对于CENP-A加载和在中间体上脱乙烯化基因组的Mis16和Mis18是必要的
Takeshi Hayashi1, Yohta Fujita, Osamu Iwasaki
1Department of Gene Mechanisms, Graduate School of Biostudies, Kyoto University, Sakyo-ku, 606-8502, Japan.
Cell
|September 17, 2004
概括
裂变酵母 Mis15-18 蛋白质是中心分子组装的关键. Mis16和Mis18是CENP-A招募的关键上游因素,在人类细胞中保留了功能.
科学领域:
- 细胞生物学 细胞生物学
- 遗传学 是一个遗传学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 中心分子需要专门的染色质,包括CENP-A.
- 了解中间体蛋白招募对于细胞分裂至关重要.
研究的目的:
- 识别和描述新型裂变酵母中心蛋白质.
- 阐明这些蛋白质在CENP-A局部化和动态组装中的作用.
主要方法:
- 在裂变酵母中识别蛋白质.
- 中心蛋白突变体的遗传分析.
- 人类细胞中的RNAi敲击.
主要成果:
- 鉴定出了五种新蛋白质 (Mis14-18),涉及到中粒体功能.
- Mis14是独立于CENP-A招募的.
- 错误15,错误17,错误16和错误18对于CENP-A的招聘至关重要.
- Mis16和Mis18形成了一个复杂的上游的kinetochore组件.
- 人类CENP-A局部化需要Mis16同类物 (RbAp48/46).
结论:
- Mis16 和 Mis18 作为 CENP-A 动态芯组装的上游调节器.
- 在CENP-A局部化中Mis16的功能在进化过程中从酵母保存到人类.
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