Mass spectrometry as a readout of protein structure and function

Area of Science:

• Biochemistry
• Structural Biology
• Analytical Chemistry

Background:

• Proteins perform specific cellular functions through interactions with biomolecules.
• Understanding the link between protein higher-order structure and function is crucial for molecular biology.
• Mass spectrometry (MS) has emerged as a key technology in protein research.

Purpose of the Study:

• To summarize mass spectrometry approaches for analyzing protein structure and function.
• To highlight recent applications of MS in understanding protein behavior.
• To underscore the unique insights MS provides into protein mysteries.

Main Methods:

• Electrospray ionization (ESI)-based mass spectrometry.
• Matrix-assisted laser desorption/ionization (MALDI)-based mass spectrometry.
• Monitoring protein folding and conformational changes using MS.
• Characterizing noncovalent protein complexes via MS.
• Assessing amino acid residue contributions to protein function with MS.

Main Results:

• ESI- and MALDI-MS enable monitoring of protein folding dynamics.
• MS techniques successfully characterize complex noncovalent protein assemblies.
• Mass spectrometry quantifies the impact of specific amino acid residues on protein function.
• Recent studies showcase MS's ability to provide novel biological insights.

Conclusions:

• Mass spectrometry offers versatile and powerful methods for protein structure-function analysis.
• MS is indispensable for dissecting complex biological interactions at the molecular level.
• The application of MS continues to expand, yielding significant discoveries in protein science.