5MRB

Crystal structure of human Mps1 (TTK) in complex with Cpd-5


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.173 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Understanding inhibitor resistance in Mps1 kinase through novel biophysical assays and structures.

Hiruma, Y.Koch, A.Hazraty, N.Tsakou, F.Medema, R.H.Joosten, R.P.Perrakis, A.

(2017) J. Biol. Chem. 292: 14496-14504

  • DOI: 10.1074/jbc.M117.783555
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Monopolar spindle 1 (Mps1/TTK) is a protein kinase essential in mitotic checkpoint signaling, preventing anaphase until all chromosomes are properly attached to spindle microtubules. Mps1 has emerged as a potential target for cancer therapy, and a va ...

    Monopolar spindle 1 (Mps1/TTK) is a protein kinase essential in mitotic checkpoint signaling, preventing anaphase until all chromosomes are properly attached to spindle microtubules. Mps1 has emerged as a potential target for cancer therapy, and a variety of compounds have been developed to inhibit its kinase activity. Mutations in the catalytic domain of Mps1 that give rise to inhibitor resistance, but retain catalytic activity and do not display cross-resistance to other Mps1 inhibitors, have been described. Here we characterize the interactions of two such mutants, Mps1 C604Y and C604W, which raise resistance to two closely related compounds, NMS-P715 and its derivative Cpd-5, but not to the well characterized Mps1 inhibitor, reversine. We show that estimates of the IC50 (employing a novel specific and efficient assay that utilizes a fluorescently labeled substrate) and the binding affinity (KD ) indicate that, in both mutants, Cpd-5 should be better tolerated than the closely related NMS-P715. To gain further insight, we determined the crystal structure of the Mps1 kinase mutants bound to Cpd-5 and NMS-P715 and compared the binding modes of Cpd-5, NMS-P715, and reversine. The difference in steric hindrance between Tyr/Trp604 and the trifluoromethoxy moiety of NMS-P715, the methoxy moiety of Cpd-5, and complete absence of such a group in reversine, account for differences we observe in vitro Our analysis enforces the notion that inhibitors targeting Mps1 drug-resistant mutations can emerge as a feasible intervention strategy based on existing scaffolds, if the clinical need arises.


    Organizational Affiliation

    From the Divisions of Biochemistry and.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dual specificity protein kinase TTK
A
313Homo sapiensMutation(s): 1 
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
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
C5N
Query on C5N

Download SDF File 
Download CCD File 
A
~{N}-(2,6-diethylphenyl)-8-[[2-methoxy-4-(4-methylpiperazin-1-yl)phenyl]amino]-1-methyl-4,5-dihydropyrazolo[4,3-h]quinazoline-3-carboxamide
C33 H40 N8 O2
DHKBTAOKHPQHKT-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
EDO
Query on EDO

Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.173 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 70.582α = 90.00
b = 111.419β = 90.00
c = 115.025γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
XDSdata reduction
PDB_EXTRACTdata extraction
REFMACrefinement
Aimlessdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
NWONetherlands722.015.008
NWONetherlands723.013.003
KWFNetherlands2012-5427

Revision History 

  • Version 1.0: 2017-07-26
    Type: Initial release
  • Version 1.1: 2017-08-02
    Type: Database references
  • Version 1.2: 2017-08-09
    Type: Data collection
  • Version 1.3: 2017-08-23
    Type: Data collection
  • Version 1.4: 2017-09-13
    Type: Database references