Redox signaling

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Redox signaling is the process wherein free radicals, reactive oxygen species (ROS), and other electronically activated species act as messengers in biological systems.

At the hub of both biotic and abiotic stress signaling is the formation of ROS such as hydrogen peroxide. As a signaling molecule, hydrogen peroxide and other ROS post- translationally modify target proteins by oxidizing thiol groups thus forming disulfide bonds that reversibly alter protein structure and function. Specificity is achieved by localized production, concatenate hormone or calcium signaling, with targeted secondary oxidation occurring via glutaredoxins or thioredoxins. Target proteins containing reduction-oxidation (redox) sensitive thiol groups include i) signal transduction pathway proteins, such as phosphatases and mitogen-activated protein kinasesKovtun Y., Chiu W.L., Tena G., and...
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