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自发的液滴到凝的转换与核酸复合的素聚
Shouhei Nomura1, Ayano Miyasaka1, Atsushi Maruyama1
1Department of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8501, Japan.
ACS biomaterials science & engineering
|February 26, 2024
概括
细胞液滴可以转化为致病凝. 复杂的核酸与多聚合物 ((l-ornithine-co-l-citrulline) 共聚合物显示了这种过渡,为疾病机制提供了洞察力.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 聚合物科学 聚合物科学
背景情况:
- 细胞蛋白和核酸通过液-液相分离形成液滴.
- 突变的蛋白质可以改变这些滴到固体或凝状态,可能导致神经退行性疾病.
- 这些滴滴中驱动液体到固体/凝过渡的确切机制尚不清楚.
研究的目的:
- 为了研究核酸对聚-l-ornithine-co-l-citrulline (PLOC) 共聚物的相态行为的影响.
- 阐明静电和键相互作用在相变中的作用.
- 在细胞过程的背景下,了解液滴到凝过渡的机制.
主要方法:
- 使用的聚-l-ornithine-co-l-citrulline) (PLOC) 共聚物显示上临界溶液温度行为.
- 当与核酸 (polyC,polyU,mRNA) 复合时,检查了PLOC的相变.
- 分析了温度和核基化学结构对相分离和滴滴形成/溶解的影响.
主要成果:
- 在低温下,PLOC形成了含有核酸的液滴,在相隔温度以上溶解.
- 阶段分离温度取决于核基结构,表明静电和结合的影响.
- 液滴通过自发核酸释放转化为凝状沉物,转化速率取决于相互作用强度.
结论:
- 核酸复合与PLOC共聚物影响相分离行为.
- 静电和键相互作用是这些系统中相变的关键决定因素.
- 这项研究为细胞液滴的致病性转变背后的机制提供了关键的见解.
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