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The core meiotic transcriptome in budding yeasts.

M Primig¹, R M Williams, E A Winzeler

¹The University of Chicago, Department of Molecular Genetics and Cell Biology, Chicago, Illinois, USA.

Nature Genetics

|December 2, 2000

Summary

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This study analyzed yeast genomes and meiotic gene expression using microarrays, revealing genetic differences and identifying over 1,600 meiotically regulated genes in each strain. Most identified genes were mating-type dependent, correlating with promoter elements and gene function timing.

Area of Science:

Molecular Biology
Genomics
Yeast Genetics

Background:

Sporulation efficiency and kinetics vary significantly between yeast strains.
Understanding meiotic gene regulation is crucial for yeast biology.

Purpose of the Study:

To compare the genomes and meiotic expression patterns of two distinct yeast strains (SK1 and W303).
To identify meiotically regulated genes and their regulatory mechanisms.

Main Methods:

High-density oligonucleotide microarrays were employed for genomic DNA hybridization and gene expression analysis.
Comparative analysis of gene deletions, polymorphisms, and transcript profiles between SK1 and W303 strains.

Main Results:

Numerous gene deletions and polymorphisms were detected in both yeast strains.

Related Experiment Videos

Approximately 1,600 meiotically regulated genes were identified per strain, with 60% showing conserved patterns.

Most regulated genes (95%) were mating-type (MATa/MATalpha) dependent and their expression correlated with promoter elements and gene function timing.

Conclusions:

Significant genomic variations exist between yeast strains impacting sporulation.
A core set of meiotically regulated genes, largely mating-type dependent, was identified, providing insights into sporulation control.