功能性S-化探索揭示了HNF1α的新型调节机制
Yaqian Huang1, Zongmin Li1, Shuai Wang2
1Department of Pediatrics, Children's Medical Center, Peking University First Hospital, Beijing, 100034, China.
Redox biology
|November 22, 2025
概括
硫化 (H2S) 修改蛋白质,但遗漏了像转录因子这样的低丰富度调节剂. 这项研究确定了HNF1α S-过硫化,揭示了影响脂质代谢和心血管健康的氧化还原机制.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 蛋白质组学是指蛋白质组学.
背景情况:
- 蛋白质S-过硫化,一种通过硫化 (H2S) 的翻译后修饰,调节蛋白质功能.
- 当前的方法经常错过低丰度蛋白质,包括关键的转录因子 (TFs),在S-过硫化分析中.
- 发现TF在跨物种S-过硫化数据集中显著不足.
研究的目的:
- 开发一种策略来识别低丰度的S-过硫化蛋白,特别是TFs.
- 调查S-超硫化在调节脂质代谢和心血管功能的作用.
- 发现新的基于氧化还原的转录机制.
主要方法:
- 综合跨物种数据集 (Homo sapiens,Mus musculus,Arabidopsis thaliana) 用于S-过硫化分析.
- 利用来自Oximouse数据库的氧化蛋白质组学数据来识别与年龄相关的氧化还原变化.
- 应用质谱学证实肝细胞核因子1α (HNF1α) 在Cys241.1.的S-过硫化.
主要成果:
- 鉴定出肝细胞核因子1α (HNF1α) 作为一种S-过硫化TF.
- 证明H2S诱导的HNF1α在Cys241的S-化会通过结构变化破坏DNA结合.
- 观察到PCSK9表达减少,改善脂质配置文件,并在HNF1α S-化后在小鼠中减轻动脉样硬化.
结论:
- 跨物种战略有效地揭示了功能性S-过硫化目标,包括TFs.
- HNF1α S-化代表了一种基于氧化还原的新型转录机制,调节脂质代谢.
- 这种修改提供了对动脉样硬化的保护作用,突出了其心血管相关性.
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