PCR mutagenesis and gap repair in yeast

Area of Science:

• Molecular Biology
• Genetics
• Yeast Biology

Background:

• Random mutagenesis is a fundamental technique for understanding gene function by observing phenotypic changes.
• Yeast genetics benefits from efficient homologous recombination, facilitating the cloning of mutated genes into vectors.
• Existing protocols for yeast plasmid rescue to bacteria can be cumbersome.

Purpose of the Study:

• To provide optimized protocols for introducing random mutations into a target gene in yeast.
• To describe efficient methods for screening yeast colonies for desired phenotypes resulting from mutagenesis.
• To offer a reliable protocol for rescuing yeast plasmids containing mutations into bacterial hosts for sequencing.

Main Methods:

• Random mutagenesis of a specific gene was achieved using Polymerase Chain Reaction (PCR).
• The mutated DNA products were transformed into yeast cells.
• Homologous recombination in yeast facilitated the cloning of mutated alleles into yeast vectors.
• Selected yeast colonies exhibiting the desired phenotype were screened.
• Plasmids containing the identified mutations were rescued into bacterial cells for subsequent DNA sequencing.

Main Results:

• Successful introduction of random mutations into the target gene within the yeast host.
• Efficient screening of transformants identified colonies with specific phenotypic alterations.
• A reliable and straightforward protocol for rescuing yeast plasmids to bacteria was established and validated.

Conclusions:

• The presented protocols streamline the process of random mutagenesis, gene cloning, and phenotypic screening in yeast.
• The established plasmid rescue method simplifies the downstream sequencing of mutated alleles.
• These methods facilitate the genetic study of gene function in yeast by providing a robust workflow.