1WDF

crystal structure of MHV spike protein fusion core


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.224 

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This is version 1.3 of the entry. See complete history


Literature

Structural Basis for Coronavirus-mediated Membrane Fusion: CRYSTAL STRUCTURE OF MOUSE HEPATITIS VIRUS SPIKE PROTEIN FUSION CORE

Xu, Y.Liu, Y.Lou, Z.Qin, L.Li, X.Bai, Z.Pang, H.Tien, P.Gao, G.F.Rao, Z.

(2004) J Biol Chem 279: 30514-30522

  • DOI: 10.1074/jbc.M403760200
  • Primary Citation of Related Structures:  
    1WDG, 1WDF

  • PubMed Abstract: 
  • The surface transmembrane glycoprotein is responsible for mediating virion attachment to cell and subsequent virus-cell membrane fusion. However, the molecular mechanisms for the viral entry of coronaviruses remain poorly understood. The crystal structure of the fusion core of mouse hepatitis virus S protein, which represents the first fusion core structure of any coronavirus, reveals a central hydrophobic coiled coil trimer surrounded by three helices in an oblique, antiparallel manner ...

    The surface transmembrane glycoprotein is responsible for mediating virion attachment to cell and subsequent virus-cell membrane fusion. However, the molecular mechanisms for the viral entry of coronaviruses remain poorly understood. The crystal structure of the fusion core of mouse hepatitis virus S protein, which represents the first fusion core structure of any coronavirus, reveals a central hydrophobic coiled coil trimer surrounded by three helices in an oblique, antiparallel manner. This structure shares significant similarity with both the low pH-induced conformation of influenza hemagglutinin and fusion core of HIV gp41, indicating that the structure represents a fusion-active state formed after several conformational changes. Our results also indicate that the mechanisms for the viral fusion of coronaviruses are similar to those of influenza virus and HIV. The coiled coil structure has unique features, which are different from other viral fusion cores. Highly conserved heptad repeat 1 (HR1) and HR2 regions in coronavirus spike proteins indicate a similar three-dimensional structure among these fusion cores and common mechanisms for the viral fusion. We have proposed the binding regions of HR1 and HR2 of other coronaviruses and a structure model of their fusion core based on our mouse hepatitis virus fusion core structure and sequence alignment. Drug discovery strategies aimed at inhibiting viral entry by blocking hairpin formation may be applied to the inhibition of a number of emerging infectious diseases, including severe acute respiratory syndrome.


    Organizational Affiliation

    Laboratory of Structural Biology, Tsinghua University, Beijing 100084, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
E2 glycoproteinA, B95Murine hepatitis virus strain A59Mutation(s): 0 
Gene Names: S
UniProt
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: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.224 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.3α = 90
b = 48.3β = 90
c = 199.6γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SOLVEphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-06-15
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Source and taxonomy, Version format compliance
  • Version 1.3: 2017-08-16
    Changes: Refinement description, Source and taxonomy