1VLK

STRUCTURE OF VIRAL INTERLEUKIN-10

• PDB DOI: https://doi.org/10.2210/pdb1VLK/pdb

• Classification: CYTOKINE
• Organism(s): human gammaherpesvirus 4
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1997-02-14 Released: 1997-04-01 
• Deposition Author(s): Zdanov, A., Schalk-Hihi, C., Wlodawer, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Work: 
  0.191 (Depositor), 0.180 (DCC) 

Literature

Crystal structure of Epstein-Barr virus protein BCRF1, a homolog of cellular interleukin-10.

Zdanov, A., Schalk-Hihi, C., Menon, S., Moore, K.W., Wlodawer, A.

(1997) J Mol Biol 268: 460-467

• PubMed: 9159483 
• DOI: https://doi.org/10.1006/jmbi.1997.0990
• Primary Citation of Related Structures:  
  1VLK


• PubMed Abstract: 
  

  The crystal structure of Epstein-Barr virus protein BCRF1, an analog of cellular interleukin-10 (IL-10), has been determined at the resolution of 1.9 A and refined to an R-factor 0.191. The structure of this cytokine is similar to that of human IL-10 (hIL-10), forming an intercalated dimer of two 17 kDa polypeptides related by a crystallographic 2-fold symmetry axis. BCRF1 exhibits novel conformations of the N-terminal coil and of the loop between helices A and B compared to hIL-10. These regions are likely to be involved in binding of one or more components of the IL-10 receptor system, and thus the structural differences may account for the lower binding affinity and limited spectrum of biological activities of viral IL-10, compared to hIL-10.

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Organizational Affiliation: 

Macromolecular Structure Laboratory, NCI-Frederick Cancer Research and Development Center, ABL-Basic Research Program, Frederick, MD 21702, USA.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content

• Total Structure Weight: 17.16 kDa 
• Atom Count: 1,193 
• Modelled Residue Count: 142 
• Deposited Residue Count: 145 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
VIRAL INTERLEUKIN-10	A	145	human gammaherpesvirus 4	Mutation(s): 0
UniProt
Find proteins for P03180 (Epstein-Barr virus (strain B95-8)) Explore P03180  Go to UniProtKB:  P03180

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Work:  0.191 (Depositor), 0.180 (DCC) 

Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 36.27	α = 90
b = 36.27	β = 90
c = 219.6	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
PROFFT	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-04-01 
Deposition Author(s): Zdanov, A., Schalk-Hihi, C., Wlodawer, A.

Revision History  

• Version 1.0: 1997-04-01
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance
• Version 1.3: 2024-10-23
  Changes: Data collection, Database references, Structure summary