保存的KMN网络构成了基内托科尔的核心微管结合部位
Iain M Cheeseman1, Joshua S Chappie, Elizabeth M Wilson-Kubalek
1Ludwig Institute for Cancer Research, Department of Cellular and Molecular Medicine (UCSD), CMM-East, Room 3052, La Jolla, CA 92093, USA. icheeseman@ucsd.edu
Cell
|November 30, 2006
概括
该KMN网络对于kinetochore-microtubule相互作用至关重要. 这个网络包括KNL-1和Ndc80复合体,形成了核心微管结合点,对染色体分离至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 基因 - 微管相互作用对于细胞分裂期间精确的染色体分离至关重要.
- 虽然几种动态体成分影响微管子动态,但没有一个被确定为直接相互作用的重要组成部分.
- 众所周知,KNL-1/Mis12复合体/Ndc80复合体 (KMN) 网络对于这些体内相互作用至关重要.
研究的目的:
- 为了研究KMN网络在kinetochore-microtubule相互作用中的作用.
- 在KMN网络中识别不同的微管结合活动.
- 了解完整的KMN网络形成和调节性酸化如何影响微管结合.
主要方法:
- 生物化学分析以确定和描述微管结合活动.
- 分析KMN网络中的子单位贡献.
- 在体外研究 Aurora B 酸化对 Ndc80 复合物的作用.
主要成果:
- 在KMN网络中发现了两个不同的微管结合活动:一个在Ndc80复合体 (Ndc80/Nuf2子单元) 中,另一个在KNL-1.
- 整个KMN网络,包括Mis12复合体和Spc24/Spc25子单元,协同增强了微管结合亲和力.
- 极光B酸化降低了NDC80复合体的体外微管结合亲和力.
结论:
- 保存的KMN网络作为核心微管结合部位的功能.
- 这个网络集成了多个组件,以实现强大的动脉管-微管相互作用.
- 通过酸化进行调节,例如由Aurora B进行调节,为适当的染色体分离微调这些相互作用.
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