The Cross-and-Capture system: a versatile tool in yeast proteomics.

Area of Science:

• * Molecular Biology
• * Yeast Proteomics
• * Systems Biology

Background:

• * High-throughput methods like affinity purification and yeast two-hybrid (Y2H) screening are established for exploring protein-protein interactions (PPIs) in Saccharomyces cerevisiae.
• * Existing techniques have limitations in scope or application for comprehensive PPI analysis.
• * A need exists for alternative, robust methods to study complex biological interactions in model organisms.

Purpose of the Study:

• * To introduce and summarize the development of the Cross-and-Capture system for assessing PPIs.
• * To describe the application of Cross-and-Capture in identifying protein complexes.
• * To demonstrate its utility in screening for novel protein-protein interactions.

Main Methods:

• * The Cross-and-Capture system utilizes two arrayed collections of differentially tagged yeast strains for PPI assessment.
• * The current implementation involves approximately 500 endogenously tagged yeast proteins, focusing on DNA metabolism and maintenance roles.
• * Tagged arrays facilitate monitoring of protein expression and detection of posttranslational modifications.

Main Results:

• * The Cross-and-Capture system has been successfully developed as a tool for yeast proteomics.
• * The system enables the detection and characterization of protein complexes within yeast.
• * Novel protein-protein interactions have been identified using this screening approach.

Conclusions:

• * Cross-and-Capture provides a valuable alternative for assessing protein-protein interactions in Saccharomyces cerevisiae.
• * The system expands the toolkit for yeast proteomics, including protein expression monitoring and posttranslational modification detection.
• * This method contributes to a deeper understanding of protein complex formation and interaction networks in yeast.