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Related Concept Videos

Yeast Signaling01:28

Yeast Signaling

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Yeasts are single-celled organisms, but unlike bacteria, they are eukaryotes (cells with a nucleus). Cell signaling in yeast is similar to signaling in other eukaryotic cells. A ligand, such as a protein or a small molecule released from a yeast cell, attaches to a receptor on the cell surface. The binding stimulates second-messenger kinases to activate or inactivate transcription factors that further regulate gene expression. Many of the yeast intracellular signaling cascades have similar...
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Temporal Quantification of MAPK Induced Expression in Single Yeast Cells
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Temporal quantification of MAPK induced expression in single yeast cells.

Serge Pelet1, Delphine Aymoz, Eric Durandau

  • 1Department of Fundamental Microbiology, University of Lausanne.

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|October 15, 2013
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Summary

Single-cell gene expression analysis reveals hidden regulatory processes. Microscopy and flow cytometry offer complementary approaches for studying protein dynamics and pathway regulation in yeast.

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Systems Biology

Background:

  • Traditional population-level measurements obscure crucial regulatory mechanisms.
  • Single-cell quantification provides higher resolution for biological insights.
  • Understanding signaling pathways requires precise measurement of gene expression dynamics.

Purpose of the Study:

  • To present microscopy and flow cytometry methods for single-cell gene expression analysis.
  • To demonstrate the application of these methods using a yeast MAPK pathway reporter.
  • To highlight the distinct advantages of each technique for studying cellular regulation.

Main Methods:

  • Flow cytometry for high-throughput analysis of protein expression dynamics.
  • Microscopy for rich spatial and temporal data from individual cells.
  • Utilizing a fluorescent reporter for the high osmolarity glycerol MAPK pathway in yeast.

Main Results:

  • Flow cytometry quantifies protein dynamics directly, bypassing reporter maturation time.
  • Microscopy yields detailed information on reporter maturation and localization in fewer cells.
  • Both methods provide valuable, yet distinct, data on gene expression regulation.

Conclusions:

  • Combining flow cytometry and microscopy enhances understanding of signaling pathway regulation.
  • Single-cell approaches are essential for uncovering complex biological mechanisms.
  • These methods offer powerful tools for systems biology research.