Abstract
As bacterial natural products have been proved to be the most important source of many therapeutic medicines, the need to discover novel natural products becomes extremely urgent. Despite the fact that the majority of bacterial species are yet to be cultured in a laboratory setting, and that most of the bacterial natural product biosynthetic genes are silent, “metagenomics technology” offers a solution to help clone natural product biosynthetic genes from environmental samples, and genetic engineering enables the silent biosynthetic genes to be activated. In this work, a type II polyketide biosynthetic gene cluster was identified from a soil metagenomic library and was activated by over-expression of a SARP regulator gene in the gene cluster in Streptomyces hosts. A new tetracenomycin type compound tetracenomycin Y was identified from the fermentation broth. This study shows that metagenomics and genetic engineering could be combined to provide access to new natural metabolites.
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This study was supported by the National Natural Science Foundation of China under Grant Number 31770049.
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ZF designed the experiments; LN, YG and QJ carried out the experiments; MC performed NMR measurements; SW, YL, and ZF analyzed the experimental results; ZF and LN wrote the manuscript. All authors have read and agreed to the published version of the manuscript.
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Nie, L., Cao, M., Ji, Q. et al. Regulated Expression of an Environmental DNA-Derived Type II Polyketide Gene Cluster in Streptomyces Hosts Identified a New Tetracenomycin Derivative TCM Y. Curr Microbiol 79, 336 (2022). https://doi.org/10.1007/s00284-022-03039-5
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DOI: https://doi.org/10.1007/s00284-022-03039-5