Design, Synthesis, and Evaluation of 9-<scp>d</scp>-Ribityl-1,3,7-trihydro-2,6,8-purinetrione, a Potent Inhibitor of Riboflavin Synthase and Lumazine Synthase
作者:Mark Cushman、Donglai Yang、Klaus Kis、Adelbert Bacher
DOI:10.1021/jo010706r
日期:2001.12.1
compound was cyclized to 9-D-ribityl-1,3,7-trihydropurine-2,6,8-trione (13), which was found to be a relatively potent inhibitor of both Escherichia coli riboflavin synthase (K(i) 0.61 microM) and Bacillus subtilis lumazine synthase (K(i) 46 microM). Molecular modeling of the lumazine synthase-inhibitor complex indicated the possibility for hydrogen bonding between the Lys135 epsilon-amino group of the
还原5-硝基-6-D-核糖基氨基尿嘧啶(9),得到5-氨基-6-D-核糖基氨基尿嘧啶(1),其与氯甲酸乙酯反应生成5-乙基氨基甲酰基-6-D-核糖基氨基尿嘧啶(12)。将后者化合物环化成9-D-ribityl-1,3,7-三氢嘌呤-2,6,8-三酮(13),发现它是两种大肠杆菌核黄素合酶(K(i )0.61 microM)和枯草芽孢杆菌lumazine合酶(K(i)46 microM)。LUM嗪合酶-抑制剂复合物的分子模型表明该酶的Lys135ε-氨基与配体的8-酮基和4'-羟基均存在氢键结合的可能性。核黄素合酶催化反应的双底物类似物1,4-双[1-(9-D-ribityl-1,3,7-三氢嘌呤-2,6,8-三酰基)]丁烷(18),