Cell Signaling Technology

Product Pathways - Tyrosine Kinase / Adaptors

c-Cbl Antibody #2747

Applications Reactivity Sensitivity MW (kDa) Source
W IP IF-IC H M R Mk (B) Endogenous 120 Rabbit

Applications Key:  W=Western Blotting  IP=Immunoprecipitation  IF-IC=Immunofluorescence (Immunocytochemistry)
Reactivity Key:  H=Human  M=Mouse  R=Rat  Mk=Monkey  B=Bovine
Species cross-reactivity is determined by western blot. Species enclosed in parentheses are predicted to react based on 100% sequence homology.

Protocols

Specificity / Sensitivity

This antibody detects endogenous levels of total c-Cbl protein. The antibody may also cross-react with Cbl-b protein.

Source / Purification

Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to the carboxy terminus of human c-Cbl. Antibodies are purified by protein A and peptide affinity chromatography.

Western Blotting

Western Blotting

Western blot analysis of lysates from MCF-7, Raji, THP-1, RAW, COS and H-4-II-E cells, using c-CBL antibody.

IF-IC

IF-IC

Immunofluorescent staining of paraformaldehyde-fixed RAW cells, using c-CBL antibody.

Background

The c-Cbl proto-oncogene is a ubiquitously expressed cytoplasmic adaptor protein that is especially predominant in hematopoietic cells (1,2). c-Cbl is rapidly tyrosine-phosphorylated in response to stimulation of a variety of cell-surface receptors and becomes associated with a number of intracellular signaling molecules such as protein tyrosine kinases, phosphatidylinositol-3 kinase, Crk, and 14-3-3 proteins (3,4). c-Cbl possesses a highly conserved amino-terminal phosphotyrosine binding domain (TKB) and a C3HC4 RING finger motif. The TKB recognizes phosphorylated tyrosines on activated receptor tyrosine kinases (RTKs) as well as other nonreceptor tyrosine kinases. The RING finger motif recruits ubiquitin-conjugating enzymes. These two domains are primarily responsible for the ubiquitin ligase activity of c-Cbl and downregulation of RTKs (3). Research studies have indicated that in human cancer tissues, c-Cbl is frequently tyrosine-phosphorylated in a tumor-specific manner (5). Phosphorylation of Tyr731 of c-Cbl provides a docking site for downstream signaling components such as p85 and Fyn (6).

  1. Blake, T.J. et al. (1991) Oncogene 6, 653-657.
  2. Thien, C.B. and Langdon, W.Y. (1998) Immunol. Cell Biol. 76, 473-482.
  3. Christine, B.F. et al. (2001) Nat. Rev. Mol. Cell Biol. 2, 294-307.
  4. Feshchenko, E.A. et al. (1998) J. Biol. Chem. 273, 8323-8331.
  5. Kamei, T. et al. (2000) Int. J. Oncol. 17, 335-339.
  6. Hunter, C. et al. (1999) J. Biol. Chem. 274, 2097-2106.

Application References

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Companion Products

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

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