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Phospho-TrkA (Tyr674/675) Antibody #9144

Inquiry Info. # 9144

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    Product Specifications

    REACTIVITY
    SENSITIVITY
    MW (kDa) 140
    SOURCE Rabbit

    Product Information

    Storage

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

    Specificity / Sensitivity

    Phospho-TrkA (Tyr674/675) Antibody detects endogenous levels of Trk only when activated by phosphorylation at Tyr674/675. This antibody can also detect the corresponding residues of phosphorylated TrkB and TrkC.

    Source / Purification

    Polyclonal antibodies are produced by immunizing animals with a synthetic phosphopeptide corresponding to residues around Tyr674/675 of human TrkA. Antibodies are purified by protein A and peptide affinity chromatography.

    Background

    The family of Trk receptor tyrosine kinases consists of TrkA, TrkB, and TrkC. While the sequence of these family members is highly conserved, they are activated by different neurotrophins: TrkA by NGF, TrkB by BDNF or NT4, and TrkC by NT3 (1). Neurotrophin signaling through these receptors regulates a number of physiological processes, such as cell survival, proliferation, neural development, and axon and dendrite growth and patterning (1). In the adult nervous system, the Trk receptors regulate synaptic strength and plasticity. TrkA regulates proliferation and is important for development and maturation of the nervous system (2). Phosphorylation at Tyr490 is required for Shc association and activation of the Ras-MAP kinase cascade (3,4). Residues Tyr674/675 lie within the catalytic domain, and phosphorylation at these sites reflects TrkA kinase activity (3-6). Point mutations, deletions, and chromosomal rearrangements (chimeras) cause ligand-independent receptor dimerization and activation of TrkA (7-10). TrkA is activated in many malignancies including breast, ovarian, prostate, and thyroid carcinomas (8-13). Research studies suggest that expression of TrkA in neuroblastomas may be a good prognostic marker as TrkA signals growth arrest and differentiation of cells originating from the neural crest (10).

    Alternate Names

    DKFZp781I14186; gp140trk; High affinity nerve growth factor receptor; MTC; neurotrophic receptor tyrosine kinase 1; Neurotrophic tyrosine kinase receptor type 1; neurotrophic tyrosine kinase, receptor, type 1; NTRK1; Oncogene TRK; p140-TrkA; TRK; Trk-A; TRK1; TRK1-transforming tyrosine kinase protein; TRKA; Tropomyosin-related kinase A; Tyrosine kinase receptor; tyrosine kinase receptor A

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