Conformational Studies of 4-N-Carbamoyldeoxycytidine Derivatives and Synthesis and Hybridization Properties of Oligodeoxyribonucleotides Incorporating these Modified Bases
作者:Kenichi Miyata、Akio Kobori、Ryuji Tamamushi、Akihiro Ohkubo、Haruhiko Taguchi、Kohji Seio、Mitsuo Sekine
DOI:10.1002/ejoc.200501006
日期:2006.8
stable Watson–Crick base pair can be formed with the guanine base at the opposite site. It should be noted that the base recognition ability (G against T, C and A) of these modified cytosine bases can be preserved satisfactorily. These results suggest that the 4-N-carbamoyl group is useful as a backbone structure of the linker between various functional residues and oligonucleotides. (© Wiley-VCH Verlag
合成了在 4-氨基上用各种 N-取代的氨基甲酰基基团修饰的脱氧胞苷衍生物。详细的 1H NMR 研究表明,3',5'-O-二甲硅烷基化 N-氨基甲酰基脱氧胞苷衍生物 11 作为一种在 MeOD 中的 N3 原子和羰基氧原子之间具有分子内氢键的物种存在,但在加入 CDCl3 后,具有分子间氢键的同型二聚体物种的数量逐渐增加。还合成了掺入各种 4-N-氨基甲酰基脱氧胞苷衍生物的寡脱氧核糖核苷酸。这些修饰的寡脱氧核苷酸可以与互补链杂交,而不会干扰 DNA 双链体的结构,因此改变氨基甲酰基的方向,使得稳定的沃森-克里克碱基对可以与相反位点的鸟嘌呤碱基形成。应当指出的是,这些修饰的胞嘧啶碱基的碱基识别能力(G对T、C和A)可以令人满意地保留。这些结果表明,4-N-氨基甲酰基可用作各种功能残基和寡核苷酸之间接头的骨架结构。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451