title: Ketomethyldipeptides II. Effect of modifications of the alpha-aminoketone portion on inhibition of angiotensin converting enzyme.
abstract: Results of an investigation aimed at identifying the consequences of chemical modifications of the alpha-aminoketone moiety of ketomethyldipeptides on angiotensin converting enzyme (ACE) inhibition are reported. These studies lead to the conclusion that within this series, the optimal structural backbone formulation for inhibition of ACE is represented by 1. Introduction of a Sar-Pro C-terminal dipeptide in this system, in contrast to other inhibitor classes, is compatible with potent inhibitory activity. Other structure-activity relationships for ketomethyldipeptides and related derivatives are presented, and speculations on possible modes of binding of these inhibitors to ACE, and on the question of ketone rehybridization are offered.
mesh_terms: D000806:Angiotensin-Converting Enzyme Inhibitors; D004151:Dipeptides / Q000138:chemical synthesis / Q000494:pharmacology*; D011485:Protein Binding; D013329:Structure-Activity Relationship
chemical_list: D000806:Angiotensin-Converting Enzyme Inhibitors; D004151:Dipeptides