基于质谱的蛋白质组学用于研究线粒体转位蛋白的突变体和相互作用体
Silke Oeljeklaus1, Lakshita Sharma1, Julian Bender1
1Biochemistry II, Theodor Boveri-Institute, Biocenter, University of Würzburg, Würzburg, Germany.
Methods in enzymology
|November 2, 2024
概括
这项研究详细介绍了分析线粒体蛋白质进口的质谱 (MS) 协议. 它提供了研究转位突变物和蛋白质相互作用的方法,增强了我们对线粒体生物学的理解.
科学领域:
- 线粒体生物学 线粒体生物学
- 蛋白质组学是指蛋白质组学.
- 细胞生物学 细胞生物学
背景情况:
- 线粒体对细胞功能至关重要,依靠1000-1500种蛋白质的蛋白质组,大多数在细胞器外合成.
- 线粒体蛋白质进口通过转位酶网络介导的特定路径发生,这对于理解线粒体生物学和细胞集成至关重要.
- 质谱法 (MS) 是研究转位酶网络的组成,功能,相互作用和细胞对功能障碍的反应的强大工具.
研究的目的:
- 提供对线粒体转位突变体和相互作用体的MS-enabled功能分析的协议.
- 在TOMM40耗尽后,使用基于MS的蛋白质组学来划定人类线粒体输入组.
- 概述一种亲和性净化MS方法,用于识别与TIM23转位酶的蛋白质关联.
主要方法:
- 基于MS的蛋白质组学包括代谢稳定同位素标记,TOMM40敲除,线粒体分离和液态染色体-MS (LC-MS).
- 深度MS分析包括高pH逆相LC的前分离.
- 亲和性净化MS使用FLAG标记从线粒体部分中分离蛋白质复合体.
主要成果:
- 基于MS的蛋白质组学演示,用于分析转位突变体和划分线粒体进口组.
- 成功应用亲和性净化MS以确定与TIM23转位酶的蛋白质关联.
- 开发LC-MS数据处理,统计分析,可视化和可定制Python代码的方法.
结论:
- 开发的MS协议使线粒体转位突变体和相互作用体的功能分析成为可能.
- 这些方法提高了对线粒体蛋白质进口途径和转位酶作用的理解.
- 这项研究为通过定量蛋白质组学研究线粒体生物学和细胞网络集成提供了宝贵的工具.
关键词:
亲和净化质谱法质谱法.数据分析数据分析进口一些东西.互动组互动组是一个互动组.质谱测量质量谱测量线粒体中的线粒体.蛋白质量化量化的蛋白质.蛋白质组学是指蛋白质组学.这就是SILACLAC.转位突变体的转位突变体更多相关视频
相关概念视频
Translocation of Proteins into the Mitochondria
3.0K
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,...
3.0K
Proteomics
7.2K
A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term...
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term...
7.2K
Mitochondrial Protein Sorting
4.3K
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...
4.3K
Peptide Identification Using Tandem Mass Spectrometry
6.4K
Tandem mass spectrometry, also known as MS/MS or MS2, is an analytical technique that employs two mass analyzers. Essentially it is a series of mass spectrometers that helps isolate a particular biomolecule and then helps study its chemical properties.
This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...
This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...
6.4K
Mitochondrial Precursor Proteins
2.5K
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...
2.5K


