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Updated: Jul 5, 2026
04:36
Assay for Adhesion and Agar Invasion in S. cerevisiae
Published on: November 8, 2006
Filament formation in Saccharomyces cerevisiae--a review
1Cardiff School of Bioscences, Cardiff University, Cardiff, CF10 3TL, UK. Dickinson@cardiff.ac.uk
Folia Microbiologica
|May 16, 2008
Summary
Yeast filament formation, induced by fusel alcohols like 3-methyl-1-butanol (3Me-BuOH), is a response to reduced growth rate, not nutrient scarcity. This process involves altered mitochondrial mass and chitin content in Saccharomyces cerevisiae.
Area of Science:
- * Yeast cell biology and filamentous growth.
- * Molecular mechanisms of yeast morphogenesis.
- * Metabolic regulation of microbial development.
Background:
- * Yeast filamentation (hyphae, pseudohyphae) is typically associated with nutrient-poor conditions.
- * Fusel alcohols, end products of amino acid catabolism, induce filamentation even in nutrient-rich media.
- * These alcohols signal reduced growth rate and trigger specific cellular responses.
Purpose of the Study:
- * To investigate the cell biological and biochemical changes during fusel alcohol-induced filamentation.
- * To elucidate the transcriptional regulation underlying this morphogenetic switch.
- * To identify key genes and proteins involved in filament formation and invasion.
Main Methods:
- * Induction of filamentation using 3-methyl-1-butanol (3Me-BuOH) in Saccharomyces cerevisiae.
- * Analysis of cellular components: mitochondrial mass and chitin content.
- * Global transcriptional profiling (RNA sequencing) to identify gene expression changes.
- * Gene deletion and overexpression studies to assess functional roles in filamentation.
Main Results:
- * Filamentous cells of Saccharomyces cerevisiae exhibit increased mitochondrial mass and chitin content compared to yeast-form cells.
- * 3Me-BuOH induction leads to significant transcriptional upregulation of specific genes (e.g., transporters) and downregulation of others.
- * Functional studies identified essential proteins, repressors, and non-essential factors for filamentation and invasion.
- * Protein activity correlates with mRNA levels, indicating post-transcriptional regulation.
Conclusions:
- * Fusel alcohol-induced filamentation in yeast is a response to reduced growth rate, not a foraging strategy.
- * This process involves significant alterations in cellular composition and gene expression.
- * Specific genes and proteins play critical roles in regulating yeast morphogenesis and invasion.
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