EdU Incorporation for FACS and Microscopy Analysis of DNA Replication in Budding Yeast

Area of Science:

• Molecular Biology
• Cell Biology
• Genetics

Background:

• DNA replication is crucial for chromosome stability and segregation in eukaryotes.
• Studying DNA synthesis in Saccharomyces cerevisiae (yeast) is vital for cell cycle research.
• Quantifying DNA replication parameters like S phase fraction and subnuclear localization in yeast has been challenging.

Purpose of the Study:

• To establish a robust method for analyzing DNA replication in single yeast cells.
• To optimize the incorporation and detection of 5-ethynyl-2 '-deoxyuridine (EdU) in Saccharomyces cerevisiae.
• To enable precise measurement of DNA synthesis dynamics using flow cytometry and fluorescence microscopy.

Main Methods:

• Utilized a specific budding yeast strain and optimized conditions for rapid EdU incorporation.
• Employed copper-catalyzed azide alkyne cycloaddition (Click reaction) for EdU detection without DNA denaturation.
• Applied flow cytometry and fluorescence microscopy for single-cell analysis of DNA synthesis.

Main Results:

• Achieved rapid and efficient EdU incorporation in yeast at moderate extracellular concentrations.
• Demonstrated successful detection of incorporated EdU using the Click reaction.
• Enabled detailed analysis of DNA replication patterns in individual yeast cells.

Conclusions:

• The described method provides a simple yet powerful tool for studying DNA replication in yeast.
• This approach facilitates the analysis of key DNA synthesis parameters in single cells.
• The optimized EdU labeling and detection protocol enhances cell cycle research in Saccharomyces cerevisiae.