5OS5

Crystal structure of Aurora-A kinase in complex with an allosterically binding fragment


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.74 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Characterization of Three Druggable Hot-Spots in the Aurora-A/TPX2 Interaction Using Biochemical, Biophysical, and Fragment-Based Approaches.

McIntyre, P.J.Collins, P.M.Vrzal, L.Birchall, K.Arnold, L.H.Mpamhanga, C.Coombs, P.J.Burgess, S.G.Richards, M.W.Winter, A.Veverka, V.Delft, F.V.Merritt, A.Bayliss, R.

(2017) ACS Chem. Biol. 12: 2906-2914

  • DOI: 10.1021/acschembio.7b00537
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The mitotic kinase Aurora-A and its partner protein TPX2 (Targeting Protein for Xenopus kinesin-like protein 2) are overexpressed in cancers, and it has been proposed that they work together as an oncogenic holoenzyme. TPX2 is responsible for activat ...

    The mitotic kinase Aurora-A and its partner protein TPX2 (Targeting Protein for Xenopus kinesin-like protein 2) are overexpressed in cancers, and it has been proposed that they work together as an oncogenic holoenzyme. TPX2 is responsible for activating Aurora-A during mitosis, ensuring proper cell division. Disruption of the interface with TPX2 is therefore a potential target for novel anticancer drugs that exploit the increased sensitivity of cancer cells to mitotic stress. Here, we investigate the interface using coprecipitation assays and isothermal titration calorimetry to quantify the energetic contribution of individual residues of TPX2. Residues Tyr8, Tyr10, Phe16, and Trp34 of TPX2 are shown to be crucial for robust complex formation, suggesting that the interaction could be abrogated through blocking any of the three pockets on Aurora-A that complement these residues. Phosphorylation of Aurora-A on Thr288 is also necessary for high-affinity binding, and here we identify arginine residues that communicate the phosphorylation of Thr288 to the TPX2 binding site. With these findings in mind, we conducted a high-throughput X-ray crystallography-based screen of 1255 fragments against Aurora-A and identified 59 hits. Over three-quarters of these hits bound to the pockets described above, both validating our identification of hotspots and demonstrating the druggability of this protein-protein interaction. Our study exemplifies the potential of high-throughput crystallography facilities such as XChem to aid drug discovery. These results will accelerate the development of chemical inhibitors of the Aurora-A/TPX2 interaction.


    Organizational Affiliation

    Department of Molecular and Cell Biology, Henry Wellcome Building, University of Leicester , Leicester, LE1 9HN, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Aurora kinase A
A
268Homo sapiensMutation(s): 0 
Gene Names: AURKA (AIK, AIRK1, ARK1, AURA, AYK1, BTAK, IAK1, STK15, STK6)
EC: 2.7.11.1
Find proteins for O14965 (Homo sapiens)
Go to Gene View: AURKA
Go to UniProtKB:  O14965
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

Download SDF File 
Download CCD File 
A
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
A8K
Query on A8K

Download SDF File 
Download CCD File 
A
4-(4-hydroxyphenyl)sulfanylphenol
C12 H10 O2 S
VWGKEVWFBOUAND-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TPO
Query on TPO
A
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.74 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.197 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 82.370α = 90.00
b = 82.370β = 90.00
c = 175.310γ = 120.00
Software Package:
Software NamePurpose
xia2data reduction
PHENIXphasing
XSCALEdata scaling
PDB_EXTRACTdata extraction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Cancer Research UKUnited KingdomC24461/A12772
Cancer Research UKUnited KingdomC24461/A23302

Revision History 

  • Version 1.0: 2017-11-01
    Type: Initial release
  • Version 1.1: 2017-11-29
    Type: Database references