May play a role in a mitochondrial network organization typical for stem cells, characterized by reduced mitochondrial metabolism, low mtDNA copies and fragmentated mitochondrial network. may act by suppressing ATAD3A function, interfering with ATAD3A interaction with matrix nucleoid complexes. Forms heterooligomers with ATAD3A. Interacts with components of the mitochondrial ribosome, including MRPL11 and MRPS18B, and with other proteins involved in mitochondrial RNA metabolism, possibly via interaction with ATAD3A. Interacts with GADD45GIP1. Has been found to co-purify with nucleoids (PubMed:22453275). Since it does not face the mitochondrial matrix, the association with nucleoids could be mediated by ATAD3A. Tends to be down-regulated in differentiated cells and re-expressed in pluripotent stem cells or cancer cells (at protein level). Expressed in proliferating embryonic stem cells and down-regulated during differentiation. Up-regulated by MYC. Belongs to the AAA ATPase family. Extended N-terminus.