红色和深红色可切割的光染料用于自我标记酶蛋白标记和GPCR共内化质疑
Kilian Roßmann1, Ramona Birke1, Joshua Levitz2
1Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP) Berlin 13125 Germany broichhagen@fmp-berlin.de.
RSC chemical biology
|November 29, 2024
概括
研究人员开发了新的红色和远红色光探针,用于SNAP和Halo标签. 这些探测器可以同时对多个内化细胞表面蛋白质进行双色可视化,有助于受体生物学研究.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生物化学
- 分子成像学分子成像学
背景情况:
- 像SNAP和Halo标签这样的自我标记蛋白质标签对于研究蛋白质贩运至关重要.
- 现有的细胞表面受体研究方法往往缺乏对同时多受体分析的正交性.
- 可切割基板允许去除未内化探头,简化了内化蛋白质的分析.
研究的目的:
- 开发用于SNAP和Halo标签的新型,不透膜的光探针.
- 为了实现内部化细胞表面蛋白质的同时,多色可视化.
- 应用这些探针来研究复杂的受体贩运和相互作用.
主要方法:
- 开发了四个新的红色到远红色光探头,具有可裂解释放的二硫化物键.
- 使用SNAP和Halo-tag蛋白系统进行特定的探头结合.
- 使用二甲二硫酸 (MESNA) 来切割未内化探头.
- 在高分辨率成像和高通量测定中的应用.
主要成果:
- 成功合成并验证了四个正交的,膜不透的探头.
- 证明了内部化G蛋白合受体 (GPCRs) 的同时双色可视化.
- 视觉化内部化甲基酸盐受体 (mGluRs),同型和异型受体.
- 揭示了GLP1R和GIPR受体之间的单向交声.
结论:
- 开发的探针提供了一个强大的工具,可以同时对内部化的细胞表面蛋白质进行多色追踪.
- 这种方法推进了复杂受体生物学研究,包括二分化和交叉声交换.
- 这种方法是多功能性的,适用于高分辨率成像和高通量查.
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