Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 18610.30 
• Atom Count: 1227 
• Residue Count: 159 
• Unique protein chains: 1

1N1F

Crystal Structure of Human Interleukin-19

• DOI: 10.2210/pdb1N1F/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens
• Expression System: Drosophila melanogaster


• Deposited: 2002-10-17 Released: 2003-02-04 
• Deposition Author(s): Chang, C., Magracheva, E., Kozlov, S., Fong, S., Tobin, G., Kotenko, S., Wlodawer, A., Zdanov, A.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.243 
• R-Value Work: 0.156 

Literature

Crystal structure of interleukin-19 defines a new subfamily of helical cytokines

Chang, C., Magracheva, E., Kozlov, S., Fong, S., Tobin, G., Kotenko, S., Wlodawer, A., Zdanov, A.

(2003) J.Biol.Chem. 278: 3308-3313

• PubMed: 12403790 
• DOI: 10.1074/jbc.M208602200


• PubMed Abstract: 
  

Interleukin-19 (IL-19) is a novel cytokine that was initially identified during a sequence data base search aimed at finding potential IL-10 homologs. IL-19 shares a receptor complex with IL-20, indicating that the biological activities of these two cytokines overlap and that both may play an important role in regulating development and proper functioning of the skin. We determined the crystal structure of human recombinant IL-19 and refined it at 1.95-A resolution to an R-factor of 0.157. Unlike IL-10, which forms an intercalated dimer, the molecule of IL-19 is a monomer made of seven amphipathic helices, A-G, creating a unique helical bundle. On the basis of the observed structure, we propose that IL-19, IL-20, and other putative members of the proposed IL-10 family together form a distinct subfamily of helical cytokines.

---

Organizational Affiliation: 

Protein Structure Section, Macromolecular Crystallography Laboratory, Center for Cancer Research, National Cancer Institute-Frederick, National Institutes of Health, Maryland 21702-1201, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
interleukin-19	A	159	Homo sapiens	Mutation(s): 0  Gene Names: IL19 (ZMDA1)
Find proteins for Q9UHD0 (Homo sapiens) Go to Gene View: IL19 Go to UniProtKB:  Q9UHD0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
NAG	A	N-ACETYL-D-GLUCOSAMINE C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.243 
• R-Value Work: 0.156 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 30.657	α = 90.00
b = 52.974	β = 90.00
c = 93.474	γ = 90.00

Software Package:

Software Name	Purpose
DENZO	data reduction
CNS	refinement
SCALEPACK	data scaling
SOLVE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-10-17 
• Released Date: 2003-02-04 
• Deposition Author(s): Chang, C., Magracheva, E., Kozlov, S., Fong, S., Tobin, G., Kotenko, S., Wlodawer, A., Zdanov, A.

Revision History 

• Version 1.0: 2003-02-04
  Type: Initial release
• Version 1.1: 2008-04-28
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Non-polymer description, Version format compliance