相关实验视频
Updated: Jan 13, 2026

10:23
Lipid Droplet Isolation for Quantitative Mass Spectrometry Analysis
Published on: April 17, 2017
10.6K
LipoID 描述了脂质滴滴相互作用,并识别了器官间调节器
Hengke Guo1, Wang Wan1, Yanan Huang2
1State Key Laboratory of Medical Proteomics, National Chromatographic R. & A. Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.
Nature chemical biology
|January 9, 2026
概括
研究人员开发了LipoID,这是一种研究脂质滴 (LD) 与线粒体等其他细胞部位的相互作用的新方法. 这项技术捕获了这些关键代谢相互作用的分子细节.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生物化学
- 蛋白质组学是指蛋白质组学.
背景情况:
- 脂质滴 (LDs) 对于细胞代谢平衡至关重要,与线粒体等器官具有动态相互作用.
- LDs的短暂性质在研究它们的分子相互作用方面提出了挑战.
- 了解LD-有机体相互作用是细胞代谢调节的关键.
研究的目的:
- 开发一种新的方法,用于脂滴互动组的现场分析.
- 捕获和分析参与LD-有机体相互作用的分子组成部分.
- 为了确定脂质滴-线粒体附近的新型调节者.
主要方法:
- 开发LipoID,一种基于小分子的光催化蛋白近距离标记方法.
- 使用LD准探头来催化LD附近的蛋白质修饰.
- 使用液体染色学-并联质谱法 (LC-MS/MS) 和比较蛋白质组学分析标记的蛋白质.
主要成果:
- LipoID成功捕获了已知的LD生物标志物 (例如,利平素) 并确定了绑定的器官间相互作用,特别是与线粒体.
- 通过PLIN3.3发现线粒体电压依赖离子通道3 (VDAC3) 作为LD-线粒体近距离的潜在调节者.
- 代谢学分析表明,脂质代谢发生了变化,与观察到的LD-线粒体相互作用一致.
结论:
- LipoID 是一个有效的工具,用于 LD 相互作用组的 in situ 概况.
- 这项研究揭示了对涉及脂质滴和线粒体的器官间调节的新见解.
- 确定了VDAC3-PLIN3相互作用作为调节LD-线粒体附近和细胞代谢的关键参与者.
相关概念视频
Membrane Domains
7.0K
The membrane domains concentrate specific lipids and proteins at one place within the membrane, which helps in cell signaling, adhesion, and other critical cellular processes. These domains can differ in size, composition, function, and lifespan.
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the...
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the...
7.0K
Membrane Fluidity
14.4K
Membrane fluidity is explained by the fluid mosaic model of the cell membrane, which describes the plasma membrane structure as a mosaic of components—including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character.
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is...
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is...
14.4K
Membrane Fluidity
172.5K
Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.
172.5K
Asymmetric Lipid Bilayer
9.6K
Biological membranes show uneven distribution of different types of lipids in the inner and outer layers, resulting in transverse asymmetric membranes. The treatment of the erythrocyte membrane with the enzyme phospholipase confirmed the asymmetric nature of the lipid bilayer. The enzyme hydrolyzes lipids into fatty acids and hydrophilic groups. The phospholipase acts only on the outer layer of the membrane, while the inner layer remains intact. The phospholipase treatment resulted in 80%...
9.6K
Mechanisms of Membrane Domain Formation
3.8K
Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with...
Another mechanism for membrane domain formation involves membrane proteins interacting with...
3.8K
Phosphoinositides and PIPs
10.1K
Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
10.1K

