1ILK

INTERLEUKIN-10 CRYSTAL STRUCTURE REVEALS THE FUNCTIONAL DIMER WITH AN UNEXPECTED TOPOLOGICAL SIMILARITY TO INTERFERON GAMMA

• PDB DOI: https://doi.org/10.2210/pdb1ILK/pdb

• Classification: CYTOKINE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1995-04-21 Released: 1995-07-10 
• Deposition Author(s): Zdanov, A., Schalk-Hihi, C., Gustchina, A., Wlodawer, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Work: 0.156 
• R-Value Observed: 0.156 

Literature

Crystal structure of interleukin-10 reveals the functional dimer with an unexpected topological similarity to interferon gamma.

Zdanov, A., Schalk-Hihi, C., Gustchina, A., Tsang, M., Weatherbee, J., Wlodawer, A.

(1995) Structure 3: 591-601

• PubMed: 8590020 
• DOI: https://doi.org/10.1016/s0969-2126(01)00193-9
• Primary Citation of Related Structures:  
  1ILK


• PubMed Abstract: 
  

  Interleukin (IL)-10 is a cytokine that inhibits production of other regulatory factors, including interferon gamma (IFN-gamma) and IL-2. A dimer of IL-10 is present in solution and is presumed to participate in receptor binding, but the nature of the dimer has not been previously reported. An atomic model is necessary to interpret biological activity of IL-10 and to design mutants with agonistic or antagonistic properties.

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Organizational Affiliation: 

Macromolecular Structure Laboratory, NCI-Frederick Cancer Research and Development Center, Maryland 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: 17.8 kDa 
• Atom Count: 1,374 
• Modelled Residue Count: 151 
• Deposited Residue Count: 151 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
INTERLEUKIN-10	A	151	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P22301 (Homo sapiens) Explore P22301  Go to UniProtKB:  P22301
PHAROS:  P22301 GTEx:  ENSG00000136634

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Work: 0.156 
• R-Value Observed: 0.156 
• Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 70.274	α = 90
b = 70.274	β = 90
c = 70.308	γ = 120

Software Package:

Software Name	Purpose
MSC	data collection
X-PLOR	model building
X-PLOR	refinement
PROFFT	refinement
MSC	data reduction
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1995-07-10 
Deposition Author(s): Zdanov, A., Schalk-Hihi, C., Gustchina, A., Wlodawer, A.

Revision History  

• Version 1.0: 1995-07-10
  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