2HOG

crystal structure of Chek1 in complex with inhibitor 20


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

3-(Indol-2-yl)indazoles as Chek1 kinase inhibitors: Optimization of potency and selectivity via substitution at C6.

Fraley, M.E.Steen, J.T.Brnardic, E.J.Arrington, K.L.Spencer, K.L.Hanney, B.A.Kim, Y.Hartman, G.D.Stirdivant, S.M.Drakas, B.A.Rickert, K.Walsh, E.S.Hamilton, K.Buser, C.A.Hardwick, J.Tao, W.Beck, S.C.Mao, X.Lobell, R.B.Sepp-Lorenzino, L.Yan, Y.Ikuta, M.Munshi, S.K.Kuo, L.C.Kreatsoulas, C.

(2006) Bioorg.Med.Chem.Lett. 16: 6049-6053

  • DOI: 10.1016/j.bmcl.2006.08.118

  • PubMed Abstract: 
  • The development of 3-(indol-2-yl)indazoles as inhibitors of Chek1 kinase is described. Introduction of amides and heteroaryl groups at the C6 position of the indazole ring system provided sufficient Chek1 potency and selectivity over Cdk7 to permit e ...

    The development of 3-(indol-2-yl)indazoles as inhibitors of Chek1 kinase is described. Introduction of amides and heteroaryl groups at the C6 position of the indazole ring system provided sufficient Chek1 potency and selectivity over Cdk7 to permit escape from DNA damage-induced arrest in a cellular assay. Enzyme potency against Chek1 was optimized by the incorporation of a hydroxymethyl triazole moiety in compound 21 (Chek1 IC(50)=0.30nM) that was shown by X-ray crystallography to displace one of three highly conserved water molecules in the HI region of the ATP-binding cleft.


    Organizational Affiliation

    Department of Medicinal Chemistry, Merck Research Laboratories, West Point, PA 19486, USA. alee7@prdus.jnj.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein kinase Chk1
A
322Homo sapiensGene 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
710
Query on 710

Download SDF File 
Download CCD File 
A
(5-{3-[5-(PIPERIDIN-1-YLMETHYL)-1H-INDOL-2-YL]-1H-INDAZOL-6-YL}-2H-1,2,3-TRIAZOL-4-YL)METHANOL
C24 H25 N7 O
FNWHPLLNMLOZTL-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
710IC50: 0.3 nM BINDINGMOAD
710IC50: 0.3 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.204 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 44.970α = 90.00
b = 65.530β = 94.20
c = 58.400γ = 90.00
Software Package:
Software NamePurpose
d*TREKdata scaling
CNSphasing
d*TREKdata reduction
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2006-07-14 
  • Released Date: 2007-04-24 
  • Deposition Author(s): Yan, Y., Ikuta, M.

Revision History 

  • Version 1.0: 2007-04-24
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance