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Eph receptor B3

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. Generally has an overlapping and redundant function with EPHB2. Like EPHB2, functions in axon guidance during development regulating for instance the neurons forming the corpus callosum and the anterior commissure, 2 major interhemispheric connections between the temporal lobes of the cerebral cortex. In addition to its role in axon guidance plays also an important redundant role with other ephrin-B receptors in development and maturation of dendritic spines and the formation of excitatory synapses. Controls other aspects of development through regulation of cell migration and positioning. This includes angiogenesis, palate development and thymic epithelium development for instance. Forward and reverse signaling through the EFNB2/EPHB3 complex also regulate migration and adhesion of cells that tubularize the urethra and septate the cloaca. Finally, plays an important role in intestinal epithelium differentiation segregating progenitor from differentiated cells in the crypt.

Post-translational modifications

Phosphorylated. Autophosphorylates upon ligand-binding. Autophosphorylation on Tyr-614 is required for interaction with SH2 domain-containing proteins.

Sequence similarities

Belongs to the protein kinase superfamily. Tyr protein kinase family. Ephrin receptor subfamily.

Tissue specificity

Ubiquitous.

Cellular localization

  • Cell membrane
  • Single-pass type I membrane protein
  • Cell projection
  • Dendrite

Alternative names

  • Ephrin type-B receptor 3
  • EPH-like tyrosine kinase 2
  • Embryonic kinase 2
  • Tyrosine-protein kinase TYRO6
  • EPH-like kinase 2
  • EK2
  • hEK2
  • TYRO6
  • HEK2
  • ETK2
  • EPHB3

Target type

Proteins

Primary research area

Neuroscience

Molecular weight

110330Da