Synthesis and Molecular Modelling of Double-Functionalised Nucleosides with Aromatic Moieties in the 5′-(S)-Position and Minor Groove Interactions in DNA Zipper Structures
作者:Khalil Isak Shaikh、Charlotte Stahl Madsen、Lise Junker Nielsen、Anna Søndergaard Jørgensen、Henrik Nielsen、Michael Petersen、Poul Nielsen
DOI:10.1002/chem.201001253
日期:2010.11.15
showed that the aromatic moieties in some cases interact in the minor groove forming DNA zipper structures. The strongest specific interaction was found between two thymines or between a thymine and a phenyl group in a crossed (−3)‐zipper motif (i.e., with two base pairs interspacing the modifications). Modelling revealed that the interaction is aromatic stacking across the minor groove. Also, the extended
一系列六个双功能化核苷,其中在5'-(S)-C中插入了芳香族部分位置,已合成并整合到DNA双链体中。芳香族部分为胸腺嘧啶-1-基,苯基,1,2,3-三唑-1-基,1,2,3-三唑-4-基,4-(尿嘧啶-5-基)1,2, 3-三唑-1-基和4-苯基1,2,3-三唑-1-基。用紫外线熔解曲线,CD光谱和分子建模研究了DNA双链体。结果表明,在某些情况下,芳族部分在形成DNA拉链结构的小沟中相互作用。发现两个胸腺嘧啶之间或胸腺嘧啶与苯基之间的最强特异性相互作用是在交叉的(-3)-拉链基序中(即,两个碱基对在修饰之间进行间隔)。建模显示,相互作用是整个小沟槽之间的芳香堆积。同样,扩展的尿嘧啶-三唑部分在小沟中表现出拉链接触,并与沟底结合。