3PJC

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.180 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

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

  • DOI: 10.1021/jm101157q

  • 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 bas ...

    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. gebhard.thoma@novartis.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tyrosine-protein kinase JAK3
A
315Homo sapiensMutation(s): 0 
Gene Names: JAK3
EC: 2.7.10.2
Find proteins for P52333 (Homo sapiens)
Go to Gene View: JAK3
Go to UniProtKB:  P52333
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PJC
Query on PJC

Download SDF File 
Download CCD File 
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
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
PJCIC50: 27 nM (100) BINDINGDB
PJCIC50: 27 nM BINDINGMOAD
PJCIC50: 27 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.180 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 41.722α = 90.00
b = 71.991β = 90.00
c = 107.800γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
BUSTERrefinement
XSCALEdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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