Tchem EPHA3 Ephrin type-A receptor 3

Protein Summary

Description

Receptor tyrosine kinase which binds promiscuously membrane-bound ephrin 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. Highly promiscuous for ephrin-A ligands it binds preferentially EFNA5. Upon activation by EFNA5 regulates cell-cell adhesion, cytoskeletal organization and cell migration. Plays a role in cardiac cells migration and differentiation and regulates the formation of the atrioventricular canal and septum during development probably through activation by EFNA1. Involved in the retinotectal mapping of neurons. May also control the segregation but not the guidance of motor and sensory axons during neuromuscular circuit development. This gene belongs to the ephrin receptor subfamily of the protein-tyrosine kinase family. EPH and EPH-related receptors have been implicated in mediating developmental events, particularly in the nervous system. Receptors in the EPH subfamily typically have a single kinase domain and an extracellular region containing a Cys-rich domain and 2 fibronectin type III repeats. The ephrin 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. This gene encodes a protein that binds ephrin-A ligands. Two alternatively spliced transcript variants have been described for this gene. [provided by RefSeq, Jul 2008]

Uniprot Accession IDs

• P29320
• Q9H2V3
• Q9H2V4

Gene Name

• EPHA3

Ensembl ID

• ENST00000336596
• ENSP00000337451
• ENSG00000044524
• ENST00000452448
• ENSP00000399926

Symbol

• ETK
• ETK1
• HEK
• TYRO4
• EK4
• ETK
• HEK
• ETK1
• HEK4
• TYRO4

Knowledge Table

Most Knowledge About	Knowledge Value (0 to 1 scale)
protein domain	1
molecular function	0.99
transcription factor perturbation	0.94
microRNA	0.93
gene perturbation	0.8

Protein Classes

DTO Classes

Protein / Kinase / Protein Kinase / Tk Group / Eph Family / Ephrin Type-a Receptor 3

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: 339.62   (req: < 5)

Gene RIFs: 48   (req: <= 3)

Antibodies: 457   (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: 339.62   (req: >= 5)

Gene RIFs: 48   (req: > 3)

Antibodies: 457   (req: > 50)

- OR - satisfy the following criterion:

Gene Ontology Terms: 24

Tchem

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

Active Ligands: 12

Tclin

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

Active Drugs: 2