膜蛋白的四分制安排:一个水蛋白案例
1School of Agriculture, Food and Wine, and Waite Research Institute, Faculty of Sciences, Engineering and Technology, University of Adelaide, Glen Osmond, South Australia 5064, Australia.
Biochemical Society transactions
|December 13, 2024
概括
像水素这样的整体膜蛋白便于通过细胞膜进行运输. 本综述详细介绍了影响其组装和功能的因素,重点关注脂质双层内的水蛋白相互作用.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 膜生物物理学 膜生物物理学
背景情况:
- 综合膜蛋白,包括水蛋白,对于细胞运输和恒温至关重要.
- 已建立的模型将膜蛋白集成描述为一个两阶段的过程,涉及跨脂质双层的α-螺旋体形成.
- 蛋白质和脂质成分的结构性质显著影响功能性膜蛋白质复合体的组装.
研究的目的:
- 为管理膜载体的集成和寡合化因素提供最新的理解,特别关注水族.
- 详细阐述四聚体内单个水素单体之间的相互作用及其随后与模型膜中的脂质的相互作用.
- 突出先进技术的潜力,以未来研究膜蛋白组装.
主要方法:
- 审查关于膜蛋白结构,融合和功能的现有文献.
- 分析了详细介绍水素单体-单体和四体-脂质相互作用的研究.
- 讨论当前和新兴技术,包括单分子方法和冷电子断层扫描.
主要成果:
- 证据支持蛋白质结构和脂质环境在功能性膜蛋白组装中的关键作用.
- 详细了解细菌和哺乳动物水四分体中的特定相互作用及其脂质双层关联.
- 使用先进的成像和单分子技术,识别知识缺口和未来的研究方向.
结论:
- 了解水素组合和与脂质双层的相互作用是阐明它们功能的关键.
- 像冷电子断层扫描这样的先进技术为揭示膜蛋白四级结构的复杂性提供了有希望的途径.
- 膜蛋白研究的跨学科方法可以推动生物工程创新,以实现可持续的社会发展.
相关概念视频
01:25Aquaporins
4.8K
Aquaporins or AQPs are a family of integral membrane proteins whose primary function is to transport water, while some called aquaglyceroporins also transport glycerol. In addition, aquaporins have also been suspected to be involved in transporting volatile substances, such as carbon dioxide and ammonia, across membranes. Such AQPs that act as gas channels are often highly expressed in cells involved in the gaseous exchange, such as red blood cells, epithelial cells, and pulmonary capillaries.
4.8K
01:09Multi-pass Transmembrane Proteins and β-barrels
5.2K
In multi-pass transmembrane proteins, the polypeptide chain crosses the membrane more than once. The transmembrane polypeptide chain either forms an α-helix or β-strand structure. α-Helix containing multi-pass transmembrane proteins are ubiquitous, whereas β-strand containing ones are mainly found in gram-negative bacteria, mitochondria, and chloroplasts.
α-Helix containing multi-pass transmembrane proteins
Multi-pass transmembrane proteins such as...
α-Helix containing multi-pass transmembrane proteins
Multi-pass transmembrane proteins such as...
5.2K
01:19Fluid Mosaic Model
11.4K
Scientists identified the plasma membrane in the 1890s and its principal chemical components (lipids and proteins) by 1915. The model for plasma membrane structure, proposed in 1935 by Hugh Davson and James Danielli, was the first model to be widely accepted in the scientific community. The model was based on the plasma membrane's "railroad track" appearance in early electron micrographs. Davson and Danielli theorized that the plasma membrane's structure resembled a sandwich...
11.4K
00:59Mechanisms of Membrane Domain Formation
3.0K
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...
3.0K
01:30Membrane Proteins
17.9K
Plasma membranes have integral transmembrane proteins involved in facilitated transport. These proteins are collectively referred to as transport proteins, and they function as either channels for the material or as carriers themselves. Channel proteins have hydrophilic domains exposed to the intracellular and extracellular fluids and a hydrophilic channel through their core that provides a hydrated opening for solutes to pass through the membrane layers. Passage through the channel allows...
17.9K
01:17Pore Transport and Ion-Pair Transport
363
Pore transport and ion-pair formation are critical mechanisms for the absorption and distribution of drugs in the body.
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
363