Related Experiment Video
Updated: Jun 4, 2025
08:57
Myosin-Specific Adaptations of In vitro Fluorescence Microscopy-Based Motility Assays
Published on: February 4, 2021
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Expression, Purification, and In Vitro Analysis of Myosin
Glenn Carrington1,2, Yasuharu Takagi3,4, Oliver Umney1,2,4
1Astbury Centre for Structural and Molecular Biology, University of Leeds, Leeds, UK.
Methods in Molecular Biology (Clifton, N.J.)
|December 20, 2024
Summary
This chapter details expressing and purifying myosin motor proteins using insect cells. It covers quality assessment and in vitro actin-binding assays, adaptable for advanced MINFLUX imaging.
Area of Science:
- Biochemistry
- Molecular Biology
- Cell Biology
Background:
- Understanding cytoskeletal molecular motors like myosin is crucial for cell mechanics.
- Traditional methods involve protein expression, purification, and in vitro assays.
Purpose of the Study:
- To provide a comprehensive protocol for myosin expression and purification.
- To detail methods for characterizing myosin quality.
- To describe in vitro actin-binding assays and their adaptation for MINFLUX imaging.
Main Methods:
- Myosin expression and purification using an insect cell system.
- Quality control of purified myosin via mass photometry and negative-stain electron microscopy (EM).
- In vitro motility assays with fluorescently labeled myosin and actin tracks, including MINFLUX adaptation.
Main Results:
- A reproducible protocol for obtaining high-quality, purified myosin.
- Successful characterization of myosin using biophysical techniques.
- Demonstration of in vitro actin-based motility assays.
Conclusions:
- The described methods enable robust study of myosin mechanics and kinetics.
- The protocol facilitates adaptation for super-resolution imaging techniques like MINFLUX.
- This work provides a valuable resource for researchers studying cytoskeletal motor proteins.
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