Target type: molecularfunction
Catalysis of the reaction: D-ribitol + NAD+ = D-ribulose + H+ + NADH. [EC:1.1.1.56, RHEA:20053]
Ribitol 2-dehydrogenase activity catalyzes the reversible oxidation of ribitol to D-ribulose. This enzyme utilizes NAD+ as an electron acceptor, converting it to NADH. The reaction involves the removal of two hydrogen atoms from ribitol, resulting in the formation of a double bond between carbon atoms 2 and 3, thus creating a keto group on carbon atom 2. Ribitol 2-dehydrogenase plays a crucial role in the metabolism of ribitol, a sugar alcohol found in various organisms, including bacteria and fungi. This enzyme is involved in the biosynthesis of D-ribulose, which is a key intermediate in the pentose phosphate pathway. The pentose phosphate pathway is a metabolic route that generates NADPH and pentose sugars essential for nucleotide biosynthesis and other cellular processes. In some bacteria, ribitol 2-dehydrogenase is also involved in the catabolism of ribitol, converting it to D-ribulose for further breakdown.'
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| Protein | Definition | Taxonomy |
|---|---|---|
| Sorbitol dehydrogenase | A sorbitol dehydrogenase that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q00796] | Homo sapiens (human) |
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| coumarin | 2H-chromen-2-one: coumarin derivative | coumarins | fluorescent dye; human metabolite; plant metabolite |
| herniarin | herniarin : A member of the class of coumarins that is coumarin substituted by a methoxy group at position 7. herniarin: methoxy analog of umbelliferone; structure | coumarins | fluorochrome |
| 3-hydroxy-1-benzopyran-2-one | 3-hydroxycoumarin: Photoprotective from sea urchin gametes and embryonic cells; structure in first source hydroxycoumarin : Any coumarin carrying at least one hydroxy substituent. | hydroxycoumarin | |
| isoscopoletin | isoscopoletin : A hydroxycoumarin that is esculetin in which the hydroxy group at position 7 is replaced by a methoxy group. It is the major primary metabolite of scoparone. | aromatic ether; hydroxycoumarin | plant metabolite |
| cp-166,572 | |||
| epalrestat | epalrestat : A monocarboxylic acid that is 1,3-thiazolidine which is substituted on the nitrogen by a carboxymethyl group, at positions 2 and 4 by thioxo and oxo groups, respectively, and at position 5 by a 2-methyl-3-phenylprop-2-en-1-ylidene group. It is an inhibitor of aldose reductase (which catalyses the conversion of glucose to sorbitol) and is used for the treatment of some diabetic complications, including neuropathy. | monocarboxylic acid; thiazolidines | EC 1.1.1.21 (aldehyde reductase) inhibitor |
| quercetin | 7-hydroxyflavonol; pentahydroxyflavone | antibacterial agent; antineoplastic agent; antioxidant; Aurora kinase inhibitor; chelator; EC 1.10.99.2 [ribosyldihydronicotinamide dehydrogenase (quinone)] inhibitor; geroprotector; phytoestrogen; plant metabolite; protein kinase inhibitor; radical scavenger | |
| scopoletin | hydroxycoumarin | plant growth regulator; plant metabolite | |
| hymecromone | Hymecromone: A coumarin derivative possessing properties as a spasmolytic, choleretic and light-protective agent. It is also used in ANALYTICAL CHEMISTRY TECHNIQUES for the determination of NITRIC ACID. | hydroxycoumarin | antineoplastic agent; hyaluronic acid synthesis inhibitor |
| esculetin | esculetin : A hydroxycoumarin that is umbelliferone in which the hydrogen at position 6 is substituted by a hydroxy group. It is used in filters for absorption of ultraviolet light. esculetin: used in filters for absorption of ultraviolet light; structure | hydroxycoumarin | antioxidant; plant metabolite; ultraviolet filter |
| 7-hydroxycoumarin | 7-oxycoumarin: derivatives have anti-oxidant properties umbelliferone : A hydroxycoumarin that is coumarin substituted by a hydroxy group ay position 7. | hydroxycoumarin | fluorescent probe; food component; plant metabolite |
| 4-methylesculetin | 4-methylesculetin: has antiinflammatory activity 6,7-dihydroxy-4-methylcoumarin : A hydroxycoumarin that is 4-methylcuomarin which is substituted by hydroxy groups at positions 3 and 4. A hyaluronan synthesis inhibitor. It has also been used as a fluorescent sensor to monitor the consumption of a boronic acid in Suzuki coupling reactions; fluorescence is readily detectable by the naked eye using a standard 365 nm UV lamp. | hydroxycoumarin | anti-inflammatory agent; antioxidant; hyaluronan synthesis inhibitor |
| 7-hydroxycoumarin-4-acetic acid | 7-hydroxycoumarin-4-acetic acid: pH-indicator dye; structure in first source | ||
| 4-hydroxycoumarin | 2-hydroxychromone: structure | hydroxycoumarin |