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Phospho-c-Kit (Tyr721) (F2Z4X) Rabbit Monoclonal Antibody #81691

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  • WB

    Product Specifications

    REACTIVITY H
    SENSITIVITY Endogenous
    MW (kDa) 145, 120
    Source/Isotype Rabbit IgG
    Application Key:
    • WB-Western Blotting 
    Species Cross-Reactivity Key:
    • H-Human 

    Product Information

    Product Usage Information

    Application Dilution
    Western Blotting 1:1000

    Storage

    Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/mL BSA, 50% glycerol, and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

    Protocol

    Specificity / Sensitivity

    Phospho-c-Kit (Tyr721) (F2Z4X) Rabbit Monoclonal Antibody recognizes endogenous levels of c-Kit protein only when phosphorylated at Tyr721.

    Species Reactivity:

    Human

    Source / Purification

    Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Tyr721 of human c-Kit protein.

    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 (GIST) (6). Tyr719 (Tyr721 in human c-Kit, Tyr722 in rat) 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).
    A number of RTK inhibitors have been evaluated in the clinical space in patients with c-Kit driven tumors, beginning with imatinib in 2002 (8). More recently, improved outcomes have been observed with repretinib in patients with advanced, imatinib-resistant GIST (9,10).

    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

    For Research Use Only. Not for Use in Diagnostic Procedures.
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