Highly-conserved N-terminally anchored AAA-ATPase; distributed in the mitochondrial outer membrane and peroxisomes; involved in mitochondrial protein sorting; ATP-driven extractase that pulls mislocalized tail-anchored proteins into the cytosol, passing them to the GET pathway for transfer to the ER membrane for degradation, ensuring fidelity of organelle-specific localization of tail-anchored proteins; contains an N-terminal transmembrane domain and C-terminal cytoplasmic ATPase domain