Inhibition of phenylethanolamine N-methyltransferase (PNMT) by aromatic hydroxy-substituted 1,2,3,4-tetrahydroisoquinolines. Further studies on the hydrophilic pocket of the aromatic ring binding region of the active site
作者:Daniel J. Sall、Gary L. Grunewald
DOI:10.1021/jm00395a006
日期:1987.12
In a continuation of studies directed toward characterizing the hydrophilic pocket within the aromatic ring binding region of the active site of phenylethanolamine N-methyltransferase (PNMT), 5-, 6-, 7-, and 8-hydroxy-1,2,3,4-tetrahydroisoquinoline were prepared and evaluated as substrates and inhibitors of PNMT. In order to discern the necessity of an acidic hydrogen for interaction at this pocket
在针对表征苯乙醇胺N-甲基转移酶(PNMT),5-,6-,7-和8-羟基-1,2,3的活性位点的芳香环结合区域内的亲水性口袋进行的一系列研究中,制备了4-四氢异喹啉,并作为PNMT的底物和抑制剂进行了评估。为了辨别酸性氢在该口袋处相互作用的必要性,还评估了相应的甲基醚。7-羟基-1,2,3,4-四氢异喹啉(16)相对于四氢异喹啉(13)本身的亲和力增强表明,结合的四氢异喹啉中的碳C7存在亲水性口袋。相应的甲醚的亲和力降低与酸性氢原子在该位点与芳香族羟基相互作用的要求相一致(16)。从其他区域异构的芳族羟基取代的四氢异喹啉,其相应的甲基醚和6,7-二羟基-1,2,3,4-四氢异喹啉的相对活性来看,亲水口袋相对于结合的四氢异喹啉在空间上是致密的并且被更大范围的亲脂性特征所包围。为使本研究结果与以前有关结合的β-苯基乙胺,5-,6-,7-和8-羟基-exo-2-氨基苯并降冰片烯以及5-和6-羟基