1M4R | pdb_00001m4r

CRYSTAL STRUCTURE OF RECOMBINANT HUMAN INTERLEUKIN-22

• PDB DOI: https://doi.org/10.2210/pdb1M4R/pdb

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


• Deposited: 2002-07-03 Released: 2003-07-07 
• Deposition Author(s): Nagem, R.A.P., Colau, D., Dumoutier, L., Renauld, J.-C., Ogata, C., Polikarpov, I.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 
  0.220 (Depositor), 0.226 (DCC) 
• R-Value Work: 
  0.188 (Depositor), 0.195 (DCC) 
• R-Value Observed: 
  0.190 (Depositor) 

Literature

Crystal Structure of Recombinant Human Interleukin-22

Nagem, R.A.P., Colau, D., Dumoutier, L., Renauld, J.-C., Ogata, C., Polikarpov, I.

(2002) Structure 10: 1051-1062

• PubMed: 12176383 
• DOI: https://doi.org/10.1016/s0969-2126(02)00797-9
• Primary Citation Related Structures: 
  1M4R


• PubMed Abstract: 
  

  Interleukin-22 (IL-10-related T cell-derived inducible factor/IL-TIF/IL-22) is a novel cytokine belonging to the IL-10 family. Recombinant human IL-22 (hIL-22) was found to activate the signal transducers and activators of transcription factors 1 and 3 as well as acute phase reactants in several hepatoma cell lines, suggesting its involvement in the inflammatory response. The crystallographic structure of recombinant hIL-22 has been solved at 2.0 A resolution using the SIRAS method. Contrary to IL-10, the hIL-22 dimer does not present an interpenetration of the secondary-structure elements belonging to the two distinct polypeptide chains but results from interface interactions between monomers. Structural differences between these two cytokines, revealed by the crystallographic studies, clearly indicate that, while a homodimer of IL-10 is required for signaling, hIL-22 most probably interacts with its receptor as a monomer.

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Organizational Affiliation: 
• Laboratório Nacional de Luz Síncrotron, São Paulo, Brazil.

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 (software)

Macromolecule Content 

• Total Structure Weight: 34.31 kDa 
• Atom Count: 2,519 
• Modeled Residue Count: 283 
• Deposited Residue Count: 302 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Interleukin-22	A, B	151	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for Q9GZX6 (Homo sapiens) Explore Q9GZX6  Go to UniProtKB:  Q9GZX6
PHAROS:  Q9GZX6 GTEx:  ENSG00000127318

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free:  0.220 (Depositor), 0.226 (DCC) 
• R-Value Work:  0.188 (Depositor), 0.195 (DCC) 
• R-Value Observed: 0.190 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 55.43	α = 90
b = 61.61	β = 90
c = 73.47	γ = 90

Software Package:

Software Name	Purpose
MAR345	data collection
SCALEPACK	data scaling
SHARP	phasing
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2003-07-07 
Deposition Author(s): Nagem, R.A.P., Colau, D., Dumoutier, L., Renauld, J.-C., Ogata, C., Polikarpov, I.

Revision History  

• Version 1.0: 2003-07-07
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-10-11
  Changes: Refinement description
• Version 1.4: 2024-11-13
  Changes: Data collection, Database references, Structure summary