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Updated: May 6, 2026
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Reconstitution Of β-catenin Degradation In Xenopus Egg Extract
Published on: June 18, 2014
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在Xenopus胚胎中,XTcf-3转录因子调解β-catenin诱导的轴形成
M Molenaar1, M van de Wetering, M Oosterwegel
1Department of Immunology University Hospital, Utrecht The Netherlands.
Cell
|August 9, 1996
概括
鸟TCF-3 (XTcf-3) 与β-catenin合作,将其转移到核中以激活基因转录. 这种XTcf-3和β-catenin的相互作用对于胚胎轴的规范至关重要.
科学领域:
- 发展生物学 发展生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- XTcf-3是哺乳动物Tcf-1和Lef-1转录因子的Xenopus同类物.
- 母体表达的XTcf-3与β-catenin相互作用.
研究的目的:
- 研究XTcf-3在β-catenin介导信号传递和胚胎发育中的作用.
- 阐明XTcf-3在转录激活中的机制.
主要方法:
- 在Xenopus胚胎中微注射XTcf-3mRNA和主导阴性突变物.
- 贝塔-丁相互作用测试.
- 暂时的记者基因测试用于转录激活.
- 对胚胎轴规格的分析.
主要成果:
- XTcf-3通过其N端结合于β-catenin.通过其N端结合于β-catenin.
- 在XTcf-3-β-catenin复合体诱导核转移β-catenin.
- 这个复合体激活转录,而XTcf-3单独是不活跃的.
- 一种缺少N端的主导负XTcf-3突变体抑制了β-catenin诱导的轴重复和内源轴形成.
结论:
- 在Xenopus中,β-catenin信号传递涉及与XTcf-3的复杂形成.
- 核转位的XTcf-3-β-catenin复合体激活特定的目标基因.
- 通过β-catenin通路,XTcf-3在胚胎轴的规范中发挥着关键作用.
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