链接器决定的折叠和疏水相互作用解释了PROTAC细胞透性的重大差异
Vasanthanathan Poongavanam1, Stefan Peintner1, Yordanos Abeje1
1Department of Chemistry - BMC, Uppsala University, Box 576, 75 123 Uppsala, Sweden.
ACS medicinal chemistry letters
|April 16, 2025
概括
细胞透性需要PROTACs (蛋白质溶解向的嵌合体) 的极地表面积较低. 链接器化学决定了PROTAC的形状和细胞透,影响了药物开发.
科学领域:
- 生物化学 生物化学
- 化学生物学 化学生物学
- 药物发现 药物发现 药物发现
背景情况:
- 为了有效的被动细胞透性,PROTACs (蛋白质分解向的嵌合体) 需要较低的极地表面积.
- 连接器的设计对于PROTAC的形状灵活性和细胞透是至关重要的.
研究的目的:
- 调查VHL PROTAC中的链接器修饰如何影响它们的结构性行为和细胞透性.
- 阐明 PROTAC 形状,溶剂可访问性和被动细胞透性之间的关系.
主要方法:
- 分子动力学 (MD) 模拟来分析 PROTAC 的结构动力学.
- 核磁共振光谱测定不同环境中的PROTAC结构.
- 两种VHL PROTACs与不同的链接器化学 (基与PEG) 的比较.
主要成果:
- 链器PROTAC表现出环境依赖的构造,在非极性介质中采用延伸的极性形式 (低透性),在水中采用折叠的,极性较低的形式.
- 在极地和非极地环境中,PEG-linker PROTAC 保持了类似的形状和极性,与高透性相关.
- 疏水性相互作用显著影响了基链体PROTAC的构造性行为.
结论:
- PROTAC链接器化学深深影响着形状适应性,因此,细胞透性.
- 在PROTAC中环境依赖的构造变化可能是它们被动细胞透性的主要决定因素.
- 理性设计的PROTAC链接器,考虑到环境的结构效应,对于优化细胞透性在药物发现至关重要.
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