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• W3008866856 abstract "Abstract Background Lincomycin, produced by Streptomyces lincolnensis , is a lincosamide antibiotic and widely used for the treatment of the infective diseases caused by Gram-positive bacteria. The mechanisms of lincomycin biosynthesis have been deeply explored in recent years. However, the regulatory effects of LmbU that is a transcriptional regulator in lincomycin biosynthetic ( lmb ) gene cluster have not been fully addressed. Results LmbU was used to search for homologous LmbU (LmbU-like) proteins in the genomes of actinobacteria, and the results showed that LmbU-like proteins are highly distributed regulators in the biosynthetic gene clusters (BGCs) of secondary metabolites or/and out of the BGCs in actinomycetes. The overexpression, inactivation and complementation of the lmbU gene indicated that LmbU positively controls lincomycin biosynthesis in S. lincolnensis . Comparative transcriptomic analysis further revealed that LmbU activates the 28 lmb genes at whole lmb cluster manner. Furthermore, LmbU represses the transcription of the non- lmb gene hpdA in the biosynthesis of l -tyrosine, the precursor of lincomycin. LmbU up-regulates nineteen non- lmb genes, which would be involved in multi-drug flux to self-resistance, nitrate and sugar transmembrane transport and utilization, and redox metabolisms. Conclusions LmbU is a significant pleiotropic transcriptional regulator in lincomycin biosynthesis by entirely activating the lmb cluster and regulating the non- lmb genes in Streptomyces lincolnensis . Our results first revealed the pleiotropic regulatory function of LmbU, and shed new light on the transcriptional effects of LmbU-like family proteins on antibiotic biosynthesis in actinomycetes." @default.
• W3008866856 created "2020-03-06" @default.
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• W3008866856 date "2020-02-12" @default.
• W3008866856 modified "2023-10-13" @default.
• W3008866856 title "Comparative transcriptomic analysis reveals the significant pleiotropic regulatory effects of LmbU on lincomycin biosynthesis" @default.
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• W3008866856 doi "https://doi.org/10.1186/s12934-020-01298-0" @default.
• W3008866856 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7014725" @default.
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