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SUMO-3促进了TRIM5555的依赖于无处不在的营业额
Nour-El-Houda Hammami1, Natacha Mérindol1, Mélodie B Plourde1
1Department of medical biology, Université du Québec à Trois-Rivières, Trois-Rivières, QC, Canada.
Biochemistry and cell biology = Biochimie et biologie cellulaire
|September 13, 2023
概括
人类肌肉特定的RING指 (MURFs) 蛋白质没有SUMOylated. 然而,SUMO-3影响TRIM55蛋白的稳定性,局部化和无处不在,这表明它在肌肉调节中的作用.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 人类肌肉特定的RING指 (MURFs) 是三分 motif (TRIM) 蛋白家族的一部分.
- MURFs参与了 sarcomere 形成和微管子动态.
- 一些TRIM蛋白通过SUMOylation进行翻译后修饰.
研究的目的:
- 为了研究MURF蛋白 (TRIM54,TRIM55,TRIM63) 的SUMOylation.
- 为了探索MURF和SUMO蛋白之间的相互作用.
- 确定SUMOylation对TRIM55稳定性,局部化和无处不在性的影响.
主要方法:
- 西方涂抹以检测SUMOylation. 这是一个很好的方法.
- SUMO-1和SUMO-3的过度表达.
- 在TRIM55.5中预测的SUMO相互作用基因 (SIMs) 的位点定向突变发生.
- 免疫光显微镜用于评估亚细胞局部化.
- 立方体检测测试. 在线检测.
主要成果:
- 没有发现TRIM54,TRIM55和TRIM63是SUMOylated的.
- 过度表达SUMO-3,但不是SUMO-1,通过蛋白质和溶酶体降解增加了TRIM55的周转率.
- TRIM55 包含两个预测的 SUMO 交互模式 (SIM).
- 与野生型 (WT) TRIM55相比,TRIM55的SIM1和SIM2中的突变导致蛋白质稳定性增加和多基化减少.
- SIM图案影响了TRIM55.5的亚细胞定位.
结论:
- MURFs不是直接与SUMOylated相关的.
- SUMO-3或SUMO-3修饰蛋白调节TRIM55的局部化,稳定性和E3无处不在酶活性.
- 这些发现提供了关于TRIM55的翻译后调节及其在肌肉生物学中的作用的见解.
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