超分子机械敏感通道是由化两旋风扇形成的
Kohei Sato1, Ryo Sasaki1, Ryoto Matsuda1
1School of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8501, Japan.
Journal of the American Chemical Society
|June 21, 2022
概括
研究人员创建了一种合成机械敏感通道,灵感来自于大自然. 这种新的离子通道在脂质膜中自我组装,并表现出对机械力敏感的选择性运输.
科学领域:
- 超分子化学 超分子化学
- 生物物理化学 生物物理化学
- 材料科学 材料科学 材料科学
背景情况:
- 机械敏感通道是调节细胞对机械刺激反应的关键生物成分.
- 现有的合成离子通道往往缺乏对机械力的敏感性或精确的离子选择性.
- 以自然为灵感的设计为新型功能生物材料提供了一条途径.
研究的目的:
- 开发一种模仿自然机械敏感通道的合成离子通道.
- 在脂质双层中研究一种新型旋的自我组装和离子运输特性.
- 探索合成通道的机械敏感性和离子选择性.
主要方法:
- 用水友链制造的化两旋风扇.
- 将其纳入脂质双层膜,并使用显微镜和光谱镜进行表征.
- 通过电流记录和pH敏感光测试进行离子运输测量.
- 全原子混合量子力学/分子力学模拟用于结构和机械洞察力.
主要成果:
- 旋风管自组装成脂质双层内的超分子跨膜离子通道.
- 实现了高效的跨膜离子传输,显示出显著的机械敏感性.
- 合成通道对离子具有选择性.
- 模拟提供了对通道结构和离子传输机制的原子层次理解.
结论:
- 这项研究介绍了第一个合成机械敏感通道.
- 这种人工通道为机械传感和离子传输应用提供了一个新的平台.
- 潜在的应用包括生物过程操纵和工业材料净化.
相关概念视频
Mechanically-gated Ion Channels
6.6K
Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
6.6K
Ligand-Gated Ion Channel Receptor: Gating Mechanism
2.6K
Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
2.6K
Voltage-gated Ion Channels
8.6K
Voltage-gated ion channels are transmembrane proteins that open and close in response to changes in the membrane potential. They are present on the membranes of all electrically excitable cells such as neurons, heart, and muscle cells.
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several...
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several...
8.6K
Non-gated Ion Channels
7.1K
Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism....
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism....
7.1K
Ligand-gated Ion Channels
12.7K
Ligand-gated ion channels are transmembrane proteins with a channel for ions to pass through and a binding site for a ligand. The channel opens only when a ligand attaches to the binding site.
Three Subfamilies of Ligand-gated Ion Channels
Ligand-gated ion channels fall into three subfamilies. The 'Cys-loop' includes the nicotinic acetylcholine receptors, γ-aminobutyric acid (GABA), glycine, and 5-hydroxytryptamine receptors. The second one is the 'Pore-loop' channels that...
Three Subfamilies of Ligand-gated Ion Channels
Ligand-gated ion channels fall into three subfamilies. The 'Cys-loop' includes the nicotinic acetylcholine receptors, γ-aminobutyric acid (GABA), glycine, and 5-hydroxytryptamine receptors. The second one is the 'Pore-loop' channels that...
12.7K
Pinching-off of Coated Vesicles
3.2K
Vesicle budding is orchestrated by distinct cytosolic proteins such as adaptor proteins, coat proteins, and GTPases. To initiate vesicle budding, membrane-bending proteins containing crescent-shaped BAR domains bind to the lipid heads in the bilayer and distort the membrane to form a protein-coated vesicle bud. Adaptors proteins such as AP2 for clathrin-coated vesicles can nucleate on the deformed membrane. Finally, coat proteins such as clathrin or COPI and COPII assemble into a coat forming...
3.2K


