Single Molecule Analysis

Volume 783 of the series Methods in Molecular Biology pp 139-158


Exploring Protein Superstructures and Dynamics in Live Bacterial Cells Using Single-Molecule and Superresolution Imaging

  • Julie S. BiteenAffiliated withDepartment of Chemistry, University of Michigan Email author 
  • , Lucy ShapiroAffiliated withDepartment of Developmental Biology, Stanford University
  • , W. E. MoernerAffiliated withDepartment of Chemistry, Stanford University

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Single-molecule imaging enables biophysical measurements devoid of ensemble averaging, gives enhanced spatial resolution beyond the optical diffraction limit, and enables superresolution reconstruction of structures beyond the diffraction limit. This work summarizes how single-molecule and superresolution imaging can be applied to the study of protein dynamics and superstructures in live Caulobacter crescentus cells to illustrate the power of these methods in bacterial imaging. Based on these techniques, the diffusion coefficient and dynamics of the histidine protein kinase PleC, the localization behavior of the polar protein PopZ, and the treadmilling behavior and protein superstructure of the structural protein MreB are investigated with sub-40-nm spatial resolution, all in live cells.

Key words

Single-molecule imaging Live-cell imaging Live-cell PALM Superresolution imaging Superlocalization Caulobacter crescentus