对于克拉特林介导的内细胞分裂的配体被差异性地分类为早期内基因组的不同种群
Melike Lakadamyali1, Michael J Rust, Xiaowei Zhuang
1Howard Hughes Medical Institute, Harvard University, Cambridge, MA 02138, USA.
Cell
|March 15, 2006
概括
细胞对内细胞材料的分类发生在达到早期内体 (EEs) 之前. 一种新的机制使用不同的EE种群和微管体依赖的运动性来分离降解和回收货物.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 细胞内核研究研究 细胞内核研究
背景情况:
- 正确的细胞功能依赖于内细胞连接体和受体的精确分类.
- 早期内分泌体 (EEs) 传统上被视为降解与回收的首要分类中心.
- 控制内细胞通路内货物分类的精确机制仍然是一个活跃的研究领域.
研究的目的:
- 为了研究内体分类的实时动态.
- 为了确定在货物进入早期内分泌体之前发生的新型分类机制.
- 描述早期内体内的不同种群及其载荷选择性.
主要方法:
- 实时对个体内基因组和带颗粒的活细胞成像.
- 在微管上监测内体细胞的运动性.
- 追踪货物 (降解与回收联体) 定位和成熟率.
主要成果:
- 早期内分体 (EEs) 包含两个不同的群体:动态和静态.
- 动态EEs具有高度的机动性,迅速成熟,并优先接受降解货物.
- 静态EEs的成熟缓慢,不太灵活,并且积累了转移蛋白等循环配体.
- 预EE分类始于克拉特林涂层囊泡,涉及微管体依赖的运动性和内细胞适配器.
结论:
- 存在一个早期前内组分类机制,在货物进入EE之前.
- 不同的EE群体 (动态与静态) 介导差异性货物分类.
- 微管体依赖的运动性和内细胞适配器在这种新的分类过程中起着至关重要的作用.
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