Small Sequence‐Sensitive Compounds for Specific Recognition of the G⋅C Base Pair in DNA Minor Groove
作者:Abdelbasset A. Farahat、Pu Guo、Hadir Shoeib、Ananya Paul、David W. Boykin、W. David Wilson
DOI:10.1002/chem.201904396
日期:2020.4.6
series of small size diamidines with thiophene and modified N -alkylbenzimidazole σ-hole module represent specific binding to single G·C basepair (bp) DNAsequence. The variation of N -alkyl or aromatic rings were sensitive to microstructure of DNAminorgroove. Thirteen new compounds were synthesized to test their binding affinity and selectivity. The dicyanobenzimidazoles needed to synthesize the
一系列新型小尺寸二脒与噻吩和修饰的 N-烷基苯并咪唑 σ 孔模块代表与单个 G·C 碱基对 (bp) DNA 序列的特异性结合。N-烷基或芳香环的变化对DNA小沟的微观结构敏感。合成了十三种新化合物来测试它们的结合亲和力和选择性。合成目标二脒所需的二氰基苯并咪唑是通过不同醛与不同3-氨基-4-(烷基-或苯基-氨基)苯甲腈的缩合/环化反应制备的。最终的二脒使用双三甲基甲硅烷基氨基锂(LiN[Si(CH 3 ) 3 ] 2 )或Pinner方法合成。通过生物传感器-SPR、荧光光谱、DNA热熔解、ESI-MS光谱、圆二色性和分子动力学等多种生物物理方法研究,与相似序列AAATTT和AAAGCTTT相比,新合成的化合物对AAAGTTT表现出很强的结合力和选择性。荧光光谱测定的结合亲和力结果与生物传感器-SPR获得的结果一致。这些小尺寸单 G·C bp 高度特异性结合物扩展了未来生物应用的化合物数据库。
Model systems for flavoenzyme activity: an investigation of the role functionality attached to the C(7) position of the flavin unit has on redox and molecular recognition properties
作者:Stuart T. Caldwell、Louis J. Farrugia、Shanika Gunatilaka Hewage、Nadiya Kryvokhyzha、Vincent M. Rotello、Graeme Cooke
DOI:10.1039/b900269n
日期:——
We describe the role functionality attached to the C(7) position of a family of flavin derivatives has in tuning their redox and recognition properties and the subsequent exploitation of two of these derivatives as a three-component electrochemically controllable molecular switch.