Biosynthesis of aspergiolide A, a novel antitumor compound by a marine-derived fungus Aspergillus glaucus via the polyketide pathway

✍ Scribed by Kejing Tao; Lin Du; Xueqian Sun; Menghao Cai; Tianjiao Zhu; Xiangshan Zhou; Qianqun Gu; Yuanxing Zhang

• Book ID: 104096150
• Publisher: Elsevier Science
• Year: 2009
• Tongue: French
• Weight: 305 KB
• Volume: 50
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/j.tetlet.2008.12.094

✦ Synopsis

Aspergiolide A, a novel antitumor compound, was produced by a marine-derived filamentous fungus Aspergillus glaucus. The biosynthesis of it was unambiguously determined by feeding experiments using [l-13 C]sodium acetate, [2-13 C]sodium acetate, and [1,2-13 C 2 ]sodium acetate precursors followed by 13 C NMR spectroscopic investigation of the isolated products. Analysis of the patterns of 13 C-enrichment revealed that all 25 carbon atoms in skeleton of aspergiolide A were derived from labeled acetate. And among them, 12 carbon atoms were labeled from the carboxylic group of acetate, while the other 13 carbon atoms were labeled from the methylic group of acetate. Besides, the labeling pattern of [1,2-13 C 2 ]sodium acetate feeding experiment demonstrated that 12 intact acetate units were incorporated in aspergiolide A by polyketide pathway.