以结构为导向的奥托彼得林1抑制剂的发现揭示了在内亚单元界面的可药结合点
Batuujin Burendei1, Joshua P Kaplan2,3, Gerardo M Orellana2
1Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA, USA.
研究人员确定了小分子抑制剂的Otopetrins (OTOPs),质子选择性离子通道对于功能,如酸味感知至关重要. 这些抑制剂在低至中微米范围内有效,为研究OTOP通道活性和结构提供了新的工具.
科学领域:
- 离子通道生物物理学
- 分子药理学分子药理学
- 感官神经科学是一种神经科学.
背景情况:
- 穿过细胞膜的质子导电性对于pH调节和电信号,包括酸味感知至关重要.
- 奥托佩特林 (OTOP) 是真核质子选择性离子通道,OTOP1 被确定为酸味和化的传感器.
- 调节OTOP通道活动的工具的有限可用性阻碍了对其结构功能关系和生理作用的研究.
研究的目的:
- 为了确定小分子调节器的Otopetrin (OTOP) 通道.
- 描述已识别的OTOP抑制剂的结合部位和作用机制.
- 为未来的OTOP研究提供新的工具箱分子.
主要方法:
- 基于分子对接的斑马鱼OTOP1结构的虚拟选.
- 全细胞补丁电生理学用于识别化合物的功能测试.
- 低温电子显微镜以确定与抑制剂结合的结构和结合部位.
主要成果:
- 确定了几种OTOP1的小分子抑制剂,其有效性在低至中微米范围内.
- 化EM结构揭示了OTOP1.1的内单元界面内的抑制剂结合部位.
- 突变通道的功能测试验证了已识别的结合口袋.
结论:
- 小分子可以通过结合特定的内亚子单元接口,有效地抑制OTOP通道活性.
- 已识别的抑制剂和结合部位为开发有针对性的OTOP调节器提供了基础.
- 这些发现为未来对OTOP通道功能和生理学的研究提供了有价值的工具.
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