生物矿物化通过液-液相分离控制的高电荷蛋白质
Barbara P Klepka1, Agnieszka Michaś1, Tomasz Wojciechowski2
1Laboratory of Biological Physics, Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, Warsaw, PL-02668, Poland.
Small (Weinheim an der Bergstrasse, Germany)
|September 24, 2025
概括
富含酸的蛋白质通过液-液相分离 (LLPS) 驱动碳酸生物矿化,形成控制晶体形成的蛋白质-凝缩物 (LPCC). 这揭示了生物矿产开发的新机制.
科学领域:
- 生物矿物化 生物矿物化
- 材料科学 材料科学 材料科学
- 生物化学 生物化学
背景情况:
- 生物矿物化的分子机制尚未完全理解.
- 非经典的结晶路径表明过渡性液相被聚合物稳定.
- 缺乏生物矿物化过程中含有蛋白质的液相的直接证据.
研究的目的:
- 证明富含酸的蛋白质通过液态液相分离 (LLPS) 调节碳酸核和生长.
- 调查蛋白质凝析物 (LPCC) 作为结晶前体的作用.
- 探索蛋白质电荷和溶液拥挤对矿物质形成的影响.
主要方法:
- 使用了AGARP,一种来自珊瑚 (Acropora millepora) 的富含酸的蛋白质,作为模型系统.
- 在生理学上相关,拥挤的条件下研究了LLPS.
- 在存在或缺少AGARP的情况下分析了碳酸核和生长.
主要成果:
- AGARP诱导LLPS,形成液态蛋白质凝析物 (LPCC),作为结晶前体.
- 暴露在碳酸盐离子中的LPCC产生了平滑边缘的碳酸形态.
- 在低拥挤条件下,AGARP导致无形碳酸 (ACC) 的形成.
- AGARP本质上仍然是无序的,这表明电荷介导相互作用是关键的.
结论:
- LPCCs是矿化前的生物相关中间体.
- LLPS提供了一个新的分子框架,弥合相位分离和生物矿物化.
- 蛋白质相位行为可以为生物灵感材料设计提供信息.
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