膜蛋白水化桥梁 聚合物物理和生物学
C Swathi K Menon1, Thomas Huber2, Lauren E Thaller1
1Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona.
Biophysical journal
|September 19, 2025
概括
了解膜蛋白水合是细胞过程的关键. 计算方法,如混合蒙特卡洛/分子动力学模拟,提供了对蛋白质结构和功能的原子洞察力,以 rhodopsin 为模型.
科学领域:
- 生物物理学的生物物理.
- 计算生物学 计算生物学
- 聚合物物理 聚合物物理
背景情况:
- 水在膜蛋白结构和功能中的作用对细胞过程至关重要.
- 聚合物透效应对于研究膜蛋白激活很重要,正如罗多普辛研究所显示的那样.
- 对膜蛋白水合的机械洞察需要原子分解,涉及脂质和聚合物.
研究的目的:
- 审查膜蛋白水合作为一个多学科主题在聚合物物理和生物学的交叉点.
- 探索聚合物物理化学和膜蛋白水合之间的协同作用.
- 突出了研究膜蛋白水合的计算方法的需要.
主要方法:
- 对蛋白质水合的光谱和结构方法的最新进展和挑战的审查.
- 探索聚合物物理化学的贡献 (格子模型,氧化物,拥挤).
- 讨论混合蒙特卡洛/分子动力学模拟用于膜蛋白水合.
主要成果:
- 分子动力学模拟的最新进展使得捕获膜蛋白水合的原子细节成为可能.
- 证明了聚合物物理化学和膜蛋白水合之间的协同作用.
- 混合模拟为罗多素水合提供了新的见解.
结论:
- 计算方法,特别是混合的蒙特卡洛/分子动力学,对于理解膜蛋白在原子分辨率下水是必不可少的.
- Rhodospsin作为一种有价值的模型,用于研究膜蛋白中的水化效应.
- 结合聚合物物理和计算生物学的进一步研究将推动该领域的发展.
相关概念视频
Fluid Mosaic Model
15.7K
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...
15.7K
Multi-pass Transmembrane Proteins and β-barrels
6.4K
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...
6.4K
Aquaporins
6.1K
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.
6.1K
Single-pass Transmembrane Proteins
6.5K
Integral membrane proteins are tightly associated with the cell membrane and play a crucial role in cell communication, signaling, adhesion, and transport of the molecules. Some integral membrane proteins are present only in the membrane monolayer. For example, the enzyme fatty acid amide hydrolase is present in the cytoplasmic side of the membrane monolayer. In contrast, another type of integral membrane protein, also known as a transmembrane protein, spans across the membrane. Transmembrane...
6.5K
Membrane Fluidity
14.5K
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...
14.5K
Membrane Fluidity
173.1K
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.
173.1K


