Thiahomoisocitrate: A highly potent inhibitor of homoisocitrate dehydrogenase involved in the α-aminoadipate pathway
作者:Takashi Yamamoto、Tadashi Eguchi
DOI:10.1016/j.bmc.2007.12.002
日期:2008.3.15
Homoisocitrate dehydrogenase is involved in the alpha-aminoadipate pathway Of L-lysine biosynthesis in higher fungi such as yeast and human pathogenic fungi. This enzyme catalyzes the oxidative decarboxylation of (2R,3S)-homoisocitrate into 2-ketoadipate using NAD(+) as a coenzyme. A series of aza-, oxa-, and thia-analogues of homoisocitrate was designed and synthesized as an inhibitor for homoisocitrate dehydrogenase. Among them, thia-analogue showed strong competitive inhibitory activity as K-i = 97 nM toward homoisocitrate dehydrogenase derived from Saccharomyces cerevisiae. Kinetic studies suggested that the formation of the enolate intermediate played an important role in inhibition. (C) 2007 Elsevier Ltd. All rights reserved.