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Related Experiment Video

Updated: Jul 6, 2026

Visualizing Clathrin-mediated Endocytosis of G Protein-coupled Receptors at Single-event Resolution via TIRF Microscopy
12:40

Visualizing Clathrin-mediated Endocytosis of G Protein-coupled Receptors at Single-event Resolution via TIRF Microscopy

Published on: October 20, 2014

Visualizing clathrin-mediated IgE receptor internalization by electron and atomic force microscopy.

Alan R Burns1, Janet M Oliver, Janet R Pfeiffer

  • 1Biomolecular Interfaces and Systems Department, Sandia National Laboratories, Albuquerque, NM, USA.

Methods in Molecular Biology (Clifton, N.J.)
|March 29, 2008
PubMed
Summary
This summary is machine-generated.

Researchers visualized immunoglobulin E (IgE) receptor signaling in mast cells using advanced microscopy. This study details methods for imaging clathrin-mediated receptor internalization in native cell membrane sheets.

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Detection of Ligand-activated G Protein-coupled Receptor Internalization by Confocal Microscopy

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Area of Science:

  • Cell biology
  • Immunology
  • Biophysics

Background:

  • Immunoglobulin E (IgE) receptor signaling is crucial in mast cell activation and allergic responses.
  • Receptor internalization via clathrin-coated vesicles is a key step in this signaling pathway.
  • Understanding this process requires high-resolution visualization of molecular interactions at the cell membrane.

Purpose of the Study:

  • To describe a method for preparing native cell membrane sheets for high-resolution imaging.
  • To detail techniques for labeling and visualizing IgE receptors and clathrin structures.
  • To enable the study of clathrin-mediated IgE receptor internalization in mast cells.

Main Methods:

  • Preparation of fixed, native cell membrane sheets from mast cells.
  • Immunogold or fluorescent labeling of IgE receptors and associated signaling proteins.
  • High-resolution imaging using transmission electron microscopy (TEM).
  • Atomic force microscopy (AFM) combined with fluorescence imaging for detailed surface characterization.

Main Results:

  • Successful visualization of clathrin lattice structures containing IgE receptors in native membrane sheets.
  • Demonstration of IgE receptor and signaling partner co-localization within these structures.
  • Characterization of membrane dynamics using AFM and fluorescence imaging.

Conclusions:

  • The described methodology allows for detailed structural and dynamic analysis of clathrin-mediated endocytosis.
  • This approach provides insights into the early events of IgE receptor signaling in mast cells.
  • Advanced microscopy techniques are powerful tools for studying complex cellular processes at the molecular level.