| 货号 | 7298C |
| 描述 | CSTs PathScan® Phospho-c-Kit (Tyr719) Sandwich ELISA Kit is a solid phase sandwich enzyme-linked immunosorbent assay (ELISA) that detects endogenous levels of c-Kit protein when phosphorylated at Tyr719. A c-Kit Mouse mAb* has been coated onto the microwells. After incubation with cell lysates, both phospho- and nonphospho-c-Kit proteins are captured by the coated antibody. Following extensive washing, Phospho-c-Kit (Tyr719) Rabbit Antibody is added to detect the captured phospho-c-Kit protein. Anti-rabbit IgG HRP-linked Antibody #7074* is then used to recognize the bound detection antibody. HRP substrate, TMB, is added to develop color. The magnitude of absorbance for this developed color is proportional to the quantity of c-Kit protein phosphorylated at Tyr719. * Antibodies in kit are custom formulations specific to kit. |
| 反应种属 | Human |
| 应用 | ELISA |
| 目标/特异性 | CSTs PathScan® Phospho-c-Kit (Tyr719) Sandwich ELISA Kit #7298 detects endogenous levels of c-Kit protein when phosphorylated at Tyr719. A significant induction of phosphorylation of c-Kit at Tyr719 is detected in SCF-treated H526 cells using PathScan® Phospho-c-Kit (Tyr719) Sandwich ELISA Kit #7298 (Figure 1). The level of total c-Kit protein in either nonphospho or phospho lysate detected by PathScan® Total c-Kit Sandwich ELISA Kit #7197 or Western analysis remain unchanged (Figure 1). This kit detects proteins from the indicated species, as determined through in-house testing, but may also detect homologous proteins from other species. |
| 供应商 | CST |
| 背景 | 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). |
| 存放说明 | 4C |
| 参考文献 | Martin, F.H. et al. (1990) Cell 63, 203-11. Yarden, Y. et al. (1987) EMBO J 6, 3341-51. Gommerman, J.L. et al. (1997) J Biol Chem 272, 30519-25. Sattler, M. et al. (1997) J Biol Chem 272, 10248-53. Nocka, K. et al. (1990) EMBO J 9, 1805-13. Hirota, S. et al. (1998) Science 279, 577-80. Blume-Jensen, P. et al. (2000) Nat Genet 24, 157-62. |
Figure 1. Treatment of H526 cells with SCF stimulates phosphorylation of c-Kit at Tyr719, detected by PathScan® Phospho-c-Kit (Tyr719) Sandwich ELISA Kit #7298, but does not affect the level of total c-Kit protein detected by PathScan® Total c-Kit Sandwich ELISA Kit #7197. The absorbance readings at 450 nm are shown in the top figure, while the corresponding Western blot using Phospho-c-Kit (Tyr719) Antibody #3391 (right panel) or c-Kit Antibody #3392 (left panel), is shown in the bottom figure. | |
Figure 2. The relationship between protein concentration of lysates from untreated and SCF-treated H526 lysates and the absorbance at 450 nm is shown. Cells (0.5x106 cells/ml) were serum starved overnight and then treated with SCF #9907 (40 ng/ml) for 5 min at 37°C. |
