Novel antibacterial agents and potentiators of carbapenem antibiotics
申请人:Merck & Co., Inc.
公开号:EP0266978A2
公开(公告)日:1988-05-11
New 3-(1-aminoalkylphosphinyl)-(2-substituted)propionic acids are described which display antibacterial activity and potentiate carbapenem antibiotics.
Arimotensin-converting enzyme 2 (ACE2), a recently identified human homologue of angiotensin-converting enzyme, is a zinc metallocarboxypeptidase which may play a unique role in cardiovascular and renal function. Here we report the discovery of potent and selective inhibitors of ACE2, which have been identified by evaluating a series of phosphinic di- and tripeptides of the general formula: Z-Xaa(PO2-CH2)YaaOH and Ac-Zaa-Xaa(PO2-CH2)YaaOH. The most potent inhibitor in this series is a tripeptide that displays a K-i value of 0.4 nM toward ACE2 and is 3 orders of magnitude less potent toward carboxypeptidase A. Phosphinic tripeptides exhibit high potency exclusively when the Xaa position is occupied by a pseudoproline. A model of interaction between one inhibitor of this series and ACE2 suggests that the critical role played by a proline in inhibitors, but also for substrates hydrolysis, may rely on the presence of Tyr(510) in the ACE2 active site.