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酵母Cbk1和Mob2激活女儿特异性遗传程序,诱导不对称的细胞命运
A Colman-Lerner1, T E Chin, R Brent
1The Molecular Sciences Institute, 2168 Shattuck Avenue, Berkeley, CA 94704, USA. colman-lerner@molsci.org
Cell
|December 19, 2001
概括
在酵母中,Cbk1激酶和Mob2蛋白通过激活Ace2转录因子来控制独特的母子细胞命运. 这确保子细胞激活特定的基因,包括用于细胞分离的基因.
科学领域:
- 细胞生物学 细胞生物学
- 分子遗传学 分子遗传学
- 酵母生物学的酵母生物.
背景情况:
- 酵母细胞表现出不对称的分裂,导致不同的母细胞和子细胞命运.
- 了解控制这种不对称性的分子机制对于细胞生物学至关重要.
研究的目的:
- 研究Cbk1激酶和Mob2在Saccharomyces cerevisiae中调节子基因特异性基因表达中的作用.
- 阐明诱导和控制女儿特异性遗传程序的机制.
主要方法:
- 利用基因操纵研究Cbk1/Mob2通路和Ace2转录因子.
- 分析了酵母细胞中的基因表达模式和蛋白质定位.
- 研究了Ace2错位化的功能后果.
主要成果:
- Cbk1激酶和Mob2蛋白通过控制Ace2转录因子的活动和局部化来诱导女儿特异性遗传程序.
- 活跃的Ace2定位在子核中,驱动子基因特异性基因表达.
- 母核中活性Ace2的异胎表达激活了女儿特异性基因.
- 在测试条件下确定了八个女儿特异性基因,另外两个特定于和文化的基因.
- 一些女儿特异性基因产物参与细胞壁降解,促进细胞分离.
结论:
- Cbk1/Mob2通路对于在酵母中建立女儿特异性基因表达程序至关重要.
- 将Ace2转录因子定位到子核是一个关键的调节步骤.
- 这些发现定义了女儿特异性基因表达程序及其控制机制,有助于理解细胞命运决定和细胞分离.
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