Actin-based motor molecule with ATPase activity that localizes to the mitochondrion outer membrane. Motor protein that moves towards the plus-end of actin filaments. Required for mitochondrial inheritance during mitosis. May be involved in mitochondrial transport or positioning. Myosin is a hexamer of 2 heavy chains and 4 light chains. The MyMOMA (MYO19-specific mitochondrial outer membrane-association) region mediates association with the mitochondrion outer membrane via electrostatic interaction. Belongs to the TRAFAC class myosin-kinesin ATPase superfamily. Myosin family.