抗微生物生物双功能驼乳酸:在和分子动态视角
Maathir N Alhumam1, Naser Alhumam2, Mahmoud Kandeel3,4
1College of Medicine, King Faisal University, Al Hofuf, Al-Ahsa, Saudi Arabia.
BioMed research international
|June 1, 2023
概括
与牛和人类相比,驼乳酪蛋白 (cLF) 具有独特的结构动力学和灵活性,特别是在去除铁后的C叶中. 这表明先天免疫蛋白中存在着明显的分子相互作用和进化关系.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 免疫学 免疫学 免疫学
背景情况:
- 乳酸 (LF) 是一种在体液中发现的关键的先天性免疫蛋白,对抗微生物活性至关重要.
- LF的功能和结构与其铁结合能力密切相关,存在于开放和封闭的构造.
研究的目的:
- 为了研究驼 (cLF),牛 (bLF) 和人类 (hLF) 乳酪蛋白在去除铁后的封闭形式的结构变化.
- 为了比较驼乳酪蛋白与其他哺乳动物物种的进化关系.
主要方法:
- 来自不同动物群体的cLF和LF之间的序列比较分析.
- 分子动力学 (MD) 模拟以评估铁化后cLF,bLF和hLF的结构灵活性和行为.
- 根平均平方偏差 (RMSD),根平均平方波动 (RMSF),键和溶剂可访问表面积 (SASA) 的分析.
主要成果:
- 驼乳酪蛋白与陆地哺乳动物相比,与海洋哺乳动物和蝙蝠更接近.
- 与BLF和HLF相比,cLF表现出明显更高的结构动态和灵活性 (更高的RMSD,RMSF,SASA;较低的键).
- 在没有铁的情况下,cLF的N和C叶表现出不同的行为和稳定性,而C叶更具动态性.
结论:
- 相比于牛和人类乳酪蛋白,驼乳酪蛋白具有独特的结构和动态特性,特别是关于其铁结合部位.
- cLF的独特特征表明,在先天免疫系统中,有专门的分子相互作用和潜在的不同的功能作用.
- 驼乳酪蛋白的进化分歧突出了乳酪蛋白家族内的独特适应.
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