Differences in Backbone Structure between Angiotensin II Agonists and Type I Antagonists
作者:John M. Matsoukas、George Agelis、Amal Wahhab、John Hondrelis、Dimitris Panagiotopoulos、Raghav Yamdagni、Qiao Wu、Thomas Mavromoustakos、Hernani L. S. Maia
DOI:10.1021/jm00023a005
日期:1995.11
ANGII type I antagonists [HSer(gamma-OMe)8]ANGII and [Sar1Nva(delta-OMe)8]ANGII in DMSO by 1D-NOE spectroscopy revealed that the Tyr-Ile-His bend, a conformational property found in ANGII and [Sar1]ANGII (J. Biol. Chem. 1994, 269, 5303) is not present in type I antagonists, providing for the first time an important conformational difference between angiotensin II agonists and type I antagonists.
通过固相方法制备了在位置8具有O-甲基-L-高丝氨酸[HSer(γ-OMe)]和δ-甲氧基-L-正缬氨酸[Nva(delta-OMe)]的I型血管紧张素II拮抗剂,通过反相HPLC纯化,并在大鼠子宫中进行生物测定,并通过核Overhauser效应(NOE)光谱研究了它们的骨架构象性质。[Sar1,HSer-(γ-OMe)8] ANGII,[HSer(γ-OMe)8] ANGII,[Des1,HSer(γ-OMe)8] ANGII,[Sar1,Nva(delta-OMe)8]- ANGII和[Des1,Nva(delta-OMe)8] ANGII分别具有以下拮抗剂活性pA2:7.6、7.5,<6.0、7.1和6.9。[Sar1] ANGII与δ-羟基-L-正缬氨酸[Nva(delta-OH)],δ-甲氧基-L-正缬氨酸[Nva(delta-OMe)],4'-羧基苯丙氨酸[Phe(4'-COO