Actin-based motor molecule with ATPase activity that localizes to the mitochondrion outer membrane (PubMed:19932026, PubMed:23568824, PubMed:25447992). Motor protein that moves towards the plus-end of actin filaments (By similarity). Required for mitochondrial inheritance during mitosis (PubMed:25447992). May be involved in mitochondrial transport or positioning (PubMed:23568824). {ECO:0000250|UniProtKB:Q5SV80, ECO:0000269|PubMed:19932026, ECO:0000269|PubMed:25447992, ECO:0000305|PubMed:23568824}. This is the function of Ensembl gene identifier ENSG00000278259 (MYO19, myosin XIX).