2WMV

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.009 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.214 

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:  
  • Also Cited By: 2YM8, 2YM7, 2YM6, 2YM5, 2YM4, 2YM3, 2XF0, 2XEZ, 2XEY

  • 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 fra ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SERINE/THREONINE-PROTEIN KINASE CHK1
A
289Homo sapiensMutation(s): 0 
Gene Names: CHEK1 (CHK1)
EC: 2.7.11.1
Find proteins for O14757 (Homo sapiens)
Go to Gene View: CHEK1
Go to UniProtKB:  O14757
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZYV
Query on ZYV

Download SDF File 
Download CCD File 
A
1-[(2S)-4-(7H-PURIN-6-YL)MORPHOLIN-2-YL]METHANAMINE
(4-(9H-PURIN-6-YL)MORPHOLIN-2-YL)METHANAMINE
C10 H14 N6 O
VNGSDLIBIYNHKQ-ZETCQYMHSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
ZYVIC50: 9200 nM (100) BINDINGDB
ZYVIC50: 9200 nM BINDINGMOAD
ZYVIC50: 9200 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.009 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.214 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 44.630α = 90.00
b = 64.910β = 100.76
c = 53.350γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
PHASERphasing
SCALAdata scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

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