3EJ1

CDK2/CyclinA complexed with a pyrazolopyridazine inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.22 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Synthesis and evaluation of pyrazolo[1,5-b]pyridazines as selective cyclin dependent kinase inhibitors.

Stevens, K.L.Reno, M.J.Alberti, J.B.Price, D.J.Kane-Carson, L.S.Knick, V.B.Shewchuk, L.M.Hassell, A.M.Veal, J.M.Davis, S.T.Griffin, R.J.Peel, M.R.

(2008) Bioorg.Med.Chem.Lett. 18: 5758-5762

  • DOI: 10.1016/j.bmcl.2008.09.069
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • A novel series of pyrazolo[1,5-b]pyridazines have been synthesized and identified as cyclin dependant kinase inhibitors potentially useful for the treatment of solid tumors. Modification of the hinge-binding amine or the C(2)- and C(6)-substitutions ...

    A novel series of pyrazolo[1,5-b]pyridazines have been synthesized and identified as cyclin dependant kinase inhibitors potentially useful for the treatment of solid tumors. Modification of the hinge-binding amine or the C(2)- and C(6)-substitutions on the pyrazolopyridazine core provided potent inhibitors of CDK4 and demonstrated enzyme selectivity against VEGFR-2 and GSK3beta.


    Organizational Affiliation

    Department of Oncology, GlaxoSmithKline, Research Triangle Park, NC 27709, USA. Kirk.L.Stevens@gsk.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cell division protein kinase 2
A, C
298Homo sapiensMutation(s): 0 
Gene Names: CDK2 (CDKN2)
EC: 2.7.11.22
Find proteins for P24941 (Homo sapiens)
Go to Gene View: CDK2
Go to UniProtKB:  P24941
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Cyclin-A2
B, D
260Homo sapiensMutation(s): 0 
Gene Names: CCNA2 (CCN1, CCNA)
Find proteins for P20248 (Homo sapiens)
Go to Gene View: CCNA2
Go to UniProtKB:  P20248
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
5BP
Query on 5BP

Download SDF File 
Download CCD File 
A, C
N-cyclopropyl-4-pyrazolo[1,5-b]pyridazin-3-ylpyrimidin-2-amine
C13 H12 N6
CAGHIASAHLPQMS-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
5BPIC50: 120 nM (100) BINDINGDB
5BPIC50: 120 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.22 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.219 
  • Space Group: P 62 2 2
Unit Cell:
Length (Å)Angle (°)
a = 183.776α = 90.00
b = 183.776β = 90.00
c = 214.045γ = 120.00
Software Package:
Software NamePurpose
CNSphasing
DENZOdata reduction
REFMACrefinement
CNSrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-10-21
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Refinement description, Version format compliance