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Visualization and Analysis of mRNA Molecules Using Fluorescence In Situ Hybridization in Saccharomyces cerevisiae
Published on: June 14, 2013
Flocculation in Saccharomyces cerevisiae is repressed by the COMPASS methylation complex during high-gravity
Judith Dietvorst1, Anders Brandt
1Carlsberg Laboratory, Gamle Carlsberg Vej 10, DK-2500 Copenhagen Valby, Denmark. jdi@crc.dk
Yeast (Chichester, England)
|January 23, 2009
Summary
The COMPASS complex silences FLO and MAL genes in yeast. Mutants lacking COMPASS show increased flocculation due to higher FLO gene expression, impacting yeast fermentation.
Area of Science:
- Molecular Biology
- Yeast Genetics
- Gene Regulation
Background:
- Telomeric gene silencing is crucial for yeast Saccharomyces cerevisiae.
- The COMPASS complex regulates gene expression near telomeres.
- FLO and MAL genes are involved in yeast flocculation and maltose fermentation.
Purpose of the Study:
- To investigate the role of the COMPASS complex in silencing FLO and MAL genes.
- To understand COMPASS's influence on yeast fermentation efficiency and flocculation.
Main Methods:
- Studied Saccharomyces cerevisiae strains with varying fermentation efficiencies.
- Analyzed gene expression of FLO and MAL genes in wild-type and COMPASS mutants.
- Observed cell aggregation (flocculation) under different fermentation conditions.
Main Results:
- COMPASS mutants exhibited earlier and more pronounced cell aggregation (flocculation).
- Increased FLO1, FLO5, and FLO9 gene transcripts were observed in COMPASS mutants.
- COMPASS-mediated silencing of MAL genes was strain- and fermentation-dependent.
- COMPASS also silences FLO1, FLO5, and FLO9 genes.
Conclusions:
- COMPASS plays a significant role in silencing both MAL and FLO genes in Saccharomyces cerevisiae.
- Defects in COMPASS lead to increased FLO gene expression and altered flocculation phenotypes.
- COMPASS function is critical for regulating gene expression at telomeres and impacts yeast fermentation characteristics.
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