Peroxiredoxins

Peroxiredoxins are a family of ubiquitous and highly conserved enzymes found in all aerobic organisms. Their primary function is to protect cells from oxidative damage by reducing reactive oxygen species (ROS), such as hydrogen peroxide. They achieve this through a catalytic cysteine residue within their active site, which is oxidized during the reduction of ROS and then regenerated by a second cysteine residue, often within the same or a different subunit of the enzyme. This cyclical process allows peroxiredoxins to efficiently detoxify peroxides, thereby preventing damage to vital cellular components like DNA, proteins, and lipids. Beyond their antioxidant role, peroxiredoxins are implicated in a variety of other cellular processes including signal transduction, gene regulation, and the regulation of protein folding. Their involvement in these diverse pathways highlights their crucial importance in maintaining cellular homeostasis and responding to environmental stresses. Dysfunction of peroxiredoxins has been linked to various diseases, including cancer and neurodegenerative disorders, underscoring their significance in health and disease.