4QT1

JAK3 kinase domain in complex with 1-[(3S)-1-isobutylsulfonyl-3-piperidyl]-3-(5H-pyrrolo[2,3-b]pyrazin-2-yl)urea

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.210 

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Literature

Scaffold hopping towards potent and selective JAK3 inhibitors: discovery of novel C-5 substituted pyrrolopyrazines

De Vicente, J., Lemoine, R., Bartlett, M., Hermann, J.C., Hekmat-Nejad, M., Henningsen, R., Jin, S., Kuglstatter, A., Li, H., Lovey, A.J., Menke, J., Niu, L., Patel, V., Petersen, A., Setti, L., Shao, A., Tivitmahaisoon, P., Vu, M.D., Soth, M.

(2014) Bioorg Med Chem Lett 24: 4969-4975

  • DOI: https://doi.org/10.1016/j.bmcl.2014.09.031
  • Primary Citation of Related Structures:  
    4QT1

  • PubMed Abstract: 

    • The discovery of a novel series of pyrrolopyrazines as JAK inhibitors with comparable enzyme and cellular activity to tofacitinib is described. The series was identified using a scaffold hopping approach aided by structure based drug design using principles of intramolecular hydrogen bonding for conformational restriction and targeting specific pockets for modulating kinase activity ...

    The discovery of a novel series of pyrrolopyrazines as JAK inhibitors with comparable enzyme and cellular activity to tofacitinib is described. The series was identified using a scaffold hopping approach aided by structure based drug design using principles of intramolecular hydrogen bonding for conformational restriction and targeting specific pockets for modulating kinase activity.

    Organizational Affiliation: 

    Small Molecule Research, Pharma Research & Early Development, pRED, Hoffmann-La Roche Inc., 340 Kingsland Street, Nutley, NJ 07110, United States.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Tyrosine-protein kinase JAK3A314Homo sapiensMutation(s): 2 
Gene Names: JAK3
EC: 2.7.10.2
UniProt & NIH Common Fund Data Resources
Find proteins for P52333 (Homo sapiens)
Explore P52333 
Go to UniProtKB:  P52333
PHAROS:  P52333
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP52333
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
3C9
Query on 3C9
Download Ideal Coordinates CCD File 
B [auth A]1-{(3S)-1-[(2-methylpropyl)sulfonyl]piperidin-3-yl}-3-(5H-pyrrolo[2,3-b]pyrazin-2-yl)urea
C16 H24 N6 O3 S
UTTDMGAEOAWZGU-LBPRGKRZSA-N		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
3C9 BindingDB:  4QT1 IC50: 7 (nM) from 1 assay(s)
Binding MOAD:  4QT1 IC50: 7 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.210 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.921α = 90
b = 75.703β = 90
c = 89.729γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
REFMACphasing

Structure Validation

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Ligand Structure Quality Assessment 


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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-05-27
    Type: Initial release