycoprotein trimers in the closed conformation

Nature structural & molecular biology, 2020-10, Vol.27 (10), p.942-949 [Peer Reviewed Journal]

COPYRIGHT 2020 Nature Publishing Group ;The Author(s) 2020 ;ISSN: 1545-9993 ;EISSN: 1545-9985 ;DOI: 10.1038/s41594-020-0483-8 ;PMID: 32753755

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Title:
Structure-guided covalent stabilization of coronavirus spike glycoprotein trimers in the closed conformation
Author: McCallum, Matthew ; Walls, Alexandra C ; Bowen, John E ; Corti, Davide ; Veesler, David
Subjects: Antibodies, Monoclonal - metabolism ; Antibodies, Neutralizing - metabolism ; Betacoronavirus - chemistry ; Betacoronavirus - genetics ; Betacoronavirus - immunology ; Betacoronavirus - metabolism ; Causes of ; Conformation ; Coronaviruses ; Cryoelectron Microscopy ; Disulfides - chemistry ; Electrophoresis, Polyacrylamide Gel ; Enzyme-Linked Immunosorbent Assay ; Epidemics ; Genetic aspects ; Glycoproteins ; Health aspects ; Humans ; Models, Molecular ; Mutation ; Observations ; Properties ; Protein Conformation ; Protein Domains ; Protein Engineering ; Protein Multimerization ; Protein Stability ; Proteins ; SARS-CoV-2 ; Spike Glycoprotein, Coronavirus - chemistry ; Spike Glycoprotein, Coronavirus - genetics ; Spike Glycoprotein, Coronavirus - immunology ; Spike Glycoprotein, Coronavirus - metabolism ; United States ; Virulence (Microbiology)
Is Part Of: Nature structural & molecular biology, 2020-10, Vol.27 (10), p.942-949
Description: SARS-CoV-2 is the causative agent of the COVID-19 pandemic, with 10 million infections and more than 500,000 fatalities by June 2020. To initiate infection, the SARS-CoV-2 spike (S) glycoprotein promotes attachment to the host cell surface and fusion of the viral and host membranes. Prefusion SARS-CoV-2 S is the main target of neutralizing antibodies and the focus of vaccine design. However, its limited stability and conformational dynamics are limiting factors for developing countermeasures against this virus. We report here the design of a construct corresponding to the prefusion SARS-CoV-2 S ectodomain trimer, covalently stabilized by a disulfide bond in the closed conformation. Structural and antigenicity analyses show we successfully shut S in the closed state without otherwise altering its architecture. We demonstrate that this strategy is applicable to other β-coronaviruses, such as SARS-CoV and MERS-CoV, and might become an important tool for structural biology, serology, vaccine design and immunology studies.
Publisher: United States: Nature Publishing Group
Language: English
Identifier: ISSN: 1545-9993
EISSN: 1545-9985
DOI: 10.1038/s41594-020-0483-8
PMID: 32753755
Source: MEDLINE
ProQuest Central

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Structure-guided covalent stabilization of coronavirus spike glycoprotein trimers in the closed conformation

COPYRIGHT 2020 Nature Publishing Group ;The Author(s) 2020 ;ISSN: 1545-9993 ;EISSN: 1545-9985 ;DOI: 10.1038/s41594-020-0483-8 ;PMID: 32753755

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