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Related Concept Videos

Membrane Domains01:18

Membrane Domains

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The membrane domains concentrate specific lipids and proteins at one place within the membrane, which helps in cell signaling, adhesion, and other critical cellular processes. These domains can differ in size, composition, function, and lifespan.
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the...
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Mechanisms of Membrane Domain Formation00:59

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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.
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Related Experiment Video

Updated: Jun 21, 2025

Lipid Vesicle-mediated Affinity Chromatography using Magnetic Activated Cell Sorting LIMACS: a Novel Method to Analyze Protein-lipid Interaction
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Using lipid binding proteins and advanced microscopy to study lipid domains.

Nario Tomishige1, Kohta Takahashi1, Brigitte Pollet1

  • 1Université de Strasbourg, Illkirch, France.

Methods in Enzymology
|July 6, 2024
PubMed
Summary
This summary is machine-generated.

This study details methods for visualizing and characterizing sphingomyelin-rich lipid domains in cell membranes using advanced microscopy. It compares techniques for both plasma and intracellular membranes.

Keywords:
CholesterolFLIM-FRETLipid probeSphingomyelin

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Microscopy

Background:

  • Sphingomyelin and cholesterol form submicron lipid domains in biomembranes via hydrophobic interactions and hydrogen bonds.
  • These lipid domains are crucial for various cellular functions.
  • Visualizing these small domains requires advanced microscopy and specific lipid-binding proteins.

Purpose of the Study:

  • To describe methods for characterizing sphingomyelin-rich and cholesterol-rich lipid domains in plasma membranes using quantitative microscopy.
  • To compare different permeabilization techniques for visualizing intracellular lipid domains.

Main Methods:

  • Quantitative microscopy techniques are employed to analyze lipid domains.
  • Specific proteins that bind sphingomyelin and/or cholesterol are utilized as probes.
  • Comparison of various permeabilization methods for intracellular domain visualization.

Main Results:

  • The study provides a detailed method for characterizing plasma membrane lipid domains.
  • Different permeabilization strategies show varying effectiveness for intracellular lipid domain visualization.
  • Successful visualization of submicron lipid domains is achieved.

Conclusions:

  • Quantitative microscopy combined with lipid-binding proteins enables the characterization of sphingomyelin-rich and cholesterol-rich lipid domains.
  • The choice of permeabilization method is critical for visualizing intracellular lipid domains.
  • This work contributes to understanding lipid domain organization and function in cell membranes.