纳塔胺干扰了模型膜中依赖于厄戈斯特的脂质相
Vibeke Akkerman1, Holger A Scheidt2, Peter Reinholdt3
1Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230, Odense M, Denmark.
BBA advances
|September 11, 2023
概括
纳塔米辛是一种抗真菌剂,破坏了细胞膜中的脂质包装,特别是那些含有厄戈斯特的细胞膜. 这种相互作用可能解释了它对酵母菌感染的选择性抗真菌活性.
科学领域:
- 生物化学 生物化学
- 生物物理学的生物物理.
- 膜生物学 膜生物学
背景情况:
- 纳塔米辛是一种抗真菌的聚烯宏化物,作为食品防腐剂和用于治疗真菌感染.
- 它的确切作用机制,特别是其非毛孔形成活动,仍然不太清楚.
研究的目的:
- 为了阐明纳他素抗真菌作用的分子机制.
- 为了研究纳他素与膜固醇的相互作用及其对膜性质的影响.
主要方法:
- 核磁共振 (NMR) 光谱测定脱醇和脂质的核磁共振.
- 分子动力学 (MD) 模拟.分子动力学 (MD) 模拟.
- 超紫外线敏感显微镜的巨型单囊泡 (GUVs).
主要成果:
- 纳塔amycin减缓了液体排序 (Lo) 膜中的固醇流动性,并影响了水的透性.
- 纳塔胺破坏了依赖于固醇的脂质包装,增加了膜溶剂的可访问性,特别是在含有固醇的膜中.
- 在含有厄戈斯特的GUV中,纳塔米辛对含有欧戈斯特的Lo阶段具有较高的亲和力,这表明它与醇丰富的域具有特定的相互作用.
结论:
- 纳塔amycin 特别与固醇诱导的有序膜相相互作用.
- 脂质包装的破坏和在富含厄戈斯特的膜中溶剂的可达性增加,可能是纳塔米选择性抗真菌功效的基础.
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