Acetylation of some novel hemicholinium compounds by soluble choline acetyltransferase: structure-activity relationships
作者:S. Martin Shreeve、G. B. A. Veitch、Brian A. Hemsworth
DOI:10.1021/jm00372a009
日期:1984.6
number of methylene groups inserted between the two phenyl rings. This study examines the significance of the internitrogen distance in these compounds with regard to their acetylation by soluble choline acetyltransferase (ChAc) in vitro. The hemicholinium compounds were incubated with [14C] acetylcoenzyme A and any acetylated products were isolated by liquid ion exchange. Only HC-3 and the analogue with
合成了4,2,2'-[1,1'-联苯] -4,4'-二基双[2-羟基-4,4-二甲基吗啉鎓]溴化物的双季氮类似物(hemicholinium 3,HC-3)。这些类似物与HC-3不同之处在于,它们在两个苯环之间插入了许多亚甲基。这项研究检查了这些化合物之间的氮间距距离的重要性,这些化合物在体外被可溶性胆碱乙酰基转移酶(ChAc)乙酰化。将半胱氨酸化合物与[14C]乙酰辅酶A一起孵育,并通过液相离子交换分离任何乙酰化产物。只有HC-3及其类似物在两个苯环之间具有三个亚甲基,即2,2'-(1,3-丙二基二-1,4-亚苯基)双[2-羟基-4、4-二甲基吗啉] (3CHC),被发现被显着乙酰化。这两种化合物的乙酰化率均为胆碱的28%。结论是,双季氮胆碱类似物中的14 A氮间距为体外ChAc乙酰化提供了最佳距离。