Conformationally defined adrenergic agents. 10. Binding orientation of amphetamine and norfenfluramine analogs in the benzonorbornene and benzobicyclo[3.2.1]octane ring systems at the active site of phenylethanolamine N-methyltransferase (PNMT)
作者:Gary L. Grunewald、Kimberly M. Markovich、Daniel J. Sall
DOI:10.1021/jm00395a005
日期:1987.12
anti-9-amino-6-(trifluoromethyl) benzonorbornene (19), were prepared and evaluated. The competitive inhibition displayed by the fully extended analogue 12 coupled with the uncompetitive kinetics exhibited by the folded isomer 13 supports previous findings that a fully extended side chain conformation is optimal for binding to the active site of PNMT. In addition, the fact that 12 displayed enhanced affinity as an
在旨在表征在苯乙醇胺N-甲基转移酶(PNMT),抗-10-氨基-(12)和syn-10-amino-5,6,7的活性位点结合β-苯乙胺的构象基础的继续研究中制备了8,8-四氢-5,8-甲醇-9H-苯并环庚烯(13),并作为PNMT的底物和抑制剂进行了评估。这些构象定义的苯丙胺类似物可模拟2-氨基四氢萘(2AT)的低能半椅形式。此外,为了确定带有芳基亲脂性取代基的β-苯基乙胺的活性位点结合方向,用芳基三氟甲基取代的衍生物12和13(20-27),以及抗9-氨基-5-(三氟甲基)制备并评估了-(18)和抗-9-氨基-6-(三氟甲基)苯并降冰片烯(19)。由完全延伸的类似物12表现出的竞争性抑制作用与由折叠的异构体13表现出的非竞争性动力学相结合,支持了先前的发现,即完全延伸的侧链构象对于结合至PNMT的活性位点而言是最佳的。另外,与苯并降冰片烯和1,4-乙萘环系统中的β-苯乙胺对应物相比,12