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- W2980900256 abstract "Summary BldD generally functions as a repressor controlling morphological development of Streptomyces . In this work, evidences that BldD also activates antibiotic production are provided. In Streptomyces roseosporus (which produces daptomycin widely used for treatment of human infections), deletion of bldD notably reduced daptomycin production, but enhanced sporulation. BldD stimulated daptomycin production by directly activating transcription of dpt structural genes and dptR3 (which encodes an indirect activator of daptomycin production), and repressed its own gene. BldD‐binding sites on promoter regions of dptE , dptR3 , and bldD were all found to contain BldD box‐like sequences, facilitating prediction of new BldD targets. Two Streptomyces global regulatory genes, adpA and afsR , were confirmed to be directly activated by BldD. The protein AfsR was shown to act as an activator of daptomycin production, but a repressor of development. BldD directly represses nine key developmental genes. In Streptomyces avermitilis (which produces effective anthelmintic agents avermectins), BldD homolog (BldDsav) directly activates avermectin production through ave structural genes and cluster‐situated activator gene aveR . This is the first report that BldD activates antibiotic biosynthesis both directly and via a cascade mechanism. BldD homologs are widely distributed among Streptomyces , our findings suggest that BldD may activate antibiotic production in other Streptomyces species." @default.
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- W2980900256 date "2019-11-07" @default.
- W2980900256 modified "2023-10-16" @default.
- W2980900256 title "BldD, a master developmental repressor, activates antibiotic production in two <i>Streptomyces</i> species" @default.
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- W2980900256 doi "https://doi.org/10.1111/mmi.14405" @default.
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