4I6Q

JAK3 kinase domain in complex with 2-Phenoxy-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((S)-1-cyclopropyl-ethyl)-amide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.196 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Discovery of a series of novel 5H-pyrrolo[2,3-b]pyrazine-2-phenyl ethers, as potent JAK3 kinase inhibitors.

Jaime-Figueroa, S.De Vicente, J.Hermann, J.Jahangir, A.Jin, S.Kuglstatter, A.Lynch, S.M.Menke, J.Niu, L.Patel, V.Shao, A.Soth, M.Vu, M.D.Yee, C.

(2013) Bioorg.Med.Chem.Lett. 23: 2522-2526

  • DOI: 10.1016/j.bmcl.2013.03.015
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • We report the discovery of a novel series of ATP-competitive Janus kinase 3 (JAK3) inhibitors based on the 5H-pyrrolo[2,3-b]pyrazine scaffold. The initial leads in this series, compounds 1a and 1h, showed promising potencies, but a lack of selectivit ...

    We report the discovery of a novel series of ATP-competitive Janus kinase 3 (JAK3) inhibitors based on the 5H-pyrrolo[2,3-b]pyrazine scaffold. The initial leads in this series, compounds 1a and 1h, showed promising potencies, but a lack of selectivity against other isoforms in the JAK family. Computational and crystallographic analysis suggested that the phenyl ether moiety possessed a favorable vector to achieve selectivity. Exploration of this vector resulted in the identification of 12b and 12d, as potent JAK3 inhibitors, demonstrating improved JAK family and kinase selectivity.


    Organizational Affiliation

    Hoffmann-La Roche Inc., pRED, Pharma Research & Early Development, Small Molecule Research, Discovery Chemistry, 340 Kingsland Street, Nutley, NJ 07110-1199, USA. saul.jaime@roche.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tyrosine-protein kinase JAK3
A
314Homo sapiensMutation(s): 2 
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 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
1DT
Query on 1DT

Download SDF File 
Download CCD File 
A
N-[(1S)-1-cyclopropylethyl]-2-phenoxy-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide
C18 H18 N4 O2
TUNBOTWJAARGCJ-NSHDSACASA-N
 Ligand Interaction
PHU
Query on PHU

Download SDF File 
Download CCD File 
A
1-phenylurea
Phenylurea
C7 H8 N2 O
LUBJCRLGQSPQNN-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
1DTIC50: 30 nM (99) BINDINGDB
1DTIC50: 30 nM BINDINGMOAD
1DTIC50: 30 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.196 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 46.874α = 90.00
b = 75.646β = 90.00
c = 89.270γ = 90.00
Software Package:
Software NamePurpose
ADSCdata collection
HKL-2000data scaling
HKL-2000data reduction
REFMACrefinement
REFMACphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-10-16
    Type: Initial release