4C3P

Structure of dephosphorylated Aurora A (122-403) bound to TPX2 and AMPPCP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.69 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Molecular Mechanism of Aurora a Kinase Autophosphorylation and its Allosteric Activation by Tpx2.

Zorba, A.Buosi, V.Kutter, S.Kern, N.Pontiggia, F.Cho, Y.J.Kern, D.

(2014) Elife 3: 02667

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • We elucidate the molecular mechanisms of two distinct activation strategies (autophosphorylation and TPX2-mediated activation) in human Aurora A kinase. Classic allosteric activation is in play where either activation loop phosphorylation or TPX2 bin ...

    We elucidate the molecular mechanisms of two distinct activation strategies (autophosphorylation and TPX2-mediated activation) in human Aurora A kinase. Classic allosteric activation is in play where either activation loop phosphorylation or TPX2 binding to a conserved hydrophobic groove shifts the equilibrium far towards the active conformation. We resolve the controversy about the mechanism of autophosphorylation by demonstrating intermolecular autophosphorylation in a long-lived dimer by combining X-ray crystallography with functional assays. We then address the allosteric activation by TPX2 through activity assays and the crystal structure of a domain-swapped dimer of dephosphorylated Aurora A and TPX2(1-25). While autophosphorylation is the key regulatory mechanism in the centrosomes in the early stages of mitosis, allosteric activation by TPX2 of dephosphorylated Aurora A could be at play in the spindle microtubules. The mechanistic insights into autophosphorylation and allosteric activation by TPX2 binding proposed here, may have implications for understanding regulation of other protein kinases.DOI: http://dx.doi.org/10.7554/eLife.02667.001.


    Organizational Affiliation

    Department of Biochemistry, Howard Hughes Medical Institute, Brandeis University, Waltham, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
AURORA KINASE A
A, D
282Homo 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
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TARGETING PROTEIN FOR XKLP2
B, E
43Homo 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 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
D
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
ACP
Query on ACP

Download SDF File 
Download CCD File 
A, D
PHOSPHOMETHYLPHOSPHONIC ACID ADENYLATE ESTER
ADENOSINE-5'-[BETA, GAMMA-METHYLENE]TRIPHOSPHATE
C11 H18 N5 O12 P3
UFZTZBNSLXELAL-IOSLPCCCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.69 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.201 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 49.927α = 90.00
b = 86.717β = 90.00
c = 153.546γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
REFMACrefinement
iMOSFLMdata reduction
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-05-28
    Type: Initial release
  • Version 1.1: 2014-06-11
    Type: Database references