function:Adapter protein that links FGR and NGF receptors to downstream signaling pathways. Involved in the activation of MAP kinases. Modulates signaling via SHC1 by competing for a common binding site on NTRK1. ,PTM:Phosphorylated on tyrosine residues upon stimulation by NGF. ,PTM:Ubiquitinated when tyrosine phosphorylated and in a complex with GRB2. The unphosphorylated form is not subject to ubiquitination. ,sequence caution:Translated as stop. ,similarity:Contains 1 IRS-type PTB domain. ,subcellular location:Cytoplasmic , membrane-bound. ,subunit:Part of a complex containing FRS2 , GRB2 and SOS1. Part of a complex containing GRB2 and CBL. Binds RET (By similarity) . Binds FGFR1 , SUC1 , NTRK1 , NTRK2 , NTRK3 and SRC. The tyrosine-phosphorylated protein binds the SH2 domains of GRB2 and PTPN11. ,tissue specificity:Highly expressed in heart , brain , spleen , lung , liver , skeletal muscle , kidney and testis. ,
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