Crystal structure of ORF52 from Murid herpesvirus (MUHV-4) (Murine gammaherpesvirus 68) at 2.1 A resolution. Northeast Structural Genomics Consortium target MHR28B.

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.215 

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Structural and functional studies of the abundant tegument protein ORF52 from murine gammaherpesvirus 68.

Benach, J.Wang, L.Chen, Y.Ho, C.K.Lee, S.Seetharaman, J.Xiao, R.Acton, T.B.Montelione, G.T.Deng, H.Sun, R.Tong, L.

(2007) J Biol Chem 282: 31534-31541

  • DOI: https://doi.org/10.1074/jbc.M705637200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The tegument is a layer of proteins between the nucleocapsid and the envelope of herpesviruses. The functions of most tegument proteins are still poorly understood. In murine gammaherpesvirus 68, ORF52 is an abundant tegument protein of 135 residues that is required for the assembly and release of infectious virus particles. To help understand the molecular basis for the function of this protein, we have determined its crystal structure at 2.1 A resolution. The structure reveals a dimeric association of this protein. Interestingly, an N-terminal alpha-helix that assumes different conformation in the two monomers of the dimer mediates the formation of an asymmetrical tetramer and contains many highly conserved residues. Structural and sequence analyses suggest that this helix is more likely involved in interactions with other components of the tegument or nucleocapsid of the virus and that ORF52 functions as a symmetrical dimer. The asymmetrical tetramer of ORF52 may be a "latent" form of the protein, when it is not involved in virion assembly. The self-association of ORF52 has been confirmed by co-immunoprecipitation and fluorescence resonance energy transfer experiments. Deletion of the N-terminal alpha-helix, as well as mutation of the conserved Arg(95) residue, abolished the function of ORF52. The results of the functional studies are fully consistent with the structural observations and indicate that the N-terminal alpha-helix is a crucial site of interaction for ORF52.

  • Organizational Affiliation

    Department of Biological Sciences, Northeast Structural Genomics Consortium, Columbia University, New York, New York 10027, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Hypothetical protein BQLF2
A, B
110Murid gammaherpesvirus 4Mutation(s): 4 
Gene Names: BQLF252GAMMAHV.ORF52
Find proteins for P88989 (Murid herpesvirus 4)
Explore P88989 
Go to UniProtKB:  P88989
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP88989
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on PE5

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
C18 H38 O9
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on MSE
A, B
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.215 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.462α = 90
b = 49.393β = 111.88
c = 56.379γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
ADSCdata collection
HKL-2000data reduction

Structure Validation

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Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2007-01-30
    Type: Initial release
  • Version 1.1: 2007-09-17
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Refinement description
  • Version 1.4: 2017-10-25
    Changes: Author supporting evidence
  • Version 1.5: 2023-12-27
    Changes: Data collection, Database references, Derived calculations, Structure summary