Page 90 - 精细化工2019年第12期
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第 36 卷第 12 期                            精   细   化   工                                 Vol.36, No.12
             2019 年 12 月                             FINE CHEMICALS                                 Dec.    2019


              生物工程
                               玫瑰产色链霉菌 P450 酶体外催化


                                        合成 16α-羟基泼尼松龙



                                                                            *
                                             吴   倩,刘亚洲,曾志刚
                   (抗生素研究与再评价四川省重点实验室,四川抗菌素工业研究所,成都大学,四川  成都    610106)

                 摘要:以泼尼松龙为原料,利用玫瑰产色链霉菌(Streptomyces roseochromogenes)SIIA-1902 的胞内细胞色素
                 P450s,通过电子转移配偶体(玫瑰氧还蛋白和玫瑰红素氧还蛋白)将泼尼松龙转化为 16α-羟基泼尼松龙。结果
                 表明,P450s 可以利用过氧化物以“过氧化物分流”途径完成该转化过程,从而取代天然氧还原途径。经硫酸
                 铵沉淀法浓缩后的 P450s 酶液在 1.0  mmol/L  NaIO 4 的支持下发生过氧化物分流反应,16α-羟基泼尼松龙的产量
                 为 23.3 mg/L,泼尼松龙转化率为 12.9%;在 1.0 mmol/L H 2 O 2 的支持下,产量升高到 45.3 mg/L,泼尼松龙转化
                 率提高到 25.1%。对过氧化物分流反应条件进行了进一步优化。当泼尼松龙浓度为 0.5  mmol/L,羟丙基环糊精
                 的质量浓度为 0.2 g/L,n(泼尼松龙)∶n(过氧化氢)=1∶3 时,在 pH 7.2、30  ℃下反应 24 h,16α-羟基泼尼松龙的
                 产量为 64.3 mg/L,泼尼松龙转化率为 35.7%。
                 关键词:P450s;泼尼松龙;过氧化物分流反应;生物工程
                 中图分类号:TQ426.97      文献标识码:A      文章编号:1003-5214 (2019) 12-2418-07



                       Synthesis of 16α-Hydroxy Prednisolone in vitro by Cytochrome
                               P450s Enzyme in Streptomyces roseochromogenes


                                                                               *
                                          WU Qian, LIU Ya-zhou, ZENG Zhi-gang
                 (Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of
                 Antibiotics, Chengdu University, Chengdu 610106, Sichuan, China)


                 Abstract: Cytochrome P450s enzyme in Streptomyces roseochromogenes SIIA-1902 was used to convert
                 prednisolone into 16 α-hydroxy prednisolone by electron transfer of spouse (roseoredoxin and roseoredoxin
                 reductase). The results showed that peroxides could replace the natural oxygen reduction pathway in a cycle
                 known as the ‘peroxide shunt’. In a NaIO 4 supported peroxide shunt reaction, the yield of 16α-hydroxy
                 prednisolone  was  23.3  mg/L,  and  the  conversion  rate  of  prednisolone  was  12.9%.  Under  the  same
                 conditions,  in  a  hydrogen  peroxide  supported  peroxide  shunt  reaction,  the  yield  of  16α-hydroxy
                 prednisolone increased to 45.3 mg/L, and the conversion rate reached 25.1%. The peroxide shunt reaction
                 conditions  were  further  optimized.  When  the  concentration  of  prednisolone  was  0.5  mmol/L,  the  mass
                 fraction  of  hydroxypropyl  cyclodextrin  was  0.2  g/L,  and  the  molar  ratio  of  prednisolone  to  hydrogen
                 peroxide was 1∶3, the yield of 16α-hydroxy prednisolone was up to 64.3 mg/L and the conversion rate of
                 prednisolone was 35.7% after 24 h of reaction at pH 7.2 and 30  ℃.
                 Key words: P450s; prednisolone; peroxide shunt reaction; biological engineering


                 细胞色素 P450s 单加氧酶(P450s 酶)是一种                   催化的单加氧反应中非常重要的生物催化反应。例
            含有亚铁红素的酶,能够催化多种类型的化学反应。                            如,工业上应用最为广泛的甾体羟基化反应。链霉
            对碳氢化合物中非活泼 C—H 键的羟基化是该类酶                           菌属(Streptomyces)是 P450s 的丰富来源,许多链


                 收稿日期:2019-05-15;  定用日期:2019-06-26; DOI: 10.13550/j.jxhg.20190438
                 基金项目:四川省科技计划应用基础研究项目(2017JY0256)
                 作者简介:吴   倩(1994—),女,硕士生。联系人:曾志刚(1974—),副研究员,E-mail:1437268062@qq.com。
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