Molecular recognition via base-pairing and phosphate chelation. Ditopic and tritopic sapphyrin-based receptors for the recognition and transport of nucleotide monophosphates
作者:Vladimír Král、Jonathan L. Sessler
DOI:10.1016/0040-4020(94)00914-g
日期:1995.1
Cytosine- (8, 9) and guanosine- (10, 11) substituted sapphyrin derivatives were prepared and tested as possible carriers for nucleotide monophosphate transport using a bulk liquid membrane model system at neutral pH. For each type of substituted sapphyrin, transport selectivity for the complementary nucleotide monophosphate was found. A high intrinsic preference for the 2′-, as opposed to 3′- or 5′-
制备胞嘧啶-(8,9)和鸟苷-(10,11)取代的木素衍生物,并使用中性pH的大容量液体膜模型系统测试核苷酸单磷酸转运的可能载体。对于每种类型的取代的番红素,发现对互补核苷酸单磷酸的转运选择性。在带有胞嘧啶的载体8b影响鸟苷单磷酸转运的特定情况下,也观察到了与3'-或5'-异构体相反的2'-异构体的高固有偏好。来自直接亲和力常数测定的值用于合理化这些结果。