ATPase that regulates mitochondrial ABC transporters ABCB7, ABCB8/MITOSUR and ABCB10 (PubMed:25063848). Regulates mitochondrial ferric concentration and heme biosynthesis and plays a role in the maintenance of mitochondrial homeostasis and cell survival (PubMed:25063848). ATP + H2O = ADP + H(+) + phosphate Homodimer (PubMed:25063848). Interacts with ABCB7, ABCB8/MITOSUR and ABCB10 (PubMed:25063848).