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Nitropeptide Profiling and Identification Illustrated by Angiotensin II
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Strategies for profiling native S-nitrosylation.

Jaimeen D Majmudar1, Brent R Martin

  • 1Department of Chemistry, University of Michigan, 930 N. University Ave., Ann Arbor, MI, 48109.

Biopolymers
|July 6, 2013
PubMed
Summary
This summary is machine-generated.

Nitric oxide (NO) modifies cysteine residues via S-nitrosylation (SNO), a key redox regulation process. New methods for labeling SNO sites aid in understanding its role in disease and protein function.

Keywords:
nitric oxidenitrosylationpost-translational modification

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cellular Signaling

Background:

  • Cysteine is a reactive amino acid undergoing post-translational modifications.
  • Nitric oxide (NO) induces S-nitrosylation (SNO), a critical redox modification.
  • SNO regulates protein function across all life forms and is implicated in diseases.

Purpose of the Study:

  • To review current and emerging methods for labeling S-nitrosylation sites.
  • To highlight the role of SNO in protein function and disease pathology.

Main Methods:

  • Discusses thiol protection, selective nitrosothiol reduction, and capture techniques.
  • Introduces mechanism-based phosphine probes and mercury enrichment.
  • Emphasizes coupling enrichment strategies with high-resolution mass spectrometry.

Main Results:

  • Popular methods involve thiol masking, reduction, and capture.
  • Emerging techniques offer novel approaches for SNO site identification.
  • Large-scale SNO analysis reveals new oxidative regulatory pathways.

Conclusions:

  • Accurate labeling of SNO sites is crucial for biochemical analysis.
  • Advancements in enrichment and mass spectrometry enable large-scale SNO studies.
  • Understanding SNO is vital for deciphering redox regulation and disease mechanisms.