Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 36.15 kDa 
• Atom Count: 2367 
• Modelled Residue Count: 286 
• Deposited Residue Count: 315 
• Unique protein chains: 1

3PJC

Crystal structure of JAK3 complexed with a potent ATP site inhibitor showing high selectivity within the Janus kinase family

• DOI: 10.2210/pdb3PJC/pdb

• Classification: TRANSFERASE/TRANSFERASE INHIBITOR
• Organism(s): Homo sapiens
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2010-11-09 Released: 2010-12-29 
• Deposition Author(s): Tavares, G.A., Thoma, G., Zerwes, H.-G., Kroemer, M.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.215 
• R-Value Work: 0.180 
• R-Value Observed: 0.182 

Literature

Identification of a Potent Janus Kinase 3 Inhibitor with High Selectivity within the Janus Kinase Family.

Thoma, G., Nuninger, F., Falchetto, R., Hermes, E., Tavares, G.A., Vangrevelinghe, E., Zerwes, H.G.

(2011) J Med Chem 54: 284-288

• PubMed: 21155605 
• DOI: 10.1021/jm101157q
• Primary Citation of Related Structures:  
  3PJC


• PubMed Abstract: 
  

We describe a synthetic approach toward the rapid modification of phenyl-indolyl maleimides and the discovery of potent Jak3 inhibitor 1 with high selectivity within the Jak kinase family. We provide a rationale for this unprecedented selectivity based on the X-ray crystal structure of an analogue of 1 bound to the ATP-binding site of Jak3. While equally potent compared to the Pfizer pan Jak inhibitor CP-690,550 (2) in an enzymatic Jak3 assay, compound 1 was found to be 20-fold less potent in cellular assays measuring cytokine-triggered signaling through cytokine receptors containing the common γ chain (γC). Contrary to compound 1, compound 2 inhibited Jak1 in addition to Jak3. Permeability and cellular concentrations of compounds 1 and 2 were similar. As Jak3 always cooperates with Jak1 for signaling, we speculate that specific inhibition of Jak3 is not sufficient to efficiently block γC cytokine signal transduction required for strong immunosuppression.

---

Organizational Affiliation: 

Novartis Institutes for BioMedical Research, Forum 1, Novartis Campus, Basel, Switzerland. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Tyrosine-protein kinase JAK3	A	315	Homo sapiens	Mutation(s): 0  Gene Names: JAK3 EC: 2.7.10.2
Find proteins for P52333 (Homo sapiens) Explore P52333  Go to UniProtKB:  P52333
NIH Common Fund Data Resources
PHAROS:  P52333 GTEx:  ENSG00000105639

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PJC	A	3-(1H-indol-3-yl)-4-[2-(4-oxopiperidin-1-yl)-5-(trifluoromethyl)pyrimidin-4-yl]-1H-pyrrole-2,5-dione C22 H16 F3 N5 O3 MYIILBMNTUDZDH-UHFFFAOYSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
PJC	IC50 :  27   nM  PDBBind
PJC	IC50:  27   nM  Binding MOAD
PJC	IC50:  27   nM  BindingDB

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.215 
• R-Value Work: 0.180 
• R-Value Observed: 0.182 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 41.722	α = 90
b = 71.991	β = 90
c = 107.8	γ = 90

Software Package:

Software Name	Purpose
PHASER	phasing
BUSTER	refinement
XDS	data reduction
XSCALE	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-11-09 
• Released Date: 2010-12-29 
Deposition Author(s): Tavares, G.A., Thoma, G., Zerwes, H.-G., Kroemer, M.

Revision History  

• Version 1.0: 2010-12-29
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2011-09-28
  Changes: Database references