A Bradyrhizobium monooxygenase, a gene for encoding the monooxygenase, a recombinant expression vector comprising the gene and a recombinant transformant, a method of preparing the monooxygenase by the recombinant expression transformant, and a method of preparing an optically pure chiral sulfoxide by the monooxygenase, in particular to a method of preparing prazole drugs by means of catalyzing the asymmetric oxidation of thioether, a prazole precursor. As compared with other methods of preparing an optically pure sulfoxide, the product produced by the monooxygenase of the present invention as a catalyst has high optical purity, avoids the generation of the byproduct sulfone, and has advantages of mild reaction conditions, simple and convenient operations, easy amplification, etc.
一种布拉氏霉单氧化酶,一种用于编码该单氧化酶的
基因,一种包含该
基因的
重组表达载体和一种
重组转化子,一种通过
重组表达转化子制备该单氧化酶的方法,以及一种通过该单氧化酶制备光学纯手性亚砜的方法,特别是针对一种通过催化普唑前体
硫醚的不对称氧化制备普唑药物的方法。与其他制备光学纯亚砜的方法相比,本发明的单加氧酶作为催化剂产生的产物光学纯度高,避免了副产物砜的生成,具有反应条件温和、操作简单方便、易于放大等优点。