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Jeong SY, Alishir A, Zhang S, Zhang Y, Choi S, Pang C, Bae HY, Jung WH, Kim KH. Identification of Obscurolide-Type Metabolites and Antifungal Metabolites from the Termite-Associated Streptomyces neopeptinius BYF101. JOURNAL OF NATURAL PRODUCTS 2023; 86:1891-1900. [PMID: 37506055 DOI: 10.1021/acs.jnatprod.3c00193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
Streptomyces spp. are well-known symbiotic microorganisms that produce antimicrobial metabolites against various pathogens. We isolated actinomycetes from the body surface of the termite Odontotermes formosanus and identified it as Streptomyces neopeptinius BYF101 based on 16S rRNA phylogenetic analysis. Chemical analysis of the cultures of termite-associated S. neopeptinius BYF101 via HR-MS2 and GNPS analyses enabled the isolation and identification of 20 metabolites, including the unreported obscurolide-type metabolites (1-3). The chemical structures of unreported compounds (1-3) were elucidated using HR-ESI-MS and 1D and 2D NMR analysis, and their absolute configurations were determined via chemical reactions followed by the application of competing enantioselective acylation (CEA) and computational methods for ECD and DP4+ probability calculation. The isolated compounds (1-20) were tested to determine their antifungal activity against two human fungal pathogens, Candida albicans and Cryptococcus neoformans. Among the compounds tested, indole-3-carboxylic acid (9) displayed antifungal activity against C. neoformans, with an MIC value of 12 μg/mL.
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Affiliation(s)
- Se Yun Jeong
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Akida Alishir
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Shuxiang Zhang
- College of Life Sciences, Anhui Agricultural University, Hefei 230036, People's Republic of China
| | - Yinglao Zhang
- College of Life Sciences, Anhui Agricultural University, Hefei 230036, People's Republic of China
| | - Sohyeong Choi
- Department of Systems Biotechnology, Chung-Ang University, Anseong 17546, Republic of Korea
| | - Changhyun Pang
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Han Yong Bae
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Won Hee Jung
- Department of Systems Biotechnology, Chung-Ang University, Anseong 17546, Republic of Korea
| | - Ki Hyun Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
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Xiong DS, Yang YB, Hu BY, Miao CP, Wang YL, Zou JM, Li L, Li YQ, Luo XD, Zhao LX. Myrothins A-F from Endophytic Fungus Myrothecium sp. BS-31 Harbored in Panax notoginseng. Chem Biodivers 2021; 18:e2000964. [PMID: 33533151 DOI: 10.1002/cbdv.202000964] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 01/14/2021] [Indexed: 11/07/2022]
Abstract
Endophytic fungi play important roles for host's stress tolerance including invasion by pathogenic microbes. Small molecules are common weapons in the microbe-microbe interactions. Panax notoginseng is a widely used traditional Chinese medicinal plant and harbors many endophytes, some exert functions against pathogens. Here, we report six new compounds named myrothins A-F (1-6) produced by Myrothecium sp. BS-31, an endophyte isolated from P. notoginseng, and their antifungal activities against pathogenic fungi causing host root-rot disease. Their structures were elucidated with analysis of spectroscopic data including 1D and 2D NMR, HR-ESI-MS. Myrothins B (2) and E (5) showed the weak activity against Fusarium oxysporum and Phoma herbarum, and myrothins F (6) showed weak activity against F. oxysporum.
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Affiliation(s)
- Deng-Sen Xiong
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Research and Development Center for Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China
- Yunnan Institute of Microbiology, Yunnan University, Kunming, 650091, P. R. China
| | - Ya-Bin Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Research and Development Center for Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China
| | - Bin-Yuan Hu
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Research and Development Center for Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China
| | - Cui-Ping Miao
- Yunnan Institute of Microbiology, Yunnan University, Kunming, 650091, P. R. China
| | - Yong-Liang Wang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Research and Development Center for Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China
- Yunnan Institute of Microbiology, Yunnan University, Kunming, 650091, P. R. China
| | - Jin-Mei Zou
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Research and Development Center for Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China
- Yunnan Institute of Microbiology, Yunnan University, Kunming, 650091, P. R. China
| | - Lei Li
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Research and Development Center for Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China
- Yunnan Institute of Microbiology, Yunnan University, Kunming, 650091, P. R. China
| | - Yi-Qing Li
- Yunnan Institute of Microbiology, Yunnan University, Kunming, 650091, P. R. China
| | - Xiao-Dong Luo
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Research and Development Center for Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China
| | - Li-Xing Zhao
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Research and Development Center for Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China
- Yunnan Institute of Microbiology, Yunnan University, Kunming, 650091, P. R. China
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