1INR

CYTOKINE SYNTHESIS

• PDB DOI: https://doi.org/10.2210/pdb1INR/pdb

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


• Deposited: 1995-07-31 Released: 1996-10-14 
• Deposition Author(s): Walter, M.R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.337 
• R-Value Work: 0.221 
• R-Value Observed: 0.221 

Literature

Crystal structure of interleukin 10 reveals an interferon gamma-like fold.

Walter, M.R., Nagabhushan, T.L.

(1995) Biochemistry 34: 12118-12125

• PubMed: 7547951 
• DOI: https://doi.org/10.1021/bi00038a004
• Primary Citation of Related Structures:  
  1INR


• PubMed Abstract: 
  

  The crystal structure of recombinant human interleukin 10 (rhIL-10) has been determined by X-ray crystallography at 2.0 A resolution. Interleukin 10 is a dimer composed of identical polypeptide chains related by a 2-fold axis. The molecule is predominantly alpha-helical. The main-chain fold resembles that of interferon gamma (IFN-gamma) in which the structural integrity of each domain is dependent on the intertwining of helices from each peptide chain. Comparison of rhIL-10 and IFN-gamma reveals differences in helix lengths and orientations of the 2-fold related domains. Interleukin 10 and IFN-gamma contain several conserved residues in their internal cores which suggest a possible "fingerprint" for detection of other members of this fold.

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Organizational Affiliation: 

Department of Pharmacology, University of Alabama at Birmingham 35294, 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: 18.67 kDa 
• Atom Count: 1,114 
• Modelled Residue Count: 132 
• Deposited Residue Count: 160 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
INTERLEUKIN-10	A	160	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: 2.00 Å
• R-Value Free: 0.337 
• R-Value Work: 0.221 
• R-Value Observed: 0.221 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 36.37	α = 90
b = 36.37	β = 90
c = 220.97	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1996-10-14 
Deposition Author(s): Walter, M.R.

Revision History  

• Version 1.0: 1996-10-14
  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: 2024-10-30
  Changes: Data collection, Database references, Structure summary