Protein-protein interactions: switch from classical methods to proteomics and bioinformatics-based approaches.

Area of Science:

• Proteomics
• Functional Genomics
• Bioinformatics

Background:

• The advent of genome sequencing has spurred research into protein functions.
• Proteins act as molecular effectors in cellular processes, forming dynamic networks.
• Understanding these protein-protein interactions (PPIs) is fundamental to cell biology.

Purpose of the Study:

• To review the importance of studying the protein interactome.
• To present classical and modern methods for investigating PPIs.
• To emphasize the shift towards proteomics and bioinformatics approaches.

Main Methods:

• Classical genetic (yeast two-hybrid) and biochemical (co-immunoprecipitation, affinity purification) methods.
• Structure-based bioinformatics approaches.
• Proteomics-based methods, with a focus on recently developed native techniques.

Main Results:

• A shift in PPI research from classical to proteomics and bioinformatics methods.
• Identification of reliable native proteomic techniques for PPI analysis.
• Highlighting the challenges and limitations in current PPI investigation methods.

Conclusions:

• Unraveling the protein interactome is the next major challenge in proteomics.
• Native proteomic techniques offer reliable approaches for PPI studies.
• Standardization of PPI experimental validation is necessary for robust findings.