相关实验视频
Updated: May 12, 2026

09:41
Reconstitution Of β-catenin Degradation In Xenopus Egg Extract
Published on: June 17, 2014
β-catenin 的 Wnt 稳定揭示了形态受体受体架构组件的原理
Sung-Eun Kim1, He Huang, Ming Zhao
1F. M. Kirby Center, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.
概括
通过酸化,Wnt信号控制了Axin蛋白的活性. 这项规定规定了Axin的要求.
科学领域:
- 细胞信号传递途径 细胞信号传递途径
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- Wnt信号传递对细胞过程至关重要,涉及通过LRP6受体稳定β-catenin.
- 素基架和糖原合成酶激酶-3 (GSK3) 是关键组成部分,但它们在信号传导中的确切作用尚不清楚.
研究的目的:
- 为了阐明Wnt信号调节Axin支架的机制.
- 研究酸化在控制Axin的支架功能和相互作用中的作用.
主要方法:
- 研究了Axin对Wnt信号的反应中的酸化状态.
- 研究了Axin,LRP6,β-catenin和GSK3.3之间的相互作用动态.
- 使用生物化学分析来评估Axin活性和脱化.
主要成果:
- 通过GSK3介导的酸化激活了Axin,促进了β-catenin的结合和LRP6的参与.
- 由Wnt诱导的LRP6-Axin复合体形成导致Axin被蛋白质酸酶-1.0去酸化.
- 脱酸化的Axin变得不活跃,减少其与β-catenin和LRP6.6的关联.
结论:
- Wnt信号通过一种依赖酸化的机制来控制Axin支架的功能.
- 这种调节开关控制β-catenin的稳定性和Wnt通路的激活.
- 研究结果揭示了对脚手架调节和形态原体信号动态的新见解.
相关概念视频
Catenins
Catenins are characterized by multiple binding domains and dynamic structures that allow them to function as linker proteins in cell junction complexes. All catenins, except α-catenin, contain a characteristic protein sequence called the armadillo repeat and are therefore also called armadillo proteins.
Catenins in Cell Junctions
Catenins bind to cell adhesion molecules such as cadherins and link them to different cytoskeletal proteins depending on the type of cell junction. At the adherens...
Catenins in Cell Junctions
Catenins bind to cell adhesion molecules such as cadherins and link them to different cytoskeletal proteins depending on the type of cell junction. At the adherens...
Non-Canonical Wnt Signaling Pathways
Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...
Non-Canonical Wnt Signaling Pathways
Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...
Canonical Wnt Signaling Pathway
The gene encoding the main signaling molecules of the Wnt signaling pathways (the Wnt proteins) was discovered almost four decades ago by Nüsslein-Volhard and Wieschaus. They identified and originally named the gene "wingless" (wg) after a phenotype discovered during their landmark genetic screen in Drosophila for body pattern defects. At around the same time, another researcher named Harold Varmus found that a murine tumor virus activates the mammalian wg homolog, Int-1, which results in tumor...
Canonical Wnt Signaling Pathway
The gene encoding the main signaling molecules of the Wnt signaling pathways (the Wnt proteins) was discovered almost four decades ago by Nüsslein-Volhard and Wieschaus. They identified and originally named the gene "wingless" (wg) after a phenotype discovered during their landmark genetic screen in Drosophila for body pattern defects. At around the same time, another researcher named Harold Varmus found that a murine tumor virus activates the mammalian wg homolog, Int-1, which results in tumor...
Assembly of Signaling Complexes
Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
