4H7Y

Crystal structure of the tetratricopeptide repeat (TPR) motif of human dual specificity protein kinase Mps1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.199 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural and functional insights into the role of the N-terminal Mps1 TPR domain in the SAC (spindle assembly checkpoint).

Thebault, P.Chirgadze, D.Y.Dou, Z.Blundell, T.L.Elowe, S.Bolanos-Garcia, V.M.

(2012) Biochem.J. 448: 321-328

  • DOI: 10.1042/BJ20121448
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The SAC (spindle assembly checkpoint) is a surveillance system that ensures the timely and accurate transmission of the genetic material to offspring. The process implies kinetochore targeting of the mitotic kinases Bub1 (budding uninhibited by benza ...

    The SAC (spindle assembly checkpoint) is a surveillance system that ensures the timely and accurate transmission of the genetic material to offspring. The process implies kinetochore targeting of the mitotic kinases Bub1 (budding uninhibited by benzamidine 1), BubR1 (Bub1 related) and Mps1 (monopolar spindle 1), which is mediated by the N-terminus of each kinase. In the present study we report the 1.8 Å (1 Å=0.1 nm) crystal structure of the TPR (tetratricopeptide repeat) domain in the N-terminal region of human Mps1. The structure reveals an overall high similarity to the TPR motif of the mitotic checkpoint kinases Bub1 and BubR1, and a number of unique features that include the absence of the binding site for the kinetochore structural component KNL1 (kinetochore-null 1; blinkin), and determinants of dimerization. Moreover, we show that a stretch of amino acids at the very N-terminus of Mps1 is required for dimer formation, and that interfering with dimerization results in mislocalization and misregulation of kinase activity. The results of the present study provide an important insight into the molecular details of the mitotic functions of Mps1 including features that dictate substrate selectivity and kinetochore docking.


    Organizational Affiliation

    Centre de Recherche du CHUQ, 2705 Boulevard Laurier, RC-9800 Québec, Canada G1V 4G2.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dual specificity protein kinase TTK
A, B, C, D
161Homo sapiensGene 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: 1.8 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.199 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 79.502α = 90.00
b = 80.250β = 90.00
c = 141.278γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PHENIXphasing
GDAdata collection
PHENIXrefinement
XDSdata scaling
PHENIXmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-12-12
    Type: Initial release