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通过LRP6-CK1ε轴,R-spondin-1诱导了阿辛的降解
Lifeng Tan1, Mengfang Yan1, Zijie Su1,2
1Guangdong Provincial Key Laboratory of Regional Immunity and Disease, International Cancer Center, Marshall Laboratory of Biomedical Engineering, Department of Pharmacology, Shenzhen University Medical School, Shenzhen University, Shenzhen, 518055, Guangdong, China.
Cell communication and signaling : CCS
|January 5, 2024
概括
通过ubiquitin-proteasome系统,R-spondins (RSPOs) 通过降解Axin来激活Wnt/β-catenin通路. 这一过程涉及LRP6和CK1ε,揭示了RSPO发育和平衡中信号传递的新机制.
科学领域:
- 蜂信号传输是如何进行的
- 分子生物学分子生物学
- 发育生物学是发展生物学.
背景情况:
- R-spondins (RSPOs) 是分泌的蛋白质,可以增强Wnt/β-catenin信号传递.
- RSPO1在组织发育和平衡中起着至关重要的作用.
- 通过RSPO介导的Wnt/β-catenin激活的精确分子机制尚未完全理解.
研究的目的:
- 阐明R-spondins (RSPOs) 激活Wnt/β-catenin通路的分子机制.
- 调查阿克辛降解在RSPO信号传输中的作用.
- 为了确定参与RSPO诱导的Wnt通路激活的关键蛋白相互作用.
主要方法:
- 同免疫沉 (Co-IP) 试验用于研究蛋白质相互作用.
- 基因淘汰和抑制剂治疗以评估蛋白质降解途径.
- 西方涂抹用于分析蛋白质水平.
- 报告器基因测试 (SuperTOPFlash) 用于测量Wnt/β-catenin的转录活性.
主要成果:
- 通过无素-蛋白酶体通路,RSPO调解了素降解.
- RSPO1促进了Axin1和CK1ε之间的相互作用,促进了Axin1的降解.
- CK1ε的淘汰或抑制会增加Axin1水平,并阻止RSPO1诱导的Axin1降解.
- 刺激RSPO1增加了LRP6与CK1ε和Axin1.1的关联.
- RSPO1和Wnt3A协同降低了Axin1蛋白水平,并增强了SuperTOPFlash的活动.
结论:
- RSPOs通过一种新的机制激活Wnt/β-catenin信号传输,其中包括LRP6/CK1ε介导的Axin.
- 这一途径对于调节生物过程中的Wnt/β-catenin信号传递至关重要.
- 了解这种机制,可以了解组织发育和恒常性.
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