Multifunctional protein with enzymatic and transport activities (PubMed:17105775, PubMed:26394711, PubMed:32005660, PubMed:33483563). Probable NADPH-dependent quinone oxidoreductase which physiological substrates and function are unclear (PubMed:33483563). Alternatively, has also been suggested to mediate the transfer of negatively charged phospholipids including phosphatidic acid (PA), phosphatidylserine (PS) and phosphatidylglycerol (PG) between endoplasmic reticulum and mitochondrial membranes (PubMed:26394711, PubMed:32005660). Could regulate mitochondrial fusion through its interaction with mitofusins (PubMed:17105775). {ECO:0000269|PubMed:17105775, ECO:0000269|PubMed:26394711, ECO:0000269|PubMed:32005660, ECO:0000269|PubMed:33483563}. This is the function of ENSG00000108828 (VAT1, vesicle amine transport 1).