诺卡迪亚
生物
诺卡菌病
链霉菌
基因座(遗传学)
微生物学
巴西诺卡氏菌
基因
次生代谢物
诺卡氏菌感染
放线菌
诺卡氏菌科
人类病原体
遗传学
细菌
作者
Marion Hérisse,Keishi Ishida,Jessica L. Porter,Benjamin P Howden,Christian Hertweck,Timothy P. Stinear,Sacha J. Pidot
标识
DOI:10.1021/acschembio.9b00763
摘要
The genus Nocardia contains >50 human pathogenic species that cause a range of illnesses from skin and soft tissue infections to lung and brain infections. However, despite their membership in the most prominent family of secondary metabolite producers (the Actinomycetes), the ability of Nocardia species, especially those that cause human infections, to produce secondary metabolites has not been as well studied. Using genome mining, we have investigated cryptic secondary metabolite biosynthesis gene clusters from Nocardia species and identified a conserved locus within human pathogenic strains of Nocardia brasiliensis and Nocardia vulneris. Direct capture and heterologous expression in a Streptomyces host activated the biosynthetic locus, revealing it to be the source of the brasiliquinones, benz[a]anthraquinone antibiotics whose biosynthetic pathway has remained hidden for over two decades, until now. Our findings highlight these hitherto neglected human pathogenic Nocardia as a source of diverse and important natural products.
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