Strategies and tools to explore protein S-nitrosylation

Area of Science:

• Biochemistry
• Proteomics
• Cellular Biology

Background:

• Nitric oxide (NO) mediates functional diversity via S-nitrosylation, a post-translational modification of protein cysteine residues.
• S-nitrosylation influences protein function, interactions, and cellular localization.
• Global studies on S-nitrosylation-regulated pathways and protein clusters are lacking.

Purpose of the Study:

• To review current proteomic approaches for global identification of S-nitrosylated proteins.
• To highlight the need for sensitive, validated, and quantitative methods.
• To address the knowledge gap regarding the global regulatory roles of S-nitrosylation.

Main Methods:

• Review of current proteomic techniques for S-nitrosylation identification.
• Emphasis on mass-spectrometry based proteomics for site-specific analysis.

Main Results:

• Current proteomic approaches enable global identification of S-nitrosylated proteins.
• Mass spectrometry provides site-specific identification of modified cysteine residues.

Conclusions:

• Novel methods combined with mass spectrometry offer critical insights into S-nitrosylation's regulatory role.
• Understanding the specificity and global impact of S-nitrosylation is essential for cellular physiology.
• Further global-scale studies will enhance appreciation of nitric oxide and S-nitrosylation in cellular function.