Protein insertase that mediates insertion of transmembrane proteins into the mitochondrial outer membrane . Catalyzes insertion of proteins with alpha-helical transmembrane regions, such as signal-anchored, tail-anchored and multi-pass membrane proteins (By similarity). Does not mediate insertion of beta-barrel transmembrane proteins (By similarity). May play a role in apoptosis .
Subcellular locations: Mitochondrion outer membrane
Widely expressed with a predominant expression in brain.