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首页> 外文期刊>The Journal of Antibiotics: An International Journal >Production of a New Hybrid Anthracycline 4-O-Methylepelmycin by Heterologous Expression of dnrK in Epelmycin-producing Streptomyces violaceus
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Production of a New Hybrid Anthracycline 4-O-Methylepelmycin by Heterologous Expression of dnrK in Epelmycin-producing Streptomyces violaceus

机译:dnrK在产生埃博霉素的链霉菌链霉菌中的异源表达生产新的杂交蒽环霉素4-O-甲基埃博霉素

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摘要

A new hybrid anthracycline antibiotic was produced by heterologous expression of dnrK encoding carminomycin 4-O-metyltransferase in an epelmycin-producing Streptomyces violaceus. pMK 100 was constructed by insertion of Steptomyces peucetius dnrK gene in Steptomyces-expresion vector pIJ6021 and introduced to the epelmycin producer. The transformant produced a hybrid anthracycline antibiotic together with host epelmycins when cultured in antibiotic production medium in the presence of thiostrepton. The hybrid anthracycline was determined to be 7-O-L-rhodosaminyl-4-O-methyl-#epsilon#-rhodomycinone (4-O-methylepelmycin D). However, the attempts on production of hybrid 4-O-methylaclarubicin and 4-O-methyl-1-deoxyobelmycin by the transformants of aclarubicin and 1-deoxyobelmycin producers with pMK 100 were unsuccessful.
机译:一种新的杂交蒽环类抗生素是通过在产生埃佩霉素的紫链霉菌中异源表达编码卡米霉素4-O-甲基转移酶的dnrK产生的。 pMK 100是通过将Steptomyces peucetius dnrK基因插入到Steptomyces表达载体pIJ6021中而构建的,并被引入到埃霉素生产商中。当在硫代链霉菌素存在下在抗生素生产培养基中培养时,该转化体与宿主埃奇霉素一起产生杂交蒽环类抗生素。杂交蒽环类药物被确定为7-O-L-杜鹃花基-4-O-甲基-ε-rhodomycinone(4-O-甲基伊贝霉素D)。然而,用具有pMK 100的阿克拉比霉素和1-脱氧贝尔霉素生产者的转化体生产杂交4-O-甲基阿克拉比霉素和4-O-甲基-1-脱氧贝尔霉素的尝试均未成功。

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