4L7S

Kinase domain mutant of human Itk in complex with an aminobenzothiazole inhibitor

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.03 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.174 

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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history. 


Literature

Identification of a Novel and Selective Series of Itk Inhibitors via a Template-Hopping Strategy.

Alder, C.M., Ambler, M., Campbell, A.J., Champigny, A.C., Deakin, A.M., Harling, J.D., Harris, C.A., Longstaff, T., Lynn, S., Maxwell, A.C., Mooney, C.J., Scullion, C., Singh, O.M., Smith, I.E., Somers, D.O., Tame, C.J., Wayne, G., Wilson, C., Woolven, J.M.

(2013) ACS Med Chem Lett 4: 948-952

  • DOI: 10.1021/ml400206q
  • Primary Citation of Related Structures:  
    4L7S

  • PubMed Abstract: 

    • Inhibition of Itk potentially constitutes a novel, nonsteroidal treatment for asthma and other T-cell mediated diseases. In-house kinase cross-screening resulted in the identification of an aminopyrazole-based series of Itk inhibitors. Initial work on this series highlighted selectivity issues with several other kinases, particularly AurA and AurB ...

    Inhibition of Itk potentially constitutes a novel, nonsteroidal treatment for asthma and other T-cell mediated diseases. In-house kinase cross-screening resulted in the identification of an aminopyrazole-based series of Itk inhibitors. Initial work on this series highlighted selectivity issues with several other kinases, particularly AurA and AurB. A template-hopping strategy was used to identify a series of aminobenzothiazole Itk inhibitors, which utilized an inherently more selective hinge binding motif. Crystallography and modeling were used to rationalize the observed selectivity. Initial exploration of the SAR around this series identified potent Itk inhibitors in both enzyme and cellular assays.

    Organizational Affiliation: 

    Respiratory Therapy Area Unit, GlaxoSmithKline Pharmaceuticals , Medicines Research Centre, Gunnels Wood Road, Stevenage, SG1 2NY, U.K.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Tyrosine-protein kinase ITK/TSKA, B266Homo sapiensMutation(s): 1 
Gene Names: ITK, EMT, LYK
EC: 2.7.10.2
UniProt & NIH Common Fund Data Resources
Find proteins for Q08881 (Homo sapiens)
Explore Q08881 
Go to UniProtKB:  Q08881
PHAROS:  Q08881
GTEx:  ENSG00000113263 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ08881
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
G7K
Query on G7K
Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]		trans-4-({4-[difluoro(4-fluorophenyl)methyl]-6-[(5-methoxy[1,3]thiazolo[5,4-b]pyridin-2-yl)amino]pyrimidin-2-yl}amino)cyclohexanol
C24 H23 F3 N6 O2 S
PFDUFECOJKSDAT-WKILWMFISA-N		 Ligand Interaction
SO4
Query on SO4
Download Ideal Coordinates CCD File 
E [auth B]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
G7K BindingDB:  4L7S Ki: 16 (nM) from 1 assay(s)
Binding MOAD:  4L7S Ki: 15.8 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.03 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.174 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 146.857α = 90
b = 69.523β = 108.18
c = 68.617γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
REFMACphasing

Structure Validation

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Ligand Structure Quality Assessment 


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Entry History 

Deposition Data

  • Deposited Date: 2013-06-14 
  • Released Date: 2014-01-22 
    • Deposition Author(s): Somers, D.O.

Revision History  (Full details and data files)

  • Version 1.0: 2014-01-22
    Type: Initial release
  • Version 1.1: 2014-09-24
    Changes: Database references