6-Anilinouracil-Based Inhibitors of <i>Bacillus </i><i>s</i><i>ubtilis</i> DNA Polymerase III: Antipolymerase and Antimicrobial Structure−Activity Relationships Based on Substitution at Uracil N3
作者:Paul M. Tarantino,、Chengxin Zhi、Joseph J. Gambino、George E. Wright、Neal C. Brown
DOI:10.1021/jm980693i
日期:1999.6.1
analogues which selectively inhibit the DNA polymerase III of Bacillus subtilis and other Gram-positive bacteria. To enhance the potential of the 6-AUs as antimicrobial agents, a structure-activity relationship was developed involving substitutions of the uracil N3 position in two 6-AU platforms: 6-(3,4-trimethyleneanilino)uracil (TMAU) and 6-(3-ethyl-4-methylanilino)uracil (EMAU). Series of N3-alkyl
6-苯胺尿嘧啶(6-AUs)是dGTP类似物,可选择性抑制枯草芽孢杆菌和其他革兰氏阳性细菌的DNA聚合酶III。为了增强6-AUs作为抗菌剂的潜力,开发了一种结构-活性关系,涉及两个6-AU平台中的尿嘧啶N3位置取代:6-(3,4-三亚甲基苯胺基)尿嘧啶(TMAU)和6- (3-乙基-4-甲基苯胺基)尿嘧啶(EMAU)。合成了两个6-AU的一系列N3-烷基衍生物,并测试了它们抑制纯化的枯草芽孢杆菌DNA聚合酶III和培养中枯草芽孢杆菌生长的能力。烷基的大小从乙基到己基不等,可以增强两个平台结合聚合酶的能力,除己基外,它们还可以显着增强其抗菌效力。用更多的亲水性羟烷基和甲氧基烷基基团对EMAU平台进行N3取代,虽然略微提高了抗聚合酶III的活性,但其抗菌效力却提高了数倍。总而言之,这些研究的结果表明6-茴香胺嘧啶的环N3可以耐受相当大的尺寸和结构变化的取代基,因此可以被操纵以显着增强这种新型