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首页> 外文期刊>Journal of natural products >Cyclic tripeptides from the halotolerant fungus Aspergillus sclerotiorum PT06-1.
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Cyclic tripeptides from the halotolerant fungus Aspergillus sclerotiorum PT06-1.

机译:来自耐盐菌真菌菌曲霉PT06-1的环状三肽。

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摘要

Eleven new aspochracin-type cyclic tripeptides, sclerotiotides A-K (1-11), together with three known compounds, JBIR-15 (12), aspochracin (13), and penicillic acid, were isolated from the ethyl acetate extract of the fermentation broth of the halotolerant Aspergillus sclerotiorum PT06-1 in a hypersaline nutrient-rich medium. Their structures were elucidated by spectroscopic analysis and chemical methods. Chemical transformations of 12 and 13 proved that sclerotiotides D-K (4-11) were artifacts probably formed during the fermentation or subsequent isolation steps. All 13 cyclic tripeptides have been evaluated for their antimicrobial and cytotoxic effects. Only sclerotiotides A (1), B (2), F (6), and I (9) and JBIR-15 (12) showed selective antifungal activity against Candida albicans with MIC values of 7.5, 3.8, 30, 6.7, and 30 microM, respectively.
机译:从11种发酵液的乙酸乙酯提取物中分离出11种新的天孢菌素型环状三肽巩膜肽AK(1-11),以及三种已知的化合物JBIR-15(12),天霉素(13)和青霉素。在高盐营养丰富的培养基中添加卤代菌曲霉菌PT06-1。通过光谱分析和化学方法阐明了它们的结构。 12和13的化学转化证明菌核蛋白D-K(4-11)是可能在发酵或后续分离步骤中形成的假象。已经评估了所有13种环状三肽的抗微生物和细胞毒性作用。只有硬核菌素A(1),B(2),F(6)和I(9)和JBIR-15(12)对白色念珠菌具有选择性的抗真菌活性,MIC值为7.5、3.8、30、6.7和30 microM。

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