Molecular recognition in the P2Y14 receptor: Probing the structurally permissive terminal sugar moiety of uridine-5′-diphosphoglucose
作者:Hyojin Ko、Arijit Das、Rhonda L. Carter、Ingrid P. Fricks、Yixing Zhou、Andrei A. Ivanov、Artem Melman、Bhalchandra V. Joshi、Pavol Kováč、Jan Hajduch、Kenneth L. Kirk、T. Kendall Harden、Kenneth A. Jacobson
DOI:10.1016/j.bmc.2009.05.024
日期:2009.7
substitution by chain extension through an amide linkage. Functionalized congeners containing terminal 2-acylaminoethylamides prepared by this strategy retained P2Y14 activity, and molecular modeling predicted close proximity of this chain to the second extracellular loop of the receptor. In addition, replacement of glucose with other sugars did not diminish P2Y14 potency. For example, the [5′′]ribose derivative
P2Y 14受体是一种核苷酸信号蛋白,由尿苷-5'-二磷酸葡萄糖1和其他尿嘧啶核苷酸激活。我们已经确定1的葡萄糖部分是设计该 P2Y 14激动剂类似物的最结构允许区域。例如,尿苷-5'-二磷酸葡萄糖醛酸的羧酸酯基团被证明适用于通过酰胺键进行链延伸的灵活取代。通过该策略制备的含有末端 2-酰基氨基乙基酰胺的功能化同源物保留了 P2Y 14活性,分子模型预测该链与受体的第二个细胞外环非常接近。此外,用其他糖替代葡萄糖不会降低 P2Y 14效力。例如,[5'']核糖衍生物的EC 50为0.24 μM。的葡萄糖部分的选择性monofluorination指示用于2'角色' -和6'' -的羟基1受体识别。β-葡萄糖苷的效力比天然 α-异构体低两倍,但 1''-氧的亚甲基替代消除了活性。用环戊基或刚性双环 [3.1.0] 己烷基团取代核糖环系统消除了活性。Uridine-5'-diphosphoglucose