3TKH

Crystal structure of Chk1 in complex with inhibitor S01


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.79 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.183 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Pyridyl aminothiazoles as potent inhibitors of Chk1 with slow dissociation rates.

Dudkin, V.Y.Rickert, K.Kreatsoulas, C.Wang, C.Arrington, K.L.Fraley, M.E.Hartman, G.D.Yan, Y.Ikuta, M.Stirdivant, S.M.Drakas, R.A.Walsh, E.S.Hamilton, K.Buser, C.A.Lobell, R.B.Sepp-Lorenzino, L.

(2012) Bioorg.Med.Chem.Lett. 22: 2609-2612

  • DOI: 10.1016/j.bmcl.2012.01.110
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Pyridyl aminothiazoles comprise a novel class of ATP-competitive Chk1 inhibitors with excellent inhibitory potential. Modification of the core with ethylenediamine amides provides compounds with low picomolar potency and very high residence times. In ...

    Pyridyl aminothiazoles comprise a novel class of ATP-competitive Chk1 inhibitors with excellent inhibitory potential. Modification of the core with ethylenediamine amides provides compounds with low picomolar potency and very high residence times. Investigation of binding parameters of such compounds using X-ray crystallography and molecular dynamics simulations revealed multiple hydrogen bonds to the enzyme backbone as well as stabilization of the conserved water molecules network in the hydrophobic binding region.


    Organizational Affiliation

    Department of Medicinal Chemistry, Merck Research Laboratories, West Point, PA 19486, USA. vadim_dudkin@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 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
07S
Query on 07S

Download SDF File 
Download CCD File 
A
1-(morpholin-4-yl)-2-[4-(2-{[5-(pyridin-3-yl)-1,3-thiazol-2-yl]amino}pyridin-4-yl)piperazin-1-yl]ethanone
C23 H27 N7 O2 S
QCBHCZCWZWNPGE-UHFFFAOYSA-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 %)
07SIC50: 47 nM (100) BINDINGDB
07SIC50: 47 nM BINDINGMOAD
07SIC50: 47 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.79 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.183 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 45.091α = 90.00
b = 65.413β = 94.80
c = 57.821γ = 90.00
Software Package:
Software NamePurpose
d*TREKdata scaling
CrystalCleardata collection
d*TREKdata reduction
BUSTERrefinement
CNSphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2011-08-26 
  • Released Date: 2012-04-11 
  • Deposition Author(s): Yan, Y., Ikuta, M.

Revision History 

  • Version 1.0: 2012-04-11
    Type: Initial release