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基转移酶1驱动一个依赖于线粒体的程序,诱导细胞死亡.
Akhilesh Kumar1,2, Corin R O'Shea3, Vikas K Yadav4
1Department of Molecular & Cellular Pharmacology, University of Miami Miller School of Medicine, Miami, FL, USA. akhilesh.kumar@bhu.ac.in.
基转移酶1 (Ate1) 酶调节细胞死亡. 在氧化应激下Ate1的线粒体转位会触发细胞灭绝,独立于细胞溶解途径,揭示了它在线粒体依赖细胞死亡中的作用.
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:
- 细胞死亡调节对于应激适应和信号传递至关重要.
- 阿尔金转移酶1 (Ate1) 是一种进化保守的酶,参与真核细胞细胞死亡.
- 以前的研究集中在Ate1在蛋白质降解中的细胞质作用上,忽视了其更广泛的功能.
研究的目的:
- 为了研究 arginyltransferase1 (Ate1) 在细胞死亡中的作用.
- 探索Ate1.1的亚细胞局部化和压力诱导的转位.
- 为了阐明Ate1介导的细胞死亡的机制.
主要方法:
- 利用芽生长酵母作为一个模型生物.
- 在氧化应激条件下研究了Ate1局部化.
- 评估了Ate1诱导的细胞死亡对线粒体因子和细胞溶解途径的依赖性.
主要成果:
- 线粒体转移Ate1是由氧化压力诱导的.
- Ate1的线粒体局部化对于亡至关重要.
- Ate1诱导的细胞死亡取决于线粒体的透性过渡孔形成,而不是直接取决于ROS或ETC活动.
- 细胞质蛋白降解途径对Ate1诱导的细胞死亡的影响很小.
结论:
- 基转移酶1 (Ate1) 控制了一种依赖于线粒体的细胞死亡途径.
- 线粒体内Ate1的定位是压力诱导的亡的一个关键事件.
- Ate1在细胞死亡中的作用超出了其在细胞质蛋白降解中的已知功能.
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