3L29

Crystal Structure of Zaire Ebola VP35 interferon inhibitory domain K319A/R322A mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Mutations abrogating VP35 interaction with double-stranded RNA render ebola virus avirulent in guinea pigs.

Prins, K.C.Delpeut, S.Leung, D.W.Reynard, O.Volchkova, V.A.Reid, S.P.Ramanan, P.Cardenas, W.B.Amarasinghe, G.K.Volchkov, V.E.Basler, C.F.

(2010) J.Virol. 84: 3004-3015

  • DOI: 10.1128/JVI.02459-09

  • PubMed Abstract: 
  • Ebola virus (EBOV) protein VP35 is a double-stranded RNA (dsRNA) binding inhibitor of host interferon (IFN)-alpha/beta responses that also functions as a viral polymerase cofactor. Recent structural studies identified key features, including a centra ...

    Ebola virus (EBOV) protein VP35 is a double-stranded RNA (dsRNA) binding inhibitor of host interferon (IFN)-alpha/beta responses that also functions as a viral polymerase cofactor. Recent structural studies identified key features, including a central basic patch, required for VP35 dsRNA binding activity. To address the functional significance of these VP35 structural features for EBOV replication and pathogenesis, two point mutations, K319A/R322A, that abrogate VP35 dsRNA binding activity and severely impair its suppression of IFN-alpha/beta production were identified. Solution nuclear magnetic resonance (NMR) spectroscopy and X-ray crystallography reveal minimal structural perturbations in the K319A/R322A VP35 double mutant and suggest that loss of basic charge leads to altered function. Recombinant EBOVs encoding the mutant VP35 exhibit, relative to wild-type VP35 viruses, minimal growth attenuation in IFN-defective Vero cells but severe impairment in IFN-competent cells. In guinea pigs, the VP35 mutant virus revealed a complete loss of virulence. Strikingly, the VP35 mutant virus effectively immunized animals against subsequent wild-type EBOV challenge. These in vivo studies, using recombinant EBOV viruses, combined with the accompanying biochemical and structural analyses directly correlate VP35 dsRNA binding and IFN inhibition functions with viral pathogenesis. Moreover, these studies provide a framework for the development of antivirals targeting this critical EBOV virulence factor.


    Related Citations: 
    • Preliminary X-ray studies of the Ebola VP35 IFN inhibitory domain mutants that display diminished dsRNA binding and immune suppression.
      Prins, K.C.,Delpeut, S.,Leung, D.W.,Reynard, O.,Volchkova, V.A.,Reid, S.P.,Ramanan, P.,Cardenas, W.B.,Amarasinghe, G.K.,Volchkov, V.E.,Basler, C.F.
      () TO BE PUBLISHED --: --


    Organizational Affiliation

    Department of Microbiology, Mount Sinai School of Medicine, New York, New York 10029, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Polymerase cofactor VP35
A, B
129Zaire ebolavirus (strain Mayinga-76)Mutation(s): 2 
Gene Names: VP35
Find proteins for Q05127 (Zaire ebolavirus (strain Mayinga-76))
Go to UniProtKB:  Q05127
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.191 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 51.430α = 90.00
b = 66.070β = 90.00
c = 72.640γ = 90.00
Software Package:
Software NamePurpose
d*TREKdata reduction
REFMACrefinement
CrystalCleardata collection
PHASERphasing
d*TREKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-02-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance