CG base pair recognition within DNA triple helices by modified N-methylpyrrolo-dC nucleosides
作者:Simon R. Gerrard、Mastoura M. Edrees、Imenne Bouamaied、Keith R. Fox、Tom Brown
DOI:10.1039/c0ob00119h
日期:——
3-Aminophenyl-modified analogues of the bicyclic nucleoside N-methyl-3H-pyrrolo[2,3-d]pyrimidin-2(7H)-one were synthesised and incorporated directly into triplex-forming oligonucleotides in order to utilise their extended hydrogen bonding motif for recognition of the CG base pair. All analogues demonstrated strong binding affinity and very good selectivity for CG from pH 6.2 to 7.0; a marked improvement on previous modifications.
合成了双环核苷 N-甲基-3H-吡咯并[2,3-d]嘧啶-2(7H)-酮的 3-氨基苯基修饰类似物,并将其直接加入三聚体形成的寡核苷酸中,以利用其扩展的氢键结构识别 CG 碱基对。在 pH 值为 6.2 到 7.0 的范围内,所有类似物都表现出很强的结合亲和力和对 CG 的很好的选择性;与以前的修饰相比有了明显的改进。