A Fluorescence-Based Assay for Baeyer-Villiger Monooxygenases, Hydroxylases and Lactonases
作者:Renaud Sicard、Lu S. Chen、Anita J. Marsaioli、Jean-Louis Reymond
DOI:10.1002/adsc.200505040
日期:2005.6
2-coumaryloxy ketones using meta-chloroperbenzoic acid proceeded regioselectively to the corresponding acyloxyalkyl derivatives of umbelliferone and nitrophenol. These chiral lactones underwent a fluorogenic and chromogenic reaction upon hydrolysis by esterases, in particular pig liver esterase. Enantioselectivity of the ester hydrolysis reaction was determined by chiral-phase analysis of the unreacted lactones
伞形酮和硝基苯酚与氯丙酮,3-氯丁酮,2-氯环戊酮和2-氯环己酮烷基化,得到相应的2-香豆芳氧基和2-硝基苯氧基酮。2-香豆基甲氧基酮用作荧光底物,使用微量滴定板检测高通量微生物培养物中的拜尔-维利格单加氧酶活性。产生Baeyer-Villiger单加氧酶(BVMO)的微生物将2-香豆基甲氧基酮氧化,释放伞形酮作为荧光信号。底物也通过微生物单加氧酶(Trichosporon cutaneum)进行了生物转化。使用间氯过苯甲酸的化学拜耳-维利格化学氧化2-香豆素氧基酮在区域上选择性地转化为伞形酮和硝基苯酚的相应酰氧基烷基衍生物。这些手性内酯在被酯酶,特别是猪肝酯酶水解时发生发荧光和发色反应。酯水解反应的对映选择性通过未反应的内酯的手性相分析来确定。