Quantitative analysis of the yeast pheromone pathway.

Area of Science:

• Cell Biology
• Biochemistry
• Systems Biology

Background:

• The yeast Saccharomyces cerevisiae is a model organism for studying G protein-coupled receptors and mitogen-activated protein kinase (MAPK) pathways.
• Established genetic and functional assays allow deep understanding of signaling mechanisms.

Purpose of the Study:

• To compare novel and existing methods for quantifying pheromone-induced MAPK phosphorylation, transcriptional changes, mating morphogenesis, and gradient tracking in yeast.
• To detail technical advancements and provide benchmark data for mutant strains.

Main Methods:

• Single-cell and population-based assays were employed.
• Methodologies for quantifying MAPK phosphorylation, gene induction, cell shape changes, and directed cell movement were assessed.
• Comparison of advantages and disadvantages of new versus established techniques.

Main Results:

• New and existing methods for assessing yeast pheromone response pathways were evaluated.
• Technical advances and benchmark data for mutant strains were presented.
• Differences, advantages, and disadvantages of various quantification techniques were highlighted.

Conclusions:

• Quantitative measurements of yeast pheromone pathway activity facilitate mathematical modeling and discovery of regulatory mechanisms.
• Developed experimental and computational approaches may be transferable to human systems biology and pharmacology.