P75与Nogo受体相互作用,作为Nogo,MAG和OMgpp的共同受体
Kevin C Wang1, Jieun A Kim, Rajeev Sivasankaran
1Division of Neuroscience, Children's Hospital and Program in Neuroscience, Harvard Medical School, 320 Longwood Avenue, Boston, Massachusetts 02115, USA.
Nature
|November 8, 2002
概括
像Nogo-A这样的髓抑制剂通过Nogo受体 (NgR) 阻断神经生长. p75蛋白与ngr相互作用,作为这一抑制的关键信号转换器.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 几个髓成分通过Nogo受体 (NgR) 发出信号来抑制神经元外生长.
- 定甘氨酸酸 (GPI) 的ngr需要一个共同受体来传输信号到神经元.
研究的目的:
- 为了识别与NgR相互作用的跨膜蛋白,用于信号传导.
- 调查p75在调解髓衍生的神经元外生抑制中的作用.
主要方法:
- 同免疫沉以证明p75-NgR相互作用.
- 使用p75淘汰赛小鼠进行神经反应测定.
- 在初级神经元中使用截断的p75蛋白的功能研究.
主要成果:
- p75特别与Nogo受体 (NgR) 相互作用.
- 缺少p75的神经元对髓抑制剂和ngr配体没有反应.
- 阻止p75-NgR相互作用或过度表达截断的p75会减弱抑制信号.
结论:
- p75作为一个信号传感器,用于NGR介导的抑制神经元外生长.
- 准p75-NgR复合体为促进中枢神经系统中轴突再生提供了一个潜在的治疗策略.
相关概念视频
G-protein Coupled Receptors
G-protein coupled receptors are ligand binding receptors that indirectly affect changes in the cell. The actual receptor is a single polypeptide that transverses the cell membrane seven times creating intracellular and extracellular loops. The extracellular loops create a ligand specific pocket which binds to neurotransmitters or hormones. The intracellular loops holds onto the G-protein.
Coat Assembly and GTPases
Vesicles incorporate different coat protein subunits in different cell locations, which changes the properties of the coat, such as the shape and geometry of the transport vesicles. Thus, vesicle coat proteins also play a significant role in cargo selection.
Coat assembly depends on the local availability of phosphatidylinositol phosphates or PIPs and GTP-binding proteins. Adaptor proteins, which link the coat proteins to the membrane, bind to these PIPs and play a crucial role in controlling...
Coat assembly depends on the local availability of phosphatidylinositol phosphates or PIPs and GTP-binding proteins. Adaptor proteins, which link the coat proteins to the membrane, bind to these PIPs and play a crucial role in controlling...
G-protein Coupled Receptors
G-protein coupled receptors are ligand binding receptors that indirectly affect changes in the cell. The actual receptor is a single polypeptide that transverses the cell membrane seven times creating intracellular and extracellular loops. The extracellular loops create a ligand specific pocket which binds to neurotransmitters or hormones. The intracellular loops holds onto the G-protein.
Assembly of Signaling Complexes
Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
G Protein-coupled Receptors
G Protein-Coupled Receptors or GPCRs are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to sensory stimuli such as light, odors, hormones, cytokines, or neurotransmitters.
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...
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...
G Protein-coupled Receptors
G Protein-Coupled Receptors or GPCRs are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to sensory stimuli such as light, odors, hormones, cytokines, or neurotransmitters.
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...
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...


