Function:Signaling adapter that couples activated growth factor receptors to signaling pathway in neurons. Involved in the signal transduction pathways of neurotrophin-activated Trk receptors in cortical neurons. ,PTM:Tyrosine phosphorylated. ,similarity:Contains 1 PID domain. ,similarity:Contains 1 SH2 domain. ,subunit:Interacts with the Trk receptors in a phosphotyrosine-dependent manner. Once activated , binds to GRB2. Interacts with activated EGF receptors. ,tissue specificity:Mainly expressed in brain. Hardly detectable in other tissues , except in pancreas. Highly expressed in the cerebral cortex , frontal and temporal lobes , occipital pole , hippocampus , caudate nucleus and amygdala. Expressed at low level in the cerebellum , medulla and spinal cord. ,
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