Pathological Impact of Redox Post-Translational Modifications

Area of Science:

• Biochemistry and Molecular Biology
• Cellular Redox Biology

Background:

• Oxidative stress, driven by reactive oxygen species (ROS), induces critical redox post-translational modifications (PTMs) in proteins, nucleic acids, and lipids.
• These modifications, including cysteine and methionine oxidation and protein carbonylation, are implicated in various pathologies.
• Understanding these redox-induced PTMs is crucial for deciphering disease mechanisms.

Purpose of the Study:

• To review recent data on cysteine and methionine oxidation and protein carbonylation in pathological contexts.
• To explore the impact of redox-induced PTMs on protein function, activity, and disease development.
• To evaluate the therapeutic potential of targeting specific redox modifications.

Main Methods:

• Literature review of recent advances in oxidative stress and redox PTMs.
• Analysis of studies detailing the impact of ROS and reactive nitrogen species (RNS) on protein function.
• Examination of the selective nature of oxidation and its dependence on protein structure and environment.

Main Results:

• Oxidative stress leads to diverse PTMs, with hundreds of proteins identified as targets.
• Redox-induced PTMs exhibit complex effects on protein function, with some modifications decreasing activity and others increasing it.
• The oxidation of cysteine thiols and methionine residues can be reversible or irreversible, while carbonylation is irreversible.

Conclusions:

• The complex, context-dependent regulation of protein function by redox PTMs suggests that broad antioxidant therapies may be ineffective.
• Targeting specific cysteine or methionine residues for therapeutic intervention holds promise for modulating protein activity and treating diseases.
• Developing pharmacological tools for precise targeting of these residues is a key area for future therapeutic development.