Synonyms:CG2 Background:Lipid phosphatase which dephosphorylates phosphatidylinositol 3-monophosphate(PI3P) and phosphatidylinositol 3,5-bisphosphate(PI(3,5)P2). Has also been shown to dephosphorylate phosphotyrosine-and phosphoserine-containing peptides. Negatively regulates EGFR degradation through regulation of EGFR trafficking from the late endosome to the lysosome. Plays a role in vacuolar formation and morphology. Regulates desmin intermediate filament assembly and architecture. Plays a role in mitochondrial morphology and positioning. Required for skeletal muscle maintenance but not for myogenesis.