Aurora A kinase bound to an imidazopyridine inhibitor (7a)

Experimental Data Snapshot

  • Resolution: 3.10 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.205 

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Ligand Structure Quality Assessment 

This is version 1.2 of the entry. See complete history


7-(Pyrazol-4-Yl)-3H-Imidazo[4,5-B]Pyridine-Based Derivatives for Kinase Inhibition: Co-Crystallisation Studies with Aurora-A Reveal Distinct Differences in the Orientation of the Pyrazole N1-Substituent.

Bavetsias, V.Perez-Fuertes, Y.Mcintyre, P.J.Atrash, B.Kosmopoulou, M.O'Fee, L.Burke, R.Sun, C.Faisal, A.Bush, K.Avery, S.Henley, A.Raynaud, F.I.Linardopoulos, S.Bayliss, R.Blagg, J.

(2015) Bioorg Med Chem Lett 25: 4203

  • DOI: https://doi.org/10.1016/j.bmcl.2015.08.003
  • Primary Citation of Related Structures:  
    5AAD, 5AAE, 5AAF, 5AAG

  • PubMed Abstract: 

    Introduction of a 1-benzyl-1H-pyrazol-4-yl moiety at C7 of the imidazo[4,5-b]pyridine scaffold provided 7a which inhibited a range of kinases including Aurora-A. Modification of the benzyl group in 7a, and subsequent co-crystallisation of the resulting analogues with Aurora-A indicated distinct differences in binding mode dependent upon the pyrazole N-substituent. Compounds 7a and 14d interact with the P-loop whereas 14a and 14b engage with Thr217 in the post-hinge region. These crystallographic insights provide options for the design of compounds interacting with the DFG motif or with Thr217.

  • Organizational Affiliation

    Cancer Research UK Cancer Therapeutics Unit at The Institute of Cancer Research, London, United Kingdom. Electronic address: vassilios.bavetsias@icr.ac.uk.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
AURORA KINASE A285Homo sapiensMutation(s): 2 
UniProt & NIH Common Fund Data Resources
Find proteins for O14965 (Homo sapiens)
Explore O14965 
Go to UniProtKB:  O14965
PHAROS:  O14965
GTEx:  ENSG00000087586 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO14965
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on 5GX

Download Ideal Coordinates CCD File 
B [auth A]7-(1-benzyl-1H-pyrazol-4-yl)-6-chloro-2-(1,3-dimethyl-1H-pyrazol-4-yl)-3H-imidazo[4,5-b]pyridine
C21 H18 Cl N7
Query on SO4

Download Ideal Coordinates CCD File 
C [auth A],
D [auth A]
O4 S
Experimental Data & Validation

Experimental Data

  • Resolution: 3.10 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.205 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.135α = 90
b = 81.135β = 90
c = 171.527γ = 120
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-09-02
    Type: Initial release
  • Version 1.1: 2015-09-23
    Changes: Database references
  • Version 1.2: 2024-01-10
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description