Structure−Activity Study of New Inhibitors of Human Betaine-Homocysteine <i>S</i>-Methyltransferase
作者:Václav Vaněk、Miloš Buděšínský、Petra Kabeleová、Miloslav Šanda、Milan Kožíšek、Ivona Hančlová、Jana Mládková、Jiří Brynda、Ivan Rosenberg、Markos Koutmos、Timothy A. Garrow、Jiří Jiráček
DOI:10.1021/jm8015798
日期:2009.6.25
BHMT inhibitors. The inhibitors were designed to mimic the hypothetical transition state of BHMT substrates and consisted of analogues with NH, N(CH3), or N(CH3)2 groups separated from the homocysteine sulfur atom by a methylene, ethylene, or a propylene spacer. Only the inhibitor with the N(CH3) moiety and ethylene spacer gave moderate inhibition. This result led us to prepare two inhibitors lacking
甜菜碱高半胱氨酸小号-methyltransferase(BHMT)催化甲基从甜菜碱转移到1-高半胱氨酸,得到二甲基甘氨酸和升-甲硫氨酸。在这项研究中,我们制备了一系列新的 BHMT 抑制剂。这些抑制剂旨在模拟 BHMT 底物的假设过渡态,由具有 NH、N(CH 3 ) 或 N(CH 3 ) 2基团的类似物组成,这些基团通过亚甲基、亚乙基或丙烯间隔基与同型半胱氨酸硫原子隔开. 只有具有 N(CH 3 ) 部分和乙烯间隔基的抑制剂产生中等抑制作用。这一结果促使我们制备了两种在S 中缺少氮原子的抑制剂。-连接的烷基链:( RS , RS )-5-(3-氨基-3-羧基丙硫基)-3-甲基戊酸和( RS )-5-(3-氨基-3-羧基丙硫基)-3,3-二甲基戊酸. 这两种化合物都是 BHMT 的高效抑制剂。BHMT 不能耐受这些抑制剂中真正的甜菜碱模拟物,尤其是氮原子的发现令人惊讶,并引发了关于 BHMT