在USP12/46 deubiquitinases保护整体从ESCRT介导的溶酶体降解
Kaikai Yu1, Guan M Wang1, Shiny Shengzhen Guo1
1Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried, Germany.
EMBO reports
|November 6, 2024
概括
一个含有USP12/46,WDR48和WDR20的二基化复合物通过防止其溶酶体降解来稳定β-1整合素 (Itgb1). 这种复合物从内部化的Itgb1中去除了ubiquitin,促进了它的表面保留.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 蛋白质法规中的蛋白质法规
背景情况:
- 综合素的功能受到贩运的调节,包括内化,内体分类,降解或回收.
- 无处不在的系统在确定内化蛋白质的命运方面发挥着至关重要的作用,决定了降解与回收.
- 整合素表面水平对细胞过程至关重要,并且受到严格控制.
研究的目的:
- 为了确定调节整合素表面水平的二维基提纳酶 (DUB).
- 阐明DUBs控制整体贩运和退化机制.
- 了解特定的DUB复合体在稳定整合素表面表达中的作用.
主要方法:
- 基因查以确定参与整蛋白调节的DUB.
- 靠近依赖生物识别 (BioID) 用于精确确定相互作用的蛋白质.
- 生物化学试验分析泛化状态和蛋白质降解途径.
主要成果:
- 一个三元双化复合体,USP12/46-WDR48-WDR20,被确定为整合素表面水平的关键调节者.
- 这种复合物在早期内基因组中的内化β-1整合素 (Itgb1) 的细胞质尾部中进行双化.
- 通过USP12/46-WDR48-WDR20复合体进行的除布基化可以防止ESCRT介导的分类和随后的Itgb1.1.的 lysosomal降解.
结论:
- USP12/46-WDR48-WDR20复合体作为细胞表面β-1整合素的关键稳定剂.
- 这种DUB复合物通过去除ubiquitin标签来防止内部化整合素的溶酶体降解.
- 了解这种调节机制,可以了解整合素稳态和潜在的治疗点.
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