Recombinant Canine HGFR/c-MET Protein, CF Summary
Product Specifications
Glu25-Arg308 ( alpha chain) & Ser309-Leu935 ( beta chain), with a C-terminal 6-His tag
Analysis
Product Datasheets
4140-ME
Carrier Free
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.
4140-ME
| Formulation | Lyophilized from a 0.2 μm filtered solution in PBS. |
| Reconstitution | Reconstitute at 100 μg/mL in sterile PBS. |
| Shipping | The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. |
| Stability & Storage: | Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
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Background: HGFR/c-MET
HGF R, also known as Met (from N-methyl-N’-nitro-N-nitrosoguanidine induced), is a glycosylated receptor tyrosine kinase that plays a central role in epithelial morphogenesis and cancer development. HGF R is synthesized as a single chain precursor which undergoes posttranslational proteolytic cleavage. This generates a mature HGF R that is a disulfide-linked dimer composed of a 50 kDa extracellular alpha chain and a 145 kDa transmembrane beta chain (1, 2). The extracellular domain (ECD) contains a seven bladed beta -propeller sema domain, a cysteine-rich PSI/MRS region, and four Ig-like E-set domains, while the cytoplasmic region includes a tyrosine kinase domain (3). The sema domain, which is formed by both the alpha and beta chains of HGF R, mediates both ligand binding and receptor dimerization (3, 4). Ligand-induced tyrosine phosphorylation in the cytoplasmic region activates the kinase domain and provides docking sites for multiple SH2-containing molecules (5, 6). HGF stimulation induces HGF R downregulation via internalization and proteasome-dependent degradation (7). In the absence of ligand, HGF R forms noncovalent complexes with a variety of membrane proteins including CD44v6, CD151, EGF R, Fas, integrin alpha 6/ beta 4, plexins B1, B2, and B3, and MSP R/Ron (8 - 15). Ligation of one complex component triggers activation of the other, followed by cooperative signaling effects (8 - 15). Formation of some of these heteromeric complexes is a requirement for epithelial cell morphogenesis and tumor cell invasion (8, 12, 13). HGF released from neighboring mesenchymal cells stimulates HGF R on undifferentiated epithelium and induces epithelial cell scattering and branching tubulogenesis (16). Genetic polymorphisms, chromosomal translocation, overexpression, and additional splicing and proteolytic cleavage of HGF R have been described in a wide range of cancers (1). Within the ECD, canine HGF R shares 85% - 88% amino acid sequence identity with human, mouse and rat HGF R.
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- Gherardi, E. et al. (2003) Proc. Natl. Acad. Sci. USA 100:12039.
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- Orian-Rousseau, V. et al. (2002) Genes Dev. 16:3074.
- Klosek, S.K. et al. (2005) Biochem. Biophys. Res. Commun. 336:408.
- Jo, M. et al. (2000) J. Biol. Chem. 275:8806.
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