基于活动的ubiquitin探针捕获了deubiquitinases的硫化状态
Zian Chen1, Guorui Li2, Jiahao Zhang1
1State Key Laboratory of Chemo and Biosensing, School of Biomedical Sciences, Hunan University, Changsha, 410082, China.
Angewandte Chemie (International ed. in English)
|September 8, 2025
概括
研究人员开发了基于全方位的新型活性探针 (Ub-ABPs),专门捕获氧化二基酶 (DUB-SOH). 这些探针有助于了解氧化应激如何影响癌症等疾病中的DUB功能.
科学领域:
- 生物化学 生物化学
- 化学生物学 化学生物学
- 蛋白质组学是指蛋白质组学.
背景情况:
- 脱基酶 (DUBs) 调节细胞过程,但它们的活性受到氧化应激的影响.
- 氧化对DUBs的改造,特别是催化氨酸的硫化,改变了它们的功能.
- 现有的基于活动的泛素探针 (Ub-ABPs) 主要针对DUBs的原始状态,而不是它们的氧化形式.
研究的目的:
- 开发能够选择性地捕获硫化DUB (DUB-SOH) 的新型Ub-ABP.
- 用基于活动的探测器研究氧化应激对DUB活动的影响.
- 确定DUB-SOH目标并阐明氧化还原依赖的DUB调节.
主要方法:
- 设计和合成了三个具有不同的弹头的新型Ub-ABP (norbornene,dimedone衍生的循环C核友).
- 对标记DUB-SOH的探针有效性的评估.
- 优化乌比基链长度,以提高探针亲和力.
- 应用优化的探针用于目标丰富和识别,使用免疫捕获和定量蛋白质组学.
主要成果:
- 生物-Ub-PRD和生物-Ub75-DYn-2成功标记了DUB-SOH,证明了有效地捕获氧化DUBs.
- 与其他无处不在的长度相比,Ub74变种对DUB-SOH有增强的亲和力.
- 生物-Ub74-DYn-2 能够通过蛋白质组学来丰富和识别DUB-SOH目标.
结论:
- 针对硫酸的新型Ub-ABP是研究氧化DUB的有效工具.
- 这些探测器有助于阐明氧化还原依赖的DUB调节.
- 开发的Ub-ABP在了解疾病背景中的氧化还原失调方面具有潜在的应用.
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