Tchem EPHB4 Ephrin type-B receptor 4

Protein Summary

Description

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 plays a central role in heart morphogenesis and angiogenesis through regulation of cell adhesion and cell migration. EPHB4-mediated forward signaling controls cellular repulsion and segregation form EFNB2-expressing cells. Plays also a role in postnatal blood vessel remodeling, morphogenesis and permeability and is thus important in the context of tumor angiogenesis. Ephrin receptors and their ligands, the ephrins, mediate numerous developmental processes, particularly in the nervous system. Based on their structures and sequence relationships, ephrins are divided into the ephrin-A (EFNA) class, which are anchored to the membrane by a glycosylphosphatidylinositol linkage, and the ephrin-B (EFNB) class, which are transmembrane proteins. The Eph family of receptors are divided into 2 groups based on the similarity of their extracellular domain sequences and their affinities for binding ephrin-A and ephrin-B ligands. Ephrin receptors make up the largest subgroup of the receptor tyrosine kinase (RTK) family. The protein encoded by this gene binds to ephrin-B2 and plays an essential role in vascular development. [provided by RefSeq, Jul 2008]

Uniprot Accession IDs

• P54760
• B5A970
• B5A971
• B5A972
• Q7Z635
• Q9BTA5
• Q9BXP0

Gene Name

• EPHB4

Ensembl ID

• ENST00000358173
• ENSP00000350896
• ENSG00000196411
• ENST00000616502
• ENSP00000482702

Symbol

• HTK
• MYK1
• TYRO11
• HTK
• MYK1
• HFASD
• CMAVM2
• LMPHM7
• TYRO11

Knowledge Table

Most Knowledge About	Knowledge Value (0 to 1 scale)
protein domain	1
molecular function	0.98
PubMedID	0.86
transcription factor binding site profile	0.83
kinase perturbation	0.81

Protein Classes

DTO Classes

Protein / Kinase / Protein Kinase / Tk Group / Eph Family / Ephrin Type-b Receptor 4

IDG Development Level Summary

Tdark

These are targets about which virtually nothing is known. They do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 322.2   (req: < 5)

Gene RIFs: 100   (req: <= 3)

Antibodies: 627   (req: <= 50)

Tbio

These targets do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 322.2   (req: >= 5)

Gene RIFs: 100   (req: > 3)

Antibodies: 627   (req: > 50)

- OR - satisfy the following criterion:

Gene Ontology Terms: 16

Tchem

Target has at least one ChEMBL compound with an activity cutoff of < 30 nM - AND - satisfies the preceding conditions

Active Ligands: 106

Tclin

Target has at least one approved drug - AND - satisfies the preceding conditions

Active Drugs: 3