动态3D蛋白质在现场显示高分辨率的蛋白质功能变化
Valentina Cappelletti1, Thomas Hauser1, Ilaria Piazza1
1Institute of Molecular Systems Biology, Department of Biology, ETH Zurich, Zurich, Switzerland.
Cell
|December 28, 2020
概括
限定的蛋白质解质谱 (LiP-MS) 显示了传统方法所忽略的功能蛋白质变化. 这种结构性读取提供了对生物调节和疾病机制的新见解.
科学领域:
- 蛋白质组学
- 结构生物学
- 系统生物学
- 生物化学
背景情况:
- 许多生物过程依赖于蛋白质的修饰和相互作用,而不仅仅是蛋白质水平,这通常是标准蛋白质组学错过的.
- 了解这些动态功能变化对于解读细胞调节和疾病机制至关重要.
研究的目的:
- 引入和验证全球蛋白质结构读取技术,有限蛋白质溶解质谱 (LiP-MS),用于检测功能蛋白质变化.
- 在各种条件下证明LiP-MS在复杂的生物系统,包括细菌和酵母中的应用.
主要方法:
- 使用有限蛋白质分解质谱法 (LiP-MS) 来生成总蛋白质结构读数.
- 该技术应用于细菌和酵母模型,分别进行营养适应和应激反应.
- 结构变化被视为"结构条形码",并对功能洞察进行分析.
主要成果:
- LiP-MS成功检测出功能性变化,包括酶活性变化,酸化,蛋白质聚合和复合物形成.
- 该方法提供了高分辨率,识别特定功能部位的变化,如结合部位和活性部位.
- LiP-MS 发现了一种新的果糖-1,6-双酸调节机制,用于大肠杆菌的葡萄糖吸收,并证实了已知途径的改变.
结论:
- 通过检测功能性蛋白质动态,LiP-MS显著扩大了经典蛋白质组学的覆盖范围.
- 这项技术产生了机制性假设,并促进了新型监管机制的识别.
- 通过LiP-MS能够在现场进行结构系统生物学,为更深入地了解细胞功能铺平了道路.
相关概念视频
01:33Proteomics
8.9K
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...
8.9K
01:19Protein Dynamics in Living Cells
2.5K
Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
2.5K