Simultaneous Interaction with Base and Phosphate Moieties Modulates the Phosphodiester Cleavage of Dinucleoside 3‘,5‘-Monophosphates by Dinuclear Zn<sup>2+</sup> Complexes of Di(azacrown) Ligands
作者:Qi Wang、Harri Lönnberg
DOI:10.1021/ja058806s
日期:2006.8.1
ability of the Zn(2+) complexes of these ligands to promote the transesterification of dinucleoside 3',5'-monophosphates to a 2',3'-cyclic phosphate derived from the 3'-linked nucleoside by release of the 5'-linked nucleoside has been studied over a narrow pH range, from pH 5.8 to 7.2, at 90 degrees C. The dinuclear complexes show marked base moiety selectivity. Among the four dinucleotide 3',5'-phosphates
已经合成了五个双核配体 (1-5) 和一个三核配体 (6),其中包含连接到芳族支架上的 1,5,9-triazacyclododecan-3-yloxy 基团。这些配体的 Zn(2+) 复合物促进双核苷 3',5'-单磷酸酯转酯化为 2',3'-环状磷酸酯的能力,该磷酸酯衍生自 3'-连接的核苷,释放 5'已在 90 摄氏度的狭窄 pH 范围(从 pH 5.8 到 7.2)研究了-连接的核苷。双核复合物显示出显着的碱基部分选择性。在研究的四种二核苷酸 3',5'-磷酸中,即。adenylyl-3',5'-adenosine (ApA), adenylyl-3',5'-uridine (ApU), uridylyl-3',5'-adenosine (UpA), and uridylyl-3',5'-uridine (上U), 含有一个尿嘧啶碱基 (ApU 和 UpA) 的二聚体比含有两个尿嘧啶碱基