Journal of Tropical Oceanography ›› 2023, Vol. 42 ›› Issue (5): 154-160.doi: 10.11978/2022232CSTR: 32234.14.2022232

• Exploitation of Marine Resources • Previous Articles     Next Articles

Study on the secondary metabolites of fungus Aspergillus sp. GXIMD02003 derived from marine sediment in the Weizhou island

XING Nannan1,2(), REN Runxin1,3, TANG Zhenzhou1,3, LUO Zhihong1,3, XIA Chenxi1,3, LIU Yonghong1,3, PENG Liang4(), CHEN Xianqiang1,3()   

  1. 1. Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China
    2. Guangxi Key Laboratory of Chinese Medicine Foundation Research, Guangxi University of Chinese Medicine, Nanning 530200, China
    3. Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China
    4. Engineering Center for Fine Chemicals, School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, China
  • Received:2022-11-01 Revised:2022-12-30 Online:2023-09-10 Published:2023-01-03
  • Supported by:
    Guangxi Science and Technology Base and Talent Special Project(AD21075016); Natural Science Foundation of Guangxi Province(2020GXNSFAA297163); Natural Science Foundation of Guangxi Province(2020GXNSFGA297002); Special Fund for Bagui Scholars of Guangxi(05019055); Open Project of Engineering Center of Jiangxi University for Fine Chemicals(JFCEC-KF-2101); Special Scientific Research Fund for Team of Institute of Marine Drugs of Guangxi University of Chinese Medicine(2018ZD005-A02); Project of Guangxi Key Laboratory of Chinese Medicine Foundation Research(22-065-53-01)

Abstract:

To explore the diversity of secondary metabolites of fungus Aspergillus sp. GXIMD02003 derived from marine sediment, its secondary metabolites were separated based on the various chromatographic techniques. Chemical structures were identified using mass spectroscopy, nuclear magnetic resonance spectroscopy, and optical rotation combined with comparison of literature data. Eight compounds were isolated from Aspergillus sp. GXIMD02003, and identified as (3S, 11aS)-3-[(1H-indol-3-yl)methyl]-7, 9-dihydroxy-8-methoxy-2,3,11,11a-tetrahydro-6H-pyrazino[1,2-b]isoquinoline-1,4-dione (1), cyclo(L-Pro-L-Tyr) (2), cyclo(L-4-Hyp-D-phe) (3), cyclo(L-4-Hyp-L-Phe) (4), cyclo(L-4-Hyp-L-leucine) (5), cyclo(L-4-Hyp-D-leucine) (6), desmethyldiaportinol (7), 2-(2ʹ-hydroxypropyl)-5-methyl-7-hydroxychromone (8). Compounds 1~8 showed no inhibitory activities against cancer cell proliferation, α-glucosidase and pathogenic bacteria at testing concentration. Compounds 1~8 were isolated from fungus derived from marine sediment of the Weizhou island for the first time. The project enriched the diversity of secondary metabolites from Aspergillus sp. GXIMD02003, laid a foundation for exploring the bioactivity of fungal secondary metabolites from marine sediment in the Weizhou island.

Key words: marine fungus, Aspergillus, secondary metabolites, marine sediment, Weizhou Island