含有瓦洛辛的蛋白质通过其ATPase活性在体外对抗FUS凝聚物的ATP驱动溶解
Hitomi Kimura1,2, Shin-Ichi Tate1,2,3,4,5, Kyota Yasuda1,2,3
1Graduate School of Integrated Sciences for Life, Hiroshima University, Japan.
FEBS letters
|March 17, 2026
概括
含有瓦洛辛蛋白 (VCP) 的ATPase活性防止高ATP下FUS凝结物的溶解,保持这些结构在神经退行性疾病中至关重要,如ALS. 这揭示了酶对相位分离的控制.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 神经科学是一个神经科学.
背景情况:
- 化在肉瘤 (FUS) 中的蛋白质形成了与肌缩侧硬化症 (ALS) 相关的相隔凝结物.
- 高度的ATP通常通过热效应溶解FUS凝结物,但凝结物仍在细胞中存在.
- 这种持久性表明,积极的监管机制参与控制凝结物的稳定性.
研究的目的:
- 研究AAA+ ATPase含瓦洛蛋白 (VCP) 在调节FUS凝结物的稳定性方面的作用.
- 为了确定VCP的ATPase活性是否会抵消FUS凝聚物的ATP驱动溶解.
- 探索VCP的酶控制对神经退行症中液体-液体相分离的影响.
主要方法:
- 利用重新组建的系统来研究FUS凝结物.
- 在高ATP条件下评估VCP对野生类型和P525L突变FUS凝结物的影响.
- 研究了VCP的催化ATPase活性的要求,并使用了D2特定抑制剂ML240.0.
主要成果:
- 含有瓦洛辛的蛋白质 (VCP) 抵消了FUS凝聚物的ATP驱动溶解.
- 在高ATP下,VCP保留了野生类型和ALS相关的P525L FUS凝聚物.
- 通过VCP的保护取决于其催化ATPase活性,而不是凝析分离,并被ML240.0阻止.
结论:
- 在高ATP条件下,VCP的ATPase活性直接维持FUS凝结物.
- 这项研究提供了生物化学证据,证明了对液体-液体相分离的酶控制.
- 研究结果表明,这可能是调节相位分离的潜在通用机制,对神经退行性疾病有影响.
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