Enables identical protein binding activity; neutral sphingomyelin phosphodiesterase activity; and phospholipid binding activity. Involved in sphingomyelin metabolic process. Acts upstream of or within several processes, including animal organ development; enzyme linked receptor protein signaling pathway; and sphingolipid metabolic process. Located in Golgi cis cisterna and plasma membrane. Is expressed in several structures, including alimentary system; limb; nervous system; sensory organ; and skeleton. Used to study hypopituitarism; osteogenesis imperfecta; osteogenesis imperfecta type 2; and osteogenesis imperfecta type 3. Orthologous to human SMPD3 (sphingomyelin phosphodiesterase 3). [provided by Alliance of Genome Resources, Apr 2022]