Inositol phosphosphingolipids phospholipase essential for the coordination of cell wall formation. Responsible for the hydrolysis of the phosphosphingolipids (IPS), inositol phosphorylceramide (IPC), mannosylinositol phosphorylceramide (MIPC), and mannosyldiinositol phosphorylceramide (M(IP)2C). Lipid metabolism; sphingolipid metabolism. Belongs to the neutral sphingomyelinase family.