Expression, Purification, and In Vitro Analysis of Myosin.

Methods Mol Biol

Astbury Centre for Structural and Molecular Biology, University of Leeds, Leeds, UK.

Published: December 2024

AI Article Synopsis

  • The chapter explains the process of expressing and purifying myosin, a type of cytoskeletal molecular motor, using an insect cell system.
  • It details methods for characterizing the quality of the purified myosin through techniques like mass photometry and negative-stain electron microscopy (EM).
  • Lastly, it describes how to conduct in vitro assays to observe how fluorescently labeled myosin moves along actin tracks and mentions adapting these assays for MINFLUX imaging.

Article Abstract

To understand the mechanics and kinetic properties of cytoskeletal molecular motors such as myosin, typically the motor of interest needs to be expressed and purified and then analyzed using a range of in vitro-based assays. In this chapter, we describe how to express and purify myosin using the insect cell system, how to characterize the purified protein by mass photometry and negative-stain EM to assess its quality, and how to perform in vitro assays in which fluorescently labeled myosin walks along actin tracks, including a brief description of adapting these assays for MINFLUX imaging.

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http://dx.doi.org/10.1007/978-1-0716-4280-1_9DOI Listing

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