| polyol | Polyhydroxy alcohol;a sugar that contains many -OH (-ol) groups, such as the sugar alcohols and inositols. Polyol dehydrogenases, oxidizing enzymes that catalyze the dehydrogenation of sugar alcohols to monosaccharides (in EC class 1.1), specifically l-iditol dehydrogenase and aldose reductase. (05 Mar 2000) |
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| polyol pathway | A pathway responsible for d-fructose formation from sorbitol; increases in activity as the glucose concentration rises in diabetes. Synonym: polyol pathway. (05 Mar 2000) |
| amino acid dehydrogenases | Enzymes catalyzing the oxidative deamination of amino acids to the corresponding oxo (keto) acids; two relatively non-specific varieties exist, l and d, for which l-amino acids and d-amino acids are the respective substrates; the products include NH3 and a reduced hydrogen acceptor (NADH in the l case); amino acid dehydrogenases of greater specificity exist, (e.g., glycine dehydrogenase). Compare: amino acid oxidases. (05 Mar 2000) |
| carbohydrate dehydrogenases | <enzyme> Reversibly catalyze the oxidation of a hydroxyl group of carbohydrates to form a keto sugar, aldehyde or lactone. Any acceptor except molecular oxygen is permitted. Registry number: EC 1.1. (12 Dec 1998) |
| galactose dehydrogenases | <enzyme> D-galactose:NAD(p)+ 1-oxidoreductases. Catalyses the oxidation of d-galactose in the presence of NAD+ or NADP+ to d-galactono-gamma-lactone and NADH or NADPH. Registry number: EC 1.1.1. (12 Dec 1998) |
| glucose dehydrogenases | <enzyme> D-glucose:1-oxidoreductases. Catalyses the oxidation of d-glucose to d-glucono-gamma-lactone and reduced acceptor. Any acceptor except molecular oxygen is permitted. Registry number: EC 1.1.1. (12 Dec 1998) |
| glutamate dehydrogenases | Enzymes that catalyze the reaction of l-glutamate, H2O, and NAD+ (or NADP+ in some cases) producing alpha-ketoglutarate (2-oxoglutarate), ammonia, and NADH; in mammals, this is the prime contributor to oxidative deamination. Synonym: glutamic acid dehydrogenases. (05 Mar 2000) |
| glutamic acid dehydrogenases | Enzymes that catalyze the reaction of l-glutamate, H2O, and NAD+ (or NADP+ in some cases) producing alpha-ketoglutarate (2-oxoglutarate), ammonia, and NADH; in mammals, this is the prime contributor to oxidative deamination. Synonym: glutamic acid dehydrogenases. (05 Mar 2000) |
| saccharopine dehydrogenases | <enzyme> N-5-(1,3-dicarboxypropyl)-l-lysine:NAD(p)+ oxidoreductase (l-lysine-forming). Catalyses the oxidative cleavage of saccharopine to lysine plus ketoglutaric acid. Requires NAD; EC 1.5.1.8 requires NADP. Registry number: EC 1.5.1. (12 Dec 1998) |
| hydroxyprostaglandin dehydrogenases | <enzyme> Catalyses reversibly the oxidation of hydroxyl groups of prostaglandins. Registry number: EC 1.1.1.- (12 Dec 1998) |
| hydroxysteroid dehydrogenases | <enzyme> Enzymes of the oxidoreductase class that catalyze the dehydrogenation of hydroxysteroids. Registry number: EC 1.1.- (12 Dec 1998) |
| sugar alcohol dehydrogenases | <enzyme> Reversibly catalyses the oxidation of a hydroxyl group of sugar alcohols to form a keto sugar, aldehyde or lactone. Any acceptor except molecular oxygen is permitted. Registry number: EC 1.1. (12 Dec 1998) |
| estradiol dehydrogenases | <enzyme> Enzymes that catalyze the oxidation of estradiol at the 17-hydroxyl group in the presence of NAD+ or NADP+ to yield estrone and NADH or NADPH. The 17-hydroxyl group can be in the alpha- or beta-configuration.2 Chemical name: Estradiol-17 beta:NAD(P)+ 17-oxidoreductase Registry number: EC 1.1.1.62 (12 Dec 1998) |
| 17-hydroxysteroid dehydrogenases | <enzyme> A class of enzymes that catalyses the oxidation of 17-hydroxysteroids to 17-ketosteroids. Registry number: EC 1.1.- (12 Dec 1998) |
| 20-hydroxysteroid dehydrogenases | <enzyme> Catalyze the oxidation of 20-hydroxysteroids to 20-ketosteroids. Registry number: EC 1.1.- (12 Dec 1998) |