作者:Yu Rao、Andre Venot、Eric E. Swayze、Richard H. Griffey、Geert-Jan Boons
DOI:10.1039/b517725a
日期:——
A highly convergent approach for the chemical synthesis of eight structurally related trisaccharides that contain 3 to 5 amino groups has been described. Fourier-transformation ion cyclotron resonance mass spectrometry (FT-ICR MS) has been employed to determine the dissociation constants (Kd) for the binding of the trisaccharides to a prototypical fragment of 16S ribosomal RNA. A compound that contained a 4,6-dideoxy-4-amino-β-D-glucopyranoside moiety at C-3 displayed binding in the low micromolar range. It was found that small structural changes of the saccharides resulted in large differences in affinity. The described structure–activity relationship is expected to be valuable for the development of novel antibiotics that target rRNA.
本研究介绍了一种高度融合的方法,用于化学合成含有 3 至 5 个氨基的 8 种结构相关的三糖。傅立叶变换离子回旋共振质谱(FT-ICR MS)被用来测定三糖与 16S 核糖体 RNA 原型片段结合的解离常数(Kd)。一种在 C-3 位含有 4,6-二脱氧-4-氨基-β-D-吡喃葡萄糖苷分子的化合物显示出低微摩尔范围的结合力。研究发现,糖类结构的微小变化会导致亲和力的巨大差异。所描述的结构-活性关系对开发以 rRNA 为靶标的新型抗生素很有价值。