Crystal structure of the RNA binding domain of Bluetongue virus non-structural protein 2(NS2)

Experimental Data Snapshot

  • Resolution: 2.40 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.214 

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Structure and Assembly of the RNA Binding Domain of Bluetongue Virus Non-Structural Protein 2

Butan, C.Van Der Zandt, H.Tucker, P.

(2004) J Biol Chem 279: 37613

  • DOI: https://doi.org/10.1074/jbc.M400502200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Bluetongue virus non-structural protein 2 belongs to a class of highly conserved proteins found in orbiviruses of the Reoviridae family. Non-structural protein 2 forms large multimeric complexes and localizes to cytoplasmic inclusions in infected cells. It is able to bind single-stranded RNA non-specifically, and it has been suggested that the protein is involved in the selection and condensation of the Bluetongue virus RNA segments prior to genome encapsidation. We have determined the x-ray structure of the N-terminal domain (sufficient for the RNA binding ability of non-structural protein 2) to 2.4 A resolution using anomalous scattering methods. Crystals of this apparently insoluble domain were obtained by in situ proteolysis of a soluble construct. The asymmetric unit shows two monomers related by non-crystallographic symmetry, with each monomer folded as a beta sandwich with a unique topology. The crystal structure reveals extensive monomer-monomer interactions, which explain the ability of the protein to self-assemble into large homomultimeric complexes. Of the entire surface area of the monomer, one-third is used to create the interfaces of the curved multimeric assembly observed in the x-ray structure. The structure reported here shows how the N-terminal domain would be able to bind single-stranded RNA non-specifically protecting the bound regions in a heterogeneous multimeric but not polymeric complex.

  • Organizational Affiliation

    European Molecular Biology Laboratory, c/o Deutsches Elektronen-Synchrotron, Notkestrasse 85, D-22603 Hamburg, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
187Bluetongue virus 8Mutation(s): 0 
Find proteins for P23065 (Bluetongue virus 10 (isolate USA))
Explore P23065 
Go to UniProtKB:  P23065
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP23065
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.40 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.214 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.296α = 90
b = 102.296β = 90
c = 77.915γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-07-13
    Type: Initial release
  • Version 1.1: 2013-12-04
    Changes: Derived calculations, Non-polymer description, Other, Source and taxonomy, Structure summary, Version format compliance
  • Version 1.2: 2019-07-24
    Changes: Data collection