三基扎尔多克西姆是ThDP依赖的DXP合成酶的氧化还原循环抑制剂
Charles R Nosal1,2, Ananya Majumdar3, Netzahualcóyotl Arroyo-Currás1,2
1Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
bioRxiv : the preprint server for biology
|March 17, 2025
概括
三基双胺通过诱导乳酸-ThDP脱氧化来抑制细菌的1-Deoxy-d-xylulose-5-phosphate合成酶 (DXPS). 这些化合物在有氧条件下作为氧化还原循环抑制剂,为药物开发提供了新的策略.
科学领域:
- 生物化学 生物化学
- 酶学 是一种酶学.
- 药物发现 药物发现 药物发现
背景情况:
- 病原性细菌需要适应生存,其中1-Deoxy-d-xylulose-5-phosphate合成酶 (DXPS) 是一个关键的酶和药物标.
- DXPS利用硫胺二酸盐 (ThDP) 合成DXP,这是异oprenoids和B族维生素的前体,并通过一种涉及乳酸-ThDP (LThDP) 中间体的联结机制运作.
研究的目的:
- 阐明三基扎尔多克西姆对DXPS的抑制机制.
- 要确定这些抑制剂是否阻止LThDP激活或诱导激活.
主要方法:
- 机械学研究涉及动力学测试.
- 长距离1H-15N HSQC核磁共振和电化学测量.
- 结构与活动关系 (SAR) 研究.
主要成果:
- 在性有氧条件下氧化三二多西,在氧气限制下功效降低.
- 抑制剂的氧化形式诱导LThDP脱碳化,导致乙-ThDP的形成.
- 甲基醇部分调节氧化物的氧化还原活性,化合物在有氧条件下作为氧化还原循环抑制剂.
结论:
- 三基扎尔多克西姆 (Trihydroxybenzaldoximes) 通过诱导LThDP脱氧化而作为DXPS的氧化还原循环抑制剂.
- 了解这种氧化还原机制为开发DXPS向抑制剂和选择性探针提供了新的见解.
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