Pseudomonas aeruginosa 鞭毛的结构性表征 FlgE 揭示了一种参与炎症调制的新型β-hairpin 元素
Yu You1, Sheng Lin1, Fanli Yang1
1Department of Emergency Medicine, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China.
International journal of biological macromolecules
|October 23, 2025
概括
Pseudomonas aeruginosa 鞭毛蛋白 (Pa-FlgE) 具有独特的结构元素. 这些元素,一个循环和域II中的新β-hairpin,对于调节宿主炎症反应至关重要.
科学领域:
- 微生物学 微生物学
- 结构生物学 结构生物学
- 免疫学 免疫学 免疫学
背景情况:
- 来自Pseudomonas aeruginosa (Pa-FlgE) 的鞭毛子子单位FlgE是细菌鞭毛的关键组成部分.
- Pa-FlgE被认为是影响宿主炎症反应的重要毒性因子.
研究的目的:
- 为了确定Pa-FlgE域I (D-I) 和域II (D-II) 的高分辨率晶体结构.
- 研究Pa-FlgE免疫调节活性的结构基础.
主要方法:
- 对Pa-FlgE域I和II的高分辨率晶体结构的确定.
- 对Pa-FlgE及其正义词进行比较结构分析.
- 通过删除特定结构元素进行功能分析.
主要成果:
- 无论是Pa-FlgE D-I还是D-II都表现出主要的β结构.
- 保存区域包括D-I和D-II的核心桶,在D-II中具有独特的外围插入.
- 在Pa-FlgE D-II中的两个插入,一个循环和一个β-hairpin,都暴露在溶剂中,对免疫调节至关重要;β-hairpin是P. aeruginosa独特的.
结论:
- Pa-FlgE 的保存域在结构上是稳定的.
- Pa-FlgE中独特的结构元素,特别是β-hairpin,对于其调节宿主炎症的作用至关重要.
- P. aeruginosa已经发展出特定的鞭毛结构,以有效地管理感染期间的主机的炎症反应.
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