Mass spectrometry-based methods for structural biology on a proteome-wide scale

Area of Science:

• Biochemistry
• Structural Biology
• Proteomics

Background:

• Mass spectrometry (MS) traditionally focuses on protein identification and quantification.
• Recent advancements have positioned MS as a powerful tool for structural biology.
• Understanding protein structure in native environments is crucial for functional insights.

Purpose of the Study:

• To review MS-based methods for proteome-wide structural studies.
• To highlight the application of these methods in understanding protein structure and interactions.
• To emphasize the importance of studying proteins in their native cellular context.

Main Methods:

• Native MS, top-down proteomics, and ion mobility MS for intact protein analysis.
• Affinity purification MS, chemical cross-linking, and protein footprinting for interaction studies.
• Coupling MS with liquid chromatography for bottom-up proteomics in complex samples.

Main Results:

• MS enables the study of protein-protein and protein-ligand interactions.
• These methods reveal regions of conformational change.
• Bottom-up proteomics provides structural information across the entire proteome.
• Cellular crowding effects on protein binding interactions and affinities can be studied.

Conclusions:

• MS-based structural methods provide a more physiological view of protein structure.
• Analysis of cell lysates, intact cells, and tissues is facilitated by MS.
• These techniques are essential for understanding protein function in native environments.