• Purity

  >90%, by SDS-PAGE under reducing conditions and visualized by silver stain

• Endotoxin Level

  <0.10 EU per 1 μg of the protein by the LAL method.  

• Activity

  Measured by its binding ability in a functional ELISA. Immobilized rmEphB6/Fc Chimera at 2 µg/mL (100 µL/well) can bind rmEphrin-B2/Fc Chimera with a linear range of 0.078-5 ng/mL.

• Source

  Mouse myeloma cell line, NS0-derived

  Mouse EphB6 (Leu33-Ser587) Accession # O08644	DIEGRMD	Human IgG1 (Pro100-Lys330)	6-His tag
  N-terminus			C-terminus

• Accession #

• N-terminal Sequence    
  Analysis

  Leu33

• Structure / Form

  Disulfide-linked homodimer

• Predicted Molecular Mass

  87.3 kDa (monomer)

• SDS-PAGE

  100 kDa, reducing conditions

Background: EphB6

EphB6, also known as Mep (1), is a member of the Eph receptor family which binds members of the ephrin ligand family. There are two classes of receptors, designated A and B. Both the A and B class receptors have an extracellular region consisting of a globular domain, a cysteine-rich domain, and two fibronectin type III domains. This is followed by the transmembrane region and cytoplasmic region. The cytoplasmic region contains a juxtamembrane motif with two tyrosine residues, which are the major autophosphorylation sites, a kinase domain, and a conserved sterile alpha motif (SAM) in the carboxy tail which contains one conserved tyrosine residue. Activation of kinase activity occurs after ligand recognition and binding. However, it has been found that EphB6 contains substitutions within the kinase domain which results in EphB6 having no kinase activity (4). The ligands which bind EphB6 are unknown (2, 3). However, we have observed that the ephrin-B1 and ephrin-B2 ligands can bind the immobilized receptor in an ELISA-type assay. The extracellular domains of human and mouse EphB6 share 92% amino acid identity. Only membrane-bound or Fc-clustered ligands are capable of activating the receptor in vitro. While soluble monomeric ligands bind the receptor, they do not induce receptor autophosphorylation and activation (2). In vivo, the ligands and receptors display reciprocal expression (3). It has been found that nearly all receptors and ligands are expressed in developing and adult neural tissue (3). The Eph/ephrin families also appear to play a role in angiogenesis (3).

• References:

1. Eph Nomenclature Committee [letter] (1997) Cell 90:403.

2. Flanagan, J.G. and P. Vanderhaeghen (1998) Annu. Rev. Neurosci. 21:309.

3. Pasquale, E.B. (1997) Curr. Opin. Cell Biol. 9:608.

4. Gurniak, C.B. and L.J. Berg (1996) Oncogene 13:777.

• Long Name:

  Eph Receptor B6

• Entrez Gene IDs:

  2051 (Human); 13848 (Mouse)

• Alternate Names:

  EC 2.7.10.1; EPH receptor B6; EphB6; ephrin type-B receptor 6; Hep; HEPTyrosine-protein kinase-defective receptor EPH-6; Mep; MGC129910; MGC129911