Myo19 encodes a novel metazoan myosin. Myo19 is expressed in multiple tissues and cell lines. Myo19 localizes to mitochondria. Expressing GFP-Myo19 alters mitochondrial dynamics. Myo19 is a novel mitochondrial associated myosin that is likely to function in actin-based mitochondrial dynamics. 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 (By similarity). Required for mitochondrial inheritance during mitosis. May be involved in mitochondrial transport or positioning.