Channel-forming protein essential for import of protein precursors into mitochondria (, ). Plays a role in the assembly of the mitochondrial membrane respiratory chain NADH dehydrogenase (Complex I) by forming a complex with BCAP31 and mediating the translocation of Complex I components from the cytosol to the mitochondria .
Subcellular locations: Mitochondrion outer membrane
Associates with the mitochondria-associated ER membrane via interaction with BCAP31.