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Stationary phase in Saccharomyces cerevisiae
M Werner-Washburne1, E L Braun, M E Crawford
1Biology Department, University of New Mexico, Albuquerque 87131, USA. maggieww@unm.edu
Molecular Microbiology
|March 1, 1996
Summary
Yeast cells survive starvation by entering a stationary phase, a process involving growth arrest. This survival mechanism is separable from the cell
Area of Science:
- Microbiology
- Cell Biology
- Molecular Biology
Background:
- Microorganisms like Saccharomyces cerevisiae (yeast) enter stationary phase under starvation conditions.
- Starvation tolerance is crucial for microbial survival in nutrient-limited environments.
- Previous studies identified molecular changes in transcription, translation, and protein modification during stationary phase.
Purpose of the Study:
- To investigate the molecular mechanisms underlying yeast entry into stationary phase.
- To differentiate between growth arrest and the acquisition of starvation survival.
Main Methods:
- Analysis of gene expression and protein synthesis patterns in yeast.
- Comparison of molecular changes during exponential growth versus stationary phase.
- Investigation of alternative pathways like pseudohyphal growth under nutrient limitation.
Main Results:
- Protein synthesis patterns in stationary-phase yeast are similar to those during exponential growth.
- Yeast may utilize pathways like pseudohyphal growth when faced with specific nutrient limitations.
- A proposed model suggests growth arrest (G0 arrest) is distinct from the development of long-term starvation survival.
Conclusions:
- Entry into stationary phase involves a complex interplay of cellular responses.
- Growth arrest is a separable event from the acquisition of enhanced stress resistance in yeast.
- Understanding these pathways is key to comprehending microbial survival strategies.