Abstract
Analysis of the α-lipomycin biosynthesis gene cluster of Streptomyces aureofaciens Tü117 led to the identification of five putative regulatory genes, which are congregated into a subcluster. Analysis of the lipReg1–4 and lipX1 showed that they encode components of two-component signal transduction systems (LipReg1 and LipReg2), multiple antibiotics resistance-type regulator (LipReg3), large ATP-binding regulators of the LuxR family-type regulator (LipReg4), and small ribonuclease (LipRegX1), respectively. A combination of targeted gene disruptions, complementation experiments, lipomycin production studies, and gene expression analysis via RT-PCR suggests that all regulatory lip genes are involved in α-lipomycin production. On the basis of the obtained data, we propose that LipReg2 controls the activity of LipReg1, which in its turn govern the expression of the α-lipomycin pathway-specific regulatory gene lipReg4. The ribonuclease gene lipX1 and the transporter regulator lipReg3 appear to work independently of genes lipReg1, lipReg2, and lipReg4.
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This work was supported by the BMBF (genomic plus) grant to A.B and by the DAAD grant to L.H. (PKZ A/07/99406).
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Liliya Horbal and Yuriy Rebets equally contributed to this work.
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Horbal, L., Rebets, Y., Rabyk, M. et al. Characterization and analysis of the regulatory network involved in control of lipomycin biosynthesis in Streptomyces aureofaciens Tü117. Appl Microbiol Biotechnol 85, 1069–1079 (2010). https://doi.org/10.1007/s00253-009-2108-3
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DOI: https://doi.org/10.1007/s00253-009-2108-3