is unclear. Six phenazine antibiotics were isolated from Lysobacter antibioticus OH13. A 10 gene cluster was identified for phenazine biosynthesis. Mutation of LaPhzNO1 abolished all N-oxides, while non-oxides markedly increased. LaPhzNO1 is homologous to Baeyer–Villiger flavoproteins but was shown to catazlye phenazine N-oxidation. LaPhzNO1 and LaPhzS together converted phenazine 1,6-dicarboxylic
杂环芳族N-氧化物通常具有有效的
生物活性,但芳族N-氧化的机理尚不清楚。从抗生素溶杆菌OH13中分离出六种
吩嗪抗生素。确定了10个
基因簇用于
吩嗪的
生物合成。LaPhzNO1的突变消除了所有N-氧化物,而非氧化物明显增加。LaPhzNO1与Baeyer-Villiger黄素蛋白同源,但显示出Catazlye
吩嗪N-氧化作用。LaPhzNO1和LaPhzS一起将
吩嗪1,6-二
羧酸转化为
1,6-二羟基吩嗪N 5,N 10-二氧化物。LaPhzNO1也催化N-氧化
8-羟基喹啉。