6B3O

Tectonic conformational changes of a coronavirus spike glycoprotein promote membrane fusion


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Tectonic conformational changes of a coronavirus spike glycoprotein promote membrane fusion.

Walls, A.C.Tortorici, M.A.Snijder, J.Xiong, X.Bosch, B.J.Rey, F.A.Veesler, D.

(2017) Proc Natl Acad Sci U S A 114: 11157-11162

  • DOI: 10.1073/pnas.1708727114
  • Primary Citation of Related Structures:  
    6B3O

  • PubMed Abstract: 
  • The tremendous pandemic potential of coronaviruses was demonstrated twice in the past few decades by two global outbreaks of deadly pneumonia. The coronavirus spike (S) glycoprotein initiates infection by promoting fusion of the viral and cellular me ...

    The tremendous pandemic potential of coronaviruses was demonstrated twice in the past few decades by two global outbreaks of deadly pneumonia. The coronavirus spike (S) glycoprotein initiates infection by promoting fusion of the viral and cellular membranes through conformational changes that remain largely uncharacterized. Here we report the cryoEM structure of a coronavirus S glycoprotein in the postfusion state, showing large-scale secondary, tertiary, and quaternary rearrangements compared with the prefusion trimer and rationalizing the free-energy landscape of this conformational machine. We also biochemically characterized the molecular events associated with refolding of the metastable prefusion S glycoprotein to the postfusion conformation using limited proteolysis, mass spectrometry, and single-particle EM. The observed similarity between postfusion coronavirus S and paramyxovirus F structures demonstrates that a conserved refolding trajectory mediates entry of these viruses and supports the evolutionary relatedness of their fusion subunits. Finally, our data provide a structural framework for understanding the mode of neutralization of antibodies targeting the fusion machinery and for engineering next-generation subunit vaccines or inhibitors against this medically important virus family.


    Organizational Affiliation

    Department of Biochemistry, University of Washington, Seattle, WA 98195; dveesler@uw.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Spike glycoproteinABC605Murine hepatitis virus strain A59Mutation(s): 0 
Gene Names: S3
Find proteins for P11224 (Murine coronavirus (strain A59))
Explore P11224 
Go to UniProtKB:  P11224
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States1R01GM120553

Revision History 

  • Version 1.0: 2017-10-04
    Type: Initial release
  • Version 1.1: 2017-10-18
    Changes: Author supporting evidence
  • Version 1.2: 2017-11-08
    Changes: Database references
  • Version 1.3: 2018-07-18
    Changes: Data collection, Experimental preparation
  • Version 1.4: 2020-01-01
    Changes: Author supporting evidence