'Marker swap' plasmids: convenient tools for budding yeast molecular genetics

Area of Science:

• Molecular Biology
• Yeast Genetics
• Synthetic Biology

Background:

• Traditional gene disruption methods often use identical markers, complicating genetic analysis of multiple genes or plasmids.
• The need for marker subcloning to resolve these conflicts is time-consuming and labor-intensive.

Purpose of the Study:

• To develop novel one-step gene disruption constructs with interchangeable markers.
• To facilitate unambiguous genetic analysis in yeast, particularly for synthetic phenotypes and multi-plasmid systems.

Main Methods:

• Construction of one-step gene disruption cassettes utilizing HIS3, LEU2, TRP1, and URA3 markers.
• Testing the efficacy of these 'marker-swap' constructs in gene disruptions and on plasmids.

Main Results:

• Successfully constructed and validated gene disruption cassettes with swapped markers.
• Demonstrated effective marker conversion in both gene disruptions and plasmid transformations.
• Showcased the utility of 'swapped' strains for analyzing synthetic phenotypes and introducing multiple plasmids.

Conclusions:

• 'Marker-swap' plasmids significantly reduce the requirement for subcloning to change markers.
• These constructs offer stability for most applications, enabling complex genetic analyses.
• The developed tools streamline genetic manipulation and analysis in yeast research.