Pygo-F773W突变揭示了Drosophila中超越Wnt信号的新功能
Youfeng Li1, Zhigang Jiang1, Yue Xu1
1The Laboratory of Heart Development Research, College of Life Science, Hunan Normal University, Changsha 410081, China.
International journal of molecular sciences
|June 19, 2024
概括
这是一种Pygopus (Pygo) 蛋白质.
科学领域:
- * 分子和发育生物学
- *遗传学和表观遗传学
背景情况:
- * Pygopus (Pygo) 是无翼 (Wg) /Wnt信号通路的核联合激活器.
- * 皮戈蛋白质具有N端同源 (NHD) 和C端植物同源域 (PHD).
- * PHD 域与氨酸4 (H3K4me2 / 3) 中的三甲基化组素 H3 结合,但其在 Wnt 信号传递中的作用仍在争论中.
研究的目的:
- * 为了研究Pygo在Drosophila melanogaster*中的素结合能力的功能意义.
- * 创建和分析一个具有特定突变 (F773W) 影响基因素结合的 *Drosophila* 模型.
- *确定Pygo在Wnt信号传输中的已知功能之外的更广泛的角色.
主要方法:
- *使用CRISPR/Cas9基因编辑引入Pygo-F773W点突变.
- *产生一个可行的同卵性*Pygo*突变的*Drosophila*系.
- *RNA测序 (RNA-seq) 和成年突变的集群分析.
- *评估胚胎发育期间的H3K9乙化水平.
主要成果:
- *同胞性*Pygo*突变体在繁殖,运动,心脏功能和寿命方面表现出异常.
- *RNA-seq揭示了免疫,新陈代谢和翻译后修饰途径的显著变化,而不是Wnt信号.
- * 在突变菌株的胚胎阶段观察到H3K9乙化下降.
结论:
- *比以前理解的,Pygo在染色质重塑中起着更广泛的作用.
- *Pygo的质子结合影响了除了Wnt信号之外的各种生物过程.
- * 这项研究强调了Pygo通过表观遗传机制参与调节基因表达.
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