Description
Product Usage Information
Western Blotting: 1:1000
Immunoprecipitation: 1:50
Storage
Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA and 50% glycerol. Store at -20°C. Do not aliquot the antibody.
Protocol
Available protocols: Western Blotting, Immunoprecipitation
Specificity / Sensitivity
Phospho-c-Kit (Tyr823) Antibody recognizes endogenous levels of c-Kit protein only when phosphorylated at Tyr823. This antibody also recognizes a hSCF-induced, non-specific band at 95 kDa from a protein of unknown identity.
Species Reactivity: Human
Source / Purification
Polyclonal antibodies are produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Tyr823 of human c-Kit protein. Antibodies are purified by protein A and peptide affinity chromatography.
Background
c-Kit is a member of the subfamily of receptor tyrosine kinases that includes PDGF, CSF-1, and FLT3/flk-2 receptors (1,2). It plays a critical role in activation and growth in a number of cell types, including hematopoietic stem cells, mast cells, melanocytes, and germ cells (3). Upon binding with its stem cell factor (SCF) ligand, c-Kit undergoes dimerization/oligomerization and autophosphorylation. Activation of c-Kit results in the recruitment and tyrosine phosphorylation of downstream SH2-containing signaling components, including PLCγ, the p85 subunit of PI3 kinase, SHP2, and CrkL (4). Molecular lesions that impair the kinase activity of c-Kit are associated with a variety of developmental disorders (5), and mutations that constitutively activate c-Kit can lead to pathogenesis of mastocytosis and gastrointestinal stromal tumors (6). Tyr719 is located in the kinase insert region of the catalytic domain. c-Kit phosphorylated at Tyr719 binds to the p85 subunit of PI3 kinase and (7). Tyr823 is located in the activation loop of the c-Kit kinase domain (8). Phosphorylation of c-Kit at Tyr823 is ligand-induced and has been shown to be important for cell survival and proliferation (9).
Alternate Names
C-Kit; c-Kit protooncogene; CD117; ckit; KIT; KIT proto-oncogene, receptor tyrosine kinase; Mast/stem cell growth factor receptor; Mast/stem cell growth factor receptor Kit; MASTC; p145 c-kit; PBT; Piebald trait protein; Proto-oncogene c-Kit; proto-oncogene tyrosine-protein kinase Kit; SCFR; soluble KIT variant 1; Tyrosine-protein kinase Kit; v-kit Hardy-Zuckerman 4 feline sarcoma viral oncogene homolog; v-kit Hardy-Zuckerman 4 feline sarcoma viral oncogene-like protein
