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PhosphoSitePlus® Resource

  • Additional protein information
  • Analytical tools

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REACTIVITY
Product Includes Volume Solution Color
c-Kit Mouse mAb Coated Microwells 96 tests
Sealing Tape 2 sheets

Product Description

The PathScan® Phospho-c-Kit (panTyr) Sandwich ELISA Kit is a solid phase sandwich enzyme-linked immunosorbent assay (ELISA) that detects endogenous levels of c-Kit when tyrosine phosphorylated. A c-Kit Mouse mAb has been coated onto the microwells. After incubation with cell lysates, c-Kit (phospho and nonphospho) is captured by the coated antibody. Following extensive washing, a Biotinylated Phospho-Tyrosine Mouse Detection Antibody is added to detect tyrosine phosphorylation of the captured c-Kit protein. HRP-linked Strepavidin is then used to recognize the bound detection antibody. HRP substrate, TMB, is added to develop color. The magnitude of the absorbance for this developed color is proportional to the quantity of c-Kit phosphorylated on tyrosine.

Antibodies in kit are custom formulations specific to kit.


Specificity / Sensitivity

CST's PathScan® Phospho-c-Kit (panTyr) Sandwich ELISA Kit #7231 detects c-Kit when tyrosine phosphorylated. As shown in Figure 1, a significant induction of c-Kit tyrosine phosphorylation can be detected in H526 cells following treatment with SCF using the c-Kit (panTyr) Sandwich ELISA Kit #7231. The level of total c-Kit (phospho and nonphospho) remains unchanged as shown by Western analysis and by PathScan® Total c-Kit Sandwich ELISA Kit #7197. In Figure 3, Western blot analysis of protein captured in the c-Kit antibody coated microwell shows major band corresponding to the phospho-c-Kit protein. This kit detects proteins from the indicated species, as determined through in-house testing, but may also detect homologous proteins from other species.


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 in vitro and in vivo (7).


1.  Martin, F.H. et al. (1990) Cell 63, 203-11.

2.  Yarden, Y. et al. (1987) EMBO J 6, 3341-51.

3.  Gommerman, J.L. et al. (1997) J Biol Chem 272, 30519-25.

4.  Sattler, M. et al. (1997) J Biol Chem 272, 10248-53.

5.  Nocka, K. et al. (1990) EMBO J 9, 1805-13.

6.  Hirota, S. et al. (1998) Science 279, 577-80.

7.  Blume-Jensen, P. et al. (2000) Nat Genet 24, 157-62.


Entrez-Gene Id 3815
Swiss-Prot Acc. P10721


For Research Use Only. Not For Use In Diagnostic Procedures.
Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
PathScan is a trademark of Cell Signaling Technology, Inc.

7231
PathScan® Phospho-c-Kit (panTyr) Sandwich ELISA Kit