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 
  • R-Value Observed: 0.184 

wwPDB Validation   3D Report Full Report



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:  
    3TKH, 3TKI

  • 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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Serine/threonine-protein kinase Chk1A323Homo sapiensMutation(s): 0 
Gene Names: CHEK1CHK1
EC: 2.7.11.1
Find proteins for O14757 (Homo sapiens)
Explore O14757 
Go to UniProtKB:  O14757
NIH Common Fund Data Resources
PHAROS  O14757
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
07S
Query on 07S

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 CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
07SIC50:  47   nM  Binding MOAD
07SIC50 :  47   nM  PDBBind
07SIC50:  47   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.79 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.184 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.091α = 90
b = 65.413β = 94.8
c = 57.821γ = 90
Software Package:
Software NamePurpose
CrystalCleardata collection
CNSrefinement
BUSTERrefinement
d*TREKdata reduction
d*TREKdata scaling
CNSphasing

Structure Validation

View Full Validation Report



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