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Spiculisporic acid analogues of the marine-derived fungus, Aspergillus candidus strain HDf2, and their antibacterial activity

文献类型: 外文期刊

作者: Wang, Rong 1 ; Guo, Zhi Kai 2 ; Li, Xiang Min 1 ; Chen, Fu Xiao 1 ; Zhan, Xia Fei 1 ; Shen, Ming Hui 1 ;

作者机构: 1.Hainan Acad Ocean & Fisheries Sci, Haikou 570203, Peoples R China

2.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Key Lab Biol & Genet Resources Trop Crops, Minist Agr, Haikou 571101, Peoples R China

关键词: Sea urchin;Fungus;Spiculisporic acid;Antibacterial activity

期刊名称:ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY ( 影响因子:2.271; 五年影响因子:2.707 )

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收录情况: SCI

摘要: Two novel antibiotic spiculisporic acid analogues, named as spiculisporic acid F (1) and G (2), and two known compounds, (-)-spiculisporic acid (3) and secospiculisporic acid B (4), were isolated by bioactivity-guided fractionation from the fermentation broth of the sea urchin-derived Aspergillus candidus strain HDf2. Their structures were unambiguously established by comprehensive analysis of 1D and 2D NMR, and high-resolution MS spectra, and by comparison with known compounds. Biological experiments demonstrated that compounds 1 and 2 displayed antibacterial activity against Gram-negative Pseudomonas solanacearum and Gram-positive Staphylococcus aureus, but showed no cytotoxicity against SGC-7901 human gastric adenocarcinoma and SPC-A-1 human lung adenocarcinoma tumor cell lines. This is the first critical evidence identifying spiculisporic acid derivatives as a potential bio-control agent for the soil borne pathogen P. solanacearum (E. F. Smith) Smith. These findings provide further insight into the chemical and biological activity diversity of this class of compounds.

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