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Genome mining Streptomyces sp. KCTC 0041BP as a producer of dihydrochalcomycin

  • Applied Genetics and Molecular Biotechnology
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Abstract

Streptomyces sp. KCTC 0041BP, which was isolated from a soil sample in Cheolwon, Republic of Korea, is a dihydrochalcomycin producer. In this study, we obtained the genome of S. sp. KCTC 0041BP with 7.54 Mb genome size. antiSMASH and the dbCAN2 meta server predicted that the genome would contain 26 secondary metabolite biosynthetic gene clusters (BGCs) and 285 carbohydrate-active enzymes. Besides dihydrochalcomycin, 21 compounds were successfully identified from S. sp. KCTC 0041BP, and among them, the structure of 8 compounds were proven by high-resolution electrospray ionization mass spectrometry (HRESIMS) and nuclear magnetic resonance (NMR). The identification of chalcomycin analogs led to a better understanding of the biosynthetic pathway of dihydrochalcomycin/chalcomycin. From the analysis of cluster 2 and solvent selection, linearmycins were determined. Linearmycins showed antibacterial activity with both Gram-positive and Gram-negative bacteria and antifungal activity. One strain many compounds (OSMAC) strategy was applied to activate the salicylic acid production in this strain. A salicylic acid biosynthetic pathway was also predicted, but not by antiSMASH. These results showed that this strain can produce many useful compounds and potentially produce novel compounds with most secondary BGCs yet to be experimentally identified.

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Funding

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MEST) (NRF-2021R1A2C2004775).

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Correspondence to Jae Kyung Sohng.

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This article does not contain any studies with human participants or animals performed by any of the authors

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The authors declare no competing interests.

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Nguyen, C.T., Bridget, A.F., Pham, V.T.T. et al. Genome mining Streptomyces sp. KCTC 0041BP as a producer of dihydrochalcomycin. Appl Microbiol Biotechnol 105, 5023–5037 (2021). https://doi.org/10.1007/s00253-021-11393-w

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  • DOI: https://doi.org/10.1007/s00253-021-11393-w

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