2WMS

Crystal structure of checkpoint kinase 1 (Chk1) in complex with inhibitors

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.225 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

Identification of Inhibitors of Checkpoint Kinase 1 Through Template Screening.

Matthews, T.P., Klair, S., Burns, S., Boxall, K., Cherry, M., Fisher, M., Westwood, I.M., Walton, M.I., Mchardy, T., Cheung, K.-M.J., Van Montfort, R., Williams, D., Aherne, G.W., Garrett, M.D., Reader, J., Collins, I.

(2009) J Med Chem 52: 4810

  • DOI: 10.1021/jm900314j
  • Primary Citation of Related Structures:  
    2WMX, 2WMQ, 2WMR, 2WMS, 2WMT, 2WMU, 2WMV, 2WMW

  • PubMed Abstract: 

    • Checkpoint kinase 1 (CHK1) is an oncology target of significant current interest. Inhibition of CHK1 abrogates DNA damage-induced cell cycle checkpoints and sensitizes p53 deficient cancer cells to genotoxic therapies. Using template screening, a fragmen ...

    Checkpoint kinase 1 (CHK1) is an oncology target of significant current interest. Inhibition of CHK1 abrogates DNA damage-induced cell cycle checkpoints and sensitizes p53 deficient cancer cells to genotoxic therapies. Using template screening, a fragment-based approach to small molecule hit generation, we have identified multiple CHK1 inhibitor scaffolds suitable for further optimization. The sequential combination of in silico low molecular weight template selection, a high concentration biochemical assay and hit validation through protein-ligand X-ray crystallography provided 13 template hits from an initial in silico screening library of ca. 15000 compounds. The use of appropriate counter-screening to rule out nonspecific aggregation by test compounds was essential for optimum performance of the high concentration bioassay. One low molecular weight, weakly active purine template hit was progressed by iterative structure-based design to give submicromolar pyrazolopyridines with good ligand efficiency and appropriate CHK1-mediated cellular activity in HT29 colon cancer cells.

    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)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SERINE/THREONINE-PROTEIN KINASE CHK1 A289Homo sapiensMutation(s): 0 
Gene Names: CHEK1, CHK1
EC: 2.7.11.1
Find proteins for O14757 (Homo sapiens)
Explore O14757 
Go to UniProtKB:  O14757
NIH Common Fund Data Resources
PHAROS:  O14757
GTEx:  ENSG00000149554
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZYS
Query on ZYS
Download Ideal Coordinates CCD File 
A
[4-amino-2-(tert-butylamino)-1,3-thiazol-5-yl](phenyl)methanone
C14 H17 N3 O S
KEHNGAHNKVLUSC-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.225 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.73α = 90
b = 65.27β = 101.68
c = 54.17γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-07-28
    Type: Initial release
  • Version 1.1: 2011-10-12
    Changes: Database references, Derived calculations, Non-polymer description, Other, Refinement description, Version format compliance
  • Version 1.2: 2017-06-28
    Changes: Data collection