Nucleophilic substitution in glycerol derivatives. Part V. Formation of 1,3-diacylglycerol-2-phosphates in the reaction of 1,2-diacyl-3-iodoeoxy-rac-glycerol with silver dibenzyl phosphate

Enzyme affinity in the acylation of lysophosphatidylcholine

Analogues of 1-palmitoyl-sn-glycero-3-phosphorylcholine were used to ascertain the respective roles of the 1-palmitoyl-sn-glycero and choline groups in binding this substrate to the transferase catalyzing the acylation reaction. 1-Palmitoyl-sn-glycero-3-phosphorylhomocholine proved to be an effective competitive inhibitor whereas 1-palmitoyl-2-deoxyglycero-3-phosphorylcholine was totally ineffective. The data support the view that the 1-palmitoyl-sn-glycero group plays the major role in determining enzyme affinity whereas the choline group functions primarily in the subsequent steps of the acylation reaction.