Target type: molecularfunction
(S)-dihydroorotate + a quinone = orotate + a quinol. [RHEA:30187]
Dihydroorotate dehydrogenase (quinone) activity catalyzes the oxidation of dihydroorotate to orotate, a crucial step in the de novo biosynthesis of pyrimidine nucleotides. This enzyme utilizes a quinone as an electron acceptor, which is then reduced to a hydroquinone. The reaction occurs in the mitochondrial matrix and involves the transfer of two electrons from dihydroorotate to the quinone. The oxidized form of the quinone, such as ubiquinone (CoQ), acts as a mobile electron carrier in the mitochondrial electron transport chain, contributing to ATP synthesis. Dihydroorotate dehydrogenase plays a pivotal role in the synthesis of pyrimidine nucleotides, which are essential building blocks for DNA and RNA. Mutations in the gene encoding this enzyme can lead to orotic aciduria, a rare genetic disorder characterized by an accumulation of orotic acid in the urine and severe anemia. The enzyme's activity is regulated by the availability of its substrates, dihydroorotate and quinone, as well as by the levels of its products, orotate and reduced quinone.'
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| Protein | Definition | Taxonomy |
|---|---|---|
| Dihydroorotate dehydrogenase (quinone), mitochondrial | A dihydroorotate dehydrogenase (quinone), mitochondrial that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q02127] | Homo sapiens (human) |
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| 2,3-dimethoxy-5-methyl-6-decyl-1,4-benzoquinone | 2,3-dimethoxy-5-methyl-6-decyl-1,4-benzoquinone: ubiquinol analog 6-decylubiquinone : A member of the class of 1,4-benzoquinones that is 2,3-dimethoxybenzoquinone which has been substituted at positions 5 and 6 by decyl and methyl groups. | 1,4-benzoquinones | cofactor |
| lapachol | lapachol : A hydroxy-1,4-naphthoquinone that is 1,4-naphthoquinone substituted by hydroxy and 3-methylbut-2-en-1-yl groups at positions 2 and 3, respectively. It is a natural compound that exhibits antibacterial and anticancer properties, first isolated in 1882 from the bark of Tabebuia avellanedae. | ||
| leflunomide | leflunomide : A monocarboxylic acid amide obtained by formal condensation of the carboxy group of 5-methyl-1,2-oxazole-4-carboxylic acid with the anilino group of 4-(trifluoromethyl)aniline. The prodrug of teriflunomide. Leflunomide: An isoxazole derivative that inhibits dihydroorotate dehydrogenase, the fourth enzyme in the pyrimidine biosynthetic pathway. It is used an immunosuppressive agent in the treatment of RHEUMATOID ARTHRITIS and PSORIATIC ARTHRITIS. | (trifluoromethyl)benzenes; isoxazoles; monocarboxylic acid amide | antineoplastic agent; antiparasitic agent; EC 1.3.98.1 [dihydroorotate oxidase (fumarate)] inhibitor; EC 3.1.3.16 (phosphoprotein phosphatase) inhibitor; hepatotoxic agent; immunosuppressive agent; non-steroidal anti-inflammatory drug; prodrug; pyrimidine synthesis inhibitor; tyrosine kinase inhibitor |
| niflumic acid | Niflumic Acid: An analgesic and anti-inflammatory agent used in the treatment of rheumatoid arthritis. | aromatic carboxylic acid; pyridines | |
| quinone | 1,4-benzoquinone : The simplest member of the class of 1,4-benzoquinones, obtained by the formal oxidation of hydroquinone to the corresponding diketone. It is a metabolite of benzene. benzoquinone : The simplest members of the class of benzoquinones, consisting of cyclohexadiene which is substituted by two oxo groups. quinone : Compounds having a fully conjugated cyclic dione structure, such as that of benzoquinones, derived from aromatic compounds by conversion of an even number of -CH= groups into -C(=O)- groups with any necessary rearrangement of double bonds (polycyclic and heterocyclic analogues are included). | 1,4-benzoquinones | cofactor; human xenobiotic metabolite; mouse metabolite |
| cinchophen | cinchophen: was heading 1963-94; ACIPHENOCHINOLIUM was see CHINOPHEN 1978-94; use QUINOLINES to search CINCHOPHEN 1966-94 | quinolines | |
| oxycinchophen | quinolines | ||
| clonixin | clonixin : A pyridinemonocarboxylic acid that is nicotinic acid substituted at position 2 by a (2-methyl-3-chlorophenyl)amino group. Used (as its lysine salt) for treatment of renal colic, muscular pain and moderately severe migraine attacks. Clonixin: Anti-inflammatory analgesic. | aminopyridine; organochlorine compound; pyridinemonocarboxylic acid | antipyretic; EC 1.14.99.1 (prostaglandin-endoperoxide synthase) inhibitor; lipoxygenase inhibitor; non-narcotic analgesic; non-steroidal anti-inflammatory drug; platelet aggregation inhibitor; vasodilator agent |
| flunixin | flunixin : A pyridinemonocarboxylic acid that is nicotinic acid substituted at position 2 by a 2-methyl-3-(trifluoromethyl)phenylamino group. A relatively potent non-narcotic, nonsteroidal analgesic with anti-inflammatory, anti-endotoxic and anti-pyretic properties; used in veterinary medicine (usually as the meglumine salt) for treatment of horses, cattle and pigs. | aminopyridine; organofluorine compound; pyridinemonocarboxylic acid | antipyretic; EC 1.14.99.1 (prostaglandin-endoperoxide synthase) inhibitor; non-narcotic analgesic; non-steroidal anti-inflammatory drug |
| brequinar | brequinar : A quinolinemonocarboxylic acid that is quinoline substituted by 2'-fluoro[1,1'-biphenyl]-4-yl, methyl, carboxy and fluoro groups at positions 2, 3, 4, and 6, respectively. It is an inhibitor of dihydroorotate dehydrogenase, an enzyme that is required for de novo pyrimidine biosynthesis. The compound exhibits antineoplastic and antiviral properties. | biphenyls; monocarboxylic acid; monofluorobenzenes; quinolinemonocarboxylic acid | anticoronaviral agent; antimetabolite; antineoplastic agent; antiviral agent; EC 1.3.5.2 [dihydroorotate dehydrogenase (quinone)] inhibitor; immunosuppressive agent; pyrimidine synthesis inhibitor |
| atovaquone | atovaquone : A naphthoquinone compound having a 4-(4-chlorophenyl)cyclohexyl group at the 2-position and a hydroxy substituent at the 3-position. Atovaquone: A hydroxynaphthoquinone that has antimicrobial activity and is being used in antimalarial protocols. | hydroxy-1,2-naphthoquinone | |
| hydrolapachol | hydrolapachol: inhibits mitochondrial respiratory chain | ||
| 3',4'-dihydroxyflavone | 3',4'-dihydroxyflavone: inhibitors of arachidonic acid peroxidation | ||
| nsc-126771 | dichloroallyl lawsone: structure | ||
| cyclo(l-phe-l-pro) | organic molecular entity | metabolite | |
| piperine | piperine : A N-acylpiperidine that is piperidine substituted by a (1E,3E)-1-(1,3-benzodioxol-5-yl)-5-oxopenta-1,3-dien-5-yl group at the nitrogen atom. It is an alkaloid isolated from the plant Piper nigrum. | benzodioxoles; N-acylpiperidine; piperidine alkaloid; tertiary carboxamide | food component; human blood serum metabolite; NF-kappaB inhibitor; plant metabolite |
| 2-phenylamino-4-methyl-5-acetylthiazole | 2-phenylamino-4-methyl-5-acetylthiazole: structure in first source | ||
| pd 156252 | |||
| n-(3,5-dichlorophenyl)-2-methyl-3-nitrobenzamide | N-(3,5-dichlorophenyl)-2-methyl-3-nitrobenzamide: inhibits dihydroorotate dehydrogenase from P. falciparum; structure in first source | ||
| isobavachalcone | isobavachalcone : A member of the class of chalcones that is trans-chalcone substituted by hydroxy groups at positions 4, 2' and 4' and a prenyl group at position 3'. isobavachalcone: RN given for (E)-isomer; structure in first source | chalcones; polyphenol | antibacterial agent; metabolite; platelet aggregation inhibitor |
| cyclosporine | ramihyphin A: one of the metabolites produced by Fusarium sp. S-435; RN given refers to cpd with unknown MF | homodetic cyclic peptide | anti-asthmatic drug; anticoronaviral agent; antifungal agent; antirheumatic drug; carcinogenic agent; dermatologic drug; EC 3.1.3.16 (phosphoprotein phosphatase) inhibitor; geroprotector; immunosuppressive agent; metabolite |
| ascofuranone | ascofuranone : A dihydroxybenzaldehyde that is 2,4-dihydroxybenzaldehyde which is substituted by a (2E,6E)-7-[(2S)-5,5-dimethyl-4-oxotetrahydrofuran-2-yl]-3-methylocta-2,6-dien-1-yl group at position 3, chlorine at position 5, and a methyl group at position 6. A meroterpenoid produced by the soil fungus, Acremonium sclerotigenum. It is a promising drug candidate against the tropical disease, African trypanosomiasis. ascofuranone: structure | dihydroxybenzaldehyde; meroterpenoid; monochlorobenzenes; olefinic compound; resorcinols; sesquiterpenoid; tetrahydrofuranone | angiogenesis inhibitor; antilipemic drug; antineoplastic agent; antiprotozoal drug; fungal metabolite |
| cyclo(prolyl-valyl) | piperazinone | metabolite | |
| cyclo(leucyl-prolyl) | cyclo(L-Leu-L-Pro) : A homodetic cyclic peptide composed from leucyl and prolyl residues. cyclo(leucyl-prolyl): structure in first source | dipeptide; homodetic cyclic peptide; pyrrolopyrazine | bacterial metabolite; marine metabolite |
| vidofludimus | vidofludimus: a dihydroorotate dehydrogenase inhibitor; structure in first source | ||
| ascochlorin | ascochlorin : A dihydroxybenzaldehyde that is 2,4-dihydroxybenzaldehyde which is substituted by a (1E,3E)-3-methyl-1-[(1R,2R,6R)-1,2,6-trimethyl-3-oxocyclohexyl]penta-1,3-dien-5-yl group at position 3, chlorine at position 5, and a methyl group at position 6. A meroterpenoid produced by several fungi including Ascochyta viciae . It exhibits anticancer, antifungal and antiprotozoal activities. ascochlorin: structure in first source | cyclohexanones; dihydroxybenzaldehyde; meroterpenoid; monochlorobenzenes; olefinic compound; resorcinols; sesquiterpenoid | angiogenesis inhibitor; antifungal agent; antineoplastic agent; antiprotozoal drug; fungal metabolite |
| brequinar sodium | brequinar sodium : An organic sodium salt of brequinar. | organic sodium salt | anticoronaviral agent; antimetabolite; antineoplastic agent; antiviral agent; EC 1.3.5.2 [dihydroorotate dehydrogenase (quinone)] inhibitor; immunosuppressive agent; pyrimidine synthesis inhibitor |
| dsm 74 | |||
| teriflunomide | (trifluoromethyl)benzenes; aromatic amide; enamide; enol; nitrile; secondary carboxamide | drug metabolite; EC 1.3.98.1 [dihydroorotate oxidase (fumarate)] inhibitor; hepatotoxic agent; non-steroidal anti-inflammatory drug; tyrosine kinase inhibitor | |
| 2-ethylphenyl 4-(3-ethylureido)benzenesulfonate | 2-ethylphenyl 4-(3-ethylureido)benzenesulfonate: has antineoplastic activity; structure in first source |