定量蛋白质组分析显示JMJD6和DNAJB11是E3酶RFFL的内源基质
Nikhil Dev Narendradev1,2, Soumitra Marathe3, Sabyasachi Baboo2
1School of Biology, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram, Kerala 695551, India.
Journal of proteome research
|June 26, 2025
概括
研究人员确定了RFFL的新蛋白标,RFFL是一种E3结合酶,对蛋白质降解和细胞健康至关重要. 这一发现推动了针对各种疾病的向蛋白质降解策略.
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:
- 无素-蛋白酶系统 (UPS) 对于蛋白质质量控制至关重要,E3链酶介导蛋白质无素化和降解.
- 不调节的蛋白质降解导致蛋白质积累,并与许多疾病有关,突出了向蛋白质降解作为治疗途径.
- RFFL (环指E3结合酶) 是一种与内体相关的E3结合酶,参与线粒体平衡和清除错误折叠的蛋白质,如囊性纤维化.
研究的目的:
- 系统地识别和描述RFFL E3结合酶的基质.
- 使用直角方法验证已识别的RFFL基板.
- 研究RFFL在已知功能之外的细胞过程中的作用.
主要方法:
- 基于无标签定量质谱的蛋白质组学被用于互动组和差异表达分析.
- 为了进行比较研究,CRISPR/Cas9技术被用来生成RFFL淘汰细胞系.
- 在体内进行了测试,以验证基质的泛化和通过蛋白质体路径通过RFFL降解.
主要成果:
- 蛋白质组分析确定了野生类型,RFFL淘汰和RFFL补充细胞系的RFFL假定基质.
- 验证了JMJD6和DNAJB11作为RFFL的内源基质.
- 通过蛋白质体通路,RFFL被证明可以在任何地方化和降解JMJD6和DNAJB11.
- 发现了RFFL在脂质代谢中的新型作用.
结论:
- 这项研究提供了使用多种互补方法首次全面和公正地识别RFFL基材.
- 这些发现验证了JMJD6和DNAJB11作为RFFL基质,并阐明了它们的降解机制.
- 发现RFFL参与脂质代谢的发现为研究其更广泛的细胞功能开辟了新的途径.
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