Involved in the translational repression of cytoplasmic polyadenylation element (CPE)-containing mRNAs. Interacts with CPEB1 and EIF4E. Detected in axons, dendrites and filopodia. Colocalized with EIF4E in neurites. Translocated from nucleolus to nuclear foci in response to UV damage (By similarity). Belongs to the SAS10 family.