斯克里布尔-SGEF-Dlg1复合体调节了上皮细胞中E-cadherin和ZO-1的稳定性,循环和转录
Agustin Rabino1, Sahezeel Awadia1, Nabaa Ali1
1Department of Biological Sciences, University of Toledo, Toledo, OH 43606, USA.
Journal of cell science
|October 1, 2024
概括
斯克里布尔-SGEF-Dlg1复合体维持了上皮屏障功能和蛋白质的稳定性. SGEF 枯竭会破坏 E-cadherin 的稳定,从而触发一个反循环,从而减少 E-cadherin 的转录.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 皮质生物学 皮质生物学
背景情况:
- 斯克里布尔-Dlg1极性复合体与SGEF (ARHGEF26) 相互作用,这是一个RhoG特定的GEF.
- 这种复合体调节粘附结和上皮质屏障功能.
- SGEF静音降低了E-cadherin和ZO-1蛋白水平,但机制尚不清楚.
研究的目的:
- 阐明Scribble-SGEF-Dlg1复合体在调节上皮细胞结合中的分子机制.
- 研究该复合体在维持E-cadherin和ZO-1蛋白水平以及紧接透性的作用.
主要方法:
- 研究了Scribble-SGEF-Dlg1复合体在上皮细胞中的作用.
- 分析了E-cadherin和ZO-1的蛋白质水平.
- 评估紧接口的透性. 评估紧接口的透性.
- 研究了E-cadherin内部化,β-catenin信号传递和slug表达.
主要成果:
- 斯克里布尔-SGEF-Dlg1复合体对于顶峰结的稳定性,ZO-1水平和紧密结的透性至关重要.
- 只有SGEF可以通过防止其在膜上的不稳定性来调节E-cadherin水平.
- 缺少SGEF会启动一个反循环,涉及E-cadherin内细胞,β-catenin信号和Slug介导的转录抑制.
结论:
- 斯克里布尔-SGEF-Dlg1复合体在维持上皮质完整性方面发挥着至关重要的作用.
- SGEF是通过一种新的反机制对E-cadherin稳定性和转录的关键调节者.
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