Peptide-Based Mass Spectrometry for the Investigation of Protein Complexes

Area of Science:

• Biochemistry
• Analytical Chemistry
• Proteomics

Background:

• Biological mass spectrometry has become the gold standard for protein identification over the past 20 years.
• Technological advancements in mass spectrometers and associated methods have driven the success of this technique.
• High-resolution mass spectrometric data acquisition has significantly improved protein analysis.

Purpose of the Study:

• To introduce peptide-based mass spectrometry as a tool for investigating protein complexes.
• To provide an overview of essential sample preparation steps, including protein fractionation, reduction, alkylation, and digestion.
• To describe the fundamental concepts of biological mass spectrometry, instrumental analysis, and data acquisition.

Main Methods:

• Sample preparation: protein fractionation, reduction, alkylation, and enzymatic digestion.
• Instrumental analysis: ionization, gas phase transfer, and peptide fragmentation.
• Data acquisition: high-resolution mass spectrometric data collection.

Main Results:

• Detailed description of the core principles and methodologies of peptide-based mass spectrometry.
• Comprehensive overview of sample preparation techniques crucial for protein complex analysis.
• Summary of common data analysis and sequence determination methods.

Conclusions:

• Peptide-based mass spectrometry is a powerful method for protein complex investigation.
• Understanding the workflow from sample preparation to data analysis is critical for successful application.
• The chapter emphasizes the application of these techniques to the study of protein-protein interactions.