1URW

CDK2 IN COMPLEX WITH AN IMIDAZO[1,2-b]PYRIDAZINE

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.220 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Imidazo[1,2-B]Pyridazines: A Potent and Selective Class of Cyclin-Dependent Kinase Inhibitors

Byth, K.F., Cooper, N., Culshaw, J.D., Heaton, D.W., Oakes, S.E., Minshull, C.A., Norman, R.A., Pauptit, R.A., Tucker, J.A., Breed, J., Pannifer, A., Rowsell, S., Stanway, J.J., Valentine, A.L., Thomas, A.P.

(2004) Bioorg.Med.Chem.Lett. 14: 2249

  • DOI: 10.1016/j.bmcl.2004.02.008

  • PubMed Abstract: 

    • Modification of imidazo[1,2-a]pyridine CDK inhibitors lead to identification of less lipophilic imidazo[1,2-b]pyridazine series of CDK inhibitors. Although several equivalent compounds from these two series have similar structure and show similar CDK ...

    Modification of imidazo[1,2-a]pyridine CDK inhibitors lead to identification of less lipophilic imidazo[1,2-b]pyridazine series of CDK inhibitors. Although several equivalent compounds from these two series have similar structure and show similar CDK activity, the SAR of the two series differs significantly. Protein inhibitor structure determination has confirmed differences in binding mode and given some understanding of these differences in SAR. Potent and selective imidazo[1,2-b]pyridazine inhibitors of CDK2 have been identified, which show >1 microM plasma levels following a 2mg/kg oral dose to mice.

    Related Citations: 
    • High-Resolution Crystal Structures of Human Cyclin-Dependent Kinase 2 with and without ATP: Bound Waters and Natural Ligand as a Guide for Inhibitor Design
      Schulze-Gahmen, U.,De Bondt, H.,Kim, S.-H.
      (1996) J.Med.Chem. 39: 4540

    Organizational Affiliation: 

    Cancer Research, AstraZeneca, Alderley Park, Macclesfield, Cheshire SK10 4TG, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CELL DIVISION PROTEIN KINASE 2
A
299Homo 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
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
I1P
Query on I1P
Download SDF File 
Download CCD File 
A
2-[4-(N-(3-DIMETHYLAMINOPROPYL)SULPHAMOYL)ANILINO]-
N-[3-(DIMETHYLAMINO)PROPYL]-4-[(4-IMIDAZO[1,2-B]PYRIDAZIN-3-YL-2-PYRIMIDINYL)AMINO]BENZENESULFONAMIDE
C21 H24 N8 O2 S
BBZUBCUIVIEBCP-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
ACE
Query on ACE
A
NON-POLYMERC2 H4 O

--

External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
I1PIC50: <3 nM BINDINGMOAD
I1PIC50: <3 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.220 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 54.169α = 90.00
b = 72.876β = 90.00
c = 73.351γ = 90.00
Software Package:
Software NamePurpose
CNXrefinement
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-04-23
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance