在缺氧期间,SUMO特异性蛋白酶1对于稳定HIF1alpha至关重要
Jinke Cheng1, Xunlei Kang, Sui Zhang
1Department of Cardiology, The University of Texas MD Anderson Cancer Center, The University of Texas, Houston Health Science Center, Houston, TX 77030, USA.
Cell
|November 6, 2007
概括
Sentrin/SUMO特异蛋白酶1 (SENP1) 对于胎儿发育至关重要. 失去SENP1会通过破坏低氧诱导因子1alpha (HIF1alpha) 的稳定性而导致贫血,从而影响红色素的产生.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 生理学 生理学 生理学
背景情况:
- SUMOylation和deSUMOylation是关键的监管过程.
- 人们对SUMOylation和deSUMOylation的生理作用尚不完全了解.
- 林/SUMO特异性蛋白酶 (SENPs) 能够逆转SUMOylation的过程.
研究的目的:
- 为了研究SENP1缺乏的生理后果.
- 阐明SENP1在调节缺氧诱导因子1alpha (HIF1alpha) 稳定性和红素 (Epo) 生产中的作用.
主要方法:
- 对SENP1淘汰赛小鼠 (SENP1(-/-) 的表型分析.
- 在SENP1中对HIF1alpha稳定性和SUMOylation在SENP1中缺氧期间的研究-/-) 小鼠胚胎纤维细胞 (MEF).
- 评估缺氧诱导的基因转录 (VEGF,Glut-1).
主要成果:
- 由于缺少Epo生产,SENP1(-/-) 胚胎表现出严重的胎儿贫血和中产死亡率.
- 在低氧条件下,SENP1对于调节HIF1alpha稳定性至关重要.
- 缺氧诱导的HIF1alpha的SUMOylation通过VHL复合体促进其无处不在和降解.
- 在SENP1中观察到的HIF1α-依赖基因的转录减少.
结论:
- 通过控制HIF1alpha稳定性,SENP1在低氧反应途径中发挥着关键作用.
- SUMOylation 作为一种直接信号,用于依赖于乌比奎的蛋白质降解.
- SENP1对于正常的红色受体形成和胚胎发育至关重要.
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