A structure-based mechanism of SARS virus membrane fusion

Experimental Data Snapshot

  • Resolution: 1.50 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.213 

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Structures and Polymorphic Interactions of Two Heptad-Repeat Regions of the SARS Virus S2 Protein.

Deng, Y.Liu, J.Zheng, Q.Yong, W.Lu, M.

(2006) Structure 14: 889-899

  • DOI: https://doi.org/10.1016/j.str.2006.03.007
  • Primary Citation of Related Structures:  
    1ZV7, 1ZV8, 1ZVA, 1ZVB

  • PubMed Abstract: 

    Entry of SARS coronavirus into its target cell requires large-scale structural transitions in the viral spike (S) glycoprotein in order to induce fusion of the virus and cell membranes. Here we describe the identification and crystal structures of four distinct alpha-helical domains derived from the highly conserved heptad-repeat (HR) regions of the S2 fusion subunit. The four domains are an antiparallel four-stranded coiled coil, a parallel trimeric coiled coil, a four-helix bundle, and a six-helix bundle that is likely the final fusogenic form of the protein. When considered together, the structural and thermodynamic features of the four domains suggest a possible mechanism whereby the HR regions, initially sequestered in the native S glycoprotein spike, are released and refold sequentially to promote membrane fusion. Our results provide a structural framework for understanding the control of membrane fusion and should guide efforts to intervene in the SARS coronavirus entry process.

  • Organizational Affiliation

    Department of Biochemistry, Weill Medical College of Cornell University, New York, New York 10021, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
E2 glycoprotein77Severe 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: 1.50 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.213 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.97α = 90
b = 146.593β = 90
c = 24.013γ = 90
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: 2006-05-16
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Derived calculations, Version format compliance
  • Version 1.3: 2017-08-16
    Changes: Source and taxonomy
  • Version 1.4: 2023-08-23
    Changes: Data collection, Database references, Refinement description