Outer mitochondrial translocase required to remove mislocalized tail-anchored transmembrane proteins on mitochondria (By similarity). Specifically recognizes and binds tail-anchored transmembrane proteins: acts as a dislocase that mediates the ATP-dependent extraction of mistargeted tail-anchored transmembrane proteins from the mitochondrion outer membrane (By similarity). Also plays a critical role in regulating the surface expression of AMPA receptors (AMPAR), thereby regulating synaptic plasticity and learning and memory (By similarity). [protein]-with a C-terminal TM segment(out) + ATP + H2O = [protein]-with a C-terminal TM segment(in) + ADP + H(+) + phosphate Belongs to the AAA ATPase family. MSP1 subfamily.