cycle to release 5-oxoproline and amino acid. Eighteen N-acyl-L-alanine analogues including eleven new compounds have been synthesized and examined for their inhibitory activity against recombinant human GGCT protein. Simple N-glutaryl-L-alanine was found to be the most potent inhibitor for GGCT. Other N-glutaryl-L-alanine analogues having methyl and dimethyl substituents at the 2-position were moderately
γ-谷
氨酰环转移酶(GGCT)是一种重要的酶,可在γ-谷
氨酰循环中裂解γ-谷
氨酰
氨基酸,从而释放出5-氧代脯
氨酸和
氨基酸。已合成了包括11种新化合物在内的18种N-酰基-
L-丙氨酸类似物,并研究了其对
重组人GGCT蛋白的抑制活性。发现简单的N-谷
氨酰-
L-丙氨酸是GGCT最有效的
抑制剂。其他在2位具有甲基和二甲基取代基的N-
戊二烯基-
L-丙氨酸类似物是中等有效的,而N-(3R-
氨基
戊二烯基)-
L-丙氨酸是在3-位具有(R)-
氨基的底物。相反,在3-氮杂
戊二烯基碳上具有N-甲基取代基的底物或N-(N-甲基-3-氮杂
戊二烯基)-
L-丙氨酸反过来表现出优异的抑制性能。