Predicted to enable intermediate filament binding activity; phosphatase activity; and phosphatidylinositol binding activity. Involved in mitochondrion distribution; mitochondrion morphogenesis; and muscle cell cellular homeostasis. Acts upstream of or within negative regulation of cellular catabolic process; negative regulation of intracellular signal transduction; and positive regulation of skeletal muscle tissue growth. Located in I band. Is expressed in trunk unsegmented mesenchyme. Used to study centronuclear myopathy. Human ortholog(s) of this gene implicated in centronuclear myopathy X-linked and congenital structural myopathy. Orthologous to human MTM1 (myotubularin 1). [provided by Alliance of Genome Resources, Apr 2022]