L-serine-phosphatidylethanolamine phosphatidyltransferase (, phosphatidylserine synthase 2, serine-exchange enzyme II, PTDSS2 (gene)) is an enzyme with systematic name L-1-phosphatidylethanolamine:L-serine phosphatidyltransferase. This enzyme catalyses the following chemical reaction
This enzyme catalyses replacement of a polar head group of phosphatidylethanolamine with L-serine.