Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 60.21 kDa 
• Atom Count: 3912 
• Modelled Residue Count: 490 
• Deposited Residue Count: 528 
• Unique protein chains: 1

1SNX

CRYSTAL STRUCTURE OF APO INTERLEUKIN-2 TYROSINE KINASE CATALYTIC DOMAIN

• DOI: 10.2210/pdb1SNX/pdb

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


• Deposited: 2004-03-12 Released: 2004-07-20 
• Deposition Author(s): Brown, K., Long, J.M., Vial, S.C., Dedi, N., Dunster, N.J., Renwick, S.B., Tanner, A.J., Frantz, J.D., Fleming, M.A., Cheetham, G.M.T.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free: 0.296 
• R-Value Work: 0.241 
• R-Value Observed: 0.252 

Literature

Crystal structures of interleukin-2 tyrosine kinase and their implications for the design of selective inhibitors.

Brown, K., Long, J.M., Vial, S.C., Dedi, N., Dunster, N.J., Renwick, S.B., Tanner, A.J., Frantz, J.D., Fleming, M.A., Cheetham, G.M.

(2004) J Biol Chem 279: 18727-18732

• PubMed: 14766749 
• DOI: 10.1074/jbc.M400031200
• Primary Citation of Related Structures:  
  1SM2, 1SNX, 1SNU


• PubMed Abstract: 
  

Interleukin-2 tyrosine kinase, Itk, is an important member of the Tec family of non-receptor tyrosine kinases that play a central role in signaling through antigen receptors such as the T-cell receptor, B-cell receptor, and Fcepsilon. Selective inhibition of Itk may be an important way of modulating many diseases involving heightened or inappropriate activation of the immune system. In addition to an unliganded nonphophorylated Itk catalytic kinase domain, we determined the crystal structures of the phosphorylated and nonphosphorylated kinase domain bound to staurosporine, a potent broad-spectrum kinase inhibitor. These structures are useful for the design of novel, highly potent and selective Itk inhibitors and provide insight into the influence of inhibitor binding and phosphorylation on the conformation of Itk.

---

Organizational Affiliation: 

Vertex Pharmaceuticals (Europe) Ltd., 88 Milton Park, Abingdon, Oxfordshire OX14 4RY, United Kingdom.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Tyrosine-protein kinase ITK/TSK	A, B	264	Homo sapiens	Mutation(s): 0  Gene Names: ITK, LYK, EMT EC: 2.7.1.112 (PDB Primary Data), 2.7.10.2 (UniProt)
Find proteins for Q08881 (Homo sapiens) Explore Q08881  Go to UniProtKB:  Q08881
NIH Common Fund Data Resources
PHAROS:  Q08881 GTEx:  ENSG00000113263

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free: 0.296 
• R-Value Work: 0.241 
• R-Value Observed: 0.252 
• Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 39.5	α = 92.5
b = 54.9	β = 85.5
c = 59.2	γ = 74

Software Package:

Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
AMoRE	phasing
CNX	refinement
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-03-12 
• Released Date: 2004-07-20 
Deposition Author(s): Brown, K., Long, J.M., Vial, S.C., Dedi, N., Dunster, N.J., Renwick, S.B., Tanner, A.J., Frantz, J.D., Fleming, M.A., Cheetham, G.M.T.

Revision History  

• Version 1.0: 2004-07-20
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance