2E9O

Structure of h-CHK1 complexed with AA582939


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.229 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Discovery of 1,4-dihydroindeno[1,2-c]pyrazoles as a novel class of potent and selective checkpoint kinase 1 inhibitors.

Tong, Y.Claiborne, A.Stewart, K.D.Park, C.Kovar, P.Chen, Z.Credo, R.B.Gu, W.Z.Gwaltney, S.L.Judge, R.A.Zhang, H.Rosenberg, S.H.Sham, H.L.Sowin, T.J.Lin, N.H.

(2007) Bioorg Med Chem 15: 2759-2767

  • DOI: 10.1016/j.bmc.2007.01.012
  • Primary Citation of Related Structures:  
    2E9O, 2E9N

  • PubMed Abstract: 
  • A new class of checkpoint kinase 1 (CHK-1) inhibitors bearing a 1,4-dihydroindeno[1,2-c]pyrazole core was developed after initial hits from high throughput screening. The efficient hit-to-lead process was facilitated by X-ray crystallography and led ...

    A new class of checkpoint kinase 1 (CHK-1) inhibitors bearing a 1,4-dihydroindeno[1,2-c]pyrazole core was developed after initial hits from high throughput screening. The efficient hit-to-lead process was facilitated by X-ray crystallography and led to potent inhibitors (<10nM) against CHK-1. X-ray co-crystal structures of bound inhibitors demonstrated that two sub-series of this class of compounds, exemplified by 21 and 41, exhibit distinctive hydrogen bonding patterns in the specificity pocket of the active site. Two compounds, 41 and 43, were capable of potentiating doxorubicin and camptothecin, both DNA-damaging agents, in cell proliferation assays (MTS and soft agar assays) and abrogating G2/M checkpoint in a mechanism-based FACS assay.


    Organizational Affiliation

    Cancer Research, Global Pharmaceutical R&D, Abbott Laboratories, Abbott Park, IL 60064, USA. yunsong.tong@abbott.com



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Serine/threonine-protein kinase Chk1A269Homo 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 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
A58
Query on A58

Download CCD File 
A
4-(6-{[(4-METHYLCYCLOHEXYL)AMINO]METHYL}-1,4-DIHYDROINDENO[1,2-C]PYRAZOL-3-YL)BENZOIC ACID
C25 H27 N3 O2
MEDLHZCDTXWLOC-GSXCWMCISA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
A58Ki:  20   nM  BindingDB
A58IC50:  20   nM  BindingDB
A58IC50 :  20   nM  PDBBind
A58IC50:  20   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.229 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.94α = 90
b = 65.711β = 94.2
c = 57.773γ = 90
Software Package:
Software NamePurpose
CNXrefinement
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2007-01-26 
  • Released Date: 2008-01-29 
  • Deposition Author(s): Park, C.

Revision History 

  • Version 1.0: 2008-01-29
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance