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Single-Molecule Analysis of Sf9 Purified Superprocessive Kinesin-3 Family Motors

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Published on: July 27, 2022

Tracking Single Kinesin in Live Cells Using MINFLUX.

Takahiro Deguchi¹, Nikolay Arkadievich Sergeev^1,2,3, Jonas Ries^4,5,6,7

¹European Molecular Biology Laboratory, Cell Biology and Biophysics, Heidelberg, Germany.

Methods in Molecular Biology (Clifton, N.J.)

|December 20, 2024

Summary

This summary is machine-generated.

MINFLUX microscopy allows tracking of single molecules in live cells with nanometer precision. This method details analyzing human kinesin-1 motor protein movement and stepping dynamics.

Keywords:

Conformational dynamics Fluorescence microscopy Kinesin MINFLUX Motor protein Single-molecule tracking Super-resolution

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Area of Science:

Biophysics
Cell Biology
Microscopy

Background:

Super-resolution microscopy is crucial for observing molecular mechanisms in cells.
MINFLUX (MInimal detection FLUX) microscopy offers unparalleled spatial and temporal resolution.
Kinesin motor proteins are essential for intracellular transport.

Purpose of the Study:

To describe a method for tracking fluorescently labeled human kinesin-1 in live cells.
To analyze the stepping dynamics of kinesin-1 using MINFLUX microscopy.

Main Methods:

Utilizing MINFLUX super-resolution fluorescence microscopy for single-molecule tracking.
Employing live-cell imaging techniques.
Analyzing the step size and velocity of kinesin-1 motors.

Main Results:

Achieved single-nanometer spatial resolution and sub-millisecond temporal resolution for kinesin-1 tracking.
Detailed analysis of kinesin-1 stepping patterns and dynamics in a cellular environment.

Conclusions:

MINFLUX microscopy is a powerful tool for dissecting motor protein function at the nanoscale.
The described method enables precise characterization of kinesin-1 transport dynamics in live cells.