Catalyzes the formation of phosphatidylethanolamine (PtdEtn) from phosphatidylserine (PtdSer) . Plays a central role in phospholipid metabolism and in the interorganelle trafficking of phosphatidylserine.
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Cellular Localization:
[Phosphatidylserine decarboxylase beta chain]: Mitochondrion inner membrane ; Single-pass membrane protein ; Intermembrane side .; [Phosphatidylserine decarboxylase alpha chain]: Mitochondrion inner membrane ; Peripheral membrane protein ; Intermembrane side . Anchored to the mitochondrial inner membrane through its interaction with the integral membrane beta chain. .