Structural Evaluation of Tandem Hairpin Pyrrole–Imidazole Polyamides Recognizing Human Telomeres
作者:Akiyoshi Hirata、Kiyoshi Nokihara、Yusuke Kawamoto、Toshikazu Bando、Asuka Sasaki、Satoru Ide、Kazuhiro Maeshima、Takeshi Kasama、Hiroshi Sugiyama
DOI:10.1021/ja506058e
日期:2014.8.13
A polyamide containing N-methylpyrrole (Py) and N-methylimidazole (Im), designated PIPA, binds with high affinity and specificity to specific nucleotide sequences in the minor groove of double-helical DNA. Based on a recent report of the synthesis of PIPA for telomere visualization, the present paper focused on the size of the connecting part (hinge region) of two PIPA segments of the tandem hairpin
含有 N-甲基吡咯 (Py) 和 N-甲基咪唑 (Im) 的聚酰胺,称为 PIPA,以高亲和力和特异性结合双螺旋 DNA 小沟中的特定核苷酸序列。基于最近关于端粒可视化的 PIPA 合成报告,本文重点研究串联发夹 PIPA 的两个 PIPA 段的连接部分(铰链区)的大小,Dab(Im-Im-Py)-Py- Py-Py-Im-[铰链]-Dab(Im-Im-Py)-Py-Py-Py-Im-βAla-NH(CH2)3N(CH3)-(CH2)3NH-[染料]。本论文还描述了通过测量热熔化温度和表面等离子体共振以及通过对人类细胞中的端粒 (TTAGGG)n 进行特异性染色来表征结合。还通过高分辨率质谱法研究了微异质性。