产柔红霉素链霉菌中控制柔红霉素生物合成早期和晚期步骤的基因簇的功能表征及转录分析。
Functional characterization and transcriptional analysis of a gene cluster governing early and late steps in daunorubicin biosynthesis in Streptomyces peucetius.
作者信息
Madduri K, Hutchinson C R
机构信息
School of Pharmacy, University of Wisconsin, Madison 53706, USA.
出版信息
J Bacteriol. 1995 Jul;177(13):3879-84. doi: 10.1128/jb.177.13.3879-3884.1995.
Abstract
Sequence analysis of the Streptomyces peucetius daunorubicin biosynthetic gene cluster revealed a partial (dnrQ) and two complete (dnrD and dnrP) open reading frames flanking dnrK. Bioconversion experiments showed that DnrD converts aklanonic acid methylester to aklaviketone and that DnrC is a methyltransferase that converts aklanonic acid to aklanonic acid methylester. The deduced dnrP gene product, homologous to known esterases, may catalyze the conversion of 10-carbomethoxy-13-deoxycarminomycin to its 10-carboxy derivative. The dnrKPQS genes may be transcribed as a polycistronic mRNA.
摘要
对天蓝色链霉菌柔红霉素生物合成基因簇的序列分析显示，在dnrK两侧有一个部分开放阅读框（dnrQ）和两个完整的开放阅读框（dnrD和dnrP）。生物转化实验表明，DnrD将阿克拉诺酸甲酯转化为阿克拉酮，并且DnrC是一种将阿克拉诺酸转化为阿克拉诺酸甲酯的甲基转移酶。推导的dnrP基因产物与已知酯酶同源，可能催化10-甲氧羰基-13-脱氧卡红菌素向其10-羧基衍生物的转化。dnrKPQS基因可能作为多顺反子mRNA进行转录。
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