蛋白质稳定中的GCN2:结构逻辑,信号网络和疾病
JiaYi Zhu1,2, Stefan J Marciniak1,2,3
1Cambridge Institute for Medical Research (CIMR), University of Cambridge, UK.
The FEBS journal
|March 4, 2026
概括
综合应激反应 (ISR) 激酶GCN2通过平衡蛋白质合成和降解来维持细胞健康. 失调的GCN2活性与疾病有关,使其成为恢复蛋白质稳定性的治疗点.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 蛋白质稳定,蛋白质合成,折叠和降解的平衡,对细胞健康至关重要.
- 干扰导致蛋白质错误积累和压力反应,如综合应激反应 (ISR).
- 在ISR中,GCN2激酶是氨基酸和核糖体应激的关键传感器.
研究的目的:
- 审查GCN2在关联营养感应与转化控制和代谢适应中的作用.
- 探索GCN2在维持蛋白质稳定中的功能.
- 讨论GCN2在与蛋白质错折和压力失衡相关的疾病中的治疗潜力.
主要方法:
- 关于GCN2在细胞应激反应中的作用的文献评论.
- 分析GCN2与其他监管网络 (例如mTORC1) 的相互作用.
- 检查GCN2在神经退行,癌症和肺血管疾病等病理方面的参与.
主要成果:
- GCN2激活酸化eIF2α,减少全球翻译并促进ATF4/CHOP合成.
- ATF4驱动了氨基酸代谢,氧化还原平衡,自和蛋白质体降解的转录程序.
- GCN2调节mTORC1,促进自,促进压力颗粒的形成,并集成各种压力信号.
结论:
- 通过协调转化控制和代谢适应,GCN2对于恢复蛋白质稳定至关重要.
- 失调的GCN2活动有助于各种病理.
- 准GCN2为特征为蛋白质错折和压力通路失衡的疾病提供了潜在的治疗策略.
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