IL2 inducible T cell kinase | Tec family | IUPHAR/BPS Guide to PHARMACOLOGY

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IL2 inducible T cell kinase

target has curated data in GtoImmuPdb

Target id: 2046

Nomenclature: IL2 inducible T cell kinase

Abbreviated Name: ITK

Family: Tec family

Annotation status:  image of an orange circle Annotated and awaiting review. Please contact us if you can help with reviewing.  » Email us

Gene and Protein Information
Species TM AA Chromosomal Location Gene Symbol Gene Name Reference
Human - 620 5q31-q32 ITK IL2 inducible T cell kinase
Mouse - 619 11 B1.1 Itk IL2 inducible T cell kinase
Rat - 626 10 q21 Itk IL2-inducible T-cell kinase
Previous and Unofficial Names
EMT | T-cell-specific kinase | Tcsk | tyrosine-protein kinase ITK/TSK | Tyrosine-protein kinase Lyk | IL2 inducible T-cell kinase
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
Resolution:  3.2Å
Species:  Human
References:  3
Image of receptor 3D structure from RCSB PDB
Description:  Crystal structure of interleukin-2 inducible T-cell kinase (ITK) catalytic domain with thienopyrazolylindole inhibitor 477.
PDB Id:  3V8T
Ligand:  compound 7 [PMID: 22464456]
Resolution:  2.0Å
Species:  Human
References:  11
Image of receptor 3D structure from RCSB PDB
Description:  ITK kinase domain in complex with compound 1 N-{1-[(1,1-dioxo-1-thian-2-yl)(phenyl)methyl]-1H- pyrazol-4-yl}-5,5-difluoro-5a-methyl-1H,4H,4aH,5H,5aH,6H-cyclopropa[f]indazole-3-carboxamide
Ligand:  GNE-4997
Resolution:  2.1Å
Species:  Human
References:  4
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 Affinity Parameter Reference
WZ4002 Hs Inhibition 7.4 pKd 14
pKd 7.4 (Kd 4.3x10-8 M) [14]
GNE-4997 Hs Inhibition 10.1 pKi 4
pKi 10.1 (Ki 9x10-11 M) [4]
compound 7 [PMID: 22464456] Hs Inhibition 9.5 pIC50 11
pIC50 9.5 (IC50 3x10-10 M) [11]
PRN694 Hs Inhibition 9.5 pIC50 13
pIC50 9.5 (IC50 3x10-10 M) [13]
ibrutinib Hs Inhibition 8.3 pIC50 5
pIC50 8.3 (IC50 4.9x10-9 M) [5]
BMS-509744 Hs Inhibition 7.7 pIC50 6
pIC50 7.7 (IC50 1.9x10-8 M) [6]
compound 4g [PMID: 21316219] Hs Inhibition 7.2 pIC50 10
pIC50 7.2 (IC50 6x10-8 M) [10]
acalabrutinib Hs Inhibition <6.0 pIC50 5
pIC50 <6.0 (IC50 >1x10-6 M) [5]
DiscoveRx KINOMEscan® screen
A screen of 72 inhibitors against 456 human kinases. Quantitative data were derived using DiscoveRx KINOMEscan® platform.
Reference: 7,12

Key to terms and symbols Click column headers to sort
Target used in screen: ITK
Ligand Sp. Type Action Affinity Parameter
sunitinib Hs Inhibitor Inhibition 7.9 pKd
staurosporine Hs Inhibitor Inhibition 7.7 pKd
NVP-TAE684 Hs Inhibitor Inhibition 7.5 pKd
foretinib Hs Inhibitor Inhibition 7.2 pKd
SU-14813 Hs Inhibitor Inhibition 6.7 pKd
KW-2449 Hs Inhibitor Inhibition 6.6 pKd
lestaurtinib Hs Inhibitor Inhibition 6.5 pKd
tozasertib Hs Inhibitor Inhibition 6.5 pKd
tamatinib Hs Inhibitor Inhibition 6.4 pKd
fedratinib Hs Inhibitor Inhibition 6.3 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: 1,8

Key to terms and symbols Click column headers to sort
Target used in screen: Itk/ITK
Ligand Sp. Type Action % Activity remaining at 0.5µM % Activity remaining at 1µM % Activity remaining at 10µM
staurosporine Hs Inhibitor Inhibition 2.9 2.5 0.5
Gö 6976 Hs Inhibitor Inhibition 4.3 4.0 4.0
SB 218078 Hs Inhibitor Inhibition 8.3 88.0 70.0
Syk inhibitor Hs Inhibitor Inhibition 21.4 8.0 1.0
K-252a Hs Inhibitor Inhibition 22.7 15.0 1.0
SU11652 Hs Inhibitor Inhibition 30.0 21.0 2.0
indirubin derivative E804 Hs Inhibitor Inhibition 34.8 24.0 2.0
dorsomorphin Hs Inhibitor Inhibition 39.9 54.0 9.0
GSK-3 inhibitor XIII Hs Inhibitor Inhibition 45.4 5.0 0.0
GSK-3 inhibitor IX Hs Inhibitor Inhibition 46.6 22.0 9.0
Displaying the top 10 most potent ligands  View all ligands in screen »
Immunopharmacology Comments
The TEC family protein tyrosine kinases have been identified as key components of T-cell-receptor activation and signalling. TEC family kinases are expressed predominantly by haematopoietic cells. T cells express ITK, TXK and TEC [2]. ITK inhibition has been extensively expolred as therapeutic option for Th2-driven inflammatory diseases. Despite much effort having been made to discover novel ITK inhibitors, and favourable preclinical discoveries, the majority of the lead compounds have not translated or progressed to the clinic. JTE-051 (structure not disclosed) is currently the only ITK inhibitor under clinical evaluation, and this is being examined in Phase 2 studies as a treatment for rheumatoid arthritis (NCT02919475) and psoriasis (NCT03358290).
Cell Type Associations
Immuno Cell Type:  T cells
References:  2
Immuno Process Associations
Immuno Process:  Inflammation
GO Annotations:  Associated to 1 GO processes
GO:0045087 innate immune response IBA
Immuno Process:  T cell (activation)
GO Annotations:  Associated to 3 GO processes
GO:0001865 NK T cell differentiation IBA
GO:0002250 adaptive immune response ISS
GO:0042110 T cell activation TAS
Immuno Process:  B cell (activation)
GO Annotations:  Associated to 1 GO processes
GO:0002250 adaptive immune response ISS
Immuno Process:  Immune regulation
GO Annotations:  Associated to 2 GO processes
GO:0038095 Fc-epsilon receptor signaling pathway TAS
GO:0050852 T cell receptor signaling pathway ISS
Immuno Process:  Immune system development
GO Annotations:  Associated to 1 GO processes
GO:0001865 NK T cell differentiation IBA
Immuno Process:  Cytokine production & signalling
GO Annotations:  Associated to 3 GO processes
GO:0001816 cytokine production ISS
click arrow to show/hide IEA associations
GO:0032609 interferon-gamma production IEA
GO:0032633 interleukin-4 production IEA
Immuno Process:  Cellular signalling
GO Annotations:  Associated to 4 GO processes
GO:0001865 NK T cell differentiation IBA
GO:0038095 Fc-epsilon receptor signaling pathway TAS
GO:0042110 T cell activation TAS
GO:0050852 T cell receptor signaling pathway ISS
Physiological Consequences of Altering Gene Expression
ITK knock-down in Jurkat T cells disrupts HIV-1 attachment, fusion and entry into the cells.
Species:  Human
Tissue:  Jurkat T cells.
Technique:  Small hairpin RNA (shRNA)-mediated knockdown.
References:  9
Clinically-Relevant Mutations and Pathophysiology
Disease:  Lymphoproliferative syndrome 1
Synonyms: Autosomal recessive lymphoproliferative disease [Orphanet: ORPHA238505]
Lymphoproliferative disease [Disease Ontology: DOID:619]
Disease Ontology: DOID:619
OMIM: 613011
Orphanet: ORPHA238505


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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. Berg LJ, Finkelstein LD, Lucas JA, Schwartzberg PL. (2005) Tec family kinases in T lymphocyte development and function. Annu. Rev. Immunol., 23: 549-600. [PMID:15771581]

3. Brown K, Long JM, Vial SC, Dedi N, Dunster NJ, Renwick SB, Tanner AJ, Frantz JD, Fleming MA, Cheetham GM. (2004) Crystal structures of interleukin-2 tyrosine kinase and their implications for the design of selective inhibitors. J. Biol. Chem., 279 (18): 18727-32. [PMID:14766749]

4. Burch JD, Barrett K, Chen Y, DeVoss J, Eigenbrot C, Goldsmith R, Ismaili MH, Lau K, Lin Z, Ortwine DF et al.. (2015) Tetrahydroindazoles as Interleukin-2 Inducible T-Cell Kinase Inhibitors. Part II. Second-Generation Analogues with Enhanced Potency, Selectivity, and Pharmacodynamic Modulation in Vivo. J. Med. Chem., 58 (9): 3806-16. [PMID:25844760]

5. Byrd JC, Harrington B, O'Brien S, Jones JA, Schuh A, Devereux S, Chaves J, Wierda WG, Awan FT, Brown JR et al.. (2016) Acalabrutinib (ACP-196) in Relapsed Chronic Lymphocytic Leukemia. N. Engl. J. Med., 374 (4): 323-32. [PMID:26641137]

6. Das J, Furch JA, Liu C, Moquin RV, Lin J, Spergel SH, McIntyre KW, Shuster DJ, O'Day KD, Penhallow B et al.. (2006) Discovery and SAR of 2-amino-5-(thioaryl)thiazoles as potent and selective Itk inhibitors. Bioorg. Med. Chem. Lett., 16 (14): 3706-12. [PMID:16682193]

7. 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]

8. Gao Y, Davies SP, Augustin M, Woodward A, Patel UA, Kovelman R, Harvey KJ. (2013) A broad activity screen in support of a chemogenomic map for kinase signalling research and drug discovery. Biochem. J., 451 (2): 313-28. [PMID:23398362]

9. Hain A, Krämer M, Linka RM, Nakhaei-Rad S, Ahmadian MR, Häussinger D, Borkhardt A, Münk C. (2018) IL-2 Inducible Kinase ITK is Critical for HIV-1 Infection of Jurkat T-cells. Sci Rep, 8 (1): 3217. [PMID:29453458]

10. Herdemann M, Weber A, Jonveaux J, Schwoebel F, Stoeck M, Heit I. (2011) Optimisation of ITK inhibitors through successive iterative design cycles. Bioorg. Med. Chem. Lett., 21 (6): 1852-6. [PMID:21316219]

11. McLean LR, Zhang Y, Zaidi N, Bi X, Wang R, Dharanipragada R, Jurcak JG, Gillespy TA, Zhao Z, Musick KY et al.. (2012) X-ray crystallographic structure-based design of selective thienopyrazole inhibitors for interleukin-2-inducible tyrosine kinase. Bioorg. Med. Chem. Lett., 22 (9): 3296-300. [PMID:22464456]

12. 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]

13. Zhong Y, Dong S, Strattan E, Ren L, Butchar JP, Thornton K, Mishra A, Porcu P, Bradshaw JM, Bisconte A et al.. (2015) Targeting interleukin-2-inducible T-cell kinase (ITK) and resting lymphocyte kinase (RLK) using a novel covalent inhibitor PRN694. J. Biol. Chem., 290 (10): 5960-78. [PMID:25593320]

14. Zhou W, Ercan D, Chen L, Yun CH, Li D, Capelletti M, Cortot AB, Chirieac L, Iacob RE, Padera R et al.. (2009) Novel mutant-selective EGFR kinase inhibitors against EGFR T790M. Nature, 462 (7276): 1070-4. [PMID:20033049]

How to cite this page

Tec family: IL2 inducible T cell kinase. Last modified on 21/06/2018. Accessed on 24/04/2019. IUPHAR/BPS Guide to PHARMACOLOGY,