Synthesis, Mechanism of Action, and Antiviral Activity of a New Series of Covalent Mechanism-Based Inhibitors of <i>S</i>-Adenosyl-<scp>l</scp>-Homocysteine Hydrolase
作者:Georges Guillerm、Danielle Guillerm、Corinne Vandenplas-Witkowki、Hélène Rogniaux、Nathalie Carte、Emmanuelle Leize、Alain Van Dorsselaer、Erik De Clercq、Christine Lambert
DOI:10.1021/jm0108350
日期:2001.8.1
placental AdoHcy hydrolase with 4, 5, or 6 resulted in time- and concentration-dependent inactivation of the enzyme (K(i): 45 +/- 0.5, 16 +/- 1, and 15 +/- 1 microM, respectively). Compound 4 caused complete conversion of the enzyme from its E-NAD(+) to E-NADH form during the inactivation process. This indicates that 4 is a substrate for the 3'-oxidative activity of AdoHcy hydrolase (type I inhibitor)
已经开发了制备5'-S-炔基-5'-硫代腺苷和5'-S-烯基-5'-硫代腺苷的直接方法。用甲醇钠和炔丙基溴处理受保护的5'-乙酰硫基5'-脱氧腺苷,然后脱保护,得到5'-S-炔丙基-5'-硫代腺苷4。在叔丁醇钠的叔丁醇钠控制下,碱催化将丁醇4定量转化为5'-S-烯基-5'-硫腺苷5或5'-S-丙炔基-5'-硫腺苷6。将重组人胎盘AdoHcy水解酶与4、5或6一起孵育-和酶的浓度依赖性失活(K(i):分别为45 +/- 0.5、16 +/- 1和15 +/- 1 microM)。在灭活过程中,化合物4导致酶从其E-NAD(+)完全转化为E-NADH形式。这表明4是AdoHcy水解酶(I型抑制剂)的3'-氧化活性的底物。相反,在5和6灭活过程中,酶的NAD(+)/ NADH含量不受影响,并且进一步研究了它们的灭活机理。在活性位点的5的S-烯丙硫基或6的S-丙炔基硫基上加酶隔离的水应导致形成相应