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. May interact with DAZAP2, FAM168A, PRDX6, RBM6, TMTC1 and YPEL2. Interacts with CDC27. Expressed in neuronal cell bodies and axonal fibers. N-glycosylated. Belongs to the FAM168 family.