一个通用近距离标记平台,用于在压力下绘制线粒体蛋白质和有机体相互作用的地图
Enming Miao1,2, Xuyang Yue1,2, Zhixiong Tao1,2
1State Key Laboratory of Medical Proteomics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
Journal of proteome research
|December 23, 2025
概括
我们开发了定制的抗体导向近距离标记 (TAG-PL),一种无转染的方法来绘制线粒体蛋白质的地图. TAG-PL揭示了热应激细胞中的线粒体变化,并确定了压力颗粒-线粒体相互作用.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生物化学
- 分子生物学分子生物学
背景情况:
- 线粒体功能障碍与各种疾病有关.
- 目前的近距离标记方法有局限性,包括需要基因转染和专用探针,限制它们在某些细胞类型和疾病模型中的应用.
研究的目的:
- 开发一种无转染的近距离标记技术,用于全面的线粒体蛋白质组映射.
- 在细胞压力条件下调查线粒体蛋白质组动力学.
- 为了确定线粒体和其他细胞组件之间的新型相互作用.
主要方法:
- 定制抗体导向近距离标签 (TAG-PL) 的开发,这是一个新的无转染的近距离标签方法.
- 应用TAG-PL以高特异性 (>90%) 地图化线粒体蛋白质组.
- 在热应激巨细胞中利用TAG-PL来分析动态蛋白质组重塑和识别蛋白质相互作用.
主要成果:
- TAG-PL成功识别了450多种线粒体蛋白质,超过了现有的非传染方法的覆盖范围.
- 揭示了热应激巨细胞中线粒体蛋白质组的动态重塑,包括抗氧化反应和代谢转变.
- 发现了压力颗粒和线粒体之间的物理相互作用,确定了10个关键相互作用媒介,如MSRA和UBA1.1.
结论:
- TAG-PL是一种高性能,无传染的工具,用于深入的线粒体蛋白质组分析,适用于各种细胞类型和组织,包括免疫细胞.
- 已建立的压力颗粒作为调节枢纽,影响器官活力和免疫反应.
- TAG-PL在没有遗传操纵的疾病模型中促进了对线粒体功能的研究,克服了当前技术的局限性.
相关概念视频
Translocation of Proteins into the Mitochondria
11.8K
Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
11.8K
Mitochondrial Protein Sorting
5.6K
Mitochondria are double-membrane organelles of the eukaryotes involved in cellular metabolism, signaling, ATP synthesis, and programmed cell death. Each of these processes requires specific proteins and enzymes that must be correctly sorted to the right mitochondrial subcompartment for the proper functioning of the organelle.
Most of these mitochondrial proteins are encoded by the nucleus and imported to the mitochondria as unfolded or loosely folded precursors. Mitochondrial precursors...
Most of these mitochondrial proteins are encoded by the nucleus and imported to the mitochondria as unfolded or loosely folded precursors. Mitochondrial precursors...
5.6K
Mitochondrial Precursor Proteins
3.5K
Mitochondrial precursors are partially unfolded or loosely folded polypeptide chains. Newly synthesized precursors are inhibited from spontaneously folding into their native conformation by the cytosolic chaperones, heat shock proteins 70 (Hsp70), and mitochondrial import stimulation factors (MSFs). Precursors bound to MSFs are guided to the TOM70-TOM37 receptors, while precursors bound to Hsp70 chaperones are targetted to TOM20-TOM22 receptor complexes.
Most of the mitochondrial...
Most of the mitochondrial...
3.5K


