通过Drosophila中的Frizzled受体进行信号特异性
M Boutros1, J Mihaly, T Bouwmeester
1European Molecular Biology Laboratory, Developmental Biology Programme, Meyerhofstrasse 1, 69117 Heidelberg, Germany.
Science (New York, N.Y.)
|June 10, 2000
概括
在发育过程中,Wnt-Frizzled (Fz) 信号通路至关重要. 的2 (Fz2) 和的 (Fz) 受体优先激活不同的Wnt信号级联,影响细胞组织和发育.
科学领域:
- 分子生物学分子生物学
- 发展生物学 发展生物学
- 细胞信号传递 细胞信号传递
背景情况:
- Wnt-Frizzled (Fz) 信号通路对于脊椎动物和无脊椎动物的发育和稳态是必不可少的.
- 的受体通过β-catenin依赖和独立的途径调解Wnt信号.
- 在Drosophila中,Frizzled (Fz) 和Frizzled 2 (Fz2) 是冗余的Wnt受体,Fz也组织了上皮质平面极化.
研究的目的:
- 研究Frizzled 2 (Fz2) 和Frizzled (Fz) 受体的显著信号效率.
- 为了确定密切相关的受体的内在差异如何有助于信号特异性.
- 阐明细胞质序列在激活特定Wnt信号级联中的作用.
主要方法:
- 对Frizzled 2 (Fz2) 和Frizzled (Fz) 受体信号进行比较分析.
- 研究β-catenin依赖和平面细胞极性通路的研究.
- 使用Drosophila模型进行的功能研究.
主要成果:
- Frizzled 2 (Fz2) 和 Frizzled (Fz) 受体的细胞质序列优先激活分别是β-catenin和平面极性级联.
- 无论是Fz2还是Fz受体都能激活这两种途径,但效率不同.
- 在密切相关的Frizzled受体之间展示了差异性的信号效率.
结论:
- 密切相关的Frizzled受体之间信号效率的内在差异是产生信号特异性的关键机制 in vivo.
- 这一发现为开发过程中Wnt信号的调节提供了洞察力.
- 突出了Frizzled受体在指导细胞过程中的细微作用.
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