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Protein Dynamics in Living Cells

Protein Dynamics in Living Cells

Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...

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Related Experiment Video

Updated: Sep 12, 2025

Author Spotlight: Evaluation of Protein-Condensate Dynamics in Live Human Cells

Author Spotlight: Evaluation of Protein-Condensate Dynamics in Live Human Cells

Published on: January 5, 2024

Protocol for characterizing biomolecular condensates through live-cell imaging and analysis.

Grant Richter¹, Cindy Maurel¹, Alison Hogan¹

¹Faculty of Medicine, Health & Human Sciences, Macquarie Medical School, MND Research Centre, Macquarie University, Sydney, NSW 2109, Australia.

|August 8, 2025

Summary

This study details a confocal microscopy protocol for characterizing biomolecular condensates. The method analyzes localization, mobility, and dynamics, aiding research in diseases and drug delivery.

Keywords:

Cell Biology Cell-based Assays Microscopy

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Last Updated: Sep 12, 2025

Author Spotlight: Evaluation of Protein-Condensate Dynamics in Live Human Cells

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Area of Science:

Cell Biology
Biophysics
Microscopy

Background:

Biomolecular condensates are crucial for cellular functions.
Dysregulation of these condensates is implicated in diseases like cancer and neurodegeneration.
They are also explored for drug delivery applications.

Purpose of the Study:

To present a comprehensive protocol for characterizing biomolecular condensates.
To enable detailed analysis of condensate behavior using confocal microscopy.
To provide optimized methods for image acquisition and data analysis.

Main Methods:

Utilized three confocal microscopy modalities: subcellular localization, FRAP, and time-lapse analysis.
Developed optimized image acquisition parameters for high-quality data.
Employed ImageJ macros and plugins for 2D and 3D analysis workflows.

Main Results:

Established a robust protocol for quantifying biomolecular condensate properties.
Demonstrated the utility of FRAP and time-lapse imaging for assessing condensate dynamics.
Provided a framework for detailed spatial and temporal analysis of condensates.

Conclusions:

The presented protocol offers a standardized approach for biomolecular condensate characterization.
This methodology facilitates deeper understanding of condensate roles in health and disease.
The protocol supports advancements in fields ranging from cell biology to therapeutic development.