Visualizing mRNAs in fixed and living yeast cells.

Area of Science:

• Cell Biology
• Molecular Biology
• Genetics

Background:

• Messenger RNA (mRNA) localization regulates protein function in eukaryotes.
• Understanding mRNA positioning is crucial for cellular processes like motility and division.
• Yeast Saccharomyces cerevisiae serves as a model organism for studying fundamental cellular mechanisms.

Purpose of the Study:

• To present robust methods for visualizing mRNA in both fixed and living yeast cells.
• To enable precise determination of intracellular mRNA position and dynamics.
• To provide detailed protocols and technical considerations for mRNA visualization techniques.

Main Methods:

• Fluorescent In Situ Hybridization (FISH) for detecting specific mRNA targets in fixed cells.
• MS2 stem-loop system with MS2 RNA-binding protein fused to a fluorescent protein for live cell imaging of mRNA dynamics.
• In vivo reconstitution of fluorescent ribonucleoparticles for tracking tagged mRNAs.

Main Results:

• FISH allows accurate assessment of mRNA position in fixed yeast.
• The MS2 system enables real-time monitoring of mRNA dynamics in living yeast.
• Combined methods offer comprehensive tools for studying mRNA localization and movement.

Conclusions:

• The presented FISH and MS2-based methods are highly effective for visualizing mRNA in yeast.
• These techniques provide robust tools for investigating the spatio-temporal regulation of gene expression.
• Accurate mRNA localization data aids in understanding cellular functions regulated by protein distribution.