通过聚合物对手和突变调节的液体-液体相分离后的细胞蛋白形态转移
Yangyi Liu1,2, Marcus D Tuttle1, Mikhail A Kostylev2
1Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511, United States.
Journal of the American Chemical Society
|September 26, 2024
概括
蛋白 (PrPC) 的液态相分离 (LLPS) 需要一个成熟过程. 这种由突变和PSCMA加速的形状变化可能会导致神经退化.
科学领域:
- 生物化学
- 神经科学
- 分子生物学
背景情况:
- 本质上无序的蛋白质的液态分离与神经退行性疾病有关.
- 通过LLPS导致神经退行的确切机制尚不清楚.
- 细胞蛋白 (PrPC) 与神经退行性疾病有关.
研究的目的:
- 在LLPS之后调查PrPC的成熟过程
- 在PrPCLLPS和成熟中探索突变和多4-硫酸-同酸 (PSCMA) 的调节作用.
- 阐明PrPC在神经退行后的形状变化的潜在作用.
主要方法:
- 使用PSCMA诱导PrPC液相分离.
- 核磁共振 (NMR) 光谱检测构造状态.
- 分析PrPC成熟动力学和分子动力学.
主要成果:
- PSCMA会诱导PrPC的回流LLPS,使其和度 (Csat) 降低100倍.
- PrPC经历成熟过程,过渡到具有受限制分子运动的更固态状态,无论诱导方法如何.
- 与子疾病相关的E200K突变加速了PrPC的成熟.
- 由PSCMA诱导的LLPS稳定了中间的形状状态,而最终的β-sheet丰富状态在各种条件中是一致的.
结论:
- 在LLPS之后,PrPC经历了形态成熟,过渡到一个更为刚性的状态.
- 这种LLPS后的形状变化和改变的动态代表了LLPS诱导的神经退行症的潜在机制.
- PSCMA对PrPC和LLPS的成熟进行调节,为和相关疾病的治疗策略提供了洞察力.
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