强大的抑制E.E. 大肠杆菌DXP合成酶由一个gem-Diaryl双基质类似物
Lauren B Coco1, Eucolona M Toci1, Percival Yang-Ting Chen2
1Department of Pharmacology and Molecular Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States.
ACS infectious diseases
|March 21, 2024
概括
由于抗生素耐药性不断上升,针对细菌1-脱氧-d-西卢5-酸盐合成酶 (DXPS) 的新型抗菌剂至关重要. 研究人员开发了一种强大的DXPS抑制剂,化合物8,为抗击细菌病原体提供了一种新的策略.
科学领域:
- 生物化学 生化学
- 微生物学 微生物学
- 药物发现 药物发现 药物发现
背景情况:
- 抗生素耐药性需要针对重要细菌通路的新型抗菌策略.
- 细菌的1-deoxy-d-xylulose 5-phosphate synthase (DXPS) 是中心代谢中的一个关键酶,对病原体的生存至关重要.
- DXPS催化了DXP的形成,这对于合成维生素和异类化合物至关重要.
研究的目的:
- 设计和合成针对细菌DXPS的新型抑制剂.
- 阐明二基基质类似物对DXPS抑制的结构基础.
- 为了确定潜在的抗微生物药物开发的强效抑制剂.
主要方法:
- 使用X射线晶体学来确定大肠杆菌DXPS的结构,并使用结合的双基质类似物.
- 进行了结构-活性关系研究,以优化抑制剂的功效.
- 进行了酶动力学和结合试验,以描述抑制剂的行为.
主要成果:
- 获得了DXPS的第一个晶体结构,其中一个双基质模拟物与活性部位结合.
- 结构导向设计导致发现化合物8,一种低纳米 DXPS 抑制剂.
- 化合物8表现出缓慢,紧密结合的抑制,其中关键的相互作用涉及大肠杆菌DXPS残留物R99和R478.
结论:
- 化合物8代表了迄今为止发现的最强大的DXPS抑制剂.
- 这项研究揭示了大肠杆菌DXPS残留R99.9的新型抑制作用.
- 这项研究为开发一种针对细菌DXPS的新类抗菌剂提供了基础.
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