Recombinant Protein

EPHA4 / EPH Receptor A4

Human

Unmodified

85.6 kDa

Mammalian Cells

Mammal

Greater than 95% by SDS-PAGE

Receptor tyrosine kinase which binds 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, it has the unique property among Eph receptors to bind and to be physiologically activated by both GPI-anchored ephrin-A and transmembrane ephrin-B ligands including EFNA1 and EFNB3. Upon activation by ephrin ligands, modulates cell morphology and integrin-dependent cell adhesion through regulation of the Rac, Rap and Rho GTPases activity. Plays an important role in the development of the nervous system controlling different steps of axonal guidance including the establishment of the corticospinal projections. May also control the segregation of motor and sensory axons during neuromuscular circuit development. In addition to its role in axonal guidance plays a role in synaptic plasticity. Activated by EFNA1 phosphorylates CDK5 at 'Tyr-15' which in turn phosphorylates NGEF regulating RHOA and dendritic spine morphogenesis. In the nervous system, plays also a role in repair after injury preventing axonal regeneration and in angiogenesis playing a role in central nervous system vascular formation. Additionally, its promiscuity makes it available to participate in a variety of cell-cell signaling regulating for instance the development of the thymic epithelium.

The ED50 as determined by its ability to binding recombinant human Ephrin-A5 used funtional ELISA is 66.8nM when EphA4 2ug/ml in a solid phases.

Less than 1.0 EU/µg protein (determined by LAL method).

Lyophilized from 0.2 µm filtered 20 mM Tris-HCl, pH 8.0, 150 mM NaCl

Store at -80°C for up to 1 year. Avoid freeze-thaw cycles.

For research use only. Intended for use by laboratory professionals.

This protein carries the LSBio 100% Guarantee.

Uniprot: P54764 NCBI: NM_004438 NP_004429.1