Imaging real-time gene expression in living yeast

Area of Science:

• Molecular Biology
• Cell Biology
• Genetics

Background:

• Understanding mRNA localization is crucial for cell development.
• The MS2 system provides a powerful tool for visualizing specific RNA molecules in vivo.
• Previous studies have highlighted the importance of ASH1 mRNA in yeast cell polarity.

Purpose of the Study:

• To detail a protocol for applying the MS2 system to Saccharomyces cerevisiae.
• To visualize and track the localization of ASH1 mRNA within live yeast cells.
• To demonstrate the utility of MS2-tagged RNA for studying subcellular mRNA transport.

Main Methods:

• Utilized the MS2 system with six MS2 repeats (6MBSs) to tag ASH1 mRNA.
• Transformed W303 yeast cells with plasmids for MS2-GFP and MS2-ASH1 expression.
• Grew yeast on selective media and induced RNA expression using galactose.
• Acquired time-lapse movies to observe mRNA particle localization.

Main Results:

• Successfully visualized the localization of ASH1 mRNA particles in Saccharomyces cerevisiae.
• Demonstrated the movement of ASH1 mRNA to the bud tip of haploid yeast cells.
• The MS2 system enabled real-time tracking of specific mRNA dynamics.

Conclusions:

• The described MS2 system protocol is effective for studying mRNA localization in yeast.
• ASH1 mRNA localization to the bud tip is observable using this technique.
• This method facilitates the investigation of RNA transport mechanisms in cellular processes.