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Induction of Fungal Secondary Metabolites by Co-Culture with Actinomycete Producing HDAC Inhibitor Trichostatins

  • Gwi Ja Hwang (Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Jongtae Roh (Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Sangkeun Son (Antimicrobial Discovery Center, Department of Biology, Northeastern University) ;
  • Byeongsan Lee (Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Jun-Pil Jang (Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Jae-Seoun Hur (Korean Lichen Research Institute, Sunchon National University) ;
  • Young-Soo Hong (Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Jong Seog Ahn (Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Sung-Kyun Ko (Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Jae-Hyuk Jang (Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB))
  • Received : 2023.01.12
  • Accepted : 2023.07.10
  • Published : 2023.11.28

Abstract

A recently bioinformatic analysis of genomic sequences of fungi indicated that fungi are able to produce more secondary metabolites than expected. Despite their potency, many biosynthetic pathways are silent in the absence of specific culture conditions or chemical cues. To access cryptic metabolism, 108 fungal strains isolated from various sites were cultured with or without Streptomyces sp. 13F051 which mainly produces trichostatin analogues, followed by comparison of metabolic profiles using LC-MS. Among the 108 fungal strains, 14 produced secondary metabolites that were not recognized or were scarcely produced in mono-cultivation. Of these two fungal strains, Myrmecridium schulzeri 15F098 and Scleroconidioma sphagnicola 15S058 produced four new compounds (1-4) along with a known compound (5), demonstrating that all four compounds were produced by physical interaction with Streptomyces sp. 13F051. Bioactivity evaluation indicated that compounds 3-5 impede migration of MDA-MB-231 breast cancer cells.

Keywords

Acknowledgement

This work was supported by the Korea Research Institute of Bioscience and Biotechnology (KRIBB) Research Initiative Program (KGM52922322 and KGM1222312) funded by the Ministry of Science ICT (MSIT) and the Basic Science Research Program (2021R1I1A2049704) of the Ministry of Education of the Republic of Korea. We thank the Korea Basic Science Institute, Ochang, Korea, for providing the NMR (700MHz) and HRESIMS data.

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