Post-fusion hairpin conformation of the sars coronavirus spike glycoprotein

Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.210 

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This is version 1.5 of the entry. See complete history


Central ions and lateral asparagine/glutamine zippers stabilize the post-fusion hairpin conformation of the SARS coronavirus spike glycoprotein

Duquerroy, S.Vigouroux, A.Rottier, P.J.M.Rey, F.A.Bosch, B.J.

(2005) Virology 335: 276-285

  • DOI: https://doi.org/10.1016/j.virol.2005.02.022
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The coronavirus spike glycoprotein is a class I membrane fusion protein with two characteristic heptad repeat regions (HR1 and HR2) in its ectodomain. Here, we report the X-ray structure of a previously characterized HR1/HR2 complex of the severe acute respiratory syndrome coronavirus spike protein. As expected, the HR1 and HR2 segments are organized in antiparallel orientations within a rod-like molecule. The HR1 helices form an exceptionally long (120 A) internal coiled coil stabilized by hydrophobic and polar interactions. A striking arrangement of conserved asparagine and glutamine residues of HR1 propagates from two central chloride ions, providing hydrogen-bonding "zippers" that strongly constrain the path of the HR2 main chain, forcing it to adopt an extended conformation at either end of a short HR2 alpha-helix.

  • Organizational Affiliation

    Laboratoire de Virologie Moléculaire and Structurale, UMR 2472/1157 CNRS-INRA and IFR 115, 1 Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
E2 Glycoprotein
A, B
149Severe acute respiratory syndrome-related coronavirusMutation(s): 0 
Gene Names: S
Find proteins for P59594 (Severe acute respiratory syndrome coronavirus)
Explore P59594 
Go to UniProtKB:  P59594
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP59594
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.210 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.983α = 90
b = 41.983β = 90
c = 320.544γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-05-17
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2014-04-23
    Changes: Experimental preparation
  • Version 1.4: 2017-08-23
    Changes: Refinement description, Source and taxonomy
  • Version 1.5: 2023-10-25
    Changes: Data collection, Database references, Derived calculations, Refinement description