2XM8

Co-crystal structure of a small molecule inhibitor bound to the kinase domain of Chk2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.40 Å
  • R-Value Free: 0.323 
  • R-Value Work: 0.263 
  • R-Value Observed: 0.266 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure-Based Design of Potent and Selective 2-(Quinazolin-2-Yl)Phenol Inhibitors of Checkpoint Kinase 2.

Caldwell, J.J.Welsh, E.J.Matijssen, C.Anderson, V.E.Antoni, L.Boxall, K.Urban, F.Hayes, A.Raynaud, F.I.Rigoreau, L.J.Raynham, T.Aherne, G.W.Pearl, L.H.Oliver, A.W.Garrett, M.D.Collins, I.

(2011) J Med Chem 54: 580

  • DOI: 10.1021/jm101150b
  • Primary Citation of Related Structures:  
    2XBJ, 2XM8, 2XM9

  • PubMed Abstract: 
  • Structure-based design was applied to the optimization of a series of 2-(quinazolin-2-yl)phenols to generate potent and selective ATP-competitive inhibitors of the DNA damage response signaling enzyme checkpoint kinase 2 (CHK2). Structure-activity re ...

    Structure-based design was applied to the optimization of a series of 2-(quinazolin-2-yl)phenols to generate potent and selective ATP-competitive inhibitors of the DNA damage response signaling enzyme checkpoint kinase 2 (CHK2). Structure-activity relationships for multiple substituent positions were optimized separately and in combination leading to the 2-(quinazolin-2-yl)phenol 46 (IC(50) 3 nM) with good selectivity for CHK2 against CHK1 and a wider panel of kinases and with promising in vitro ADMET properties. Off-target activity at hERG ion channels shown by the core scaffold was successfully reduced by the addition of peripheral polar substitution. In addition to showing mechanistic inhibition of CHK2 in HT29 human colon cancer cells, a concentration dependent radioprotective effect in mouse thymocytes was demonstrated for the potent inhibitor 46 (CCT241533).


    Organizational Affiliation

    Cancer Research UK Cancer Therapeutics Unit, The Institute of Cancer Research, 15 Cotswold Road, Sutton, Surrey SM2 5NG, UK. john.caldwell@icr.ac.uk



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SERINE/THREONINE-PROTEIN KINASE CHK2A329Homo sapiensMutation(s): 0 
Gene Names: CHEK2CDS1CHK2RAD53
EC: 2.7.11.1
Find proteins for O96017 (Homo sapiens)
Explore O96017 
Go to UniProtKB:  O96017
NIH Common Fund Data Resources
PHAROS  O96017
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
B4W
Query on B4W

Download CCD File 
A
2-{4-[(3S)-PYRROLIDIN-3-YLAMINO]QUINAZOLIN-2-YL}PHENOL
C18 H18 N4 O
XVURFLCQTYKQLW-LBPRGKRZSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
B4WIC50 :  160   nM  PDBBind
B4WIC50:  160   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.40 Å
  • R-Value Free: 0.323 
  • R-Value Work: 0.263 
  • R-Value Observed: 0.266 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 90.11α = 90
b = 90.11β = 90
c = 91.07γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
iMOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-01-12
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance