选择性阿扎-迈克尔添加到自然抗菌中的脱水氨基酸
Michela Vargiu1, Yanli Xu2, Oscar P Kuipers2
1Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747AG, Groningen, The Netherlands.
研究人员开发了一种β-氨基化方法,用于在核糖体合成和翻译后修改 (RiPPs) 中修改脱氨基酸. 这改善了Thiostrepton的性能.
科学领域:
- 生物化学 生物化学
- 有机化学 有机化学
- 类化学 类化学
背景情况:
- 核糖体合成和翻译后改性 (RiPPs) 是一类多样化的天然产品.
- 非规范性氨基酸,如脱氨基酸,是许多RiPP的关键结构特征.
- 修改这些非正规氨基酸可以改变RiPPs的特性和活动.
研究的目的:
- 开发一种高效,选择性地方法来修改RiPP中的脱氨基酸.
- 调查β-氨基化对RiPPs,特别是thiostrepton和nisin的特性的影响.
- 评估修改后的RiPPs的水溶性和抗菌活性的变化.
主要方法:
- 使用β-氨基化的非正规脱氨基酸的选择性修改.
- 改性的化学合成和净化.
- 使用分析技术对改性的表征.
- 测试以确定水溶性和抗菌活性 (MIC).
主要成果:
- 在RiPP中实现了脱氨基酸的高效和选择性β-氨基化.
- 类Thiostrepton显示出水溶性显著增加 (高达35倍).
- 修改后的thiostrepton的抗菌活性仍然很大,尽管与未修改的相比略有降低.
- 使用这种方法也成功地修改了兰氏尼.
结论:
- β-氨基化是一种可行的策略,用于修改RiPPs中的脱氨基酸.
- 这种修改可以提高RiPPs的水溶性,例如Thiostrepton,而不会完全取消抗菌活性.
- 该方法适用于不同类型的RiPPs,包括 thiopeptides 和 lanthipeptides.
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