序列特异性相互作用决定了蛋白质凝聚物的粘性弹性和衰老动态
Ibraheem Alshareedah1, Wade M Borcherds2, Samuel R Cohen3
1Department of Physics, The State University of New York at Buffalo, Buffalo, NY 14260, USA.
Nature physics
|October 28, 2024
概括
生物分子凝聚物,由hNRNP A1蛋白形成的粘性弹性材料,随着时间的推移,从粘性液体过渡到弹性固体. 序列决定了这种衰老过程,由蛋白相互作用控制.
科学领域:
- 生物物理学的生物物理.
- 分子生物学分子生物学
- 生物化学 生化学
背景情况:
- 生物分子凝结物表现出粘弹性特性.
- hnRNP A1 的类低复杂性域 (LCD) 形成了这种凝结物.
- 了解序列编码和年龄依赖的粘性弹性至关重要.
研究的目的:
- 调查凝结物粘性弹性的序列决定因素.
- 在 hnRNP A1 LCD 凝聚物中描述年龄依赖的过渡.
- 探索序列语法在控制冷凝相位行为中的作用.
主要方法:
- 从 hnRNP A1 LCD 和其变体中形成和表征凝结物.
- 风湿学测量以确定粘弹性模块.
- 应用Rouse-Zimm聚合物动态模型的应用.
- 对特定序列相互作用和衰老动态的分析.
主要成果:
- 凝结体是转移稳定的麦克斯韦流体,在衰老时转变为凯尔文-沃伊格特固体.
- 芳香的粘贴间相互作用决定了序列特定的粘弹性特性.
- 衰老是依赖序列的,由粘性相的变态稳定性减弱所驱动.
- 障碍到秩序的过渡和β片的形成伴随着衰老.
结论:
- 像子一样的液晶显示器中的序列语法控制了凝结物转移稳定性.
- 进化的序列防止在功能时间尺度上从流体转化为固体.
- 凝析物衰老的动态是由序列编码的相互作用和相位稳定性决定的.
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