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関連する概念動画

Membrane Fluidity01:26

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...
14.5K
Membrane Fluidity01:23

Membrane Fluidity

172.6K
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.
172.6K
Mechanisms of Membrane Domain Formation00:59

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...
3.8K
Asymmetric Lipid Bilayer01:35

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-bending01:15

Mechanisms of Membrane-bending

3.3K
The living membranes are flexible due to their fluid mosaic nature; however, their bending into different shapes is an active process regulated by specific lipids and proteins. The membrane bending can be transient as seen in vesicles or stable for a long time as in microvilli. Cells regulate the size, location, and duration of the membrane curvature.
Membrane bending can happen due to intrinsic changes in lipid composition or extrinsic association with different proteins. The proteins involved...
3.3K
Fluid Mosaic Model01:19

Fluid Mosaic Model

15.6K
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...
15.6K

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関連する実験動画

Updated: Jan 14, 2026

Automated Lipid Bilayer Membrane Formation Using a Polydimethylsiloxane Thin Film
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Automated Lipid Bilayer Membrane Formation Using a Polydimethylsiloxane Thin Film

Published on: July 10, 2016

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制御可能な横向行動を持つオープンリピドナノ膜を構成する

Guizhi Dong1,2, Jiafang Piao1,2, Wei Yuan1,2

  • 1CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

Journal of the American Chemical Society
|October 21, 2025
PubMed
まとめ

研究者は,膜タンパク質の研究を精密に制御するためにDNAナノバレルを使用して,オープンな脂質膜を開発しました. 制御された膜融合と 強化されたタンパク質の相互作用を可能にします

さらに関連する動画

Self-Assembly of Hybrid Lipid Membranes Doped with Hydrophobic Organic Molecules at the Water/Air Interface
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Self-Assembly of Hybrid Lipid Membranes Doped with Hydrophobic Organic Molecules at the Water/Air Interface

Published on: May 1, 2020

4.0K
Ligand Nano-cluster Arrays in a Supported Lipid Bilayer
10:34

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer

Published on: April 23, 2017

7.3K

関連する実験動画

Last Updated: Jan 14, 2026

Automated Lipid Bilayer Membrane Formation Using a Polydimethylsiloxane Thin Film
08:23

Automated Lipid Bilayer Membrane Formation Using a Polydimethylsiloxane Thin Film

Published on: July 10, 2016

19.0K
Self-Assembly of Hybrid Lipid Membranes Doped with Hydrophobic Organic Molecules at the Water/Air Interface
06:28

Self-Assembly of Hybrid Lipid Membranes Doped with Hydrophobic Organic Molecules at the Water/Air Interface

Published on: May 1, 2020

4.0K
Ligand Nano-cluster Arrays in a Supported Lipid Bilayer
10:34

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer

Published on: April 23, 2017

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科学分野:

  • 生化学と生体物理学
  • ナノテクノロジー
  • 分子生物学

背景:

  • 脂質二層の正確な制御は,膜タンパク質の行動を研究するために不可欠です.
  • 脂質のダイナミックでアンフィフィリックな性質は,安定した制御可能な膜環境を創造する上で課題を提示します.

研究 の 目的:

  • プログラム可能な幾何学と流動性を持つオープン脂質膜の構築のための普遍的な戦略を開発する.
  • 制御された膜融合を可能にし,膜に関連したタンパク質機能への影響を調査する.

主な方法:

  • DNAオリガミを使って オープンなDNAナノバレルを 脂質二層に閉じ込めました
  • コレステロールの分布と脂質の比率が最適化され,膜の安定性が向上する.
  • 空間的に定義された膜融合のための設計されたDNA相互作用と形状マッチング機能.

主要な成果:

  • プログラム可能な幾何学と横流性を持つ安定したオープン脂質膜を証明した.
  • 空間的に定義された膜融合を達成し,コンパートメントの間の脂質拡散を可能にします.
  • 膜関連タンパク質の近接により 強化された閉じ込められた酵素反応が観察された.

結論:

  • 開発されたDNAナノバレルプラットフォームは,膜タンパク質の組織とダイナミクスを研究するための汎用的なシステムを提供します.
  • このアプローチは,制御された脂質環境における膜タンパク質の機能的調整の調査を容易にする.
  • 膜内タンパク質の行動と相互作用を理解するための新しい方法を提供します.