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You are here:Home » Molecular Biology » MB-Growth Factors-Cell Factors » CD117, Recombinant, Human (c-kit, Stem Cell Factor, SCF Receptor, Steel Factor Receptor, Mast Cell Growth Factor, MGF)

CD117, Recombinant, Human (c-kit, Stem Cell Factor, SCF Receptor, Steel Factor Receptor,
Mast Cell Growth Factor, MGF)


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C-Kit is the receptor tyrosine kinase for stem cell factor (SCF) and is a member of the subfamily that includes PDGF, CSF-1 and FLT-3/flk-2 receptors (1,2). It plays critical controlling roles in a number of cell types such as hematopoietic stem cells, mast cells, melanocytes and germ cells (3). Upon binding with its ligand, c-Kit receptors are induced undergoing dimerization/ oligomerization and autophosphorylation. Activation of c-Kit results in the recruitment and tyrosine phosphorylation of downstream SH2-containing signaling components including PLCgamma, p85 subunit of PI3 kinase, SHP2 and CrkL (4), which links c-Kit directly to various cell signaling pathways. Molecular lesions that impair the kinase activity of c-Kit are associated with a variety of developmental disorders (5), while mutations that constitutively activate c-Kit can lead to pathogenesis of mastocytosis and gastrointestinal stromal tumors (6). Tyrosine 719 is located in the kinase insert region of the catalytic domain. c-Kit phosphorylated at Tyr719 binds to the p85 subunit of PI3 kinase in vitro and in vivo (7).
Catalog #C2448-23B
Human Kit (GenBank Accession No. BC071593), (a.a. 544-end) with N-terminal His tag,
MW 53.4kD, expressed in an Baculovirus infected Sf9 cell expression system.
Specific Activity 15 U/mg. One unit is defined as the amount of enzyme that will incorporate 1nmol phosphate to the tyrosine substrate per minute at pH 7.4 and 30°C.
Assay buffer 50mM HEPES, pH 7.4, 3mM MgCl2, 3mM MnCl2, 1mM DTT, 3uM Na-orthovanadate, 0.1mM ATP, 30ug/ml Poly (Glu:Tyr)4:1 substrate, and 4ug /ml recombinant c-Kit.
Application useful for the study of enzyme kinetics, screening inhibitors, and selectivity profiling.
Stability >6 months at 80°C
Molecular Weight53.4kD
SourceRecombinant, human from Baculovirus infected Sf9 cells
Purity90% by SDS-PAGE.
Form25 mM Tris-HCl, pH 8.0, 100 mM sodium chloride, 0.05% Tween-20, 50% glycerol, 10 mM reduced glutathione, and 3mM DTT.
Important NoteThis product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.

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