2WTW

Aurora-A Inhibitor Structure (2nd crystal form)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.236 

wwPDB Validation   3D Report Full Report


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


Literature

Crystal Structure of an Aurora-A Mutant that Mimics Aurora-B Bound to Mln8054: Insights Into Selectivity and Drug Design.

Dodson, C.A., Kosmopoulou, M., Richards, M.W., Atrash, B., Bavetsias, V., Blagg, J., Bayliss, R.

(2010) Biochem J 427: 19

  • DOI: 10.1042/BJ20091530
  • Primary Citation of Related Structures:  
    2WTW, 2WTV

  • PubMed Abstract: 

    • The production of selective protein kinase inhibitors is often frustrated by the similarity of the enzyme active sites. For this reason, it is challenging to design inhibitors that discriminate between the three Aurora kinases, which are important targets in cancer drug discovery ...

    The production of selective protein kinase inhibitors is often frustrated by the similarity of the enzyme active sites. For this reason, it is challenging to design inhibitors that discriminate between the three Aurora kinases, which are important targets in cancer drug discovery. We have used a triple-point mutant of Aurora-A (AurAx3) which mimics the active site of Aurora-B to investigate the structural basis of MLN8054 selectivity. The bias toward Aurora-A inhibition by MLN8054 is fully recapitulated by AurAx3 in vitro. X-ray crystal structures of the complex suggest that the basis for the discrimination is electrostatic repulsion due to the T217E substitution, which we have confirmed using a single-point mutant. The activation loop of Aurora-A in the AurAx3-MLN8054 complex exhibits an unusual conformation in which Asp274 and Phe275 side chains point into the interior of the protein. There is to our knowledge no documented precedent for this conformation, which we have termed DFG-up. The sequence requirements of the DFG-up conformation suggest that it might be accessible to only a fraction of kinases. MLN8054 thus circumvents the problem of highly homologous active sites. Binding of MLN8054 to Aurora-A switches the character of a pocket within the active site from polar to a hydrophobic pocket, similar to what is observed in the structure of Aurora-A bound to a compound that induces DFG-out. We propose that targeting this pocket may be a productive route in the design of selective kinase inhibitors and describe the structural basis for the rational design of these compounds.

    Organizational Affiliation: 

    Section of Structural Biology, The Institute of Cancer Research, Chester Beatty Laboratories, 237 Fulham Road, London SW36JB, U.K.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SERINE/THREONINE-PROTEIN KINASE 6 AURORA/IPL1-RELATED KINASE 1, BREAST TUMOR-AMPLIFIED KINASE, AURORA-A, AURORA-RELATED KINASE 1, HARK1 A285Homo sapiensMutation(s): 3 
Gene Names: AURKA, AIK, AIRK1, ARK1, AURA, AYK1, BTAK, IAK1, STK15, STK6
EC: 2.7.11.1
Find proteins for O14965 (Homo sapiens)
Explore O14965 
Go to UniProtKB:  O14965
NIH Common Fund Data Resources
PHAROS:  O14965
GTEx:  ENSG00000087586
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZZL
Query on ZZL
Download Ideal Coordinates CCD File 
A
4-{[9-CHLORO-7-(2,6-DIFLUOROPHENYL)-5H-PYRIMIDO[5,4-D][2]BENZAZEPIN-2-YL]AMINO}BENZOIC ACID
C25 H15 Cl F2 N4 O2
HHFBDROWDBDFBR-UHFFFAOYSA-N		 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
ZZLIC50:  5   nM  BindingDB
ZZLKd :  6.5   nM  PDBBind
ZZLIC50:  1   nM  BindingDB
ZZLIC50:  4   nM  BindingDB
ZZLIC50:  34   nM  BindingDB
ZZLIC50:  4   nM  BindingDB
ZZLIC50:  31   nM  BindingDB
ZZLKi:  7   nM  BindingDB
ZZLKd:  6.5   nM  BindingDB
ZZLIC50:  1.5   nM  BindingDB
ZZLIC50:  3   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.236 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 84.038α = 90
b = 84.038β = 90
c = 171.056γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-01-26
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance