FISHing on a Budget.

Area of Science:

• Molecular Biology
• Cell Biology
• Genetics

Background:

• Quantitative gene expression analysis in single cells often relies on sensitive RNA detection methods.
• Traditional fluorescence in situ hybridization (FISH) techniques can be costly and labor-intensive.
• Existing methods may not be optimal for analyzing short RNA targets or specific molecular interactions.

Purpose of the Study:

• To present a simplified and cost-effective method for RNA quantification in yeast using a single DNA oligo probe for FISH.
• To demonstrate the utility of this method for analyzing short RNA targets (<200 nucleotides).
• To explore applications in quantifying RNA isoforms and detecting co-transcription via FRET.

Main Methods:

• Development of a FISH protocol utilizing a single, short, fluorescently labeled DNA oligonucleotide probe.
• Application of the method in yeast cells for transcript localization and quantification.
• Validation of the method for analyzing short RNA targets and enabling FRET-based assays.

Main Results:

• The single-probe FISH method enables sensitive RNA quantification in yeast.
• The technique is effective for target RNA molecules with lengths less than 200 nucleotides.
• The method allows for the quantification of different RNA isoforms and facilitates FRET-based detection of co-transcription.

Conclusions:

• This novel single-probe FISH approach offers a more cost-effective and less labor-intensive alternative to traditional multi-probe methods.
• The technique is particularly valuable for specific FISH applications involving short RNA targets.
• This method expands the toolkit for single-cell RNA analysis, isoform quantification, and studying RNA dynamics.