ATPase that regulates mitochondrial ABC transporters ABCB7, ABCB8/MITOSUR and ABCB10. Regulates mitochondrial ferric concentration and heme biosynthesis and plays a role in the maintenance of mitochondrial homeostasis and cell survival. ATP + H2O = ADP + H(+) + phosphate Homodimer. Interacts with ABCB7, ABCB8/MITOSUR and ABCB10.