在PCP蛋白移动性中,细胞周期依赖的转变消除并恢复在线粒分裂中的平面细胞极性
bioRxiv : the preprint server for biology
|January 16, 2026
概括
平面细胞极性 (PCP) 蛋白在线粒分裂过程中变得更加可移动,在移动和稳定状态之间过渡. 不对称性是通过细胞邻居相互作用恢复的,而不是囊泡传递,确保细胞分裂过程中强大的极性.
科学领域:
- 细胞生物学 细胞生物学
- 发育生物学 发展生物学
- 生物物理学的生物物理.
背景情况:
- 细胞极性对于组织发育和功能至关重要.
- 平面细胞极性 (PCP) 建立了整个组织的方向.
- 了解细胞分裂期间的蛋白质动力学是维持细胞极性的关键.
研究的目的:
- 为了研究PCP蛋白在线粒分裂和细胞运动过程中的动态行为.
- 阐明在细胞分裂过程中短暂损失后恢复PCP不对称性的机制.
- 了解细胞周期进展如何影响PCP蛋白的局部化和移动性.
主要方法:
- 活细胞成像以追踪PCP蛋白的动态.
- 在光漂白后的光恢复 (FRAP) 以量化蛋白质的移动性.
- 对PCP蛋白动态的Plk1-依赖调节的分析.
- 研究极性恢复的非细胞自主机制.
主要成果:
- PCP蛋白在以Plk1依赖的方式在线粒体进入时呈现出增加的横向移动性.
- 在线粒分裂过程中,PCP蛋白被内化到内细胞囊中.
- 细胞动力学中极性恢复通过侧向扩散和通过细胞-细胞粘附稳定,而不是两极化囊泡输送.
- 非细胞自主相互作用对于恢复PCP不对称性至关重要.
结论:
- 线粒体进入诱导了PCP蛋白的短暂,横向扩散状态.
- 细胞分裂涉及PCP蛋白移动性和局部化的动态重塑.
- 与邻近细胞的粘合相互作用在细胞动力学过程中恢复平面细胞极性方面发挥着关键作用.
- 线粒分裂中的横向扩散状态在细胞形状变化和重新排列期间为平面极性提供了强度.
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