酵母菌中基聚结合蛋白复合物的微管子运动活性
A A Hyman1, K Middleton, M Centola
1Department of Pharmacology, University of California, San Francisco 94143.
Nature
|October 8, 1992
概括
在细胞分裂过程中,CBF3蛋白质复合体直接将中心粒DNA与微管连接起来. 这种复杂的功能作为一个电机,对于精确的染色体分离在线粒分裂至关重要.
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:
- 细胞分裂期间的染色体分离依赖于线粒状.
- 由蛋白质结合中心体DNA而形成的kinetochores,将染色体连接到螺旋微管中.
- 发芽酵母中间体的CDEIII区域对于染色体分离至关重要.
研究的目的:
- 为了研究CBF3蛋白质复合物的体外功能.
- 为了确定中间体在线粒分裂过程中如何附着于微管.
主要方法:
- 亲密性染色学来分离CBF3蛋白质复合体.
- 在体外测试以评估动脉管功能和微管相互作用.
主要成果:
- 该CBF3复合体特别与CDEIII DNA序列结合.
- 在实验室中,CBF3证明了将DNA与微管结合的能力.
- 鉴定出CBF3复合体包含一个以微管子为基础的负端导向电机.
结论:
- 基于微管的电机可能是线粒分裂过程中染色体和微管之间的基本联系.
- CBF3复合体通过其运动活动在调解染色体-微管附着中发挥着关键作用.
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