Discovery of inhibitors and substrates of brassinin hydrolase: Probing selectivity with dithiocarbamate bioisosteres
作者:M. Soledade C. Pedras、Zoran Minic、Sajjad Hossain
DOI:10.1016/j.bmc.2011.11.009
日期:2012.1
inspired compounds, bioisosteres of brassinin and a range of related compounds, were evaluated as potential substrates and inhibitors of BHAb for the first time. While six compounds containing thiocarbamate, carbamate and carbonate groups displayed inhibitory activity against BHAb, only two were found to be substrates (thionecarbamate and dithiocarbamate). Methyl naphthalen-1-yl-methyl carbamate, the most
Brassinin水解酶(BHAb)是植物病原体Alternaria braciicicola在压力条件下产生的一种可诱导酶,它催化植物抗毒素Brasinin的二硫代氨基甲酸甲酯水解为吲哚基-3-甲胺,甲烷硫醇和羰基硫。首次评估了34种受底物启发的化合物,油菜素的生物异构体和一系列相关化合物,作为BHAb的潜在底物和抑制剂。尽管六种含有硫代氨基甲酸酯,氨基甲酸酯和碳酸酯基团的化合物显示出对BHAb的抑制活性,但仅发现两种底物(硫代氨基甲酸酯和二硫代氨基甲酸酯)。萘甲酸-1-基氨基甲酸甲酯(六种中最有效的抑制剂)和甲基N'-(1-甲基-3-吲哚基甲基)氨基甲酸酯通过可逆的非竞争性机制抑制BHAb(K i分别 为89±9和695± 60μM )。重要的是,这些氨基甲酸酯抑制剂对芸苔假单胞菌的降解具有抗性。碳酸盐也能抑制BHAb,但是,由油菜曲霉快速降解会使其作为农作物保护剂的可能性降低。总体而