TTK protein kinase | TTK family | IUPHAR Guide to IMMUNOPHARMACOLOGY

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TTK protein kinase

Target not currently curated in GtoImmuPdb

Target id: 2264

Nomenclature: TTK protein kinase

Abbreviated Name: TTK

Family: TTK family

Gene and Protein Information
Species TM AA Chromosomal Location Gene Symbol Gene Name Reference
Human - 857 6q13-q21 TTK TTK protein kinase
Mouse - 830 9 E2 Ttk Ttk protein kinase
Rat - 835 8 q31 Ttk Ttk protein kinase
Previous and Unofficial Names
cancer/testis antigen 96 | CT96 | dual specificity protein kinase TTK | Esk1 | Mps1 | monopolar spindle kinase 1
Database Links
ChEMBL Target
Ensembl Gene
Entrez Gene
Human Protein Atlas
KEGG Enzyme
RefSeq Nucleotide
RefSeq Protein
Selected 3D Structures
Image of receptor 3D structure from RCSB PDB
Description:  Crystal structure of human dual specificity protein kinase (TTK).
Resolution:  2.3Å
Species:  Human
References:  11
Image of receptor 3D structure from RCSB PDB
Description:  Crystal structure of human Mps1 (TTK) catalytic domain in complex with ATP.
Ligand:  ATP
Resolution:  2.7Å
Species:  Human
References:  4
Image of receptor 3D structure from RCSB PDB
Description:  Crystal structure of the human TTK in complex with an inhibitor.
PDB Id:  6N6O
Ligand:  compound 20 [PMID: 30998356]
Resolution:  2.6Å
Species:  Human
References:  12
Enzyme Reaction
EC Number:

Download all structure-activity data for this target as a CSV file

Key to terms and symbols View all chemical structures Click column headers to sort
Ligand Sp. Action Value Parameter Reference
Ro3280 Hs Inhibition 7.3 pKd 3
pKd 7.3 (Kd 5.1x10-8 M) [3]
Description: Ambit selectivity screen at 1μM Ro3280.
GNE-7915 Hs Inhibition 7.3 pKi 6
pKi 7.3 (Ki 5.3x10-8 M) [6]
compound 20 [PMID: 30998356] Hs Inhibition 9.1 pIC50 12
pIC50 9.1 (IC50 7x10-10 M) [12]
Description: In vitro inhibitory activity using the proprietary LanthaScreen Eu kinase binding assay.
MPI-0479605 Hs Inhibition 8.7 pIC50 13
pIC50 8.7 (IC50 1.8x10-9 M) [13]
compound 27f [PMID: 25625617] Hs Inhibition 8.6 pIC50 10
pIC50 8.6 (IC50 2.8x10-9 M) [10]
Description: Biochemical assay
compound 34h [PMID: 27055065] Hs Inhibition 8.0 – 8.3 pIC50 8-9
pIC50 8.0 – 8.3 (IC50 1.1x10-8 – 5x10-9 M) [8-9]
empesertib Hs Inhibition >8.0 pIC50 14
pIC50 >8.0 (IC50 <1x10-8 M) [14]
AZ3146 Hs Inhibition ~7.5 pIC50 7
pIC50 ~7.5 (IC50 ~3.5x10-8 M) [7]
Description: In vitro assay using a His-tagged catalytic domain fragment of MPS1 (amino acids 510–857).
NMS-P715 Hs Inhibition 6.7 pIC50 2
pIC50 6.7 (IC50 1.82x10-7 M) [2]
MPS1-IN-1 Hs Inhibition 6.4 pIC50 11
pIC50 6.4 (IC50 3.67x10-7 M) [11]
DiscoveRx KINOMEscan® screen
A screen of 72 inhibitors against 456 human kinases. Quantitative data were derived using DiscoveRx KINOMEscan® platform.
Reference: 5,15

Key to terms and symbols Click column headers to sort
Target used in screen: TTK
Ligand Sp. Type Action Value Parameter
lestaurtinib Hs Inhibitor Inhibition 8.2 pKd
JNJ-28312141 Hs Inhibitor Inhibition 7.5 pKd
NVP-TAE684 Hs Inhibitor Inhibition 7.3 pKd
staurosporine Hs Inhibitor Inhibition 7.2 pKd
sunitinib Hs Inhibitor Inhibition 7.2 pKd
GSK-1838705A Hs Inhibitor Inhibition 7.1 pKd
KW-2449 Hs Inhibitor Inhibition 7.0 pKd
pazopanib Hs Inhibitor Inhibition 6.8 pKd
SU-14813 Hs Inhibitor Inhibition 6.7 pKd
AST-487 Hs Inhibitor Inhibition 6.6 pKd
Displaying the top 10 most potent ligands  View all ligands in screen »
EMD Millipore KinaseProfilerTM screen/Reaction Biology Kinase HotspotSM screen
A screen profiling 158 kinase inhibitors (Calbiochem Protein Kinase Inhibitor Library I and II, catalogue numbers 539744 and 539745) for their inhibitory activity at 1µM and 10µM against 234 human recombinant kinases using the EMD Millipore KinaseProfilerTM service.

A screen profiling the inhibitory activity of 178 commercially available kinase inhibitors at 0.5µM against a panel of 300 recombinant protein kinases using the Reaction Biology Corporation Kinase HotspotSM platform.

Reference: ...1

Key to terms and symbols Click column headers to sort
Target used in screen: nd/TTK
Ligand Sp. Type Action % Activity remaining at 0.5µM % Activity remaining at 1µM % Activity remaining at 10µM
K-252a Hs Inhibitor Inhibition 18.9
PKR inhibitor Hs Inhibitor Inhibition 31.1
staurosporine Hs Inhibitor Inhibition 36.3
indirubin derivative E804 Hs Inhibitor Inhibition 46.1
Cdk2 inhibitor IV Hs Inhibitor Inhibition 47.8
JAK3 inhibitor VI Hs Inhibitor Inhibition 54.4
midostaurin Hs Inhibitor Inhibition 55.0
SU11652 Hs Inhibitor Inhibition 59.8
SU9516 Hs Inhibitor Inhibition 59.9
Cdk1/2 inhibitor III Hs Inhibitor Inhibition 60.6
Displaying the top 10 most potent ligands  View all ligands in screen »


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1. Anastassiadis T, Deacon SW, Devarajan K, Ma H, Peterson JR. (2011) Comprehensive assay of kinase catalytic activity reveals features of kinase inhibitor selectivity. Nat. Biotechnol., 29 (11): 1039-45. [PMID:22037377]

2. Caldarelli M, Angiolini M, Disingrini T, Donati D, Guanci M, Nuvoloni S, Posteri H, Quartieri F, Silvagni M, Colombo R. (2011) Synthesis and SAR of new pyrazolo[4,3-h]quinazoline-3-carboxamide derivatives as potent and selective MPS1 kinase inhibitors. Bioorg. Med. Chem. Lett., 21 (15): 4507-11. [PMID:21723120]

3. Chen S, Bartkovitz D, Cai J, Chen Y, Chen Z, Chu XJ, Le K, Le NT, Luk KC, Mischke S et al.. (2012) Identification of novel, potent and selective inhibitors of Polo-like kinase 1. Bioorg. Med. Chem. Lett., 22 (2): 1247-50. [PMID:22172702]

4. Chu ML, Lang Z, Chavas LM, Neres J, Fedorova OS, Tabernero L, Cherry M, Williams DH, Douglas KT, Eyers PA. (2010) Biophysical and X-ray crystallographic analysis of Mps1 kinase inhibitor complexes. Biochemistry, 49 (8): 1689-701. [PMID:20099905]

5. Davis MI, Hunt JP, Herrgard S, Ciceri P, Wodicka LM, Pallares G, Hocker M, Treiber DK, Zarrinkar PP. (2011) Comprehensive analysis of kinase inhibitor selectivity. Nat. Biotechnol., 29 (11): 1046-51. [PMID:22037378]

6. Estrada AA, Chan BK, Baker-Glenn C, Beresford A, Burdick DJ, Chambers M, Chen H, Dominguez SL, Dotson J, Drummond J et al.. (2014) Discovery of highly potent, selective, and brain-penetrant aminopyrazole leucine-rich repeat kinase 2 (LRRK2) small molecule inhibitors. J. Med. Chem., 57 (3): 921-36. [PMID:24354345]

7. Hewitt L, Tighe A, Santaguida S, White AM, Jones CD, Musacchio A, Green S, Taylor SS. (2010) Sustained Mps1 activity is required in mitosis to recruit O-Mad2 to the Mad1-C-Mad2 core complex. J. Cell Biol., 190 (1): 25-34. [PMID:20624899]

8. Hoelder S, Blagg J, Solanki S, Woodward H, Naud S, Bavetsias V, Sheldrake P, Innocenti P, Cheung J, Atrash B. (2014) Inhibitor compounds. Patent number: WO2014037750. Assignee: Cancer Research Technology Limited. Priority date: 07/09/2012. Publication date: 13/03/2014.

9. Innocenti P, Woodward HL, Solanki S, Naud S, Westwood IM, Cronin N, Hayes A, Roberts J, Henley AT, Baker R et al.. (2016) Rapid Discovery of Pyrido[3,4-d]pyrimidine Inhibitors of Monopolar Spindle Kinase 1 (MPS1) Using a Structure-Based Hybridization Approach. J. Med. Chem., 59 (8): 3671-88. [PMID:27055065]

10. Kusakabe K, Ide N, Daigo Y, Itoh T, Yamamoto T, Hashizume H, Nozu K, Yoshida H, Tadano G, Tagashira S et al.. (2015) Discovery of imidazo[1,2-b]pyridazine derivatives: selective and orally available Mps1 (TTK) kinase inhibitors exhibiting remarkable antiproliferative activity. J. Med. Chem., 58 (4): 1760-75. [PMID:25625617]

11. Kwiatkowski N, Jelluma N, Filippakopoulos P, Soundararajan M, Manak MS, Kwon M, Choi HG, Sim T, Deveraux QL, Rottmann S et al.. (2010) Small-molecule kinase inhibitors provide insight into Mps1 cell cycle function. Nat. Chem. Biol., 6 (5): 359-68. [PMID:20383151]

12. Riggs JR, Elsner J, Cashion D, Robinson D, Tehrani L, Nagy M, Fultz KE, Krishna Narla R, Peng X, Tran T et al.. (2019) Design and Optimization Leading to an Orally Active TTK Protein Kinase Inhibitor with Robust Single Agent Efficacy. J. Med. Chem., 62 (9): 4401-4410. [PMID:30998356]

13. Tardif KD, Rogers A, Cassiano J, Roth BL, Cimbora DM, McKinnon R, Peterson A, Douce TB, Robinson R, Dorweiler I et al.. (2011) Characterization of the cellular and antitumor effects of MPI-0479605, a small-molecule inhibitor of the mitotic kinase Mps1. Mol. Cancer Ther., 10 (12): 2267-75. [PMID:21980130]

14. Wengner AM, Siemeister G, Koppitz M, Schulze V, Kosemund D, Klar U, Stoeckigt D, Neuhaus R, Lienau P, Bader B et al.. (2016) Novel Mps1 Kinase Inhibitors with Potent Antitumor Activity. Mol. Cancer Ther., 15 (4): 583-92. [PMID:26832791]

15. Wodicka LM, Ciceri P, Davis MI, Hunt JP, Floyd M, Salerno S, Hua XH, Ford JM, Armstrong RC, Zarrinkar PP et al.. (2010) Activation state-dependent binding of small molecule kinase inhibitors: structural insights from biochemistry. Chem. Biol., 17 (11): 1241-9. [PMID:21095574]

How to cite this page

TTK family: TTK protein kinase. Last modified on 04/07/2019. Accessed on 25/09/2020. IUPHAR/BPS Guide to PHARMACOLOGY,