<scp>D</scp>- and<scp>L</scp>-Mannose-Containing<i>glyco</i>-Oligoamides Show Distinct Recognition Properties When Interacting with DNA
作者:M. Teresa Blázquez-Sánchez、Filipa Marcelo、María del Carmen Fernández-Alonso、Rafael del Villar-Guerra、Abdelouahid Samadi、F. Javier Cañada、Jesús Jiménez-Barbero、Cristina Vicent
DOI:10.1002/ejoc.201500740
日期:2015.10
hydrogen-bonding cooperative donor centres of carbohydrates in their recognition by DNA. The free- and bound-state geometries were studied, as were the affinities of the D and L enantiomers of the mannose glyco-oligoamides (1 and 2) for DNA polymers [ct-DNA and poly(dA-dT)2]. TR-NOESY and DF-STD experiments for the diastereomeric complexes formed with DNA allow the asymmetric centres of the sugar residue that are
甘露糖低聚糖 β-D-Man-Py-γ-Py-Ind (β-D-Man, 1) 和两种新的低聚糖 β-L-Man-Py-γ-Py-Ind (β-L -Man, 2) 和 6-deoxy-β-D-Man-Py-γ-Py-Ind (6-deoxy-β-D-Man, 3),已被设计和合成以研究氢键的作用DNA 识别碳水化合物的合作供体中心。研究了自由和结合态的几何形状,以及甘露糖寡酰胺(1 和 2)的 D 和 L 对映异构体对 DNA 聚合物 [ct-DNA 和聚 (dA-dT)2] 的亲和力。与 DNA 形成的非对映体复合物的 TR-NOESY 和 DF-STD 实验允许区分靠近 DNA 小沟内部和外部区域的糖残基的不对称中心。观察到 β-L-Man 衍生物 2 中的 CN 发夹折叠,糖的 α 面靠近吲哚环。C-2 和 C-3 中心朝向 DNA 小沟的内部区域。poly(dA-dT)2 的亲和