4GHA

Crystal structure of Marburg virus VP35 RNA binding domain bound to 12-bp dsRNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Marburg Virus VP35 Can Both Fully Coat the Backbone and Cap the Ends of dsRNA for Interferon Antagonism.

Bale, S.Julien, J.P.Bornholdt, Z.A.Kimberlin, C.R.Halfmann, P.Zandonatti, M.A.Kunert, J.Kroon, G.J.Kawaoka, Y.Macrae, I.J.Wilson, I.A.Saphire, E.O.

(2012) Plos Pathog. 8: e1002916-e1002916

  • DOI: 10.1371/journal.ppat.1002916
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Filoviruses, including Marburg virus (MARV) and Ebola virus (EBOV), cause fatal hemorrhagic fever in humans and non-human primates. All filoviruses encode a unique multi-functional protein termed VP35. The C-terminal double-stranded (ds)RNA-binding d ...

    Filoviruses, including Marburg virus (MARV) and Ebola virus (EBOV), cause fatal hemorrhagic fever in humans and non-human primates. All filoviruses encode a unique multi-functional protein termed VP35. The C-terminal double-stranded (ds)RNA-binding domain (RBD) of VP35 has been implicated in interferon antagonism and immune evasion. Crystal structures of the VP35 RBD from two ebolaviruses have previously demonstrated that the viral protein caps the ends of dsRNA. However, it is not yet understood how the expanses of dsRNA backbone, between the ends, are masked from immune surveillance during filovirus infection. Here, we report the crystal structure of MARV VP35 RBD bound to dsRNA. In the crystal structure, molecules of dsRNA stack end-to-end to form a pseudo-continuous oligonucleotide. This oligonucleotide is continuously and completely coated along its sugar-phosphate backbone by the MARV VP35 RBD. Analysis of dsRNA binding by dot-blot and isothermal titration calorimetry reveals that multiple copies of MARV VP35 RBD can indeed bind the dsRNA sugar-phosphate backbone in a cooperative manner in solution. Further, MARV VP35 RBD can also cap the ends of the dsRNA in solution, although this arrangement was not captured in crystals. Together, these studies suggest that MARV VP35 can both coat the backbone and cap the ends, and that for MARV, coating of the dsRNA backbone may be an essential mechanism by which dsRNA is masked from backbone-sensing immune surveillance molecules.


    Organizational Affiliation

    Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, California, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Polymerase cofactor VP35
A, C, E, G
146Lake Victoria marburgvirus (strain Musoke-80)Mutation(s): 0 
Gene Names: VP35
Find proteins for P35259 (Lake Victoria marburgvirus (strain Musoke-80))
Go to UniProtKB:  P35259
Entity ID: 2
MoleculeChainsLengthOrganism
RNA (5'-R(*CP*UP*AP*GP*AP*CP*GP*UP*CP*UP*AP*G)-3')I,J12N/A
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.209 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 36.593α = 90.00
b = 99.191β = 89.92
c = 81.801γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
PHASERphasing
HKL-2000data scaling
ADSCdata collection
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-08-22
    Type: Initial release
  • Version 1.1: 2012-10-24
    Type: Database references