Integrative Biology Journals

Natural Products and Bioprospecting ›› 2024, Vol. 14 ›› Issue (6): 61-61.DOI: 10.1007/s13659-024-00481-9

• ORIGINAL ARTICLES • Previous Articles    

Discovery of structurally diverse sesquiterpenoids from Streptomyces fulvorobeus isolated from Elephas maximus feces and their antifungal activities

Lu Cao1, Jun-Feng Tan1, Zeng-Guang Zhang1, Jun-Wei Yang1, Yu Mu1, Zhi-Long Zhao2, Yi Jiang3, Xue-Shi Huang1, Li Han1   

  1. 1. Institute of Microbial Pharmaceuticals, College of Life and Health Sciences, Northeastern University, Shenyang 110819, China;
    2. Pharmacological Laboratory, Liaoning Provincial Institute of Drug Inspection and Testing, Shenyang 110036, China;
    3. Yunnan Institute of Microbiology, Yunnan University, Kunming 650091, China
  • Received:2024-09-02 Online:2024-12-13 Published:2024-12-24
  • Contact: Yi Jiang,E-mail:jiangyi@ynu.edu.cn;Xue-Shi Huang,E-mail:huangxs@mail.neu.edu.cn;Li Han,E-mail:hanli@mail.neu.edu.cn
  • Supported by:
    This work was supported by National Natural Science Foundation of China (Grant No. 32060001), the Fundamental Research Funds for the Central Universities, China (No. N2320001) and the Construction Project of Liaoning Provincial Key Laboratory, China (2022JH13/10200026).

Discovery of structurally diverse sesquiterpenoids from Streptomyces fulvorobeus isolated from Elephas maximus feces and their antifungal activities

Lu Cao1, Jun-Feng Tan1, Zeng-Guang Zhang1, Jun-Wei Yang1, Yu Mu1, Zhi-Long Zhao2, Yi Jiang3, Xue-Shi Huang1, Li Han1   

  1. 1. Institute of Microbial Pharmaceuticals, College of Life and Health Sciences, Northeastern University, Shenyang 110819, China;
    2. Pharmacological Laboratory, Liaoning Provincial Institute of Drug Inspection and Testing, Shenyang 110036, China;
    3. Yunnan Institute of Microbiology, Yunnan University, Kunming 650091, China
  • 通讯作者: Yi Jiang,E-mail:jiangyi@ynu.edu.cn;Xue-Shi Huang,E-mail:huangxs@mail.neu.edu.cn;Li Han,E-mail:hanli@mail.neu.edu.cn
  • 基金资助:
    This work was supported by National Natural Science Foundation of China (Grant No. 32060001), the Fundamental Research Funds for the Central Universities, China (No. N2320001) and the Construction Project of Liaoning Provincial Key Laboratory, China (2022JH13/10200026).

Abstract: Thirty-six structurally diverse sesquiterpenoids, including caryolanes (1-12), germacranes (13-16), isodaucane (17), cadinanes (18-22), epicubenols (23, 24), oplopanane (25), pallenanes (26, 27), and eudesmanes (28-36), were isolated from the fermentation broth of Streptomyces fulvorobeus derived from Elephas maximus feces. Pallenane is a kind of rarely reported sesquiterpene with a distinctive C5/C3 bicyclic skeleton and was firstly found from microbial source. The structures of fifteen new compounds (1-4, 13-15, 17, 18, 22, 23, 25-28) were established through detailed spectroscopic data analysis, which included data from experimental and calculated ECD spectra as well as Mosher’s reagent derivative method. Compound 34 exhibited moderate antifungal activity against Cryptococcus neoformans and Cryptococcus gattii with MIC values of 50 μg/mL. It effectively inhibited biofilm formation and destroyed the preformed biofilm, as well as hindered the adhesion of Cryptococcus species. The current work would enrich the chemical diversity of sesquiterpenoid family.

Key words: Sesquiterpenoids, Streptomyces fulvorobeus, Fermentation, Antifungal activity

摘要: Thirty-six structurally diverse sesquiterpenoids, including caryolanes (1-12), germacranes (13-16), isodaucane (17), cadinanes (18-22), epicubenols (23, 24), oplopanane (25), pallenanes (26, 27), and eudesmanes (28-36), were isolated from the fermentation broth of Streptomyces fulvorobeus derived from Elephas maximus feces. Pallenane is a kind of rarely reported sesquiterpene with a distinctive C5/C3 bicyclic skeleton and was firstly found from microbial source. The structures of fifteen new compounds (1-4, 13-15, 17, 18, 22, 23, 25-28) were established through detailed spectroscopic data analysis, which included data from experimental and calculated ECD spectra as well as Mosher’s reagent derivative method. Compound 34 exhibited moderate antifungal activity against Cryptococcus neoformans and Cryptococcus gattii with MIC values of 50 μg/mL. It effectively inhibited biofilm formation and destroyed the preformed biofilm, as well as hindered the adhesion of Cryptococcus species. The current work would enrich the chemical diversity of sesquiterpenoid family.

关键词: Sesquiterpenoids, Streptomyces fulvorobeus, Fermentation, Antifungal activity