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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...

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Related Experiment Video

Updated: Jul 8, 2026

Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy
10:49

Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy

Published on: March 5, 2017

Exploring membrane domains using native membrane sheets and transmission electron microscopy.

Bridget S Wilson1, Janet R Pfeiffer, Mary Ann Raymond-Stintz

  • 1Dept. of Pathology and Cancer Center, University of New Mexico School of Medicine, Albuquerque, USA.

Methods in Molecular Biology (Clifton, N.J.)
|January 25, 2008
PubMed
Summary
This summary is machine-generated.

Researchers mapped cell surface receptor remodeling using gold nanoprobes and electron microscopy. This reveals how cell signaling networks change during cell activation, providing insights into cellular communication.

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Area of Science:

  • Cell Biology
  • Biophysics
  • Nanotechnology

Background:

  • Cellular information flow relies on dynamic remodeling of signaling and trafficking networks.
  • Understanding receptor activation events is crucial for deciphering cell communication.

Purpose of the Study:

  • To develop and apply a high-resolution imaging technique for observing cell surface receptor remodeling.
  • To analyze the spatial distribution of receptors, signaling proteins, and lipids during cell activation.

Main Methods:

  • Cells were sandwiched between glass coverslips and electron microscopy grids, then ripped to create membrane sheets.
  • Membrane sheets were labeled with functionalized colloidal gold nanoprobes (3-10 nm) targeting specific molecules.
  • Transmission electron microscopy was used to image nanoprobes, and their coordinates were analyzed in relation to membrane features.

Main Results:

  • High-resolution topographical maps of native cell membranes were generated.
  • The distribution of nanoprobes (marking receptors, signaling proteins, lipids) was analyzed.
  • Probe distributions were correlated with membrane structures such as clathrin-coated pits and caveolae.

Conclusions:

  • The developed technology enables detailed visualization of molecular organization in native cell membranes.
  • Analysis of nanoprobes provides insights into the remodeling of cell signaling and trafficking networks.
  • This approach facilitates the study of dynamic cellular processes at the nanoscale.