Journal
NATURAL PRODUCT RESEARCH
Volume 28, Issue 13, Pages 994-997Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786419.2014.902945
Keywords
gut fungus; Aspergillus flavipes; cyclopeptide; 5-methoxyanthranilic acid; 3-aminoacrylic acid
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Funding
- National Natural Science Foundation of China (NSFC) [21102128]
- Qianjiang Excellence Project of Zhejiang Province [2010R10053]
- Union Opening Foundation of CAS' Key Laboratory of Marine-resources Sustainable Utilization, Chinese Academy of Sciences [LMB121004]
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A new cyclopeptide, together with three known amino acid derivatives, was isolated from marine-derived fungus Aspergillus flavipes, which was found in the gut of isopod Ligia oceanica. The novel peptide contains four amino acid units, proline, 5-methoxyanthranilic acid, isoleucine and 3-aminoacrylic acid. Its structure was determined on the basis of NMR, HR-MS and MSn spectral data analysis. The two unusual amino acid residues, 5-methoxyanthranilic acid and 3-aminoacrylic acid, were first found in natural product. The known compound N-benzoyl-phenylalanine methyl ester was first found as fungal metabolite. This is the first report of natural products isolated from marine gut fungi.
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