PRODUCT DESCRIPTION
Species :
HumanAssay Type :
Solid Phase Sandwich ELISASensitivity :
80 pg/mlDetection Range :
156-10,000 pg/mlAssay Length :
3.5hSample Type :
Serum; Plasma; Cell culture supernatant.Long Name :
Tropomyosin receptor kinase ASynonyms :
NTRK1; MTC; TRK; TRK1; TRKA; Trk-A; p140-TrkA; Neurotrophic receptor tyrosine kinase 1Background :
TrkA, the product of the protooncogene trk, is a member of the neurotrophic tyrosine kinase receptor family that has three members. TrkA, TrkB and TrkC preferentially bind NGF, NT-4 and BDNF, and NT-3, respectively. All Trk family proteins share a conserved complex subdomain organization consisting of a signal peptide, two cysteine-rich domains, a cluster of three leucine-rich motifs, and two immunoglobulin-like domains in the extracellular region, as well as an intracellular region that contains the tyrosine kinase domain.Two distinct TrkA isoforms that differ by virtue of a 6 amino acid insertion in their extracellular domain have been identified. The longer TrkA isoform is the only isoform expressed within neuronal tissues whereas the shorter TrkA is expressed mainly in non neuronal tissues. NGF binds to TrkA with low affinity and activates its cytoplasmic kinase, initiating a signaling cascade that mediates neuronal survival and differentiation. Higher affinity binding of NGF requires the coexpression of TrkA with the p75 NGF receptor (NGFR), a member of the tumor necrosis factor receptor superfamily. NGFR binds all neurotrophins with low affinity and modulates Trk activity as well as alters the specificity of Trk receptors for their ligands. NGFR can also mediate cell death when expressed independent of Trk.RELATED PRODUCTS
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REFERENCE LIBRARY
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