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Updated: Sep 16, 2025

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过渡的多 (ADP-Ribose) 触发了FUS凝结歇斯底里通过一种类似于的机制
Hongrui Liu1,2, Yuxuan Cai1, Leilei Shi3
1Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA.
bioRxiv : the preprint server for biology
|July 9, 2025
概括
聚ADP-ribose (PAR) 结合诱导了Fused in Sarcoma (FUS) 蛋白质的形状变化,使得细胞内持续凝结. 这种机制解释了FUS凝结物如何在初始PAR信号发送后持续存在,模仿像子一样的行为.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生物化学
- 分子生物学分子生物学
背景情况:
- 歇斯底里斯,或过渡性刺激的记忆,在细胞信号传递和细胞内组织中观察到.
- DNA 修复焦点是由短命的多分子ADP-核糖酶 (PAR) 启动的生物分子凝聚物.
- 像Fused in Sarcoma (FUS) 一样具有类域 (PrLD) 的蛋白质被 PAR 招募,以形成在 PAR 降解后持续存在的凝结物.
研究的目的:
- 阐明FUS从PAR依赖到PAR独立的冷凝过渡的机制.
- 了解细胞内组织如何表现出hysteresis.
主要方法:
- 研究了FUS在PAR结合后的形状变化.
- 描述了FUS的C端氨酸丰富区域和N端PrLD在凝结中的作用.
- 利用生物物理技术研究蛋白质-核酸相互作用和凝结物稳定性.
主要成果:
- PAR结合会诱导FUS中的构造转换,暴露其N终端PrLD.
- 这种形状开口通过分子间相互作用促进了持续的,独立于PAR的凝结.
- FUS经历了一个受调节的,核化的 conformational 转换,类似于子形成.
结论:
- 核酸诱导的形态记忆的范式是细胞内组织中的hysteresis的基础.
- 这种机制对于理解细胞过程和疾病中的FUS凝结力学至关重要.
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