Details of the Drug Therapeutic Target (DTT)

General Information of Drug Therapeutic Target (DTT) (ID: TTI4ZX2)

• DTT Name: Ephrin type-B receptor 4 (EPHB4)
• Synonyms: Tyrosine-protein kinase TYRO11; TYRO11; MYK1; Hepatoma transmembrane kinase; HTK
• Gene Name: EPHB4
• DTT Type: Clinical trial target; [1]
• BioChemical Class: Kinase
• UniProt ID: EPHB4_HUMAN
• TTD ID: T49507
• EC Number: EC 2.7.10.1
• Sequence:
  MELRVLLCWASLAAALEETLLNTKLETADLKWVTFPQVDGQWEELSGLDEEQHSVRTYEV
  CDVQRAPGQAHWLRTGWVPRRGAVHVYATLRFTMLECLSLPRAGRSCKETFTVFYYESDA
  DTATALTPAWMENPYIKVDTVAAEHLTRKRPGAEATGKVNVKTLRLGPLSKAGFYLAFQD
  QGACMALLSLHLFYKKCAQLTVNLTRFPETVPRELVVPVAGSCVVDAVPAPGPSPSLYCR
  EDGQWAEQPVTGCSCAPGFEAAEGNTKCRACAQGTFKPLSGEGSCQPCPANSHSNTIGSA
  VCQCRVGYFRARTDPRGAPCTTPPSAPRSVVSRLNGSSLHLEWSAPLESGGREDLTYALR
  CRECRPGGSCAPCGGDLTFDPGPRDLVEPWVVVRGLRPDFTYTFEVTALNGVSSLATGPV
  PFEPVNVTTDREVPPAVSDIRVTRSSPSSLSLAWAVPRAPSGAVLDYEVKYHEKGAEGPS
  SVRFLKTSENRAELRGLKRGASYLVQVRARSEAGYGPFGQEHHSQTQLDESEGWREQLAL
  IAGTAVVGVVLVLVVIVVAVLCLRKQSNGREAEYSDKHGQYLIGHGTKVYIDPFTYEDPN
  EAVREFAKEIDVSYVKIEEVIGAGEFGEVCRGRLKAPGKKESCVAIKTLKGGYTERQRRE
  FLSEASIMGQFEHPNIIRLEGVVTNSMPVMILTEFMENGALDSFLRLNDGQFTVIQLVGM
  LRGIASGMRYLAEMSYVHRDLAARNILVNSNLVCKVSDFGLSRFLEENSSDPTYTSSLGG
  KIPIRWTAPEAIAFRKFTSASDAWSYGIVMWEVMSFGERPYWDMSNQDVINAIEQDYRLP
  PPPDCPTSLHQLMLDCWQKDRNARPRFPQVVSALDKMIRNPASLKIVARENGGASHPLLD
  QRQPHYSAFGSVGEWLRAIKMGRYEESFAAAGFGSFELVSQISAEDLLRIGVTLAGHQKK
  ILASVQHMKSQAKPGTPGGTGGPAPQY
• Function: Receptor tyrosine kinase which binds promiscuously transmembrane ephrin-B family ligands residing on adjacent cells, leading to contact-dependent bidirectional signaling into neighboring cells. The signaling pathway downstream of the receptor is referred to as forward signaling while the signaling pathway downstream of the ephrin ligand is referred to as reverse signaling. Together with its cognate ligand/functional ligand EFNB2 it is involved in the regulation of cell adhesion and migration, and plays a central role in heart morphogenesis, angiogenesis and blood vessel remodeling and permeability. EPHB4-mediated forward signaling controls cellular repulsion and segregation from EFNB2-expressing cells.
• KEGG Pathway: Axon guidance (hsa04360)
• Reactome Pathway:
  EPHB-mediated forward signaling (R-HSA-3928662)
  EPH-ephrin mediated repulsion of cells (R-HSA-3928665)
  EPH-Ephrin signaling (R-HSA-2682334)

Molecular Interaction Atlas (MIA) of This DTT

1 Clinical Trial Drug(s) Targeting This DTT

Drug Name	Drug ID	Indication	ICD 11	Highest Status	REF
KD019	DMEFW3G	Brain metastases	2D50	Phase 2	[1]

4 Investigative Drug(s) Targeting This DTT

Drug Name	Drug ID	Indication	ICD 11	Highest Status	REF
EphB4-131	DM3F427	Solid tumour/cancer	2A00-2F9Z	Investigative	[2]
PMID19788238C66	DMCVJK9	Discovery agent	N.A.	Investigative	[3]
PMID23489211C20	DMDYC4J	Discovery agent	N.A.	Investigative	[4]
TG-100435	DMIR3X2	Discovery agent	N.A.	Investigative	[5]

Molecular Expression Atlas (MEA) of This DTT

Disease Name	ICD 11	Studied Tissue	p-value	Fold-Change	Z-score
Lung cancer	2C82	Lung tissue	4.05E-01	6.00E-03	0.02
Breast cancer	2C82	Breast tissue	8.78E-04	0.08	0.23

References

• [1] XL647--a multitargeted tyrosine kinase inhibitor: results of a phase II study in subjects with non-small cell lung cancer who have progressed after responding to treatment with either gefitinib or erlotinib. J Thorac Oncol. 2012 Jan;7(1):219-26.
• [2] URL: http://www.guidetopharmacology.org Nucleic Acids Res. 2015 Oct 12. pii: gkv1037. The IUPHAR/BPS Guide to PHARMACOLOGY in 2016: towards curated quantitative interactions between 1300 protein targets and 6000 ligands. (Target id: 1833).
• [3] Structure-based optimization of potent and selective inhibitors of the tyrosine kinase erythropoietin producing human hepatocellular carcinoma receptor B4 (EphB4). J Med Chem. 2009 Oct 22;52(20):6433-46.
• [4] Amino acid conjugates of lithocholic acid as antagonists of the EphA2 receptor. J Med Chem. 2013 Apr 11;56(7):2936-47.
• [5] Discovery of [7-(2,6-dichlorophenyl)-5-methylbenzo [1,2,4]triazin-3-yl]-[4-(2-pyrrolidin-1-ylethoxy)phenyl]amine--a potent, orally active Src kinas... Bioorg Med Chem Lett. 2007 Feb 1;17(3):602-8.