Ascorbate and aldarate metabolism

"Ascorbate and aldarate metabolism" refers to a metabolic pathway, not a single molecule or receptor. This pathway encompasses the biosynthesis, degradation, and interconversion of ascorbic acid (vitamin C) and related sugar acids (aldarates) in living organisms[1][4][7]. The pathway is central to antioxidant defense by regulating cellular redox state through the scavenging of reactive oxygen species (ROS), particularly via ascorbate’s role as an electron donor[3][9]. In plants, this includes multiple biosynthetic routes for ascorbate production—most notably the L-galactose pathway—and involves several enzymes such as phosphomannose isomerase, GDP-mannose pyrophosphorylase, and L-galactono-1,4-lactone dehydrogenase[2][5][8]. Disruption or dysregulation of this metabolic network can contribute to diseases associated with oxidative stress including cardiovascular disorders, cancer, aging-related conditions, and neurodegenerative diseases[1]. Metabolites such as dehydroascorbic acid are sometimes used as biomarkers for oxidative status or metabolic health. Note: This entry does not correspond to a discrete therapeutic target like an enzyme or receptor but rather describes a complex biochemical process. Therefore, - It should not be classified under canonical molecular targets. - There are no direct interacting drugs; instead, drugs may modulate specific enzymes within this pathway. - Mechanisms of action would pertain to individual enzymes within the pathway rather than "ascorbate and aldarate metabolism" itself. If you require structured information on specific enzymes within this pathway (e.g., "L-galactono-1,4-lactone dehydrogenase"), please specify which component you wish to focus on.