与肌缩性侧面硬化症相关的聚合物隔离了活性蛋白结合蛋白profilin 2 2
Sabrina Kubinski1,2, Luisa Claus1, Tobias Schüning1,2
1Hannover Medical School, Institute of Neuroanatomy and Cell Biology, Carl-Neuberg-Straße 1, 30625 Hannover, Germany.
素蛋白质被隔离在与肌缩侧面硬化症 (ALS) 相关的聚合物中,破坏了actin细胞骨动力学. 这表明,除了罕见的遗传突变之外,在ALS病变发生过程中,profilins的作用更广泛.
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
- 生物化学 生物化学
背景情况:
- 肌缩侧面硬化症 (ALS) 涉及运动神经元退化.
- 家族性ALS (fALS) 与C9orf72,FUS,SOD1和TARDBP中的突变有关.
- 在ALS蛋白质中的内在无序区域 (IDR) 驱动液体-液体相分离 (LLPS) 和应力颗粒 (SG) 形成.
研究的目的:
- 为了研究该假设,profilin异型被隔离在ALS相关的蛋白质聚合物.
- 为了确定这种分离是否导致actin细胞骨失调.
- 探讨在ALS病理机制中蛋白质的作用.
主要方法:
- 细胞模型的ALS.
- 免疫光显微镜观察蛋白质定位.
- 行为动态的分析.
主要成果:
- 个人素-2 (PFN2) 显示出比个人素-1 (PFN1) 更大的局部化到SG.
- FUS和C9orf72聚合物隔离了PFN2,但没有PFN1.
- 在C9orf72聚合物中,PFN2和G-actin被明显隔离,导致失调的actin动态.
结论:
- 林异型蛋白,特别是PFN2,通过蛋白质聚合物中的分离,与ALS的发病有关.
- 与ALS相关的蛋白质聚合物可以通过蛋白质分离来调节actin动态.
- 个人蛋白可能在ALS中发挥着比以前罕见突变更重要的作用.
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