Preparation of Saccharomyces cerevisiae expression plasmids

Area of Science:

• Molecular Biology
• Biotechnology
• Yeast Genetics

Background:

• Saccharomyces cerevisiae expression plasmids offer diverse options for vector copy number, promoter strength, and selection markers.
• Shuttle vectors, replicable in both yeast and bacteria, are crucial for gene cloning.
• Green fluorescent protein (GFP) fusion technology, established in Escherichia coli, is applicable for heterologous membrane protein production.

Purpose of the Study:

• To describe the construction of multi-copy yeast expression plasmids.
• To utilize homologous recombination in Saccharomyces cerevisiae for plasmid construction.
• To facilitate heterologous membrane protein production using GFP fusion technology.

Main Methods:

• Design of an expression plasmid incorporating an inducible GAL1 promoter.
• Inclusion of a gene encoding a membrane protein of interest.
• Fusion of the membrane protein gene with a green fluorescent protein (GFP)-octa-histidine sequence.
• Construction of multi-copy plasmids via homologous recombination in S. cerevisiae.

Main Results:

• Successfully constructed multi-copy yeast expression plasmids.
• Developed a system for heterologous membrane protein production in S. cerevisiae.
• Demonstrated the utility of GFP fusion technology in yeast expression systems.

Conclusions:

• Homologous recombination provides an efficient method for constructing multi-copy yeast expression plasmids.
• The developed plasmids are suitable for heterologous production of membrane proteins.
• The integration of GFP fusion technology enhances the study of membrane proteins in yeast.