暂停的Pol II协调了Drosophila胚胎中的组织形态发生
Mounia Lagha1, Jacques P Bothma, Emilia Esposito
1Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA.
Cell
|May 28, 2013
概括
暂停RNA聚合酶 (Pol II) 确保组织发育的协调基因表达. 这项研究表明,Pol II同步对于胚胎形态发生过程中精确的细胞运动至关重要.
科学领域:
- 发育生物学是发展生物学.
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 暂停RNA聚合酶 (Pol II) 在早期发育中很常见,但其功能仍然不清楚.
- 协调基因表达对于复杂的生物过程至关重要.
研究的目的:
- 研究暂停RNA聚合酶 (Pol II) 在胚胎发育期间实现转录同步中的作用.
- 确定Pol II对基因激活的时间控制是否对于协调细胞行为,如形态生成至关重要.
主要方法:
- 操纵牛基因的促销者强度,该基因调节了Drosophila胚胎中的中皮膜发育.
- 分析牛基因激活的时间及其对中皮细胞发育变异性的影响.
- 使用发育基因网络的计算建模来理解基因激活时间的重要性.
主要成果:
- 暂停的Pol II水平的光谱决定了跨组织基因表达的"同步时间".
- 改变牛促销器暂停导致随机基因激活,并增加了中皮膜发育的变异性.
- 计算模型证实,精确的基因激活时间对于强大的发育模式至关重要.
结论:
- 暂停RNA聚合酶 (Pol II) 和由此产生的转录同步对于在形态发生过程中协调细胞行为至关重要.
- 基因激活的时间由Pol II暂停调节,在确保发育强度和精度方面起着至关重要的作用.
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