Myotubularin (MTM1)

Lipid phosphatase that dephosphorylates phosphatidylinositol 3-monophosphate (PI3P) and phosphatidylinositol 3,5-bisphosphate (PI(3,5)P2) (PubMed:11001925, PubMed:10900271, PubMed:12646134, PubMed:14722070). Has also been shown to dephosphorylate phosphotyrosine- and phosphoserine-containing peptides (PubMed:9537414).

Negatively regulates EGFR degradation through regulation of EGFR trafficking in the late endosome to the lysosome (PubMed:14722070). Plays a role in vacuolar formation and morphology.