Ephrin-A1 Active Protein | EFNA1 active protein

Ephrin-A1 Protein, Human, Recombinant (His Tag)

Cat. Num. AAA8120549

• Gene Names: EFNA1; B61; EFL1; ECKLG; EPLG1; LERK1; LERK-1; TNFAIP4
• Purity: >97% as determined by SDS-PAGE
• Synonyms: Ephrin-A1; Ephrin-A1 Protein; Human; Recombinant (His Tag); Human Ephrin-A1/EFNA1 Protein (His Tag); B61 Protein; ECKLG Protein; EFL1 Protein; EFNA1 Protein; EPLG1 Protein; LERK-1 Protein; LERK1 Protein; TNFAIP4 Protein; ephrin-A1; EFNA1 active protein

• Host: HEK293 Cells
• Purity/Purification: >97% as determined by SDS-PAGE
• Form/Format: Lyophilized from sterile PBS, pH7.4. Normally 5%-8% trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization. Please refer to the specific buffer information in the hard copy of CoA.
• Sequence: Met1-Ser182

• Species: Human
• Endotoxin: <1.0EU per ug of the protein as determined by the LAL method
• Predicted N Terminal: Asp 19
• Tag: C-His
• Protein Construction: A DNA sequence encoding the human Ephrin-A1 (NP_004419.2) without the propeptide (Met 1-Ser182) was expressed, fused with a polyhistidine tag at the C-terminus.
• Reconstitution: A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.
• Activity: Measured by its binding ability in a functional ELISA. Immobilized Human Ephrin-A1 His at 2ug/ml (100uL/well) can bind Human EphA1 hFc. The EC50 of Human EphA1 hFc is 8.0-48.0ng/mL.
• Preparation and Storage: Samples are stable for up to twelve months from date of receipt at -20 degree C to -80 degree C. Store it under sterile conditions at -20 degree C to -80 degree C. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.; In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature. Bulk packages of recombinant proteins are provided as frozen liquid.; They are shipped out with blue ice.

SDS-Page

Testing Data

(Measured by its binding ability in a functional ELISA. Immobilized Human Ephrin-A1 His at 2 ug/ml (100 ul/well) can bind Human EphA1 hFc, the EC50 of Human EphA1 hFc is 8.0-48.0 ng/mL.)

Related Product Information for EFNA1 active protein

Background: EPH-related receptor tyrosine kinase ligand 1 (abbreviated as Ephrin-A1) also known as ligand of eph-related kinase 1 or EFNA1, is a member of the ephrin (EPH) family. The Eph family receptor interacting proteins (ephrins) are a family of proteins that serve as the ligands of the Eph receptor, which compose the largest known subfamily of receptor protein-tyrosine kinases (RTKs). Ephrin-A1/EFNA1 and its Eph family of receptor tyrosine kinases are expressed by cells of the SVZ. Ephrin subclasses are further distinguished by their mode of attachment to the plasma membrane: ephrin-A ligands bind EphA receptors and are anchored to the plasma membrane via a glycosylphosphatidylinositol (GPI) linkage, whereas ephrin-B ligands bind EphB receptors and are anchored via a transmembrane domain. An exception is the EphA4 receptor, which binds both subclasses of ephrins. Ephrin-A1 and one of its receptor EphA2 were expressed in xenograft endothelial cells and also tumor cells and play a role in human cancers, at least in part by influencing tumor neovascularization.

References

Deroanne C, et al. (2003) EphrinA1 inactivates integrin-mediated vascular smooth muscle cell spreading via the Rac/PAK pathway. J Cell Sci. 116(7): 1367-76.Ojima T, et al. (2006) EphrinA1 inhibits vascular endothelial growth factor-induced intracellular signaling and suppresses retinal neovascularization and blood-retinal barrier breakdown. Am J Pathol. 168(1): 331-9.Wu D, et al. (2004) Prognostic value of EphA2 and EphrinA-1 in squamous cell cervical carcinoma. Gynecol Oncol. 94(2): 312-9.

NCBI and Uniprot Product Information

• NCBI GI #: 33359682
• NCBI GeneID: 1942
• NCBI Accession #: NP_004419.2
• NCBI GenBank Nucleotide #: NM_004428.2
• UniProt Accession #: P20827; Q5SR60; Q5SR61; Q6I9T9; Q8N578; D3DV86
• Molecular Weight: 23,787 Da
• NCBI Official Full Name: ephrin-A1 isoform a
• NCBI Official Synonym Full Names: ephrin-A1
• NCBI Official Symbol: EFNA1
• NCBI Official Synonym Symbols: B61; EFL1; ECKLG; EPLG1; LERK1; LERK-1; TNFAIP4
• NCBI Protein Information: ephrin-A1; TNF alpha-induced protein 4; ligand of eph-related kinase 1; immediate early response protein B61; eph-related receptor tyrosine kinase ligand 1; tumor necrosis factor alpha-induced protein 4; tumor necrosis factor, alpha-induced protein 4
• UniProt Protein Name: Ephrin-A1
• Protein Family: Ephrin
• UniProt Gene Name: EFNA1
• UniProt Synonym Gene Names: EPLG1; LERK1; TNFAIP4; LERK-1
• UniProt Entry Name: EFNA1_HUMAN

NCBI Description

This gene encodes a member of the ephrin (EPH) family. The ephrins and EPH-related receptors comprise the largest subfamily of receptor protein-tyrosine kinases and have been implicated in mediating developmental events, especially in the nervous system and in erythropoiesis. 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. This gene encodes an EFNA class ephrin which binds to the EPHA2, EPHA4, EPHA5, EPHA6, and EPHA7 receptors. Two transcript variants that encode different isoforms were identified through sequence analysis. [provided by RefSeq, Jul 2008]

Uniprot Description

EFNA1: Cell surface GPI-bound ligand for Eph receptors, a family of receptor tyrosine kinases which are crucial for migration, repulsion and adhesion during neuronal, vascular and epithelial development. Binds promiscuously Eph receptors residing on adjacent cells, leading to contact-dependent bidirectional signaling into neighboring cells. Plays an important role in angiogenesis and tumor neovascularization. The recruitment of VAV2, VAV3 and PI3-kinase p85 subunit by phosphorylated EPHA2 is critical for EFNA1-induced RAC1 GTPase activation and vascular endothelial cell migration and assembly. Exerts anti-oncogenic effects in tumor cells through activation and down-regulation of EPHA2. Activates EPHA2 by inducing tyrosine phosphorylation which leads to its internalization and degradation. Acts as a negative regulator in the tumorigenesis of gliomas by down-regulating EPHA2 and FAK. Can evoke collapse of embryonic neuronal growth cone and regulates dendritic spine morphogenesis. Belongs to the ephrin family. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Cell development/differentiation; Tumor suppressor; Membrane protein, GPI anchor; Ligand, receptor tyrosine kinase

Chromosomal Location of Human Ortholog: 1q21-q22

Cellular Component: anchored to plasma membrane; integral to plasma membrane; extracellular region; plasma membrane

Molecular Function: protein binding; ephrin receptor binding; receptor binding

Biological Process: axon guidance; cell migration; activation of MAPK activity; notochord formation; negative regulation of transcription from RNA polymerase II promoter; regulation of blood vessel endothelial cell migration; regulation of axonogenesis; regulation of angiogenesis; positive regulation of peptidyl-tyrosine phosphorylation; regulation of cell adhesion mediated by integrin; cell-cell signaling; ephrin receptor signaling pathway; angiogenesis; regulation of peptidyl-tyrosine phosphorylation