3L26

Crystal structure of Zaire Ebola VP35 interferon inhibitory domain bound to 8 bp dsRNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.183 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural basis for dsRNA recognition and interferon antagonism by Ebola VP35.

Leung, D.W.Prins, K.C.Borek, D.M.Farahbakhsh, M.Tufariello, J.M.Ramanan, P.Nix, J.C.Helgeson, L.A.Otwinowski, Z.Honzatko, R.B.Basler, C.F.Amarasinghe, G.K.

(2010) Nat Struct Mol Biol 17: 165-172

  • DOI: 10.1038/nsmb.1765
  • Primary Citation of Related Structures:  
    3L25, 3L26, 3L27, 3L28

  • PubMed Abstract: 
  • Ebola viral protein 35 (VP35), encoded by the highly pathogenic Ebola virus, facilitates host immune evasion by antagonizing antiviral signaling pathways, including those initiated by RIG-I-like receptors. Here we report the crystal structure of the ...

    Ebola viral protein 35 (VP35), encoded by the highly pathogenic Ebola virus, facilitates host immune evasion by antagonizing antiviral signaling pathways, including those initiated by RIG-I-like receptors. Here we report the crystal structure of the Ebola VP35 interferon inhibitory domain (IID) bound to short double-stranded RNA (dsRNA), which together with in vivo results reveals how VP35-dsRNA interactions contribute to immune evasion. Conserved basic residues in VP35 IID recognize the dsRNA backbone, whereas the dsRNA blunt ends are 'end-capped' by a pocket of hydrophobic residues that mimic RIG-I-like receptor recognition of blunt-end dsRNA. Residues critical for RNA binding are also important for interferon inhibition in vivo but not for viral polymerase cofactor function of VP35. These results suggest that simultaneous recognition of dsRNA backbone and blunt ends provides a mechanism by which Ebola VP35 antagonizes host dsRNA sensors and immune responses.


    Related Citations: 
    • Preliminary X-ray studies of the Ebola VP35 IFN inhibitory domain bound to double stranded RNA.
      Leung, D.W., Prins, K.C., Borek, D.M., Farahbakhsh, M., Tufariello, J.M., Ramanan, P., Nix, J.C., Helgeson, L.A., Otwinowski, Z., Honzatko, R.B., Basler, C.F., Amarasinghe, G.K.
      () To be published --: --

    Organizational Affiliation

    Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, Iowa, USA.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Polymerase cofactor VP35AB129Ebola virus - Mayinga, Zaire, 1976Mutation(s): 0 
Gene Names: VP35
Find proteins for Q05127 (Zaire ebolavirus (strain Mayinga-76))
Explore Q05127 
Go to UniProtKB:  Q05127
Protein Feature View
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  • Reference Sequence
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 2
    MoleculeChainsLengthOrganismImage
    RNA (5'-R(*CP*GP*CP*AP*UP*GP*CP*G)-3')C8N/A
    Experimental Data & Validation

    Experimental Data

    • Method: X-RAY DIFFRACTION
    • Resolution: 2.40 Å
    • R-Value Free: 0.254 
    • R-Value Work: 0.179 
    • R-Value Observed: 0.183 
    • Space Group: P 43 21 2
    Unit Cell:
    Length ( Å )Angle ( ˚ )
    a = 81.025α = 90
    b = 81.025β = 90
    c = 90.249γ = 90
    Software Package:
    Software NamePurpose
    CrystalCleardata collection
    PHASERphasing
    REFMACrefinement
    d*TREKdata reduction
    d*TREKdata scaling

    Structure Validation

    View Full Validation Report



    Entry History 

    Deposition Data

    Revision History 

    • Version 1.0: 2010-01-26
      Type: Initial release
    • Version 1.1: 2011-07-13
      Changes: Advisory, Version format compliance