USP46双双酶复合体通过稳定Arrow/LRP6来增加Wingless/Wnt的信号强度
Zachary T Spencer1, Victoria H Ng2, Hassina Benchabane1
1Department of Molecular and Systems Biology and the Dartmouth Cancer Center, Geisel School of Medicine, Dartmouth College, Hanover, NH, 03755, USA.
Nature communications
|October 5, 2023
概括
一个双双酸酶复合体稳定了Wnt受体Arrow/LRP6,控制了信号强度. 这种机制对于 Wingless/Wnt 途径在发育和预防癌症中的调节至关重要.
科学领域:
- 发展生物学 发展生物学
- 分子生物学分子生物学
- 细胞信号传递 细胞信号传递
背景情况:
- 丰富的Wnt受体对动物发育和预防瘤发生至关重要.
- 调节Wnt受体稳定性的机制尚未完全理解.
研究的目的:
- 为了研究 Usp46-Uaf1-Wdr20 deubiquitylase 综合体在稳定 Wingless/Wnt 受体 Arrow/LRP6.6 的作用.
- 阐明这个复合体如何控制Wnt信号强度及其对发育过程的影响.
主要方法:
- 利用Drosophila作为一个模型生物.
- 研究了USP46复合物的活性对Arrow无处不在和蛋白质水平的影响.
- 评估了对Wingless信号通路组件的影响,包括Armadillo/β-catenin和目标基因激活.
主要成果:
- Usp46-Uaf1-Wdr20复合体通过减少其无处不在和周转来稳定Arrow/LRP6.
- 增加细胞表面箭头水平提高对无翼形态原体的敏感性,放大信号响应.
- Usp46的非激活会使Arrow不稳定,减少Armadillo/β-catenin的积累,并损害无翼目标基因的激活.
结论:
- Usp46-Uaf1-Wdr20双化酶复合体是Wnt/Wingless受体稳定的一个进化保守调节器.
- 这种机制精确地控制了Wnt在形态基因梯度上的信号强度,这对于发育模式和组织平衡至关重要.
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