caution:Lacks the phosphocysteine intermediate Cys active site in position 391 that is replaced by a Glu residue, preventing the hydrolase activity.,function:Inactive phosphatase that plays a role as an adapter for the phosphatase myotubularin to regulate myotubularin intracellular location.,miscellaneous:Catalytically inactive phosphatase.,similarity:Belongs to the protein-tyrosine phosphatase family. Non-receptor class myotubularin subfamily.,similarity:Contains 1 myotubularin phosphatase domain.,subcellular location:Localizes to punctate vesicles when associated with MTM1.,subunit:Interacts with myotubularin MTM1 and myotubularin-related MTMR2.,tissue specificity:Ubiquitous with prominent expression in brain, heart, kidney, placenta, and lung.,
Cytoplasm . Sarcoplasmic reticulum . Cytoplasm, myofibril, sarcomere . Localizes to punctate vesicles when associated with MTM1 (PubMed:12847286). Localizes to triads, a structure formed by a T tubule and two sarcoplasmic reticulum terminal cisterna (By similarity). In skeletal muscles, co-localizes with MTM1 in the sarcomere (By similarity). Partially localizes to the sarcoplasmic reticulum in skeletal muscles (By similarity). .
Expressed in skeletal muscles (at protein level) (PubMed:23818870). Ubiquitous with prominent expression in brain, heart, kidney, placenta, and lung (PubMed:11504939).