Catalyzes the formation of phosphatidylethanolamine (PtdEtn) from phosphatidylserine (PtdSer) (, ). Plays a central role in phospholipid metabolism and in the interorganelle trafficking of phosphatidylserine. May be involved in lipid droplet biogenesis at the endoplasmic reticulum membrane (By similarity).
Subcellular locations: Mitochondrion inner membrane
Subcellular locations: Mitochondrion inner membrane, Cytoplasm
Anchored to the mitochondrial inner membrane through its interaction with the integral membrane beta chain.
Subcellular locations: Mitochondrion inner membrane
Subcellular locations: Mitochondrion inner membrane, Lipid droplet
Predominantly localizes to lipid droplets in lipid-replete conditions, and to mitochondria in lipid-deplete conditions.