A useful propionate cofactor enhancing activity for organic solvent-tolerant recombinant metal-free bromoperoxidase (perhydrolase) from Streptomyces aureofaciens
作者:Hideyasu China、Hiroyasu Ogino
DOI:10.1016/j.bbrc.2019.06.036
日期:2019.8
The oxidative brominating activity of an organic solvent-tolerant recombinant metal-free bromoperoxidase BPO-A1 with C-terminal His-tag (rBPO-A1), from Streptomyces aureofaciens found to depend on various additives. These included carboxylic acids, used as cofactors and alcohols, used as water-miscible organic solvents. Enzyme activity was significantly enhanced by using propanoic acid (PA) as a cofactor
发现来自
金黄色链霉菌的具有C端His-tag(r
BPO-A1)的耐有机溶剂的
重组无
金属
溴过氧化物酶BPO-A1的氧化
溴化活性取决于各种添加剂。这些包括用作辅助因子的
羧酸和用作与
水混溶的有机溶剂的醇。通过使用
丙酸(PA)作为辅因子可以显着提高酶的活性,
丙酸在pH 5.0时具有较高的Log D,而
乙二醇在Log P中却较低。使用r
BPO-A1和PA时,氧化羟基
溴化对烯烃的位置特异性与使用
过乙酸的非酶促反应相比,
甲醇的存在更高。在酶促过氧化步骤之后发生的氧化
溴化步骤被认为是假酶促的。