HGF, also known as scatter factor and hepatopoietin A, is a pleiotropic protein in the plasminogen subfamily of S1 peptidases. It is a multidomain molecule that includes an N-terminal PAN/APPLE-like domain, four Kringle domains, and a serine proteinase-like domain that has no detectable protease activity (1-5). Human HGF is secreted as an inactive 728 amino acid (aa) single chain propeptide. It is cleaved after the fourth Kringle domain by a serine protease to form bioactive disulfide-linked HGF with a 60kD alpha and 30kD beta chain. Alternate splicing generates human HGF isoforms that lack the proteinase-like domain and different numbers of the Kringle domains. Human Pro-HGF shares 90%-93% aa sequence identity with bovine, canine, feline, mouse, and rat Pro-HGF. HGF binds heparan-sulfate proteoglycans and the widely expressed receptor tyrosine kinase, HGF R/c-MET (6, 7). HGF-dependent c-MET activation is implicated in the development of many human cancers (8). HGF regulates epithelial morphogenesis by inducing cell scattering and branching tubulogenesis (9, 10). HGF induces the up-regulation of Integrin alpha2beta1 in epithelial cells by a selective increase in alpha2 gene transcription (11). This Integrin serves as a Collagen I receptor, and its blockade disrupts epithelial cell branching tubulogenesis (11, 12). HGF can also alter epithelium morphology by the induction of Nectin-1alpha ectodomain shedding, an adhesion protein component of adherens junctions (13). In the thymus, HGF induces the proliferation, motility, and loss of differentiation markers of thyrocytes and inhibits TSH-stimulated iodine uptake (14). HGF promotes the motility of cardiac stem cells in damaged myocardium (15).
Source:Recombinant protein corresponding to aa32-728, Gln32-Ser728, from human HGF Propeptide, Spodoptera frugiperda, Sf 21 (baculovirus)-derived.
Molecular Weight:~84kD
Endotoxin:<0.10EU/1ug (LAL method).
Biological Activity:>20ng of Recombinant Human HGF Propeptide is cleaved to release active HGF when treated for 4 hours at 37°C with 5ng of kallikrein.
Storage and Stability:May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.
仕様
Size：10ug
Source Antigen：Recombinant, Spodoptera frugiperda, Sf 21 (baculovirus) cells
Grade：Highly Purified
Purity：~95% (SDS-PAGE)
Form：Supplied as a lyophilized powder in PBS. Reconstitute with 100ul PBS.
