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Related Concept Videos

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.
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Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

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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...
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Asymmetric Lipid Bilayer01:35

Asymmetric Lipid Bilayer

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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...
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Fluid Mosaic Model01:19

Fluid Mosaic Model

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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...
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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

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Construct Open Lipid Nano-Membranes with Controllable Lateral Behavior.

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
Summary
This summary is machine-generated.

Researchers developed open lipid membranes using DNA nanobarrels for precise control over membrane protein studies. This DNA origami platform enables controlled membrane fusion and enhanced protein interactions.

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Area of Science:

  • Biochemistry and Biophysics
  • Nanotechnology
  • Molecular Biology

Background:

  • Precise control over lipid bilayers is crucial for studying membrane protein behavior.
  • The dynamic and amphiphilic nature of lipids presents challenges in creating stable, controllable membrane environments.

Purpose of the Study:

  • To develop a universal strategy for constructing open lipid membranes with programmable geometry and fluidity.
  • To enable controlled membrane fusion and investigate its impact on membrane-associated protein functions.

Main Methods:

  • Utilized DNA origami to create open DNA nanobarrels confining lipid bilayers.
  • Optimized cholesterol distribution and lipid ratios for enhanced membrane stability.
  • Engineered DNA interactions and shape-matching features for spatially defined membrane fusion.

Main Results:

  • Demonstrated stable open lipid membranes with programmable geometry and lateral fluidity.
  • Achieved spatially defined membrane fusion, allowing lipid diffusion across compartments.
  • Observed enhanced confined enzymatic reactions due to proximity of membrane-associated proteins.

Conclusions:

  • The developed DNA nanobarrel platform offers a versatile system for studying membrane protein organization and dynamics.
  • This approach facilitates investigation of functional coordination of membrane proteins in controlled lipid environments.
  • Provides new avenues for understanding in-membrane protein behaviors and interactions.