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Combining Structure-Function and Single-Molecule Studies on Cytoplasmic Dynein.

Lu Rao1, Maren Hülsemann1, Arne Gennerich2

  • 1Department of Anatomy and Structural Biology and Gruss-Lipper Biophotonics Center, Albert Einstein College of Medicine, Jack and Pearl Resnick Campus, 1300 Morris Park Avenue, Bronx, NY, 10461, USA.

Methods in Molecular Biology (Clifton, N.J.)
|September 24, 2017
PubMed
Summary

This study refines methods for studying cytoplasmic dynein, a key motor protein. Improved protocols for dynein mutants and microtubule attachment accelerate molecular mechanism research.

Keywords:
Cytoplasmic dyneinFluorescence labelingMicrotubule immobilizationMicrotubule motor proteinsMicrotubulesOptical trappingOptical tweezersRecombinant proteinsSingle-molecule assaysYeast gene manipulation

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biophysics

Background:

  • Cytoplasmic dynein is a large, complex motor protein essential for numerous cellular processes.
  • Recent advances in recombinant expression and single-molecule techniques have improved understanding of dynein's function.
  • Structure-function and single-molecule studies are crucial for elucidating dynein's molecular mechanisms.

Purpose of the Study:

  • To provide optimized protocols for generating and purifying dynein mutants and tagged proteins using the S. cerevisiae system.
  • To present updated, user-friendly protocols for attaching microtubules to coverslip surfaces for single-molecule assays.
  • To facilitate hypothesis-driven mutagenesis and structure-function studies of dynein.

Main Methods:

  • Utilizing the S. cerevisiae expression system for protein generation.
  • Employing single-molecule fluorescence assays and optical tweezers.
  • Developing improved protocols for protein expression, purification, and microtubule surface attachment.

Main Results:

  • Established improved protocols for generating dynein mutants and expressing/purifying mutated/tagged proteins.
  • Developed updated, easy-to-use protocols for attaching microtubules to coverslip surfaces.
  • The new protocols simplify and accelerate dynein research.

Conclusions:

  • The presented protocols enhance the study of cytoplasmic dynein's molecular mechanisms.
  • Integration of these protocols with recent structural data will accelerate future research.
  • This work supports continued investigation into dynein's diverse biological roles.