Cloning, Sequencing, and Heterologous Expression of the <i>e</i><i>lmGHIJ </i>Genes Involved in the Biosynthesis of the Polyketide Antibiotic Elloramycin from <i>Streptomyces </i><i>o</i><i>livaceus</i> Tü2353
作者:Elpidio R. Rafanan,、Linda Le、Lili Zhao、Heinrich Decker、Ben Shen
DOI:10.1021/np010007+
日期:2001.4.1
characterized by a unique highly hydroxylated cyclohexenone moiety. A cosmid clone 16F4, harboring genes for the production of 1 from Streptomyces olivaceus Tü2353, has been previously isolated. DNA sequence analysis of a 3.2-kb fragment from 16F4 revealed four open reading frames--the elmGHIJ genes. Heterologous expressions of the elmGHI genes in either Escherichia coli or Streptomyces lividans, followed by biochemical
Elloramycin A(1)属于萘并苯醌的小家族,其特征在于独特的高度羟基化的环己烯酮部分。先前已经分离了粘粒克隆16F4,其具有用于从橄榄链霉菌Tü2353生产1的基因。对来自16F4的3.2kb片段的DNA序列分析揭示了四个开放阅读框-elmGHIJ基因。ElmGHI基因在大肠杆菌或淡链霉菌中的异源表达,然后对ElmGHI蛋白进行生化表征,确定ElmG为四西松霉素B2加氧酶,ElmH为四西松霉素F1单加氧酶,ElmI为四西松霉素F1单加氧酶。这些结果为S中1的生物合成提供了直接的生化证据。