线粒体复杂性在ER-线粒体接触点通过PDZD8-FKBP8连接进行调节
Koki Nakamura1, Saeko Aoyama-Ishiwatari1, Takahiro Nagao1
1Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Tokyo, 113-8656, Japan.
Nature communications
|April 17, 2025
概括
研究人员确定FKBP8是ER蛋白PDZD8的线粒体合作伙伴,形成了一个新的连接复合体. 这种复合体对于线粒体-ER膜接触部位 (MERCS) 至关重要,并调节线粒体形态.
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:
- 线粒体-ER膜接触部位 (MERCS) 对于细胞功能至关重要.
- 已知ER蛋白PDZD8参与MERCS的形成.
- 对于PDZD8的线粒体结合伙伴仍然未被确定.
研究的目的:
- 为了识别与ER蛋白PDZD8.8结合的外部线粒体膜 (OMM) 蛋白质.
- 阐明这种新型ER-线粒体结合复合体在MERCS形成和线粒体形态学中的作用.
主要方法:
- 没有偏见的近距离蛋白质组学
- 在CRISPR-Cas9内源性蛋白质标记上.
- 低温电子断层扫描 (Cryo-electron tomography) 是一种电子断层扫描技术.
- 相对光电子显微镜相对光电子显微镜.
- 单个分子跟踪跟踪.
主要成果:
- FKBP8被确定为PDZD8.8的OMM连接合作伙伴.
- PDZD8在ER膜上表现出动态扩散,在MERCS.有特定的相互作用.
- 过度表达FKBP8可以减少ER-OMM距离.
- 同时删除PDZD8和FKBP8损害了MERCS的形成,突出了它们的相互依赖.
- PDZD8以FKBP8依赖的方式促进线粒体复杂性.
结论:
- 一种由PDZD8和FKBP8组成的新型ER-线粒体结合复合体已被确定.
- 这个综合体在建立和维护MERCS中起着至关重要的作用.
- PDZD8-FKBP8复合体调节了哺乳动物细胞中的线粒体形态和复杂性.
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