2R0U

Crystal Structure of Chek1 in Complex with Inhibitor 54

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history. 

Literature

Synthesis and evaluation of substituted benzoisoquinolinones as potent inhibitors of Chk1 kinase.

Garbaccio, R.M., Huang, S., Tasber, E.S., Fraley, M.E., Yan, Y., Munshi, S., Ikuta, M., Kuo, L., Kreatsoulas, C., Stirdivant, S., Drakas, B., Rickert, K., Walsh, E.S., Hamilton, K.A., Buser, C.A., Hardwick, J., Mao, X., Beck, S.C., Abrams, M.T., Tao, W., Lobell, R., Sepp-Lorenzino, L., Hartman, G.D.

(2007) Bioorg.Med.Chem.Lett. 17: 6280-6285

  • DOI: 10.1016/j.bmcl.2007.09.007

  • PubMed Abstract: 

    • From HTS lead 1, a novel benzoisoquinolinone class of ATP-competitive Chk1 inhibitors was devised and synthesized via a photochemical route. Using X-ray crystallography as a guide, potency was rapidly enhanced through the installation of a tethered b ...

    From HTS lead 1, a novel benzoisoquinolinone class of ATP-competitive Chk1 inhibitors was devised and synthesized via a photochemical route. Using X-ray crystallography as a guide, potency was rapidly enhanced through the installation of a tethered basic amine designed to interact with an acidic residue (Glu91) in the enzyme pocket. Further SAR was explored at the solvent front and near to the H1 pocket and resulted in the discovery of low MW, sub-nanomolar inhibitors of Chk1.

    Organizational Affiliation: 

    Department of Medicinal Chemistry, Merck Research Laboratories, West Point, PA 19486, USA. robert_garbaccio@merck.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein kinase Chk1
A
323Homo 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
M54
Query on M54
Download SDF File 
Download CCD File 
A
6-(3-aminopropyl)-4-(3-hydroxyphenyl)-9-(1H-pyrazol-4-yl)benzo[h]isoquinolin-1(2H)-one
C25 H22 N4 O2
BUSJQQYKXHYDNN-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
M54IC50: 1 nM (100) BINDINGDB
M54IC50: 1 nM BINDINGMOAD
M54IC50: 1 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.195 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 45.260α = 90.00
b = 65.540β = 94.27
c = 58.500γ = 90.00
Software Package:
Software NamePurpose
CrystalCleardata collection
d*TREKdata scaling
CNSphasing
d*TREKdata reduction
BUSTER-TNTrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

  • Deposited Date: 2007-08-21 
  • Released Date: 2007-10-30 
  • Deposition Author(s): Yan, Y., Ikuta, M.

Revision History 

  • Version 1.0: 2007-10-30
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance