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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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Optimized sample preparation for single-molecule localization-based superresolution microscopy in yeast.

Charlotte Kaplan1, Helge Ewers2

  • 1Institute of Biochemistry, ETH Zurich, Zurich, Switzerland.

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This summary is machine-generated.

This study presents an optimized protocol for superresolution microscopy in yeast, improving structural preservation using nanobodies and enzymatic labeling for high-resolution imaging of cellular structures.

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Area of Science:

  • Cell Biology
  • Microscopy
  • Biochemistry

Background:

  • Single-molecule localization microscopy (SMLM) offers nanoscale resolution but faces challenges with structural preservation in yeast.
  • Current yeast labeling protocols hinder SMLM due to issues with maintaining cellular integrity.

Purpose of the Study:

  • To develop an optimized sample preparation protocol for high-resolution SMLM in Saccharomyces cerevisiae.
  • To enhance structural preservation during superresolution imaging of yeast cells.

Main Methods:

  • Utilized nanobodies as small binders for efficient dye delivery.
  • Employed an enzymatic labeling strategy to target proteins with organic dyes.
  • Optimized sample preparation to avoid yeast cell wall degradation.

Main Results:

  • Achieved high-resolution SMLM with improved structural preservation in yeast.
  • Nanobodies facilitated dye penetration without compromising cell structure.
  • Reduced localization error due to the proximity of dyes to target proteins.

Conclusions:

  • The developed protocol enables advanced superresolution imaging in yeast.
  • This method offers a faster (2-4 hours) and more effective approach for yeast cell preparation.
  • Requires expertise in yeast molecular biology, immunolabeling, and access to SMLM equipment.