Positively stimulates PRMT1-induced protein arginine methylation (By similarity). Involved in skeletal homeostasis (PubMed:27777970). Positively regulates lysosome peripheral distribution and ruffled border formation in osteoclasts (PubMed:27777970). Interacts (via N- and C-terminus) with DDX1 (By similarity). Interacts (via N- and C-terminus) with C14orf166 (By similarity). Interacts with FAM98B (By similarity). Interacts with PLEKHM1 (via N- and C-terminus) (PubMed:27777970). Belongs to the FAM98 family.