Structural insights into the multifunctional protein VP3 of Birnaviruses

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.224 

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Structural insights into the multifunctional protein VP3 of birnaviruses.

Casanas, A.Navarro, A.Ferrer-Orta, C.Gonzalez, D.Rodriguez, J.F.Verdaguer, N.

(2008) Structure 16: 29-37

  • DOI: https://doi.org/10.1016/j.str.2007.10.023
  • Primary Citation of Related Structures:  
    2R18, 2Z7J

  • PubMed Abstract: 

    Infectious bursal disease virus (IBDV), a member of the Birnaviridae family, is the causative agent of one of the most harmful poultry diseases. The IBDV genome encodes five mature proteins; of these, the multifunctional protein VP3 plays an essential role in virus morphogenesis. This protein, which interacts with the structural protein VP2, with the double-stranded RNA genome, and with the virus-encoded, RNA-dependent RNA polymerase, VP1, is involved not only in the formation of the viral capsid, but also in the recruitment of VP1 into the capsid and in the encapsidation of the viral genome. Here, we report the X-ray structure of the central region of VP3, residues 92-220, consisting of two alpha-helical domains connected by a long and flexible hinge that are organized as a dimer. Unexpectedly, the overall fold of the second VP3 domain shows significant structural similarities with different transcription regulation factors.

  • Organizational Affiliation

    Institut de Biologia Molecular de Barcelona, Consejo Superior de Investigaciones Cientificas, Parc Científic de Barcelona, Josep Samitier 1-5, Barcelona, Spain.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Capsid assembly protein VP3139Infectious bursal disease virusMutation(s): 0 
Find proteins for P25220 (Avian infectious bursal disease virus (strain PBG-98))
Explore P25220 
Go to UniProtKB:  P25220
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP25220
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.224 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 68.316α = 90
b = 68.316β = 90
c = 71.295γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
DNAdata collection

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-02-05
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-10-25
    Changes: Refinement description
  • Version 1.3: 2024-02-21
    Changes: Data collection, Database references