It is involved in synaptogenesis and promotes excitatory synapse differentiation. Enhances neuronal dendrite outgrowth. Can form homodimers; homodimerization requires repeat LRR 2. Interacts with YWHAB, YWHAE, YWHAG, YWHAH, SFN, YWHAQ and YWHAZ. Undergoes proteolytic cleavage that results in shedding of the ectodomain and cleavage of the C-terminal cytoplasmic tail. Glycosylated. Phosphorylation at Ser-695 is necessary for proper function in promoting neurite outgrowth. Belongs to the SLITRK family.