Cell Signaling Technology

Product Pathways - Tyrosine Kinase / Adaptors

Phospho-FLT3 (Tyr842) (10A8) Rabbit mAb #4577

Applications Reactivity Sensitivity MW (kDa) Isotype
W IP H M Endogenous 160 Rabbit IgG

Applications Key:  W=Western Blotting  IP=Immunoprecipitation
Reactivity Key:  H=Human  M=Mouse
Species cross-reactivity is determined by western blot. Species enclosed in parentheses are predicted to react based on 100% sequence homology.

Protocols

Specificity / Sensitivity

Phospho-FLT3 (Tyr842) (10A8) Rabbit mAb detects endogenous levels of FLT3 only when phosphorylated at Tyr842. This antibody may cross-react with other tyrosine-phosphorylated family members.

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic phosphopeptide corresponding to the sequence surrounding Tyr842 of human FLT3.

Western Blotting

Western Blotting

Western blot analysis of cell extracts from SEM cells expressing constitutively activated FLT3 using Phospho-FLT3 (Tyr842) (10A8) Rabbit mAb (upper and middle). The middle blot was treated with calf intestinal phosphatase (CIP) before antibody probing. Total FLT3 (8F2) Rabbit mAb #3462 shown at the bottom.

Background

FMS-related tyrosine kinase 3 (FLT3, also called Flk2), is a member of the type III receptor tyrosine kinase family, which includes c-Kit, PDGFR and M-CSF receptors. FLT3 is expressed on early hematopoietic progenitor cells and supports growth and differentiation within the hematopoietic system (1,2). FLT3 is activated after binding with its ligand FL, which results in a cascade of tyrosine autophosphorylation and tyrosine phosphorylation of downstream targets (3). The p85 subunit of PI3 kinase, SHP2, GRB2 and Shc are associated with FLT3 after FL stimulation (4-6). Tyr589/591 is located in the juxtamembrane region of FLT3 and may play an important role in regulation of FLT3 tyrosine kinase activity. Somatic mutations of FLT3 consisting of internal tandem duplications (ITDs) occur in 20% of patients with acute myeloid leukemia (7).

Tyr842 is located in the activation loop of FLT3. Mutation of Tyr842 was identified in human AML patients (8).

  1. Shurin, M.R. et al. (1998) Cytokine Growth Factor Rev. 9, 37-48.
  2. Naoe, T. et al. (2001) Cancer Chemother. Pharmacol. 48 Suppl1, S27-S30.
  3. Namikawa, R. et al. (1996) Stem Cells 14, 388-395.
  4. Beslu, N. et al. (1996) J. Biol. Chem. 271, 20075-20081.
  5. Zhang, S. and Broxmeyer, H.E. (2000) Biochem. Biophys. Res. Commun. 277, 195-199.
  6. Zhang, S. et al. (1999) J. Leukoc. Biol. 65, 372-380.
  7. Mizuki, M. et al. (2000) Blood 96, 3907-3914.
  8. Kindler, T. et al. (2005) Blood 105, 335-340.

Application References

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Companion Products

Rabbit Monoclonals Produced Using Epitomics® Technology, U.S. Patent No. 5,675,063.

For Research Use Only. Not For Use In Diagnostic Procedures.

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