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Updated: May 21, 2026
08:39
Tracking Single Proteins in Lipid Bilayers Using Fluorescence Microscopy
Published on: December 12, 2025
A Guide to Tracking Single Membrane Proteins and Their Interactions in Supported Lipid Bilayers
Evan L Taylor1, Kumud Raj Poudel2, James A Brozik3
1Department of Chemistry, Washington State University, Pullman, WA, USA.
Methods in Molecular Biology (Clifton, N.J.)
|May 19, 2026
Summary
This guide details building a single-molecule microscope and creating biomimetic membranes for tracking protein dynamics. It covers protein incorporation and advanced data analysis techniques for single protein experiments.
Area of Science:
- Biophysics
- Biochemistry
- Materials Science
Background:
- Single-molecule microscopy is crucial for understanding protein dynamics in complex biological systems.
- Planar-supported biomimetic membranes offer a controlled environment for studying membrane proteins.
- Accurate experimental procedures and data analysis are vital for reliable single-molecule studies.
Purpose of the Study:
- To provide a comprehensive guide for constructing a single-molecule microscope.
- To detail methods for creating various planar-supported biomimetic membranes.
- To outline procedures for incorporating transmembrane proteins and analyzing single-molecule tracking data.
Main Methods:
- Construction of a single-molecule microscope with detailed parts list, temperature control, alignment, calibration, and stability measurements.
- Preparation of diverse planar-supported lipid bilayers, including POPC, PEG-PE cushioned, BSA passivated, and endoplasmic reticulum (ER) biomimetic membranes.
- Incorporation of transmembrane proteins like 5HT3A serotonin receptor and cytochrome P450 enzymes using detergent-mediated or detergent-free methods.
Main Results:
- Detailed protocols for microscope construction and biomimetic membrane fabrication are presented.
- Successful incorporation methods for specific transmembrane proteins (5HT3A, CPR, P450) into ER biomimetics are described.
- A suite of data analysis techniques, including MSD, diffusion coefficient analysis, and equilibrium constant determination, are outlined.
Conclusions:
- This chapter serves as a practical resource for researchers performing single-molecule tracking experiments.
- The described methods enable the study of protein behavior in well-defined biomimetic environments.
- The provided data analysis framework supports quantitative interpretation of single protein dynamics.
Keywords:
Activation energiesArrhenius analysisBiomimeticIn vitro protein studiesIntegral membrane proteinPeripheral membrane proteinProtein diffusionSingle molecule instrument designSingle molecule microscopySingle molecule trackingTransmembrane proteinMore Related Videos
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