Profiling protein targets of cellular toxicant exposure

Area of Science:

• Biochemistry
• Toxicology
• Proteomics

Background:

• Environmental agents can chemically damage proteins, disrupting cellular protein homeostasis.
• Protein structure (secondary, tertiary, quaternary) significantly influences susceptibility to damage, beyond amino acid composition.
• Predicting specific protein targets of environmental toxins is challenging due to complex structural influences.

Purpose of the Study:

• To review mechanisms of protein damage by environmental toxins and toxicants.
• To describe emerging omic methodologies for identifying protein targets of environmental agents.
• To highlight the need for complementary approaches in studying protein integrity challenges.

Main Methods:

• Mass spectrometry-based proteomic strategies are essential for target identification.
• Activity-based protein profiling (ABPP) identifies reactive proteins.
• Protein footprinting and stability profiling offer complementary insights into protein damage.

Main Results:

• Environmental exposures cause specific residue damage, affecting protein function.
• Omic strategies, particularly mass spectrometry, are vital for mapping toxin-protein interactions.
• Multiple, integrated methods are necessary for comprehensive analysis of protein damage.

Conclusions:

• Understanding protein damage requires advanced proteomic techniques.
• Identifying protein targets of environmental agents is critical for toxicology and drug discovery.
• Complementary omic approaches provide a robust framework for assessing environmental impacts on the proteome.