3DBQ

Crystal structure of TTK kinase domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural and Mechanistic Insights into Mps1 Kinase Activation

Wang, W.Yang, Y.T.Gao, Y.F.Xu, Q.B.Wang, F.Zhu, S.C.Old, W.Resing, K.Ahn, N.Lei, M.Liu, X.D.

(2008) J.CELL.MOL.MED. 13: 1679-1694

  • DOI: 10.1111/j.1582-4934.2008.00605.x

  • PubMed Abstract: 
  • Mps1 is one of the several essential kinases whose activation is required for robust mitotic spindle checkpoint signalling. The activity of Mps1 is tightly regulated and increases dramatically during mitosis or in response to spindle damage. To under ...

    Mps1 is one of the several essential kinases whose activation is required for robust mitotic spindle checkpoint signalling. The activity of Mps1 is tightly regulated and increases dramatically during mitosis or in response to spindle damage. To understand the molecular mechanism underlying Mps1 regulation, we determined the crystal structure of the kinase domain of Mps1. The 2.7-A-resolution crystal structure shows that the Mps1 kinase domain adopts a unique inactive conformation. Intramolecular interactions between the key Glu residue in the C helix of the N-terminal lobe and the backbone amides in the catalytic loop lock the kinase in the inactive conformation. Autophosphorylation appears to be a priming event for kinase activation. We identified Mps1 autophosphorylation sites in the activation and the P+1 loops. Whereas activation loop autophosphorylation enhances kinase activity, autophosphorylation at the P+1 loop (T686) is associated with the active kinase. Mutation of T686 autophosphorylation site impairs both autophosphorylation and transphosphorylation. Furthermore, we demonstrated that phosphorylation of T676 may be a priming event for phosphorylation at T686. Finally, we identified two critical lysine residues in the loop between helices EF and F that are essential for substrate recruitment and maintaining high levels of kinase activity. Our studies reveal critical biochemical mechanisms for Mps1 kinase regulation.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dual specificity protein kinase TTK
A
343Homo sapiensMutation(s): 0 
Gene Names: TTK (MPS1, MPS1L1)
EC: 2.7.12.1
Find proteins for P33981 (Homo sapiens)
Go to Gene View: TTK
Go to UniProtKB:  P33981
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.226 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 105.847α = 90.00
b = 106.427β = 90.00
c = 70.682γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
SHARPphasing
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-02-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance