LC-MS/MS-guided discovery of japonamides C and D, two new cyclohexadepsipeptides, from the Nicotiana tabacum-derived endophytic fungus Aspergillus japonicus TE-739D
文献类型： 外文期刊
作者： Wang, Haisu 1 ; Hao, Xianwei 2 ; Dong, Chen 1 ; Yuan, Xiaolong 1 ; Zhang, Peng 1 ; Gu, Gan 1 ;
作者机构： 1.Chinese Acad Agr Sci, Res Ctr Plant Funct Components, Tobacco Res Inst, Qingdao, Peoples R China
2.China Tobacco Zhejiang Ind Co Ltd, Technol Ctr, Hangzhou 310008, Peoples R China
关键词：
endophytic fungus;
期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：4.5； 五年影响因子：5.2 ）
ISSN：
年卷期： 2025 年 16 卷
页码：
收录情况： SCI
摘要： Endophytic fungi belonging to the Aspergillus genus have received substantial attention due to their notable secondary metabolic potential. In this study, chemical investigations using LC-MS/MS-based molecular networking on the endophytic fungus Aspergillus japonicus TE-739D led to the discovery of two new cyclohexadepsipeptides, namely japonamides C (1) and D (2), along with three known cyclodipeptides (3-5). Their structures, including the absolute configurations of the amino acid residues, were elucidated through spectroscopic data analysis and an optimized Marfey's method. The newly discovered compounds, japonamides C (1) and D (2), were screened for broad-spectrum cell proliferation inhibitory activity against 20 different human cell lines. The results indicated that both compounds displayed broad-spectrum antiproliferative activity against MKN-45, HCT116, TE-1, 5,637, CAL-62, and A-637 cells, with inhibition rates ranging from 55.0 to 72.3%. Moreover, the antibacterial activity of compounds 1-5 against two Gram-positive bacteria and two Gram-negative bacteria was also evaluated.
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