6F8P

Crystal structure of Gn from Rift Valley fever virus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.167 

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This is version 1.1 of the entry. See complete history


Literature

Shielding and activation of a viral membrane fusion protein.

Halldorsson, S.Li, S.Li, M.Harlos, K.Bowden, T.A.Huiskonen, J.T.

(2018) Nat Commun 9: 349-349

  • DOI: 10.1038/s41467-017-02789-2
  • Primary Citation of Related Structures:  
    6F9B, 6F9D, 6F9C, 6F9F, 6F9E, 6F8P

  • PubMed Abstract: 
  • Entry of enveloped viruses relies on insertion of hydrophobic residues of the viral fusion protein into the host cell membrane. However, the intermediate conformations during fusion remain unknown. Here, we address the fusion mechanism of Rift Valley fever virus ...

    Entry of enveloped viruses relies on insertion of hydrophobic residues of the viral fusion protein into the host cell membrane. However, the intermediate conformations during fusion remain unknown. Here, we address the fusion mechanism of Rift Valley fever virus. We determine the crystal structure of the Gn glycoprotein and fit it with the Gc fusion protein into cryo-electron microscopy reconstructions of the virion. Our analysis reveals how the Gn shields the hydrophobic fusion loops of the Gc, preventing premature fusion. Electron cryotomography of virions interacting with membranes under acidic conditions reveals how the fusogenic Gc is activated upon removal of the Gn shield. Repositioning of the Gn allows extension of Gc and insertion of fusion loops in the outer leaflet of the target membrane. These data show early structural transitions that enveloped viruses undergo during host cell entry and indicate that analogous shielding mechanisms are utilized across diverse virus families.


    Organizational Affiliation

    Helsinki Institute of Life Science and Faculty of Environmental and Biological Sciences, University of Helsinki, Viikinkaari 1, Helsinki, 00014, Finland. juha.huiskonen@strubi.ox.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GlycoproteinA316Rift Valley fever virusMutation(s): 0 
UniProt
Find proteins for P21401 (Rift valley fever virus (strain ZH-548 M12))
Explore P21401 
Go to UniProtKB:  P21401
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.167 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.39α = 90
b = 94.18β = 90
c = 97.99γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
xia2data reduction
xia2data scaling
autoSHARPphasing

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Medical Research Council (United Kingdom)United KingdomMR/N002091/1
Medical Research Council (United Kingdom)United KingdomMR/L009528/1

Revision History  (Full details and data files)

  • Version 1.0: 2018-01-31
    Type: Initial release
  • Version 1.1: 2018-02-07
    Changes: Database references, Source and taxonomy