该RavA-ViaA伴侣复合物通过与烟酸还原酶的关联来调节细菌的持久性
Vaibhav Bhandari1, Sean E Reichheld2, Scott Houliston3
1Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada.
The Journal of biological chemistry
|September 3, 2023
概括
调节ATPase变体A (RavA) 和与AAA+ATPase (ViaA) 相互作用的·威尔布兰德因子A型伴侣复合物通过与烟酸还原酶结合,有助于细菌抵抗抗生素的持久性. 调节RavA-ViaA水平可能会增加阴性细菌对抗生素的敏感性.
科学领域:
- 微生物学 微生物学
- 结构生物学 结构生物学
- 生物化学 生物化学
背景情况:
- 调节ATPase变体A (RavA) 和与AAA+ATPase (ViaA) 相互作用的威尔布兰德因子A型是与大肠杆菌无氧呼吸相关的MoxR AAA+蛋白质.
- 这种复合物与烟酸还原酶 (Frd) 电子运输复合物相互作用,表明伴侣类活性.
- 之前的研究表明,RavA-ViaA使大肠杆菌对氨基甘油酸抗生素敏感.
研究的目的:
- 调查RavA-ViaA陪伴复合体在细菌抗生素耐药性中的功能作用.
- 探索RavA-ViaA,烟酸还原酶 (Frd) 和抗生素耐药性之间的关系.
- 为了确定RavA-ViaA函数的结构基础.
主要方法:
- 核磁共振 (NMR) 光谱测定ViaA的N端域的结构.
- 功能性试验评估RavA-ViaA在细菌持久性和抗生素敏感性中的作用.
- 研究RavA-ViaA与Frd复合体之间的相互作用.
主要成果:
- 核磁共振结构揭示了ViaA的N端域中的一个新的α螺旋折叠,称为VAN折叠,对于陪伴组合的功能至关重要.
- 发现RavA-ViaA通过与Frd.的关联,在抗生素治疗后对细菌的持久性起作用.
- 这项研究证实了RavA-ViaA伴侣复合体与Frd电子运输复合体的关联.
结论:
- 该RavA-ViaA陪伴组合通过与Frd.的相互作用,有助于细菌抗生素的持久性.
- 在ViaA的新型VAN折叠对该综合体的功能至关重要.
- 准RavA-ViaA水平是一个潜在的策略,可以提高抗生素对抗革兰氏阴性细菌的疗效.
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