2WTD

Crystal structure of Chk2 in complex with an inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.2 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: 10.1016/j.bmc.2009.11.058
  • Primary Citation of Related Structures:  2WTC, 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-acti ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SERINE/THREONINE-PROTEIN KINASE CHK2
A
329Homo sapiensGene Names: CHEK2 (CDS1, CHK2, RAD53)
EC: 2.7.11.1
Find proteins for O96017 (Homo sapiens)
Go to Gene View: CHEK2
Go to UniProtKB:  O96017
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
ZZK
Query on ZZK

Download SDF File 
Download CCD File 
A
4-[2-AMINO-5-(1,3-BENZODIOXOL-4-YL)PYRIDIN-3-YL]BENZAMIDE
C19 H15 N3 O3
UBOGEBHIZSQBBD-UHFFFAOYSA-N
 Ligand Interaction
NO3
Query on NO3

Download SDF File 
Download CCD File 
A
NITRATE ION
N O3
NHNBFGGVMKEFGY-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
ZZKEC50: 10000 nM (100) BINDINGDB
ZZKIC50: 210 nM (100) BINDINGDB
ZZKIC50: 210 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.191 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 90.890α = 90.00
b = 90.890β = 90.00
c = 92.830γ = 120.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-12-29
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance