一个由DELE1调节的线粒体铁反应通路.
Yusuke Sekine1, Ryan Houston2, Eva-Maria Eckl3
1Aging Institute, Department of Medicine, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA; Division of Endocrinology and Metabolism, Department of Medicine, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA.
Molecular cell
|June 16, 2023
概括
缺铁会通过线粒体蛋白DELE1.1.激活血红受调的激酶HRI. 在线粒体上DELE1的稳定性触发了综合应激反应,保护细胞免受铁有限的死亡.
科学领域:
- 细胞生物学 细胞生物学
- 线粒体生物学 线粒体生物学
- 铁的新陈代谢 铁的新陈代谢
背景情况:
- 血液调节激酶 (HRI) 激活在铁缺乏症下是已知的,但机制尚不清楚.
- 线粒体在细胞铁平衡和应激反应中起着至关重要的作用.
研究的目的:
- 阐明铁缺乏引起的HRI激活的分子机制.
- 确定线粒体蛋白质在铁感应和压力信号传递中的作用.
主要方法:
- 研究了线粒体蛋白DELE1在HRI激活中的作用,使用铁化和基因剥离研究.
- 评估了DELE1线粒体的进口和稳定性.
- 分析了综合应激反应 (ISR) 的激活.
- 利用红状腺细胞模型研究在铁限制下细胞死亡.
主要成果:
- 铁缺乏引起的HRI激活需要线粒体蛋白DELE1.1.
- 线粒体进口和DELE1的稳定性是由铁的可用性调节的.
- 在线粒体进口后,DELE1通常被蛋白酶LONP1降解.
- 铁化阻断了DELE1的进口,使其稳定在线粒体表面,并激活HRI介导的ISR.
- 切除DELE1-HRI-ISR通路会增加红色素细胞在铁限制下的细胞死亡.
结论:
- 线粒体DELE1的导入调控是线粒体新铁传感途径的关键组成部分.
- 这一途径激活了应激信号 (ISR),以应对铁平衡中断.
- 在需要铁的细胞中,DELE1-HRI-ISR通路起着细胞保护作用.
关键词:
在 DELE1 中,您可以使用 DELE1.在HRI上,HRI是HRI.这就是LONP1的意义.红色甲状腺细胞 红色甲状腺细胞综合应激反应综合应激反应铁是铁,铁是铁,铁是铁.线粒体中的线粒体.线粒体进口是什么意思线粒体蛋白质稳定酶是线粒体的蛋白质稳定酶.更多相关视频
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