在Caenorhabditis中肠道特征的进化变化以GATA因子ELT-3为中心,在发育系统漂移的一个例子中
Gina Broitman-Maduro1, Morris F Maduro1
1Department of Molecular, Cell, and Systems Biology, University of California-Riverside, Riverside, CA 92521, USA.
Journal of developmental biology
|July 25, 2023
概括
在C. elegans中,肠道特异网络是从一个更简单的祖先途径演变而来,涉及ELT-3和ELT-2. 这种复杂的进化,称为发育系统漂移,发生在没有改变肠道的情况下.
科学领域:
- 发展生物学 发展生物学
- 进化发育生物学 进化发育生物学
- 遗传学 是一个遗传学.
背景情况:
- 细胞类型特定的基因调节网络控制胚胎发育.
- 在Caenorhabditis elegans中,肠道特异网络涉及一连串的GATA因子:MED-1,2 → END-1,3 → ELT-2,7.
- 在更远的相关物种中缺少关键调节剂 (MED,END,ELT-7).
研究的目的:
- 研究缺乏关键C. elegans调节者的物种如何发生肠道特异.
- 阐明肠道特异基因调控网络的演变.
- 提出一个模型,从一个更简单的祖先路径形成复杂的C. elegans网络.
主要方法:
- 对不同物种的基因调节网络进行比较分析.
- 审查关于线虫肠道特异性的现有文献.
- 建模基因调节网络的进化途径.
主要成果:
- 一个更简单的肠道规范网络 (ELT-3 → ELT-2) 在更遥远的物种中运行.
- 在C. elegans中,ELT-3通常不参与内皮发育,但在相关物种中起着关键作用.
- 更简单的ELT-3 → ELT-2网络被提出为一个祖先路径.
结论:
- 在C. elegans中,复杂的肠道规范网络很可能是从一个更简单的祖先路径进化而来的.
- 基因调节网络的进化变化可以发生而不会改变最终的表型 (发育系统漂移).
- 在肠道规范中ELT-3的作用突显了发育基因网络的可塑性.
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