Structure, DNA minor groove binding, and base pair specificity of alkyl- and aryl-linked bis(amidinobenzimidazoles) and bis(amidinoindoles)
作者:Terri A. Fairley、Richard R. Tidwell、Isaac Donkor、Noreen A. Naiman、Kwasi A. Ohemeng、Richard J. Lombardy、James A. Bentley、Michael Cory
DOI:10.1021/jm00064a008
日期:1993.6
A series of bis(amidinobenzimidazoles) and bis(amidinoindoles) with varied linking chains connecting the aromatic groups and various modifications to the basic amidino groups have been prepared. The calf thymus (CT) DNA and nucleic acid homopolymer [poly(dA).poly(dT),poly(dA-dT).poly-(dA-dT), and poly(dG-dC).poly(dG-dC)] binding properties of these compounds have been studied by thermal denaturation
已经制备了一系列具有变化的连接链的双(ami基苯并咪唑)和双(ami基吲哚),所述连接链连接芳族基团并且对碱性a基进行了各种修饰。小牛胸腺(CT)DNA和核酸均聚物[poly(dA).poly(dT),poly(dA-dT).poly-(dA-dT)和poly(dG-dC).poly(dG-dC) )]已经通过热变性(ΔTm)和粘度研究了这些化合物的结合性能。该化合物对poly(dA).poly(dT)和poly(dA-dT).poly(dA-dT)的亲和力大于对poly(dG-dC).poly(dG-dC)的亲和力。粘度滴定表明该化合物不通过嵌入结合。分子模型研究和生物物理数据表明,分子与CT DNA和均聚物的小沟结合。分子形状的分析与这种核酸结合模式一致。与苯并咪唑环相连的亚甲基数量为偶数的化合物比亚甲基数量为奇数的化合物对DNA的亲和力更高。确定分子中四个定义的基团的曲率半径的分子模