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Activation of paulomycin production by exogenous γ-butyrolactone signaling molecules in Streptomyces albidoflavus J1074

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Abstract

The interspecies communication roles of γ-butyrolactones (GBLs) have been described for a long time but are still poorly understood. Herein, we analyzed more than 1000 Streptomyces strains and noticed a big quantitative gap between the strains with GBL biosynthetic genes and the strains with GBL receptor genes, which implies the wide-spread of GBLs as interspecies signals in Streptomyces and their great potential in the activation of silent natural product gene clusters. Streptomyces albidoflavus J1074, which has one GBL receptor gene but no GBL biosynthetic gene, was chosen as a target to study the possible interspecies communication roles of GBLs. At first, the GBL biosynthetic genes from Streptomyces coelicolor M145 were expressed in S. albidoflavus J1074, which enabled the S. albidoflavus strains to synthesize Streptomyces coelicolor butanolides (SCBs) and activated the production of paulomycins. Further studies showed that this activation process requires the participation of the GBL receptor gene XNR_4681. The results suggest that the expression of exogenous GBL biosynthetic genes can modulate the metabolisms of GBL non-producing strains, and this regulation role might be meaningful for silent gene cluster activation in Streptomyces. At final, we synthesized racemic-SCB2 and tried to simplify the activation process by adding SCB2 directly to S. albidoflavus J1074, which unfortunately failed to induce paulomycin production.

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Acknowledgments

We thank Prof. Huarong Tan and A/Prof. Jihui Zhang, Institute of Microbiology, Chinese Academy of Sciences, for generously provided us with SCB standards and bacterial strains.

Funding

This study was funded in part by the Ministry of Science and Technology of China (2018YFA0901901 and 2015CB150600) and the National Natural Science Foundation of China (31670032).

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Correspondence to Yihua Chen.

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Zhang, Y., Wang, M., Tian, J. et al. Activation of paulomycin production by exogenous γ-butyrolactone signaling molecules in Streptomyces albidoflavus J1074. Appl Microbiol Biotechnol 104, 1695–1705 (2020). https://doi.org/10.1007/s00253-019-10329-9

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  • DOI: https://doi.org/10.1007/s00253-019-10329-9

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