Cell cycle analysis of yeasts.

Area of Science:

• Microbiology
• Molecular Biology
• Cell Biology

Background:

• Standard flow cytometry protocols for mammalian cell cycle analysis are often inadequate for yeast.
• High coefficients of variation (CVs) in DNA content measurement hinder accurate cell cycle phase quantification in yeasts.

Purpose of the Study:

• To develop a high-resolution DNA staining procedure for accurate cell cycle analysis in yeasts.
• To improve the quantification of cell cycle phases in yeast populations.

Main Methods:

• Utilized the nucleic acid stain SYBR Green I for yeast DNA staining.
• Optimized sample processing techniques in conjunction with SYBR Green I.
• Employed flow cytometry for DNA content analysis.

Main Results:

• Achieved high-resolution DNA analysis in yeasts with low half-peak CVs (around 3-4%).
• SYBR Green I demonstrated high selectivity for double-stranded DNA and a high fluorescence quantum yield.
• Enabled clear-cut identification of the S phase in yeast cell cycle analysis.

Conclusions:

• The optimized SYBR Green I staining protocol provides accurate and high-resolution DNA content measurement in yeasts.
• This method significantly improves the ability to quantify cell cycle phases, including the S phase, in yeast.
• The protocol offers a superior alternative to existing methods for yeast cell cycle studies.