对人类多特异性有机离子载体OAT1和OAT4的结构见解
Wei Zhang1, Youfu Chu1, Ziyang Shan1
1Shanghai Fifth People's Hospital, Fudan University, and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism (Ministry of Science and Technology), Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China.
Cell reports
|July 10, 2025
概括
对有机离子载体 (OAT) 的结构洞察力揭示了OAT1中保存的结合机制和OAT4中不同的相互作用. 这项研究有助于设计药物和管理涉及脏和胎盘输送器的相互作用.
科学领域:
- 结构生物学是结构生物学.
- 分子药理学分子药理学
- 膜运输蛋白质 膜运输蛋白质
背景情况:
- 有机离子载体 (OAT) 对于消除有机离子,包括药物和代谢物至关重要.
- 中的OAT1和和胎盘中的OAT4是具有重要的生理作用的关键输送体.
- 了解OAT结构-功能关系对于药物开发和预测药物相互作用至关重要.
研究的目的:
- 阐明人体OAT1和OAT4.4的联体结合的结构基础.
- 描述各种有机离子与OAT1和OAT4的结合方式.
- 为针对OAT的合理药物设计提供结构框架.
主要方法:
- 使用冷电子显微镜 (cryo-EM) 来确定高分辨率结构.
- 人类OAT1的结构以apo形式被解决,并与probenecid,adefovir,cefazolin和para-aminohippuric acid (PAH) 复杂化.
- 人类OAT4的结构也得到了解决,在apo形式和复杂化与脱水二二酸盐 (DHEAS).
主要成果:
- 在OAT1中确定了一种保存的联结模式,涉及用于联结紧的芳香残留物和用于定向的充电残留物.
- 这种OAT1结合模式在SLC22输送器家族中似乎很常见.
- OAT4对DHEAS表现出一种独特的结合模式,突出显示了OATs的多种特异性.
结论:
- 确定的结构为OAT1和OAT4.4提供了前所未有的原子级细节.
- 研究结果显示,OAT家族中存在着保存和独特的联结机制.
- 这些结构信息对于设计新疗法和管理OAT介导的药物相互作用至关重要.
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