在S232的14-3-3θ酸化减少了其相互作用体,并调节了轴突贩运
F Sanders Pair1, Rudradip Pattanayak1, James A Mobley2
1Center for Neurodegeneration and Experimental Therapeutics, Department of Neurology, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
14-3-3θ酸化影响神经元蛋白相互作用和轴突运输. 异常酸化,在帕金森病中见到.
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:
- 14-3-3蛋白通过蛋白与蛋白相互作用 (PPI) 调节关键的神经元功能.
- 14-3-3θ异型在帕金森病 (PD) 和患有勒维体 (DLB) 的痴呆症模型中显示出保护作用.
- 在人类PD和DLB大脑中观察到S232的14-3-3θ酸化升高.
研究的目的:
- 研究14-3-3θ酸化对大脑PPI的影响.
- 阐明S232酸化在调节轴突运输和神经元功能中的作用.
主要方法:
- 使用了S232基突变的敲进小鼠模型.
- 进行了亲和力净化-质谱测试,以确定结合蛋白.
- 对轴突中的酸性囊泡进行实时成像,以评估运输动态.
主要成果:
- 确定了参与神经元形态发生和微管子动态的蛋白质,它们与14-3-3θ结合.
- 与S232A小鼠相比,在S232D小鼠中观察到蛋白质与14-3-3θ结合的显著减少.
- 在S232A和S232D神经元中发现了轴突囊泡净速度的降低,囊泡暂停和细分速度有明显的缺陷.
结论:
- 在S232的14-3-3θ酸化调节了酸性囊泡的轴突运输.
- 由于异常酸化导致的轴突运输中断可能导致PD和DLB中蛋白质聚合物的清除受损.
- 这些发现突出了14-3-3θ酸化作为神经退行性疾病的潜在治疗点.
更多相关视频
10:38Author Spotlight: Understanding the Impact of Pathological Proteins on Axonal Transport in Neurodegenerative Diseases
Published on: December 22, 2023
12:47Nuclear Magnetic Resonance Spectroscopy for the Identification of Multiple Phosphorylations of Intrinsically Disordered Proteins
Published on: December 27, 2016
相关概念视频
Assembly of Complex Microtubule Structures
Generation of Straight or Branched Actin Filaments
Arp2/3 Complex
Arp2/3 complex is a seven-subunit complex consisting of two proteins similar to actin- Arp2 and Arp3, and five other subunits that help keep Arp2 and Arp3 inactive. When required, the complex is...
Disassembly of Intermediate Filaments
Keratin proteins, found at the cell periphery near cell junctions, undergo a cycle of assembly and disassembly. In Type...
Phosphorylation
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
Tail-anchoring of Proteins in the ER Membrane
Assembly of Signaling Complexes
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
