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Mutational analysis of morphologic differentiation in Saccharomyces cerevisiae
M J Blacketer1, P Madaule, A M Myers
1Department of Biochemistry and Biophysics, Iowa State University, Ames 50011, USA.
Genetics
|August 1, 1995
Summary
Genetic analysis of Saccharomyces cerevisiae revealed 14 genes controlling cell shape. Mutations in these elongated morphology (elm) genes mimic yeast pseudohyphal differentiation, suggesting a role in this developmental pathway.
Area of Science:
- Cell Biology
- Genetics
- Microbiology
Background:
- Cellular morphogenesis is crucial for yeast development.
- Understanding the genetic basis of cell shape control is essential for deciphering yeast differentiation pathways.
Purpose of the Study:
- To identify genes regulating cellular morphogenesis in Saccharomyces cerevisiae.
- To investigate the relationship between cell elongation mutations and pseudohyphal differentiation.
Main Methods:
- Isolation and characterization of 60 mutant yeast strains with elongated cell morphology.
- Genetic analysis, including complementation tests, to define genes involved.
- Phenotypic analysis of mutant strains under various growth conditions.
Main Results:
- Identified 14 genes, designated elm (elongated morphology), controlling cell shape.
- Found that mutations in 11 of these 14 genes potentiated pseudohyphal differentiation.
- Observed that elm mutations conferred multiple pseudohyphal characteristics, including altered cell shape and budding patterns.
Conclusions:
- A subset of ELM genes are critical regulators of pseudohyphal differentiation in S. cerevisiae.
- These genes likely play roles in the control or execution of this specific morphogenetic pathway.
- The study provides new insights into the genetic mechanisms governing yeast cell form and differentiation.