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一个KDELR介导的ER检索系统通过裂变酵母中的未折叠蛋白质反应调节线粒体功能
Mengdan Zhu1, Zheng Fang1, Yifan Wu1
1MOE Key Laboratory for Cellular Dynamics & Center for Advanced Interdisciplinary Science and Biomedicine of IHM, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China; Anhui Key Laboratory of Cellular Dynamics and Chemical Biology & Hefei National Research Center for Interdisciplinary Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, China.
缺少KDEL受体 (Erd2) 触发了酵母中展开的蛋白质反应 (UPR),增强了线粒体呼吸和反应性氧物种的细胞存活. 这揭示了ER检索在细胞平衡中发挥的新角色.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 酵母遗传学 酵母遗传学
背景情况:
- KDEL受体 (Erd2) 从高尔基细胞中获取内细胞网膜 (ER) 居住的蛋白质.
- 细胞平衡中KDELR介导的ER检索系统在细胞平衡中的功能尚未完全理解.
研究的目的:
- 研究KDELR-Erd2介导的ER检索系统在调节细胞平衡中的作用.
- 阐明Erd2缺失对细胞反应的影响,特别是线粒体功能和未折叠蛋白质反应 (UPR).
主要方法:
- 使用了裂变酵母Schizosaccharomyces pombe作为一个模型生物体.
- 诱导了Erd2的缺失,以观察细胞表型.
- 进行了转录组分析,以确定基因表达变化.
- 评估了线粒体呼吸和反应性氧物种 (ROS) 生产.
主要成果:
- 缺少Erd2引发了未折叠的蛋白质反应 (UPR).
- UPR激活以一种依赖于UPR的方式增强线粒体呼吸和ROS产生.
- 参与线粒体呼吸和三碳酸循环的基因在Erd2-缺乏细胞中被上调.
- 增加线粒体呼吸和ROS是必要的细胞存活当Erd2缺席.
结论:
- 通过KDELR-Erd2介导的ER检索系统在调节线粒体功能的过程中发挥了新的作用.
- 这种ER检索系统对于维持细胞平衡在裂变酵母中至关重要.
- 响应Erd2缺失的UPR激活是将ER检索与线粒体调节和细胞存活联系起来的关键机制.
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