Saccharomyces cerevisiae as a model organism: a comparative study.

Area of Science:

• Comparative genomics
• Systems biology
• Model organism research

Background:

• Model organisms are crucial for developing and standardizing research methods.
• Current model organism selection is often arbitrary, lacking a systematic approach to ensure representativeness.
• A rational method is needed to guide the selection of model organisms based on their suitability for specific research extrapolation.

Purpose of the Study:

• To propose and validate a systematic method for selecting model organisms.
• To assess the strengths and limitations of Saccharomyces cerevisiae as a model organism for broader biological studies.
• To identify which biological pathways and processes can be reliably studied using S. cerevisiae as a proxy.

Main Methods:

• Functional protein classification into biological pathways and processes.
• Full proteome comparisons between a model organism and 704 other species.
• Predictive analysis of S. cerevisiae's suitability for extrapolating results across diverse organisms.

Main Results:

• The method identifies specific pathways and processes where S. cerevisiae is a suitable model.
• S. cerevisiae is predicted to be a good model for studying a significant fraction of common biological processes in animals, including Homo sapiens.
• The approach successfully predicted organisms phenotypically distant from S. cerevisiae for various biological processes.

Conclusions:

• The proposed method enables the selection of appropriate substitute model organisms for studying difficult species.
• This approach can facilitate research on human pathologies by identifying suitable model systems.
• It offers a way to study long-development-time species, like plants, using more tractable models.