4JIK

X-RAY Crystal structure of compound 22a (R)-2-(4-chlorophenyl)-8-(piperidin-3-ylamino)imidazo[1,2-c]pyrimidine-5-carboxamide bound to human chk1 kinase domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Potency switch between CHK1 and MK2: discovery of imidazo[1,2-a]pyrazine- and imidazo[1,2-c]pyrimidine-based kinase inhibitors.

Meng, Z.Ciavarri, J.P.McRiner, A.Zhao, Y.Zhao, L.Reddy, P.A.Zhang, X.Fischmann, T.O.Whitehurst, C.Arshad Siddiqui, M.

(2013) Bioorg.Med.Chem.Lett. 23: 2863-2867

  • DOI: 10.1016/j.bmcl.2013.03.100

  • PubMed Abstract: 
  • Chemistry has been developed to access both imidazo[1,2-a]pyrazines and imidazo[1,2-c]pyrimidines. Small structural modifications in both series led to a switch of potency between two kinases involved in mediating cell cycle checkpoint control, CHK1 ...

    Chemistry has been developed to access both imidazo[1,2-a]pyrazines and imidazo[1,2-c]pyrimidines. Small structural modifications in both series led to a switch of potency between two kinases involved in mediating cell cycle checkpoint control, CHK1 and MK2.


    Organizational Affiliation

    Merck Research Laboratories, 320 Bent Street, Cambridge, MA 02141, USA. zhaoyang.meng@merck.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein kinase Chk1
A
273Homo 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
1KO
Query on 1KO

Download SDF File 
Download CCD File 
A
2-(4-chlorophenyl)-8-[(3S)-piperidin-3-ylamino]imidazo[1,2-c]pyrimidine-5-carboxamide
C18 H19 Cl N6 O
VUQDZGWRLHHYTB-ZDUSSCGKSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
1KOIC50: 18 nM (100) BINDINGDB
1KOIC50: 39 nM BINDINGMOAD
1KOIC50: 18 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.211 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 45.110α = 90.00
b = 65.900β = 102.74
c = 54.760γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
BUSTERphasing
BUSTERrefinement
ADSCdata collection
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2013-03-06 
  • Released Date: 2013-04-17 
  • Deposition Author(s): Fischmann, T.O.

Revision History 

  • Version 1.0: 2013-04-17
    Type: Initial release
  • Version 1.1: 2013-07-10
    Type: Database references