通过Saccharomyces cerevisiae中TDH3的直接调节者介导的TDH3表达变化的活性补偿
Pétra Vande Zande1, Mohammad A Siddiq1,2, Andrea Hodgins-Davis2
1Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan, United States of America.
基因网络通过基因对比补偿来保持稳定. 酵母中TDH3损失的活性补偿包括通过共享的调节器对TDH2进行上调,这表明具有更广泛的平稳反应.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 系统生物学 系统生物学
背景情况:
- 遗传网络表现出对突变的强度.
- 具有重叠功能的基因对应物通过补偿为这种强度做出了贡献.
- 主动补偿机制与被动补偿机制不同,涉及基因表达或活性的变化,但人们对其理解较少.
研究的目的:
- 研究Saccharomyces cerevisiae基因TDH3.3丢失的活性补偿机制.
- 了解其对应物TDH2在这种补偿过程中的作用.
- 探索转录调节器在活性补偿中的参与.
主要方法:
- 研究了Saccharomyces cerevisiae基因TDH3及其同类基因TDH2和TDH1.
- 分析了对TDH3降低的反应中TDH2的剂量依赖上调.
- 研究了共享的转录调节器Gcr1p和Rap1p的作用.
主要成果:
- 当TDH3的表达减少时,TDH2以剂量依赖的方式上调.
- 这种上调要求共享的转录调节器Gcr1p和Rap1p.
- 一个更遥远的相关类型,TDH1,显示了调节的改变.
- 其他由Gcr1p和Rap1p调节的糖溶性基因表现出类似的表达变化.
结论:
- 通过TDH2对TDH3损失的活性补偿是由共享的转录调节器Gcr1p和Rap1p调节的.
- 这种补偿是涉及多个甘油性基因的更大家庭静止反应的一部分.
- 这些发现揭示了遗传网络中活跃补偿的理解不足的机制.
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