Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 32.20 kDa 
• Atom Count: 2260 
• Residue Count: 259 
• Unique protein chains: 1

5DT0

Aurora A Kinase in Complex with JNJ-7706621 in Space Group P6122

• DOI: 10.2210/pdb5DT0/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2015-09-17 Released: 2016-07-20 
• Deposition Author(s): Janecek, M., Rossmann, M., Sharma, P., Emery, A., McKenzie, G.J., Huggins, D.J., Stockwell, S., Stokes, J.A., Almeida, E.G., Hardwick, B., Narvaez, A.J., Hyvonen, M., Spring, D.R., Venkitaraman, A.R.
• Funding Organization(s): Wellcome Trust

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.15 Å
• R-Value Free: 0.225 
• R-Value Work: 0.210 
• R-Value Observed: 0.211 

Literature

Allosteric modulation of AURKA kinase activity by a small-molecule inhibitor of its protein-protein interaction with TPX2.

Janecek, M., Rossmann, M., Sharma, P., Emery, A., Huggins, D.J., Stockwell, S.R., Stokes, J.E., Tan, Y.S., Almeida, E.G., Hardwick, B., Narvaez, A.J., Hyvonen, M., Spring, D.R., McKenzie, G.J., Venkitaraman, A.R.

(2016) Sci Rep 6: 28528-28528

• PubMed: 27339427 
• DOI: 10.1038/srep28528
• Primary Citation of Related Structures:  
  5DPV, 5DR6, 5DR9, 5DR2, 5DRD, 5DT0, 5DT4, 5DT3, 5DN3, 5DNR


• PubMed Abstract: 
  

The essential mitotic kinase Aurora A (AURKA) is controlled during cell cycle progression via two distinct mechanisms. Following activation loop autophosphorylation early in mitosis when it localizes to centrosomes, AURKA is allosterically activated on the mitotic spindle via binding to the microtubule-associated protein, TPX2. Here, we report the discovery of AurkinA, a novel chemical inhibitor of the AURKA-TPX2 interaction, which acts via an unexpected structural mechanism to inhibit AURKA activity and mitotic localization. In crystal structures, AurkinA binds to a hydrophobic pocket (the 'Y pocket') that normally accommodates a conserved Tyr-Ser-Tyr motif from TPX2, blocking the AURKA-TPX2 interaction. AurkinA binding to the Y- pocket induces structural changes in AURKA that inhibit catalytic activity in vitro and in cells, without affecting ATP binding to the active site, defining a novel mechanism of allosteric inhibition. Consistent with this mechanism, cells exposed to AurkinA mislocalise AURKA from mitotic spindle microtubules. Thus, our findings provide fresh insight into the catalytic mechanism of AURKA, and identify a key structural feature as the target for a new class of dual-mode AURKA inhibitors, with implications for the chemical biology and selective therapeutic targeting of structurally related kinases.

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Organizational Affiliation: 

MRC Cancer Unit, University of Cambridge, Hills Road, Cambridge CB2 0XZ, United Kingdom.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Aurora kinase A	A	273	Homo sapiens	Mutation(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) Explore O14965  Go to UniProtKB:  O14965
NIH Common Fund Data Resources
PHAROS  O14965 GTEx  ENSG00000087586

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SKE	A	4-({5-amino-1-[(2,6-difluorophenyl)carbonyl]-1H-1,2,4-triazol-3-yl}amino)benzenesulfonamide C15 H12 F2 N6 O3 S KDKUVYLMPJIGKA-UHFFFAOYSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
SKE	IC50:  11   nM  BindingDB
SKE	Kd:  250   nM  BindingDB

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.15 Å
• R-Value Free: 0.225 
• R-Value Work: 0.210 
• R-Value Observed: 0.211 
• Space Group: P 6₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 81.741	α = 90
b = 81.741	β = 90
c = 164.612	γ = 120

Software Package:

Software Name	Purpose
BUSTER	refinement
PHASER	phasing
XDS	data reduction
Aimless	data scaling
AutoPROC	data reduction

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2015-09-17 
• Released Date: 2016-07-20 
Deposition Author(s): Janecek, M., Rossmann, M., Sharma, P., Emery, A., McKenzie, G.J., Huggins, D.J., Stockwell, S., Stokes, J.A., Almeida, E.G., Hardwick, B., Narvaez, A.J., Hyvonen, M., Spring, D.R., Venkitaraman, A.R.

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Funding Organization	Location	Grant Number
Wellcome Trust	United Kingdom	Strategic Award 090340/Z/09/Z

Revision History 

• Version 1.0: 2016-07-20
  Type: Initial release