Structure of Aurora-A bound to a selective imidazopyrazine inhibitor

Experimental Data Snapshot

  • Resolution: 2.60 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.224 

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Structure-based design of imidazo[1,2-a]pyrazine derivatives as selective inhibitors of Aurora-A kinase in cells.

Bouloc, N.Large, J.M.Kosmopoulou, M.Sun, C.Faisal, A.Matteucci, M.Reynisson, J.Brown, N.Atrash, B.Blagg, J.McDonald, E.Linardopoulos, S.Bayliss, R.Bavetsias, V.

(2010) Bioorg Med Chem Lett 20: 5988-5993

  • DOI: https://doi.org/10.1016/j.bmcl.2010.08.091
  • Primary Citation of Related Structures:  
    2XNE, 2XNG

  • PubMed Abstract: 

    Co-crystallisation of the imidazo[1,2-a]pyrazine derivative 15 (3-chloro-N-(4-morpholinophenyl)-6-(pyridin-3-yl)imidazo[1,2-a]pyrazin-8-amine) with Aurora-A provided an insight into the interactions of this class of compound with Aurora kinases. This led to the design and synthesis of potent Aurora-A inhibitors demonstrating up to 70-fold selectivity in cell-based Aurora kinase pharmacodynamic biomarker assays.

  • Organizational Affiliation

    Cancer Research UK Cancer Therapeutics Unit, The Institute of Cancer Research, Sutton, Surrey, United Kingdom.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
SERINE/THREONINE-PROTEIN KINASE 6283Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for O14965 (Homo sapiens)
Explore O14965 
Go to UniProtKB:  O14965
PHAROS:  O14965
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO14965
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on A0H

Download Ideal Coordinates CCD File 
B [auth A]N-(3-{3-chloro-8-[(4-morpholin-4-ylphenyl)amino]imidazo[1,2-a]pyrazin-6-yl}benzyl)methanesulfonamide
C24 H25 Cl N6 O3 S
Binding Affinity Annotations 
IDSourceBinding Affinity
A0H PDBBind:  2XNG IC50: 60 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.60 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.224 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 82.096α = 90
b = 82.096β = 90
c = 171.628γ = 120
Software Package:
Software NamePurpose

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-09-22
    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