1URW

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.220 

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Ligand Structure Quality Assessment 


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: https://doi.org/10.1016/j.bmcl.2004.02.008
  • Primary Citation of Related Structures:  
    1URW

  • 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 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.


  • Organizational Affiliation

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


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CELL DIVISION PROTEIN KINASE 2299Homo sapiensMutation(s): 0 
EC: 2.7.1.37
UniProt & NIH Common Fund Data Resources
Find proteins for P24941 (Homo sapiens)
Explore P24941 
Go to UniProtKB:  P24941
PHAROS:  P24941
GTEx:  ENSG00000123374 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP24941
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
I1P
Query on I1P

Download Ideal Coordinates CCD File 
B [auth A]2-[4-(N-(3-DIMETHYLAMINOPROPYL)SULPHAMOYL)ANILINO]-
C21 H24 N8 O2 S
BBZUBCUIVIEBCP-UHFFFAOYSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
I1P Binding MOAD:  1URW IC50: 3 (nM) from 1 assay(s)
PDBBind:  1URW IC50: 3 (nM) from 1 assay(s)
BindingDB:  1URW IC50: 3 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 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
b = 72.876β = 90
c = 73.351γ = 90
Software Package:
Software NamePurpose
CNXrefinement
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Revision History  (Full details and data files)

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