三十年来,我们一直研究着脂氧基酶的三维结构
1Department of Pharmaceutical Biosciences, Uppsala University, Box 591, SE 751 24, Uppsala, Sweden.
Archives of biochemistry and biophysics
|December 25, 2023
概括
结构研究显示,脂氧酶酶 (LOX) 酶具有保存的U形基质腔. 抑制剂可以打开5-LOX中的腔,影响喘中介生物合成.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 酶学 是一种酶学.
背景情况:
- 脂氧酶 (LOX) 是脂质代谢中的关键酶,参与炎症途径.
- 大豆和子15-LOX的早期X射线结构揭示了保存的U形基质腔.
研究的目的:
- 审查和分析各种LOX酶与基质或抑制剂复合的3D结构.
- 了解影响LOX活动的基质结合和构造变化.
主要方法:
- 在X射线晶体学.
- 低温电子显微镜 (EM) 是一种
- 电子核双共振 (ENDOR) 与分子动力学 (MD) 计算
主要成果:
- 在不同的LOX异酶中观察到保存的U形基质腔.
- 阿拉基酸 (AA) 在8-LOX和12-LOX中结合在碳酸盐外置位置.
- 抑制剂诱导5-LOX的结构变化,通过α2-螺旋重新定位打开基质腔.
- 12-LOX存在于具有明显开放和关闭子单元的二元体.
结论:
- 3D结构数据为理解LOX机制提供了基础.
- α2-螺旋体的形状灵活性在调节LOX基板访问和活动方面发挥着至关重要的作用.
- 结构性见解对于开发向的LOX抑制剂至关重要,特别是对于喘等炎症性疾病.
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