组合转录电路的演变:在酵母菌中的案例研究
Annie E Tsong1, Mathew G Miller, Ryan M Raisner
1Department of Biochemistry & Biophysics, University of California, San Francisco, San Francisco, CA 94143, USA.
Cell
|November 19, 2003
概括
基因调节的进化变化推动了生物的复杂性. 比较Candida albicans和Saccharomyces cerevisiae揭示了不同的交配类型调节电路,突出了尽管进化路径不同,但仍然保留了输出.
科学领域:
- 进化生物学是进化的生物学.
- 分子生物学分子生物学
- 菌类学 菌类学是指菌类学.
背景情况:
- 基因调节可塑性对于进化复杂性至关重要.
- 了解转录电路为进化分歧提供了洞察力.
- 坎迪达阿尔比坎斯和Saccharomyces cerevisiae在1亿至8亿年前分离.
研究的目的:
- 为了确定Candida albicans中调节交配类型的转录电路.
- 为了将这个电路与Saccharomyces cerevisiae的电路进行比较.
- 为了研究长时间基因调节的进化变化.
主要方法:
- 对转录性调节电路的比较分析.
- 确定关键调节基因及其修改.
- 基于酵母分歧的进化时间尺度评估.
主要成果:
- 在C. albicans和S. cerevisiae之间观察到交配类型调节电路的显著差异.
- 一个对交配类型的积极调节器在S. cerevisiae中丢失,但在C. albicans中保留.
- 在S. cerevisiae中的电路修改补偿了损失,保持了电路输出.
- 在C. albicans中,一个独特的调节层可能反映了对哺乳动物宿主环境的适应.
结论:
- 进化压力导致基因调节网络的显著可塑性.
- 保护电路输出可以通过不同的监管机制来实现.
- 环境适应,如宿主-病原体相互作用,形成独特的监管层.
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