It is involved in synaptogenesis (PubMed:25989451). Promotes excitatory synapse differentiation (By similarity). Suppresses neurite outgrowth (PubMed:14550773). Interacts with PTPRD; this interaction is PTPRD splicing-dependent and may induce pre-synaptic differentiation. In the adult, significant expression is detected only in the brain. Broadly expressed in embryonic brain with highest expression in ventricular layer, subventricular zone, cortical plate, pyramidal layer of hippocampus, subicular neuroepithelium, thalamus, hypothalumus and spinal cord. In the embryo, expressed from day 9-12 and continues through later gestational development and into adulthood. Belongs to the SLITRK family.