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Related Concept Videos

Membrane Domains01:18

Membrane Domains

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 anterior...
Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

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 cytoskeletal...
Membrane Fluidity01:26

Membrane Fluidity

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 a relatively...
Membrane Fluidity01:23

Membrane Fluidity

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.Fatty acids tails of phospholipids can be either saturated or...
Asymmetric Lipid Bilayer01:35

Asymmetric Lipid Bilayer

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%...
Fluid Mosaic Model01:19

Fluid Mosaic Model

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 with the analogy of...

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Related Experiment Video

Updated: Jul 7, 2026

Lipid Exchange Assay in Living Cells
08:59

Lipid Exchange Assay in Living Cells

Published on: March 21, 2025

Update on lipid membrane microdomains.

Gerd Schmitz1, Margot Grandl

  • 1Institute for Clinical Chemistry and Laboratory Medicine, University of Regensburg, Regensburg, Germany. gerd.schmitz@klinik.uni-regensburg.de

Current Opinion in Clinical Nutrition and Metabolic Care
|February 28, 2008
PubMed
Summary
This summary is machine-generated.

Lipid membrane microdomains are crucial in many diseases. Diet and drugs can alter their clustering, offering new therapeutic targets for conditions like metabolic syndrome and cancer.

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Lipid-Protein Membrane Structure-Function Characterization using Droplet Interface Bilayers
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Lipid-Protein Membrane Structure-Function Characterization using Droplet Interface Bilayers

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Single-Molecule Imaging of Lateral Mobility and Ion Channel Activity in Lipid Bilayers using Total Internal Reflection Fluorescence (TIRF) Microscopy
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Single-Molecule Imaging of Lateral Mobility and Ion Channel Activity in Lipid Bilayers using Total Internal Reflection Fluorescence (TIRF) Microscopy

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Related Experiment Videos

Last Updated: Jul 7, 2026

Lipid Exchange Assay in Living Cells
08:59

Lipid Exchange Assay in Living Cells

Published on: March 21, 2025

Lipid-Protein Membrane Structure-Function Characterization using Droplet Interface Bilayers
10:27

Lipid-Protein Membrane Structure-Function Characterization using Droplet Interface Bilayers

Published on: June 12, 2026

Single-Molecule Imaging of Lateral Mobility and Ion Channel Activity in Lipid Bilayers using Total Internal Reflection Fluorescence (TIRF) Microscopy
08:55

Single-Molecule Imaging of Lateral Mobility and Ion Channel Activity in Lipid Bilayers using Total Internal Reflection Fluorescence (TIRF) Microscopy

Published on: February 17, 2023

Area of Science:

  • Cell Biology
  • Biochemistry
  • Pathophysiology

Background:

  • Lipid membrane microdomains are dynamic cell membrane assemblies involved in critical cellular functions.
  • Abnormalities in these microdomains are implicated in a wide spectrum of diseases, including cancer, metabolic disorders, and neurodegeneration.

Purpose of the Study:

  • To provide an updated review of membrane microdomain abnormalities.
  • To highlight the role of microdomains in disease pathogenesis.
  • To identify potential therapeutic targets.

Main Methods:

  • This review synthesizes current research on lipid membrane microdomains.
  • Focuses on their dynamic nature, clustering mechanisms, and role in disease.
  • Examines the impact of dietary lipids and pharmacological agents.

Main Results:

  • Lipid membrane microdomains dynamically cluster sphingolipids, cholesterol, and proteins, forming functional platforms.
  • This clustering is essential for membrane trafficking, cell polarization, and signaling.
  • Dietary lipids and pharmacological agents can modify microdomain clustering.

Conclusions:

  • Metabolic overload, particularly from high-cholesterol/fat diets, can lead to persistent microdomain signaling and disrupted vesicular traffic.
  • Detailed molecular-level characterization of microdomains is essential for developing new therapeutic strategies.
  • Identifying novel dietary and pharmacological targets is key for preventing and treating microdomain-related diseases.