Probable acyltransferase which may mediate the conversion of lysophosphatidylcholine (1-acyl-sn-glycero-3-phosphocholine or LPC) into phosphatidylcholine (1,2-diacyl-sn-glycero-3-phosphocholine or PC) (LPCAT activity). May also catalyze the conversion of lysophosphatidylethanolamine (1-acyl-2-hydroxy-sn-glycero-3-phosphoethanolamine or LPE) into phosphatidylethanolamine (1,2-diacyl-sn-glycero-3-phosphoethanolamine or PE) (LPEAT activity), as well as the conversion of lysophosphatidylserine (1-acyl-2-hydroxy-sn-glycero-3-phospho-L-serine or LPS) into phosphatidylserine (1,2-diacyl-sn-glycero-3-phospho-L-serine or PS) (LPSAT activity). Required for incorporation of arachidonic acid into PC, PE, and PS. a 1-acyl-sn-glycero-3-phosphocholine + an acyl-CoA = a 1,2-diacyl-sn-glycero-3-phosphocholine + CoA a 1-acyl-sn-glycero-3-phospho-L-serine + an acyl-CoA = a 1,2-diacyl-sn-glycero-3-phospho-L-serine + CoA a 1-acyl-sn-glycero-3-phosphoethanolamine + an acyl-CoA = a 1,2-diacyl-sn-glycero-3-phosphoethanolamine + CoA Lipid metabolism; phospholipid metabolism. The di-lysine motif may confer endoplasmic reticulum localization. Belongs to the membrane-bound acyltransferase family.