双基质KDO8P合成酶抑制剂的抑制模式:一个频率选择性的REDOR固态和溶液NMR表征
Lilia Kaustov1, Shifi Kababya, Valery Belakhov
1Department of Chemistry and Institute of Catalysis Science and Technology, Technion-Israel Institute of Technology, Haifa 32000, Israel.
Journal of the American Chemical Society
|April 10, 2003
概括
这项研究使用一种新型分子研究了KDO8PS的抑制. 核磁共振 (NMR) 数据显示,该抑制剂与阿拉比诺-5-酸盐位结合,允许同时结合PEP,这表明混合类型的抑制.
科学领域:
- 生物化学 生物化学
- 酶学 是一种酶学.
- 结构生物学 结构生物学
背景情况:
- 3-deoxy-d-manno-2-octulosonate-8-phosphate synthase (KDO8PS) 是细菌脂多糖生物合成中的一个关键酶.
- 基于机制的抑制剂对于开发新型抗菌剂至关重要.
- 之前的研究显示了关于抑制剂结合模式的相互矛盾的数据.
研究的目的:
- 阐明一种新型KDO8PS抑制剂的确切抑制模式 (2).
- 解决固态NMR和晶体结构数据之间的差异.
- 为了研究抑制剂及其天然基质的结合相互作用.
主要方法:
- 固态REDORNMR是指固态REDOR的固态NMR是指固态REDOR的固态NMR是指固态REDOR的固态REDOR的固态NMR是指固态REDOR的固态NMR是指固态REDOR的固态NMR.
- (31) P 溶液的 NMR 是一种 P 溶液的 NMR.
- 对酶 - 配体复合物的分析.
- 开发一种新的频率选择性REDOR实验.
主要成果:
- 抑制剂 (2) 与KDO8PS.的阿拉比诺-5-酸盐 (A5P) 亚站点结合.
- 基酸 (PEP) 的结合不受抑制剂的存在的影响.
- 一个三元复合体形式,表明PEP和抑制剂 (2) 的同时结合,表明PEP的混合类型抑制.
- 模仿A5P的部分比模仿PEP的部分结合得更强.
结论:
- 抑制剂 (2) 对KDO8PS.表现出混合类型的抑制.
- 固态NMR可以错过弱相互作用,特别是在样品处理后,如冷化.
- 了解这些结合动态对于设计有效的KDO8PS向抗菌剂至关重要.
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