Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors and generated by PISA,PQS (software)

Biological Assembly Evidence: light scattering

Macromolecule Content

• Total Structure Weight: 25.83 kDa 
• Atom Count: 1722 
• Residue Count: 189 
• Unique protein chains: 1

2OA5

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

• DOI: 10.2210/pdb2OA5/pdb

• Classification: STRUCTURAL PROTEIN
• Organism(s): Murid gammaherpesvirus 4
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2006-12-14 Released: 2007-01-30 
• Deposition Author(s): Benach, J., Chen, Y., Seetharaman, J., Janjua, H., Xiao, R., Cunningham, K., Ma, L.-C., Ho, C.K., Acton, T.B., Montelione, G.T., Hunt, J.F., Tong, L., Northeast Structural Genomics Consortium (NESG)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.241 
• R-Value Work: 0.215 
• R-Value Observed: 0.215 

Literature

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

• PubMed: 17699518 
• DOI: 10.1074/jbc.M705637200
• Primary Citation of Related Structures:  
  2OA5


• 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Hypothetical protein BQLF2	A, B	110	Murid gammaherpesvirus 4	Mutation(s): 4  Gene Names: BQLF2, 52, GAMMAHV.ORF52
Find proteins for P88989 (Murid herpesvirus 4) Explore P88989  Go to UniProtKB:  P88989

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PE5	A, B	3,6,9,12,15,18,21,24-OCTAOXAHEXACOSAN-1-OL C18 H38 O9 CUDPPTPIUWYGFI-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A,B	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• 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 = 93.462	α = 90
b = 49.393	β = 111.88
c = 56.379	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
COMO	phasing
CNS	refinement
PDB_EXTRACT	data extraction
ADSC	data collection
HKL-2000	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-12-14 
• Released Date: 2007-01-30 
Deposition Author(s): Benach, J., Chen, Y., Seetharaman, J., Janjua, H., Xiao, R., Cunningham, K., Ma, L.-C., Ho, C.K., Acton, T.B., Montelione, G.T., Hunt, J.F., Tong, L., Northeast Structural Genomics Consortium (NESG)

Revision History 

• 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