Alternative products:Additional isoforms seem to exist ,Catalytic activity:ATP + a [protein]-L-tyrosine = ADP + a [protein]-L-tyrosine phosphate. ,Function:Receptor for neurotrophin-3 (NT-3) . This is a tyrosine-protein kinase receptor. Known substrates for the trk receptors are SHC1 , PI-3 kinase , and PLCG1. The different isoforms do not have identical signaling properties. ,PTM:Ligand-mediated auto-phosphorylation. ,similarity:Belongs to the protein kinase superfamily. Tyr protein kinase family. Insulin receptor subfamily. ,similarity:Contains 1 protein kinase domain. ,similarity:Contains 2 Ig-like C2-type (immunoglobulin-like) domains. ,similarity:Contains 2 LRR (leucine-rich) repeats. ,subunit:Exists in a dynamic equilibrium between monomeric (low affinity) and dimeric (high affinity) structures. Binds SH2B2. Interacts with SQSTM1 and KIDINS220. ,tissue specificity:Widely expressed but mainly in nervous tissue. Isoform B is expressed at higher levels in adult brain than in fetal brain. ,
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