SGIP1与大麻素受体1的α-螺旋形H9域结合,促进了轴突表面表达
Alexandra Fletcher-Jones1, Ellen Spackman1, Tim J Craig2
1School of Biochemistry, Centre for Synaptic Plasticity, University of Bristol, Biomedical Sciences Building, Bristol, BS8 1TD, UK.
该研究显示,适应蛋白SGIP1与大麻素受体1 (CB1R) 的H9域结合,以增强其在轴突表面的表达,这对内分泌大麻素信号传递至关重要.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 通过大麻素受体1 (CB1R) 传递内分类素信号对突触神经调节至关重要.
- CB1R需要极化轴突表面表达来发挥其功能,但其潜在机制尚未完全理解.
- 以前,CB1R的细胞内H9域与轴突表面表达有关.
研究的目的:
- 阐明CB1R H9域调解轴突表面表达的机制.
- 识别与CB1R H9域相互作用并调节其局部化的蛋白质.
- 了解这种相互作用对突触传输的功能后果.
主要方法:
- 用初级大鼠神经元培养来研究CB1R局部化.
- 实验涉及SGIP1 (排序nexin相互作用蛋白1) 的过度表达和敲击.
- 使用免疫光学和电生理学 (测量突触前Ca2+流入).
主要成果:
- CB1R的H9域直接与内细胞适应蛋白SGIP1.1结合.
- SGIP1过度表达增加了CB1R轴突表面表达,而SGIP1倒置则减少了它.
- SGIP1操纵没有影响缺乏H9域 (CB1RΔH9) 的CB1R.
- SGIP1敲击损害了CB1R介导的前突触Ca2+流入的抑制.
结论:
- SGIP1与CB1R H9域的相互作用对于促进CB1R的轴突表面表达至关重要.
- 这种相互作用对于调节内分泌大麻素信号传递中的前突触反应至关重要.
- 这些发现提供了神经元中SGIP1和CB1R功能之间的机制联系.
更多相关视频
11:57Using an α-Bungarotoxin Binding Site Tag to Study GABA A Receptor Membrane Localization and Trafficking
Published on: March 28, 2014
14:02Optimizing the Genetic Incorporation of Chemical Probes into GPCRs for Photo-crosslinking Mapping and Bioorthogonal Chemistry in Live Mammalian Cells
Published on: April 9, 2018
相关概念视频
IP3/DAG Signaling Pathway
GPCR Desensitization
GPCRs Regulate Adenylyl Cylase Activity
G Protein-coupled Receptors
GPCRs are also called heptahelical, 7TM, or serpentine receptors, and consist of seven (H1-H7) transmembrane alpha-helices that span the bilayer to form a cylindrical core. The transmembrane helices are connected by three extracellular loops and three...
Transducer Mechanism: G Protein–Coupled Receptors
GPCRs are also called heptahelical,...
Assembly of Signaling Complexes
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
