Inhibitor of neuronal axonal outgrowth. Acts as a negative regulator of CDC42 and STAT3 and a positive regulator of STMN2. Positive regulator of CDC27. May form homodimers (By similarity). May interact with DAZAP2, FAM168A, PRDX6, RBM6, TMTC1 and YPEL2 (By similarity). Interacts with CDC27 (PubMed:20716133). In cortical neurons, predominantly found at perinuclear regions. Expressed in neuronal cell bodies and axonal fibers. N-glycosylated. Belongs to the FAM168 family.