来自Helicobacter pylori的dihydroorotate脱酶的晶体结构与结合的flavin mononucleotide有关
Ashna A Agarwal1, John D Georgiades1, David M Dranow2
1Department of Biology, Washington University in St Louis School of Medicine, St Louis, MO 63114, USA.
杆菌二二酸脱酶 (HpDHODH) 晶体结构揭示了药物开发的关键相互作用. 了解它的膜关联和ubiquinone利用为对抗H. pylori感染提供了新的途径.
科学领域:
- 生物化学 生化学
- 结构生物学 结构生物学
- 微生物学 微生物学
背景情况:
- 杆菌感染影响全球一半以上的人口,导致胃潰瘍疾病.
- 越来越多的抗生素耐药性需要针对H. pylori的新型治疗策略.
- 氨酸脱酶 (DHODH) 是H. pylori必需核酸生物合成途径中的一个关键酶.
研究的目的:
- 确定H. pylori DHODH (HpDHODH) 的晶体结构,以指导药物发现.
- 阐明HpDHODH功能,辅因子结合和膜协会的结构基础.
- 提供对H. pylori潜在药物向机制的见解.
主要方法:
- 在2.25 Å分辨率 (PDB: 6b8s) 获得HpDHODH结构的X射线晶体学.
- 大规模的生物信息学分析以确定进化同类.
- 酶-辅助因子相互作用和膜关联的生物化学分析.
主要成果:
- 确定了HpDHODH的晶体结构,揭示了保存的活性位点特征.
- 确定了HpDHODH及其黄单核酸 (FMN) 辅因子之间的关键极性相互作用.
- 发现了结构特征,使内部膜协会和ubiquinone利用,包括一个疏水通道.
结论:
- 该HpDHODH结构为其与ubiquinone和FMN的相互作用提供了分子基础.
- 已识别的结构元素解释了基于pyrazole的化合物抑制,指导了未来的药物设计.
- 这种结构性理解有助于开发新的,无抗性治疗方法来治疗H. pylori感染.
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