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首页> 外文期刊>The Journal of Antibiotics: An International Journal >New beauveriolides produced by amino acid-supplemented fermentation of Beauveria sp. FO-6979.
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New beauveriolides produced by amino acid-supplemented fermentation of Beauveria sp. FO-6979.

机译:氨基酸补充白僵菌发酵产生的新的甜菜碱。 FO-6979。

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摘要

Five new beauveriolides were isolated from the acetone extracts of Beauveria sp. FO-6979 mycelia fermented in amino acid-supplemented media. The structures were elucidated by spectroscopic studies including NMR experiments and chemical degradation. All the beauveriolides are cyclodepsipeptides consisting of one 3-hydroxy-4-methyl fatty acid, two L-amino acids and one D-amino acid in common. Beauveriolide VII with the structure of cyclo-[3-hydroxy-4-methyloctanoyl-L-phenylalanyl-L-alanyl-D-valyl] inhibited lipid droplet formation and cholesteryl ester synthesis in macrophages, but the other beauveriolides showed only slight or almost no effect on lipid droplet formation.
机译:从球孢白僵菌的丙酮提取物中分离出五个新的甜菜碱内酯。 FO-6979菌丝体在添加氨基酸的培养基中发酵。通过包括NMR实验和化学降解在内的光谱研究阐明了结构。所有的甜菜碱内酯都是环二肽,由共同的一种3-羟基-4-甲基脂肪酸,两种L-氨基酸和一种D-氨基酸组成。具有环-[3-羟基-4-甲基辛酰基-L-苯丙氨酰基-L-丙氨酰基-D-戊酰基]结构的白藜芦醇VII抑制巨噬细胞中脂质滴的形成和胆固醇酯的合成,但是其他的古丁苯胺化物仅显示很少或几乎没有对脂质液滴形成的影响。

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