5LXM

Crystal structure of Aurora-A bound to a hydrocarbon-stapled proteomimetic of TPX2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.08 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

A TPX2 Proteomimetic Has Enhanced Affinity for Aurora-A Due to Hydrocarbon Stapling of a Helix.

Rennie, Y.K.McIntyre, P.J.Akindele, T.Bayliss, R.Jamieson, A.G.

(2016) ACS Chem. Biol. 11: 3383-3390

  • DOI: 10.1021/acschembio.6b00727

  • PubMed Abstract: 
  • Inhibition of protein kinases using ATP-competitive compounds is an important strategy in drug discovery. In contrast, the allosteric regulation of kinases through the disruption of protein-protein interactions has not been widely adopted, despite th ...

    Inhibition of protein kinases using ATP-competitive compounds is an important strategy in drug discovery. In contrast, the allosteric regulation of kinases through the disruption of protein-protein interactions has not been widely adopted, despite the potential for selective targeting. Aurora-A kinase regulates mitotic entry and mitotic spindle assembly and is a promising target for anticancer therapy. The microtubule-associated protein TPX2 activates Aurora-A through binding to two sites. Aurora-A recognition is mediated by two motifs within the first 43 residues of TPX2, connected by a flexible linker. To characterize the contributions of these three structural elements, we prepared a series of TPX2 proteomimetics and investigated their binding affinity for Aurora-A using isothermal titration calorimetry. A novel stapled TPX2 peptide was developed that has improved binding affinity for Aurora-A and mimics the function of TPX2 in activating Aurora-A's autophosphorylation. We conclude that the helical region of TPX2 folds upon binding Aurora-A, and that stabilization of this helix does not compromise Aurora-A activation. This study demonstrates that the preparation of these proteomimetics using modern synthesis methods is feasible and their biochemical evaluation demonstrates the power of proteomimetics as tool compounds for investigating PPIs involving intrinsically disordered regions of proteins.


    Organizational Affiliation

    International Institute for Integrative Sleep Medicine, University of Tsukuba , Ibaraki 305-8575, Japan.,Department of Molecular and Cell Biology, University of Leicester , Lancaster Road, Leicester LE1 9HN, United Kingdom.,School of Chemistry, Joseph Black Building, University Avenue , Glasgow, G12 8QQ, United Kingdom.,Astbury Centre for Structural Molecular Biology, Faculty of Biological Sciences, University of Leeds , Leeds, LS2 9JT, United Kingdom.,Department of Chemistry, University of Leicester , Lancaster Road, Leicester LE1 9HN, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Aurora kinase A
A
283Homo sapiensMutation(s): 2 
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
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Targeting protein for Xklp2
D
38Homo sapiensMutation(s): 0 
Gene Names: TPX2 (C20orf1, C20orf2, DIL2, HCA519)
Find proteins for Q9ULW0 (Homo sapiens)
Go to Gene View: TPX2
Go to UniProtKB:  Q9ULW0
Small Molecules
Ligands 9 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

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A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
ADP
Query on ADP

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

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A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
PG4
Query on PG4

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A
TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

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A
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
NH3
Query on NH3

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D
AMMONIA
H3 N
QGZKDVFQNNGYKY-UHFFFAOYSA-N
 Ligand Interaction
P4G
Query on P4G

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A
1-ETHOXY-2-(2-ETHOXYETHOXY)ETHANE
C8 H18 O3
RRQYJINTUHWNHW-UHFFFAOYSA-N
 Ligand Interaction
MES
Query on MES

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A
2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
TPO
Query on TPO
A
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
MK8
Query on MK8
D
L-peptide linkingC7 H15 N O2LEU
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.08 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.200 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 79.780α = 90.00
b = 79.780β = 90.00
c = 140.260γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement
xia2data scaling
PDB_EXTRACTdata extraction
xia2data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Medical Research Council (United Kingdom)United KingdomMR/K016903/1
Cancer Research UKUnited KingdomC24461/A12772

Revision History 

  • Version 1.0: 2016-11-02
    Type: Initial release
  • Version 1.1: 2016-12-28
    Type: Database references
  • Version 1.2: 2017-09-13
    Type: Advisory, Author supporting evidence
  • Version 1.3: 2019-10-16
    Type: Data collection