主要神经元中的代谢甘氨酸标记由无S的非天然糖启用 - 甘氨酸修饰
Jiayu Sun1,2, Zhimin Huang1,3, Yifei Du1,3
1College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
ACS chemical biology
|May 30, 2023
概括
代谢甘氨酸标记 (MGL) 现在与初级神经元培养相容. 新的非自然糖避免了细胞毒性,使得可视化和识别细胞表面化甘氨酸和神经元中的糖蛋白.
科学领域:
- 神经科学是一个神经科学.
- 葡萄糖生物学 葡萄糖生物学
- 生物化学 生物化学
背景情况:
- 代谢甘氨酸标记 (MGL) 对于分析初级神经元培养中的甘氨酸至关重要.
- 通常用于MGL的Per-O-乙化非天然糖在神经元中表现出细胞毒性.
- 这种细胞毒性与蛋白质氨酸蛋白的非酶性S-糖基修饰有关.
研究的目的:
- 为初级神经元培养建立非细胞毒性MGL方法.
- 为了研究per-O-乙化非天然糖的细胞毒性机制.
- 为了实现可视化和大规模识别神经元中的化甘氨酸和糖蛋白.
主要方法:
- 开发出没有S-葡萄糖修饰的非天然糖 (ManNAz,1,3-Pr2ManNAz,1,6-Pr2ManNAz).
- 将这些糖应用于MGL的初级神经元培养物.
- 利用质谱测量来大规模识别化N链糖蛋白和修饰部位.
主要成果:
- 为初级神经元建立了一个非细胞毒性MGL协议.
- 鉴定了受S-糖基修饰影响的特定生物功能,包括微管细胞骨架组织和轴突发生.
- 可视化了细胞表面的化甘氨酸,并探测了化动态.
- 在使用1,6-Pr2ManNAz. 345个糖蛋白上确定了505个化N-糖化位.
结论:
- 没有S-葡萄糖修饰的非自然糖可以在初级神经元中实现非细胞毒性MGL.
- 这一进步允许对神经元糖化酶的详细分析.
- 该研究确定了关键的葡萄糖蛋白和参与神经元发育和功能的糖化位点.
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