Free Radicals & Protein Thiols

The entry "Free Radicals & Protein Thiols" describes a broad chemical process in which **protein thiols** (mainly cysteine residues in proteins) react with **free radicals** (unstable chemical species with unpaired electrons), leading to diverse oxidative modifications. One key product is the **thiyl radical**, which is involved in both damaging and protective cellular processes. Oxidation of protein thiols can alter protein function, regulate redox signaling pathways, impact antioxidant defenses, and contribute to disease if dysregulated. These interactions are central to oxidative stress biology and are implicated in pathologies such as cancer, inflammatory, neurodegenerative, and cardiovascular diseases. However, "Free Radicals & Protein Thiols" is not a single protein, receptor, or druggable target: it is a category of redox interactions fundamental to cell physiology and pathology[1][2][3][4]. This entry is not a canonical molecular target, but an umbrella for a diverse, important set of biochemical reactions involving thiol groups and radical species.

Other names

Protein thiol oxidationThiyl radicalsProtein S-thiolationProtein S-glutathionylationRedox signaling proteins

Radical scavenging, Protein thiol reduction/oxidation, Modification of redox-sensitive proteins