2X6E

Aurora-A bound to an inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.35 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.231 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Imidazo[4,5-b]pyridine derivatives as inhibitors of Aurora kinases: lead optimization studies toward the identification of an orally bioavailable preclinical development candidate.

Bavetsias, V.Large, J.M.Sun, C.Bouloc, N.Kosmopoulou, M.Matteucci, M.Wilsher, N.E.Martins, V.Reynisson, J.Atrash, B.Faisal, A.Urban, F.Valenti, M.de Haven Brandon, A.Box, G.Raynaud, F.I.Workman, P.Eccles, S.A.Bayliss, R.Blagg, J.Linardopoulos, S.McDonald, E.

(2010) J Med Chem 53: 5213-5228

  • DOI: 10.1021/jm100262j
  • Primary Citation of Related Structures:  
    2X6D, 2X6E

  • PubMed Abstract: 
  • Lead optimization studies using 7 as the starting point led to a new class of imidazo[4,5-b]pyridine-based inhibitors of Aurora kinases that possessed the 1-benzylpiperazinyl motif at the 7-position, and displayed favorable in vitro properties. Cocry ...

    Lead optimization studies using 7 as the starting point led to a new class of imidazo[4,5-b]pyridine-based inhibitors of Aurora kinases that possessed the 1-benzylpiperazinyl motif at the 7-position, and displayed favorable in vitro properties. Cocrystallization of Aurora-A with 40c (CCT137444) provided a clear understanding into the interactions of this novel class of inhibitors with the Aurora kinases. Subsequent physicochemical property refinement by the incorporation of solubilizing groups led to the identification of 3-((4-(6-bromo-2-(4-(4-methylpiperazin-1-yl)phenyl)-3H-imidazo[4,5-b]pyridin-7-yl)piperazin-1-yl)methyl)-5-methylisoxazole (51, CCT137690) which is a potent inhibitor of Aurora kinases (Aurora-A IC(50) = 0.015 +/- 0.003 muM, Aurora-B IC(50) = 0.025 muM, Aurora-C IC(50) = 0.019 muM). Compound 51 is highly orally bioavailable, and in in vivo efficacy studies it inhibited the growth of SW620 colon carcinoma xenografts following oral administration with no observed toxicities as defined by body weight loss.


    Organizational Affiliation

    Cancer Research UK Centre for Cancer Therapeutics, The Institute of Cancer Research, 15 Cotswold Road, Sutton, Surrey, SM2 5NG, United Kingdom. vassilios.bavetsias@icr.ac.uk



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SERINE/THREONINE-PROTEIN KINASE 6A285Homo sapiensMutation(s): 0 
Gene Names: AURKAAIKAIRK1ARK1AURAAYK1BTAKIAK1STK15STK6
EC: 2.7.11.1
Find proteins for O14965 (Homo sapiens)
Explore O14965 
Go to UniProtKB:  O14965
NIH Common Fund Data Resources
PHAROS  O14965
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
YM4
Query on YM4

Download CCD File 
A
6-BROMO-7-{4-[(5-METHYLISOXAZOL-3-YL)METHYL]PIPERAZIN-1-YL}-2-[4-(4-METHYLPIPERAZIN-1-YL)PHENYL]-1H-IMIDAZO[4,5-B]PYRIDINE
C26 H31 Br N8 O
GFLQCBTXTRCREJ-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
YM4IC50:  15   nM  BindingDB
YM4IC50 :  15   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.35 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.231 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.25α = 90
b = 83.25β = 90
c = 163.31γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-07-07
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-02-28
    Changes: Database references