脱化酶突变发生屏幕识别了一个USP43依赖的HIF-1转录反应
Tekle Pauzaite1, Niek Wit1, Rachel V Seear1
1Cambridge Institute of Therapeutic Immunology & Infectious Disease (CITIID), Jeffrey Cheah Biomedical Centre, Department of Medicine, University of Cambridge, Cambridge, CB2 0AW, United Kingdom.
The EMBO journal
|July 15, 2024
概括
脱化酶 (DUBs) 调节氧气感应. 研究人员确定USP43对于通过增强HIF-1核积累而不是稳定性来激活低氧诱导因子 (HIF) 信号至关重要.
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:
- 低氧诱导因子 (HIFs) 是甲基动物中氧气感应的关键调节者.
- 在这个过程中,HIF无化和蛋白质体降解是核心的.
- 双化酶 (DUB) 在HIF信号传递中的作用在很大程度上仍未被定义.
研究的目的:
- 调查DUBs在HIF信号通路中的参与.
- 为了识别调节HIF激活或抑制的特定DUB.
- 阐明USP43影响HIF信号的机制.
主要方法:
- 使用定制的DUB sgRNA库进行CRISPR/Cas9变异性选.
- 低氧调节试验. 低氧调节试验.
- 同免疫沉以评估蛋白质相互作用.
- 对HIF-1α核积累和基因结合的分析.
主要成果:
- USP43被确定为有效的HIF响应激活所必需的DUB.
- USP43是由低氧调节的,并且与HIF-1α特别相关.
- USP43促进HIF-1核积累和目标基因结合,而不会影响HIF-1α的稳定性.
- USP43以低氧和酸化依赖的方式与14-3-3蛋白相互作用,以提高核HIF-1水平.
结论:
- USP43在促进HIF信号传输方面发挥着至关重要的作用.
- DUBs表现出多功能性,提供超出其催化活动的信号作用.
- 这项研究揭示了一种通过USP43和14-3-3蛋白调节HIF核转位的新机制.
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