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调节Nrf2活性:在氧化回归稳定中,泛素酶和信号分子在氧化回归稳定中起作用
John D Hayes1, Sharadha Dayalan Naidu1, Albena T Dinkova-Kostova1
1Jacqui Wood Cancer Centre, Division of Cancer Research, Ninewells Hospital and Medical School, University of Dundee, Dundee DD1 9SY, UK.
Trends in biochemical sciences
|January 28, 2025
概括
转录因子Nrf2对于细胞防御至关重要,由E3无素连接酶调节. 这些酶控制Nrf2的稳定性,影响细胞对氧化应激的反应,并维持平衡.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 核因子红色素2相关因子2 (Nrf2) 是一个关键的转录因子,调节细胞防御机制对氧化剂和电友.
- Nrf2蛋白质的稳定性受到多个E3泛素酶的严格控制,包括CRL3Keap1,CRL4DCAF11,SCFβ-TrCP和Hrd1.
- CRL3Keap1结合酶在恒温条件下在构成性降解Nrf2中发挥着关键作用,这种过程被氧化应激因素抑制.
研究的目的:
- 阐明控制Nrf2活动的调节机制,由各种E3无素连接酶控制.
- 讨论如何在不同的细胞条件下调节Nrf2活性.
- 识别能调节CRL3Keap1活性以应对压力和恢复平衡的内源信号分子.
主要方法:
- 审查和讨论现有的关于Nrf2调节的文献E3无素连接酶.
- 在Nrf2抑制中分析涉及SQSTM1/p62,GSK3和PKB/Akt的信号通路.
- 检查酸化在Nrf2和SQSTM1/p62规则中的作用.
主要成果:
- CRL3Keap1是主要的结合酶,向Nrf2进行降解,但其活性因氧化应激而被抑制.
- SQSTM1/p62及其酸化减弱了通过CRL3Keap1的Nrf2抑制.
- 由SCFβ-TrCP介导的抑制需要GSK3的Nrf2酸化,其活性由PKB/Akt等激酶调节.
结论:
- Nrf2活动是由E3无素连接酶和调节蛋白质的网络动态控制的.
- 了解这些调节通路对于理解细胞对压力的反应和维持平衡至关重要.
- 内生信号分子可以使CRL3Keap1失活,为与压力相关的疾病提供潜在的治疗点.
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