3F9N

Crystal structure of chk1 kinase in complex with inhibitor 38


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Development of thioquinazolinones, allosteric Chk1 kinase inhibitors.

Converso, A.Hartingh, T.Garbaccio, R.M.Tasber, E.Rickert, K.Fraley, M.E.Yan, Y.Kreatsoulas, C.Stirdivant, S.Drakas, B.Walsh, E.S.Hamilton, K.Buser, C.A.Mao, X.Abrams, M.T.Beck, S.C.Tao, W.Lobell, R.Sepp-Lorenzino, L.Zugay-Murphy, J.Sardana, V.Munshi, S.K.Jezequel-Sur, S.M.Zuck, P.D.Hartman, G.D.

(2009) Bioorg.Med.Chem.Lett. 19: 1240-1244

  • DOI: 10.1016/j.bmcl.2008.12.076

  • PubMed Abstract: 
  • A high throughput screening campaign was designed to identify allosteric inhibitors of Chk1 kinase by testing compounds at high concentration. Activity was then observed at K(m) for ATP and at near-physiological concentrations of ATP. This strategy l ...

    A high throughput screening campaign was designed to identify allosteric inhibitors of Chk1 kinase by testing compounds at high concentration. Activity was then observed at K(m) for ATP and at near-physiological concentrations of ATP. This strategy led to the discovery of a non-ATP competitive thioquinazolinone series which was optimized for potency and stability. An X-ray crystal structure for the complex of our best inhibitor bound to Chk1 was solved, indicating that it binds to an allosteric site approximately 13A from the ATP binding site. Preliminary data is presented for several of these compounds.


    Organizational Affiliation

    Department of Medicinal Chemistry, Merck Research Laboratories, Merck & Co., PO Box 4, West Point, PA 19486, USA. antonella_converso@merck.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein kinase Chk1
A
322Homo 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 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
38M
Query on 38M

Download SDF File 
Download CCD File 
A
3-(3-chlorophenyl)-2-({(1S)-1-[(6S)-2,8-diazaspiro[5.5]undec-2-ylcarbonyl]pentyl}sulfanyl)quinazolin-4(3H)-one
C29 H35 Cl N4 O2 S
GMBUMIBZLYNLLU-SVEHJYQDSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
38MIC50: 1300 nM BINDINGMOAD
38MIC50: 1300 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.182 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 45.060α = 90.00
b = 65.750β = 96.24
c = 58.410γ = 90.00
Software Package:
Software NamePurpose
CrystalCleardata collection
BUSTER-TNTphasing
HKL-2000data reduction
HKL-2000data scaling
BUSTER-TNTrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-01-20
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance