2WTI

CRYSTAL STRUCTURE OF CHK2 IN COMPLEX WITH AN INHIBITOR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 

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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Identification and Characterisation of 2-Aminopyridine Inhibitors of Checkpoint Kinase 2

Hilton, S.Naud, S.Caldwell, J.J.Boxall, K.Burns, S.Anderson, V.E.Antoni, L.Allen, C.E.Pearl, L.H.Oliver, A.W.Aherne, G.W.Garrett, M.D.Collins, I.

(2010) Bioorg Med Chem 18: 707

  • DOI: https://doi.org/10.1016/j.bmc.2009.11.058
  • Primary Citation of Related Structures:  
    2WTC, 2WTD, 2WTI, 2WTJ

  • PubMed Abstract: 

    5-(Hetero)aryl-3-(4-carboxamidophenyl)-2-aminopyridine inhibitors of CHK2 were identified from high throughput screening of a kinase-focussed compound library. Rapid exploration of the hits through straightforward chemistry established structure-activity relationships and a proposed ATP-competitive binding mode which was verified by X-ray crystallography of several analogues bound to CHK2. Variation of the 5-(hetero)aryl substituent identified bicyclic dioxolane and dioxane groups which improved the affinity and the selectivity of the compounds for CHK2 versus CHK1. The 3-(4-carboxamidophenyl) substituent could be successfully replaced by acyclic omega-aminoalkylamides, which made additional polar interactions within the binding site and led to more potent inhibitors of CHK2. Compounds from this series showed activity in cell-based mechanistic assays for inhibition of CHK2.


  • Organizational Affiliation

    Cancer Research UK Centre for Cancer Therapeutics, The Institute of Cancer Research, 15 Cotswold Road, Sutton, Surrey SM2 5NG, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CHECKPOINT KINASE 2329Homo sapiensMutation(s): 0 
EC: 2.7.11.1
UniProt & NIH Common Fund Data Resources
Find proteins for O96017 (Homo sapiens)
Explore O96017 
Go to UniProtKB:  O96017
GTEx:  ENSG00000183765 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO96017
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
WTI Binding MOAD:  2WTI IC50: 92 (nM) from 1 assay(s)
BindingDB:  2WTI IC50: 92 (nM) from 1 assay(s)
EC50: 5000 (nM) from 1 assay(s)
PDBBind:  2WTI IC50: 92 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 90.87α = 90
b = 90.87β = 90
c = 92.92γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2009-12-29
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-12-20
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description