Target type: molecularfunction
Binding to a molybdopterin cofactor (Moco), essential for the catalytic activity of some enzymes, e.g. sulfite oxidase, xanthine dehydrogenase, and aldehyde oxidase. The cofactor consists of a mononuclear molybdenum (Mo-molybdopterin) or tungsten ion (W-molybdopterin) coordinated by one or two molybdopterin ligands. [ISSN:09498257]
Molybdopterin cofactor binding is a molecular function that involves the interaction of proteins with molybdopterin, a complex organic molecule essential for the activity of a wide range of enzymes. Molybdopterin consists of a pterin ring, a dithiolene group, and a phosphate group. It acts as a cofactor, meaning it helps enzymes catalyze specific chemical reactions. In these reactions, molybdenum, a transition metal, is coordinated within the molybdopterin cofactor.
Molybdopterin-containing enzymes, also known as molybdenum enzymes, play crucial roles in various metabolic pathways, including:
* **Nitrogen metabolism:** Enzymes like nitrogenase, which is involved in nitrogen fixation, and nitrate reductase, which reduces nitrate to nitrite, require molybdopterin for their activity.
* **Sulfur metabolism:** Sulfite oxidase, responsible for oxidizing sulfite to sulfate, relies on molybdopterin.
* **Carbon metabolism:** Xanthine oxidase, an enzyme involved in purine metabolism, and aldehyde oxidase, which oxidizes aldehydes to carboxylic acids, utilize molybdopterin.
* **Other metabolic pathways:** Enzymes involved in the metabolism of drugs, xenobiotics, and other compounds can also be molybdopterin-dependent.
The binding of molybdopterin to proteins is crucial for the proper functioning of these enzymes. The dithiolene group of molybdopterin forms a strong coordination bond with molybdenum, creating a molybdenum-containing active site. The pterin ring and phosphate group contribute to the overall stability and conformation of the enzyme, facilitating the interaction with substrates.
Deficiencies in molybdopterin biosynthesis or defects in its binding to enzymes can lead to severe health consequences, including developmental problems, neurological disorders, and metabolic imbalances. The understanding of molybdopterin cofactor binding is essential for comprehending the function of these vital enzymes and for developing therapies for related diseases.'
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| Protein | Definition | Taxonomy |
|---|---|---|
| Xanthine dehydrogenase/oxidase | A xanthine dehydrogenase/oxidase that is encoded in the genome of cow. [PMID:8708081, PRO:HJD] | Bos taurus (cattle) |
| Aldehyde oxidase | An aldehyde oxidase that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q06278] | Homo sapiens (human) |
| Xanthine dehydrogenase/oxidase | A xanthine dehydrogenase/oxidase that is encoded in the genome of human. [PRO:DNx, UniProtKB:P47989] | Homo sapiens (human) |
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| protocatechuic acid | 3,4-dihydroxybenzoic acid : A dihydroxybenzoic acid in which the hydroxy groups are located at positions 3 and 4. protocatechuic acid: RN given refers to parent cpd; structure | catechols; dihydroxybenzoic acid | antineoplastic agent; EC 1.1.1.25 (shikimate dehydrogenase) inhibitor; EC 1.14.11.2 (procollagen-proline dioxygenase) inhibitor; human xenobiotic metabolite; plant metabolite |
| adenine | 6-aminopurines; purine nucleobase | Daphnia magna metabolite; Escherichia coli metabolite; human metabolite; mouse metabolite; Saccharomyces cerevisiae metabolite | |
| quinacrine | quinacrine : A member of the class of acridines that is acridine substituted by a chloro group at position 6, a methoxy group at position 2 and a [5-(diethylamino)pentan-2-yl]nitrilo group at position 9. Quinacrine: An acridine derivative formerly widely used as an antimalarial but superseded by chloroquine in recent years. It has also been used as an anthelmintic and in the treatment of giardiasis and malignant effusions. It is used in cell biological experiments as an inhibitor of phospholipase A2. | acridines; aromatic ether; organochlorine compound; tertiary amino compound | antimalarial; EC 1.8.1.12 (trypanothione-disulfide reductase) inhibitor |
| salicylic acid | Scalp: The outer covering of the calvaria. It is composed of several layers: SKIN; subcutaneous connective tissue; the occipitofrontal muscle which includes the tendinous galea aponeurotica; loose connective tissue; and the pericranium (the PERIOSTEUM of the SKULL). | monohydroxybenzoic acid | algal metabolite; antifungal agent; antiinfective agent; EC 1.11.1.11 (L-ascorbate peroxidase) inhibitor; keratolytic drug; plant hormone; plant metabolite |
| taxifolin | 3'-hydroxyflavanones; 4'-hydroxyflavanones; dihydroflavonols; pentahydroxyflavanone; secondary alpha-hydroxy ketone | ||
| 5,6-dimethylbenzimidazole | 5,6-dimethylbenzimidazole : A dimethylbenzimidazole carrying methyl substituents at positions 5 and 6. 5,6-dimethylbenzimidazole: RN given refers to parent cpd | dimethylbenzimidazole | Escherichia coli metabolite; human metabolite |
| niacin | Niacin: A water-soluble vitamin of the B complex occurring in various animal and plant tissues. It is required by the body for the formation of coenzymes NAD and NADP. It has PELLAGRA-curative, vasodilating, and antilipemic properties. nicotinic acid : A pyridinemonocarboxylic acid that is pyridine in which the hydrogen at position 3 is replaced by a carboxy group. vitamin B3 : Any member of a group of vitamers that belong to the chemical structural class called pyridines that exhibit biological activity against vitamin B3 deficiency. Vitamin B3 deficiency causes a condition known as pellagra whose symptoms include depression, dermatitis and diarrhea. The vitamers include nicotinic acid and nicotinamide (and their ionized and salt forms). | pyridine alkaloid; pyridinemonocarboxylic acid; vitamin B3 | antidote; antilipemic drug; EC 3.5.1.19 (nicotinamidase) inhibitor; Escherichia coli metabolite; human urinary metabolite; metabolite; mouse metabolite; plant metabolite; vasodilator agent |
| pyridoxal | hydroxymethylpyridine; methylpyridines; monohydroxypyridine; pyridinecarbaldehyde; vitamin B6 | cofactor; Escherichia coli metabolite; human metabolite; mouse metabolite; Saccharomyces cerevisiae metabolite | |
| xanthine | 7H-xanthine : An oxopurine in which the purine ring is substituted by oxo groups at positions 2 and 6 and N-7 is protonated. 9H-xanthine : An oxopurine in which the purine ring is substituted by oxo groups at positions 2 and 6 and N-9 is protonated. | xanthine | Saccharomyces cerevisiae metabolite |
| amsacrine | amsacrine : A sulfonamide that is N-phenylmethanesulfonamide substituted by a methoxy group at position 3 and an acridin-9-ylamino group at position 4. It exhibits antineoplastic activity. Amsacrine: An aminoacridine derivative that intercalates into DNA and is used as an antineoplastic agent. | acridines; aromatic ether; sulfonamide | antineoplastic agent; EC 5.99.1.3 [DNA topoisomerase (ATP-hydrolysing)] inhibitor |
| benzamidine | benzamidine : A carboxamidine that is benzene carrying an amidino group. benzamidine: RN given refers to parent cpd | benzenes; carboxamidine | serine protease inhibitor |
| beta-naphthoflavone | beta-naphthoflavone : An extended flavonoid resulting from the formal fusion of a benzene ring with the f side of flavone. beta-Naphthoflavone: A polyaromatic hydrocarbon inducer of P4501A1 and P4501A2 cytochromes. (Proc Soc Exp Biol Med 1994 Dec:207(3):302-308) | extended flavonoid; naphtho-gamma-pyrone; organic heterotricyclic compound | aryl hydrocarbon receptor agonist |
| chlorpromazine | chlorpromazine : A substituted phenothiazine in which the ring nitrogen at position 10 is attached to C-3 of an N,N-dimethylpropanamine moiety. Chlorpromazine: The prototypical phenothiazine antipsychotic drug. Like the other drugs in this class chlorpromazine's antipsychotic actions are thought to be due to long-term adaptation by the brain to blocking DOPAMINE RECEPTORS. Chlorpromazine has several other actions and therapeutic uses, including as an antiemetic and in the treatment of intractable hiccup. | organochlorine compound; phenothiazines; tertiary amine | anticoronaviral agent; antiemetic; dopaminergic antagonist; EC 3.4.21.26 (prolyl oligopeptidase) inhibitor; phenothiazine antipsychotic drug |
| cimetidine | cimetidine : A member of the class of guanidines that consists of guanidine carrying a methyl substituent at position 1, a cyano group at position 2 and a 2-{[(5-methyl-1H-imidazol-4-yl)methyl]sulfanyl}ethyl group at position 3. It is a H2-receptor antagonist that inhibits the production of acid in stomach. Cimetidine: A histamine congener, it competitively inhibits HISTAMINE binding to HISTAMINE H2 RECEPTORS. Cimetidine has a range of pharmacological actions. It inhibits GASTRIC ACID secretion, as well as PEPSIN and GASTRIN output. | aliphatic sulfide; guanidines; imidazoles; nitrile | adjuvant; analgesic; anti-ulcer drug; H2-receptor antagonist; P450 inhibitor |
| vitamin k 3 | Vitamin K 3: A synthetic naphthoquinone without the isoprenoid side chain and biological activity, but can be converted to active vitamin K2, menaquinone, after alkylation in vivo. | 1,4-naphthoquinones; vitamin K | angiogenesis inhibitor; antineoplastic agent; EC 3.4.22.69 (SARS coronavirus main proteinase) inhibitor; human urinary metabolite; nutraceutical |
| perphenazine | perphenazine : A phenothiazine derivative in which the phenothiazine tricycle carries a chloro substituent at the 2-position and a 3-[4-(2-hydroxyethyl)piperazin-1-yl]propyl group at N-10. Perphenazine: An antipsychotic phenothiazine derivative with actions and uses similar to those of CHLORPROMAZINE. | N-(2-hydroxyethyl)piperazine; N-alkylpiperazine; organochlorine compound; phenothiazines | antiemetic; dopaminergic antagonist; phenothiazine antipsychotic drug |
| proadifen | Proadifen: An inhibitor of drug metabolism and CYTOCHROME P-450 ENZYME SYSTEM activity. | diarylmethane | |
| propyl gallate | Propyl Gallate: Antioxidant for foods, fats, oils, ethers, emulsions, waxes, and transformer oils. | trihydroxybenzoic acid | |
| raloxifene | raloxifene : A member of the class of 1-benzothiophenes that is 1-benzothiophene in which the hydrogens at positions 2, 3, and 6 have been replaced by p-hydroxyphenyl, p-[2-(piperidin-1-yl)ethoxy]benzoyl, and hydroxy groups, respectively. | 1-benzothiophenes; aromatic ketone; N-oxyethylpiperidine; phenols | bone density conservation agent; estrogen antagonist; estrogen receptor modulator |
| thioridazine | thioridazine : A phenothiazine derivative having a methylsulfanyl subsitituent at the 2-position and a (1-methylpiperidin-2-yl)ethyl] group at the N-10 position. Thioridazine: A phenothiazine antipsychotic used in the management of PHYCOSES, including SCHIZOPHRENIA. | phenothiazines; piperidines | alpha-adrenergic antagonist; dopaminergic antagonist; EC 1.8.1.12 (trypanothione-disulfide reductase) inhibitor; EC 3.4.21.26 (prolyl oligopeptidase) inhibitor; first generation antipsychotic; H1-receptor antagonist; serotonergic antagonist |
| ethinyl estradiol | 17alpha-ethynylestradiol : A 3-hydroxy steroid that is estradiol substituted by a ethynyl group at position 17. It is a xenoestrogen synthesized from estradiol and has been shown to exhibit high estrogenic potency on oral administration. Ethinyl Estradiol: A semisynthetic alkylated ESTRADIOL with a 17-alpha-ethinyl substitution. It has high estrogenic potency when administered orally, and is often used as the estrogenic component in ORAL CONTRACEPTIVES. | 17-hydroxy steroid; 3-hydroxy steroid; terminal acetylenic compound | xenoestrogen |
| methyl gallate | methyl 3,4,5-trihydroxybenzoate : A gallate ester obtained by the formal condensation of gallic acid with methanol. It exhibits anti-oxidant, anti-tumor, anti-microbial and anti-inflammatory properties. methyl gallate: has both immunosuppressive and phytogenic antineoplastic activities; isolated from Acer saccharinum | gallate ester | anti-inflammatory agent; antioxidant; plant metabolite |
| methylparaben | methylparaben : A 4-hydroxybenzoate ester resulting from the formal condensation of the carboxy group of 4-hydroxybenzoic acid with methanol. It is the most frequently used antimicrobial preservative in cosmetics. It occurs naturally in several fruits, particularly in blueberries. methylparaben: used as a preservative in cosmetics but potentiates UV-induced damage of skin; RN given refers to parent cpd | paraben | antifungal agent; antimicrobial food preservative; neuroprotective agent; plant metabolite |
| vanillic acid | vanillic acid : A monohydroxybenzoic acid that is 4-hydroxybenzoic acid substituted by a methoxy group at position 3. Vanillic Acid: A flavoring agent. It is the intermediate product in the two-step bioconversion of ferulic acid to vanillin. (J Biotechnol 1996;50(2-3):107-13). | methoxybenzoic acid; monohydroxybenzoic acid | plant metabolite |
| catechin | (+)-catechin : The (+)-enantiomer of catechin and a polyphenolic antioxidant plant metabolite. catechin : Members of the class of hydroxyflavan that have a flavan-3-ol skeleton and its substituted derivatives. Catechin: An antioxidant flavonoid, occurring especially in woody plants as both (+)-catechin and (-)-epicatechin (cis) forms. rac-catechin : A racemate comprising equimolar amounts of (+)- and (-)-catechin | catechin | antioxidant; plant metabolite |
| 2-aminopurine | 2-aminopurine : The parent compound of the 2-aminopurines, comprising a purine core carrying an amino substituent at the 2-position. 2-Aminopurine: A purine that is an isomer of ADENINE (6-aminopurine). aminopurine : Any purine having at least one amino substituent. | 2-aminopurines; nucleobase analogue | antimetabolite |
| 3-hydroxyflavone | 3-hydroxyflavone: structure given in first source flavonol : A monohydroxyflavone that is the 3-hydroxy derivative of flavone. | flavonols; monohydroxyflavone | |
| alpha-naphthoflavone | alpha-naphthoflavone : An extended flavonoid resulting from the formal fusion of a benzene ring with the h side of flavone. A synthetic compound, it is an inhibitor of aromatase (EC 1.14.14.14). alpha-naphthoflavone: inhibits P4501A1 and P4501A2; stimulates some activities of P4503A4 | extended flavonoid; naphtho-gamma-pyrone; organic heterotricyclic compound | aryl hydrocarbon receptor agonist; aryl hydrocarbon receptor antagonist; EC 1.14.14.14 (aromatase) inhibitor |
| 5-methylbenzimidazole | 5-methyl-1H-benzimidazole : A member of the class of imidazoles that is 1H-benzimidazole in which the hydrogen at position 5 is substituted by a methyl group. 5-methylbenzimidazole: structure in first source | imidazoles | |
| isovanillin | isovanillin : A member of the class of benzaldehydes that is 4-methoxybenzaldehyde substituted by a hydroxy group at position 3. It is an inhibitor of aldehyde oxidase. isovanillin: inhibits aldehyde oxidase | benzaldehydes; monomethoxybenzene; phenols | animal metabolite; antidiarrhoeal drug; antifungal agent; EC 1.2.3.1 (aldehyde oxidase) inhibitor; HIV protease inhibitor; plant metabolite |
| 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 | |
| butylated hydroxyanisole | |||
| 2,6-diaminopurine | 9H-purine-2,6-diamine : A member of the class of 2,6-diaminopurines that is 9H-purine in which the hydrogens at positions 2 and 6 are replaced by amino groups. | 2,6-diaminopurines; primary amino compound | antineoplastic agent |
| 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid | chromanol; monocarboxylic acid; phenols | antioxidant; ferroptosis inhibitor; neuroprotective agent; radical scavenger; Wnt signalling inhibitor | |
| staurosporine | indolocarbazole alkaloid; organic heterooctacyclic compound | apoptosis inducer; bacterial metabolite; EC 2.7.11.13 (protein kinase C) inhibitor; geroprotector | |
| 1,2,3,4,6-pentakis-O-galloyl-beta-D-glucose | 1,2,3,4,6-pentakis-O-galloyl-beta-D-glucose : A galloyl-beta-D-glucose compound having five galloyl groups in the 1-, 2-, 3-, 4- and 6-positions. pentagalloylglucose: pentahydroxy gallic acid ester of glucose; a phytogenic antineoplastic agent and antibacterial agent | gallate ester; galloyl beta-D-glucose | anti-inflammatory agent; antineoplastic agent; geroprotector; hepatoprotective agent; plant metabolite; radiation protective agent; radical scavenger |
| o-(6)-methylguanine | 6-O-methylguanine : A methylguanine in which the methyl group is positioned on the oxygen at position 6. Formed in DNA by alkylation of the oxygen atom of guanine, most often by N-nitroso compounds and sometimes due to methylation by other compounds such as endogenous S-adenosylmethionine, it base-pairs to thymine rather than cytidine, causing a G:C to A:T transition in DNA. methylguanine : A 2-aminopurine that is guanine bearing a single methyl substituent. O-(6)-methylguanine: structure | methylguanine | mutagen |
| secoisolariciresinol | (-)-secoisolariciresinol : An enantiomer of secoisolariciresinol having (-)-(2R,3R)-configuration. secoisolariciresinol : A lignan that is butane-1,4-diol in which the 2 and 3 positions are substituted by 4-hydroxy-3-methoxybenzyl groups secoisolariciresinol: RN given refers to ((R-(R*,R*))-isomer); RN for cpd without isomeric designation not available 8/89; precursor of lignans found in human urine; structure given in first source | secoisolariciresinol | antidepressant; phytoestrogen; plant metabolite |
| 2,4,6-trihydroxybenzoic acid | hydroxybenzoic acid | ||
| tangeretin | pentamethoxyflavone : A methoxyflavone that is flavone substituted by a five methoxy groups. tangeretin : A pentamethoxyflavone flavone with methoxy groups at positions 4', 5, 6 , 7 and 8. tangeretin: structure given in first source; from citrus plants; inhibits invasion of MO4 mouse cells into embryonic chick heart in vitro | pentamethoxyflavone | antineoplastic agent; plant metabolite |
| 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 |
| 2-hydroxychavicol | 2-hydroxychavicol: antimutagen from betel leaf; structure given in first source | ||
| epicatechin | (-)-epicatechin : A catechin with (2R,3R)-configuration. | catechin; polyphenol | antioxidant |
| gallocatechol | (-)-epigallocatechin : A flavan-3,3',4',5,5',7-hexol having (2R,3R)-configuration. | catechin; flavan-3,3',4',5,5',7-hexol | antioxidant; food component; plant metabolite |
| nobiletin | nobiletin : A methoxyflavone that is flavone substituted by methoxy groups at positions 5, 6, 7, 8, 3' and 4' respectively. | methoxyflavone | antineoplastic agent; plant metabolite |
| 5-bromocytosine | |||
| 4-aminopyrazolo(3,4-d)pyrimidine | 4-aminopyrazolo(3,4-d)pyrimidine: adenine analog which suppresses growth of E coli & Bacillus cereus; inhibits cell growth & purine biosynthesis in rat hepatoma | ||
| 1-methylxanthine | 1-methyl-7H-xanthine : A 1-methylxanthine tautomer where the imidazole proton is located at the 7-position. 1-methylxanthine : A monomethylxanthine having the methyl group located at the 1-position. It is a metabolite of caffeine in humans. 1-methylxanthine: urinary metabolite of caffeine | 1-methylxanthine | mouse metabolite |
| monocerin | monocerin: structure in first source | hydroxybenzoic acid | metabolite |
| geniposide | terpene glycoside | ||
| liquiritigenin | 4',7-dihydroxyflavanone : A dihydroxyflavanone in which the two hydroxy substituents are located at positions 4' and 7. liquiritigenin : A dihydroxyflavanone compound having the two hydroxy substituents at the 4'- and 7-positions. Isolated from the root of Glycyrrhizae uralensis, it is a selective agonist for oestrogen receptor beta. liquiritigenin: structure given in first source; isolated from Pterocarpus marsupium | 4',7-dihydroxyflavanone | hormone agonist; plant metabolite |
| aromadedrin | (+)-dihydrokaempferol : A tetrahydroxyflavanone having hydroxy groupa at the 3-, 4'-, 5- and 7-positions. aromadedrin: inhibits protein kinase C; the dihydro makes it a flavone rather than a flavonol | 4'-hydroxyflavanones; dihydroflavonols; secondary alpha-hydroxy ketone; tetrahydroxyflavanone | metabolite |
| febuxostat | febuxostat : A 1,3-thiazolemonocarboxylic acid that is 4-methyl-1,3-thiazole-5-carboxylic acid which is substituted by a 3-cyano-4-(2-methylpropoxy)phenyl group at position 2. It is an orally-active, potent, and selective xanthine oxidase inhibitor used for the treatment of chronic hyperuricaemia in patients with gout. Febuxostat: A thiazole derivative and inhibitor of XANTHINE OXIDASE that is used for the treatment of HYPERURICEMIA in patients with chronic GOUT. | 1,3-thiazolemonocarboxylic acid; aromatic ether; nitrile | EC 1.17.3.2 (xanthine oxidase) inhibitor |
| cirsimarin | cirsimarin: a flavone glycoside from Microtea debilis; structure given in first source | flavonoids; glycoside | |
| 4'-hydroxyflavanone | 4'-hydroxyflavanone: structure in first source 4'-hydroxyflavanones : Any hydroxyflavanone having a hydroxy substituent located at position 4'. | 4'-hydroxyflavanones; monohydroxyflavanone | |
| rubrofusarin B | rubrofusarin B : A benzochromenone that is rubrofusarin in which the hydroxy group at position 6 has been converted to the corresponding methyl ether. | aromatic ether; benzochromenone; naphtho-gamma-pyrone; phenols; polyketide | Aspergillus metabolite |
| yemuoside ym(10) | yemuoside YM(10): from Stauntonia chinensis Decne; structure given in first source | ||
| 1-acetyl-3,5-diphenyl-4,5-dihydro-(1h)-pyrazole | |||
| methyl 3,4-dihydroxybenzoate | catechols; methyl ester | antioxidant; neuroprotective agent; plant metabolite | |
| naringenin | (S)-naringenin : The (S)-enantiomer of naringenin. | (2S)-flavan-4-one; naringenin | expectorant; plant metabolite |
| geniposidic acid | terpene glycoside | ||
| ferulic acid | ferulate : A monocarboxylic acid anion obtained by the deprotonation of the carboxy group of ferulic acid. | ferulic acids | anti-inflammatory agent; antioxidant; apoptosis inhibitor; cardioprotective agent; MALDI matrix material; plant metabolite |
| diethylstilbestrol | diethylstilbestrol : An olefinic compound that is trans-hex-3-ene in which the hydrogens at positions 3 and 4 have been replaced by p-hydroxyphenyl groups. Diethylstilbestrol: A synthetic nonsteroidal estrogen used in the treatment of menopausal and postmenopausal disorders. It was also used formerly as a growth promoter in animals. According to the Fourth Annual Report on Carcinogens (NTP 85-002, 1985), diethylstilbestrol has been listed as a known carcinogen. (Merck, 11th ed) | olefinic compound; polyphenol | antifungal agent; antineoplastic agent; autophagy inducer; calcium channel blocker; carcinogenic agent; EC 1.1.1.146 (11beta-hydroxysteroid dehydrogenase) inhibitor; EC 3.6.3.10 (H(+)/K(+)-exchanging ATPase) inhibitor; endocrine disruptor; xenoestrogen |
| y-700 | |||
| trans-4-coumaric acid | 4-coumaric acid : A coumaric acid in which the hydroxy substituent is located at C-4 of the phenyl ring. hydroxycinnamic acid : Any member of the class of cinnamic acids carrying one or more hydroxy substituents. trans-4-coumaric acid : The trans-isomer of 4-coumaric acid. | 4-coumaric acid | food component; mouse metabolite; plant metabolite |
| 2'-hydroxychalcone | 2'-hydroxychalcone : A member of the class of chalcones that is trans-chalcone substituted by a hydroxy group at position 2'. | chalcones; phenols | anti-inflammatory agent |
| 2,2'-dihydroxychalcone | 2,2'-dihydroxychalcone: an antineoplastic agent; structure in first source | ||
| isoliquiritigenin | chalcones | antineoplastic agent; biological pigment; EC 1.14.18.1 (tyrosinase) inhibitor; GABA modulator; geroprotector; metabolite; NMDA receptor antagonist | |
| 1-benzyl-2-phenylbenzimidazole | 1-benzyl-2-phenylbenzimidazole: has antineoplastic activity; structure in first source | ||
| thioguanine anhydrous | Thioguanine: An antineoplastic compound which also has antimetabolite action. The drug is used in the therapy of acute leukemia. tioguanine : A 2-aminopurine that is the 6-thiono derivative of 2-amino-1,9-dihydro-6H-purine. Incorporates into DNA and inhibits synthesis. Used in the treatment of leukaemia. | 2-aminopurines | anticoronaviral agent; antimetabolite; antineoplastic agent |
| 6-(4-methoxyphenyl)pyrimidine-2,4-diamine | pyrimidines | ||
| silybin | |||
| merbarone | merbarone: structure given in first source | ||
| 2',3-dihydroxychalcone | 2',3-dihydroxychalcone: structure in first source | ||
| 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 | |
| acacetin | 5,7-dihydroxy-4'-methoxyflavone : A monomethoxyflavone that is the 4'-methyl ether derivative of apigenin. | dihydroxyflavone; monomethoxyflavone | anticonvulsant; plant metabolite |
| apigenin | Chamomile: Common name for several daisy-like plants (MATRICARIA; TRIPLEUROSPERMUM; ANTHEMIS; CHAMAEMELUM) native to Europe and Western Asia, now naturalized in the United States and Australia. | trihydroxyflavone | antineoplastic agent; metabolite |
| luteolin | 3'-hydroxyflavonoid; tetrahydroxyflavone | angiogenesis inhibitor; anti-inflammatory agent; antineoplastic agent; apoptosis inducer; c-Jun N-terminal kinase inhibitor; EC 2.3.1.85 (fatty acid synthase) inhibitor; immunomodulator; nephroprotective agent; plant metabolite; radical scavenger; vascular endothelial growth factor receptor antagonist | |
| quercitrin | alpha-L-rhamnoside; monosaccharide derivative; quercetin O-glycoside; tetrahydroxyflavone | antileishmanial agent; antioxidant; EC 1.1.1.184 [carbonyl reductase (NADPH)] inhibitor; EC 1.1.1.21 (aldehyde reductase) inhibitor; EC 1.14.18.1 (tyrosinase) inhibitor; plant metabolite | |
| coniferaldehyde | coniferaldehyde: from aqueous extract of Senra incana coniferyl aldehyde : A member of the class of cinnamaldehydes that is cinnamaldehyde substituted by a hydroxy group at position 4 and a methoxy group at position 3. | cinnamaldehydes; guaiacols; phenylpropanoid | antifungal agent; plant metabolite |
| daphnetin | hydroxycoumarin | ||
| luteolin-7-glucoside | luteolin 7-O-beta-D-glucoside : A glycosyloxyflavone that is luteolin substituted by a beta-D-glucopyranosyl moiety at position 7 via a glycosidic linkage. luteolin-7-glucoside: has both antiasthmatic and antineoplastic activities; has 3C protease inhibitory activity; isolated from Ligustrum lucidum | beta-D-glucoside; glycosyloxyflavone; monosaccharide derivative; trihydroxyflavone | antioxidant; plant metabolite |
| chrysoeriol | 4',5,7-trihydroxy-3'-methoxyflavone : The 3'-O-methyl derivative of luteolin. chrysoeriol: isolated from leaves of Eurya japonica & E. emarginata | monomethoxyflavone; trihydroxyflavone | antineoplastic agent; antioxidant; metabolite |
| quercetin 3-o-methyl ether | 3',4',5,7-tetrahydroxy-3-methoxyflavone : A tetrahydroxyflavone having the 4-hydroxy groups located at the 3'- 4'- 5- and 7-positions as well as a methoxy group at the 2-position. quercetin 3-O-methyl ether: from Rhamnus species; structure in first source | monomethoxyflavone; tetrahydroxyflavone | antimicrobial agent; metabolite |
| quercetin 3-o-glucopyranoside | quercetin 3-O-beta-D-glucopyranoside : A quercetin O-glucoside that is quercetin with a beta-D-glucosyl residue attached at position 3. Isolated from Lepisorus contortus, it exhibits antineoplastic activityand has been found to decrease the rate of polymerization and sickling of red blood cells quercetin 3-O-glucopyranoside: structure in first source | beta-D-glucoside; monosaccharide derivative; quercetin O-glucoside; tetrahydroxyflavone | antineoplastic agent; antioxidant; antipruritic drug; bone density conservation agent; geroprotector; histamine antagonist; osteogenesis regulator; plant metabolite |
| rutin | Hydroxyethylrutoside: Monohydroxyethyl derivative of rutin. Peripheral circulation stimulant used in treatment of venous disorders. | disaccharide derivative; quercetin O-glucoside; rutinoside; tetrahydroxyflavone | antioxidant; metabolite |
| 3-methylkaempferol | 3-methoxyapigenin : A trihydroxyflavone that is apigenin substituted by a methoxy group at position 3. 3-methylkaempferol: structure in first source | monomethoxyflavone; trihydroxyflavone | plant metabolite |
| kaempferol | 7-hydroxyflavonol; flavonols; tetrahydroxyflavone | antibacterial agent; geroprotector; human blood serum metabolite; human urinary metabolite; human xenobiotic metabolite; plant metabolite | |
| harmine | harmine : A harmala alkaloid in which the harman skeleton is methoxy-substituted at C-7. Harmine: Alkaloid isolated from seeds of PEGANUM HARMALA; ZYGOPHYLLACEAE. It is identical to banisterine, or telepathine, from Banisteria caapi and is one of the active ingredients of hallucinogenic drinks made in the western Amazon region from related plants. It has no therapeutic use, but (as banisterine) was hailed as a cure for postencephalitic PARKINSON DISEASE in the 1920's. | harmala alkaloid | anti-HIV agent; EC 1.4.3.4 (monoamine oxidase) inhibitor; metabolite |
| genistein | 7-hydroxyisoflavones | antineoplastic agent; EC 5.99.1.3 [DNA topoisomerase (ATP-hydrolysing)] inhibitor; geroprotector; human urinary metabolite; phytoestrogen; plant metabolite; tyrosine kinase inhibitor | |
| butein | chalcones; polyphenol | antineoplastic agent; antioxidant; EC 1.1.1.21 (aldehyde reductase) inhibitor; geroprotector; hypoglycemic agent; plant metabolite; radiosensitizing agent; tyrosine kinase inhibitor | |
| okanin | okanin : A member of the class of chalcones that is trans-chalcone substituted by hydroxy groups at positions 3, 4, 2', 3', and 4' respectively. okanin: hypoglycemic from Coreopsis tinctoria; structure in first source | benzenetriol; chalcones | plant metabolite |
| sulfuretin | sulfuretin: the chalcone C ring closes into a 5 instead of the more typical 6 membered ring leaving a phenyl methane at the 2 position instead of the typical phenyl | 1-benzofurans | |
| 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 |
| amentoflavone | biflavonoid; hydroxyflavone; ring assembly | angiogenesis inhibitor; antiviral agent; cathepsin B inhibitor; P450 inhibitor; plant metabolite | |
| axillarin | axillarin : A dimethoxyflavone that is the 3,6-dimethyl ether derivative of quercetagetin. axillarin: isolated from Pulicaria crispa or Filifdium sibiricum; structure given in first source | dimethoxyflavone; tetrahydroxyflavone | plant metabolite |
| baicalein | trihydroxyflavone | angiogenesis inhibitor; anti-inflammatory agent; antibacterial agent; anticoronaviral agent; antifungal agent; antineoplastic agent; antioxidant; apoptosis inducer; EC 1.13.11.31 (arachidonate 12-lipoxygenase) inhibitor; EC 1.13.11.33 (arachidonate 15-lipoxygenase) inhibitor; EC 3.4.21.26 (prolyl oligopeptidase) inhibitor; EC 3.4.22.69 (SARS coronavirus main proteinase) inhibitor; EC 4.1.1.17 (ornithine decarboxylase) inhibitor; ferroptosis inhibitor; geroprotector; hormone antagonist; plant metabolite; prostaglandin antagonist; radical scavenger | |
| chrysin | chrysin : A dihydroxyflavone in which the two hydroxy groups are located at positions 5 and 7. | 7-hydroxyflavonol; dihydroxyflavone | anti-inflammatory agent; antineoplastic agent; antioxidant; EC 2.7.11.18 (myosin-light-chain kinase) inhibitor; hepatoprotective agent; plant metabolite |
| fisetin | 3'-hydroxyflavonoid; 7-hydroxyflavonol; tetrahydroxyflavone | anti-inflammatory agent; antioxidant; EC 5.99.1.3 [DNA topoisomerase (ATP-hydrolysing)] inhibitor; geroprotector; metabolite; plant metabolite | |
| galangin | 5,7-dihydroxyflavonol: antimicrobial from the twigs of Populus nigra x Populus deltoides; structure in first source galangin : A 7-hydroxyflavonol with additional hydroxy groups at positions 3 and 5 respectively; a growth inhibitor of breast tumor cells. | 7-hydroxyflavonol; trihydroxyflavone | antimicrobial agent; EC 3.1.1.3 (triacylglycerol lipase) inhibitor; plant metabolite |
| 3-methylquercetin | isorhamnetin : A monomethoxyflavone that is quercetin in which the hydroxy group at position 3' is replaced by a methoxy group. | 7-hydroxyflavonol; monomethoxyflavone; tetrahydroxyflavone | anticoagulant; EC 1.14.18.1 (tyrosinase) inhibitor; metabolite |
| norathyriol | norathyriol : A member of the class of xanthones that is 9H-xanthen-9-one substituted by hydroxy groups at positions 1, 3, 6 and 7. Isolated from Garcinia mangostana and Maclura pomifera, it exhibits inhibitory activity against protein kinase C. norathyriol: from Gentinanaceae; has vasorelaxing action on rat thoracic aorta; structure given in first source | polyphenol; xanthones | antineoplastic agent; EC 2.7.11.13 (protein kinase C) inhibitor; plant metabolite |
| morin | morin : A pentahydroxyflavone that is 7-hydroxyflavonol bearing three additional hydroxy substituents at positions 2' 4' and 5. morin: a light yellowish pigment found in the wood of old fustic (Chlorophora tinctoria) | 7-hydroxyflavonol; pentahydroxyflavone | angiogenesis modulating agent; anti-inflammatory agent; antibacterial agent; antihypertensive agent; antineoplastic agent; antioxidant; EC 5.99.1.2 (DNA topoisomerase) inhibitor; hepatoprotective agent; metabolite; neuroprotective agent |
| myricetin | 7-hydroxyflavonol; hexahydroxyflavone | antineoplastic agent; antioxidant; cyclooxygenase 1 inhibitor; food component; geroprotector; hypoglycemic agent; plant metabolite | |
| robinetin | robinetin : A pentahydroxyflavone that is flavone substituted by hydroxy groups at positions 3, 7, 3, 4' and 5'. robinetin: structure given in first source | 7-hydroxyflavonol; pentahydroxyflavone | plant metabolite |
| santin | santin : A trimethoxyflavone that is flavone substituted by methoxy groups at positions 3, 6 and 4' and hydroxy groups at positions 5 and 7 respectively. santin: from Tanacetum microphyllum; structure given in first source | dihydroxyflavone; trimethoxyflavone | plant metabolite |
| scutellarein | scutellarein : Flavone substituted with hydroxy groups at C-4', -5, -6 and -7. scutellarein: aglycone of scutellarin from Scutellaria baicalensis; carthamidin is 2S isomer of scutellarein; do not confuse with isoscutellarein and/or isocarthamidin which are respective regioisomers, or with the scutelarin protein | tetrahydroxyflavone | metabolite |
| wogonin | wogonin : A dihydroxy- and monomethoxy-flavone in which the hydroxy groups are positioned at C-5 and C-7 and the methoxy group is at C-8. wogonin: structure in first source | dihydroxyflavone; monomethoxyflavone | angiogenesis inhibitor; antineoplastic agent; cyclooxygenase 2 inhibitor; plant metabolite |
| daidzein | 7-hydroxyisoflavones | antineoplastic agent; EC 2.7.7.7 (DNA-directed DNA polymerase) inhibitor; EC 3.2.1.20 (alpha-glucosidase) inhibitor; phytoestrogen; plant metabolite | |
| 7-hydroxyflavone | 7-hydroxyflavone : A hydroxyflavonoid in which the flavone nucleus is substituted at position 7 by a hydroxy group. | hydroxyflavonoid | |
| veronicastroside | luteolin 7-O-neohesperidoside : A disaccharide derivative that is luteolin substituted by a 2-O-(alpha-L-rhamnopyranosyl)-beta-D-glucopyranosyl moiety at position 7 via a glycosidic linkage. veronicastroside: a flavonoid; second source Yak. Zas. shows same melting point, absorption, Rf and color tests for lonicerin (luteolin-7-rhamnoglucoside from Lonicera) and veronicastroside (luteolin-7-neohesperidoside from Trachelospermum); | disaccharide derivative; glycosyloxyflavone; neohesperidoside; trihydroxyflavone | antibacterial agent; metabolite |
| 4-hydroxychalcone | 4-hydroxychalcone : A member of the class of chalcones that is trans-chalcone substituted by a hydroxy group at position 4. 4-hydroxychalcone: structure in first source | chalcones; phenols | antihypertensive agent; plant metabolite |
| 3',4',7-trihydroxyisoflavone | 3',4',7-trihydroxyisoflavone : A 7-hydroxyisoflavone that is daidzein substituted by a hydroxy group at position 3'. 3',4',7-trihydroxyisoflavone: from Streptomyces sp OH-1049; structure given in first source | 7-hydroxyisoflavones | antineoplastic agent; EC 1.3.1.22 [3-oxo-5alpha-steroid 4-dehydrogenase (NADP(+))] inhibitor; metabolite |
| 6,7,4'-trihydroxyisoflavone | 4',6,7-trihydroxyisoflavone : A hydroxyisoflavone that is daidzein bearing an additional hydroxy substituent at position 6. 6,7,4'-trihydroxyisoflavone: structure in first source | 7-hydroxyisoflavones | anti-inflammatory agent; antimutagen; EC 1.14.18.1 (tyrosinase) inhibitor; metabolite; PPARalpha agonist; PPARgamma agonist |
| topiroxostat | FYX-051: xanthine oxidoreductase inhibitor | ||
| cycloolivil | cycloolivil: a free radical scavenger with platelet aggregation inhibitory activity; isolated from the olive tree | lignan | |
| glycitein | glycitein : A methoxyisoflavone that is isoflavone substituted by a methoxy group at position 6 and hydroxy groups at positions 7 and 4'. It has been isolated from the mycelia of the fungus Cordyceps sinensis. | 7-hydroxyisoflavone; methoxyisoflavone | fungal metabolite; phytoestrogen; plant metabolite |
| hypolaetin-8-glucoside | hypolaetin-8-glucoside: isolated from Sideritis mugronensis; structure given in first source | ||
| kaempferol-3-o-rutinoside | kaempferol-3-O-rutinoside: isolated from the methanolic extract of the whole plants of Diodia teres through repeated silica gel and Sephadex LH-20 column chromatography; structure in first source kaempferol-3-rutinoside : A kaempferol O-glucoside that is kaempferol attached to a rutinosyl [6-deoxy-alpha-L-mannosyl-(1->6)-beta-D-glucosyl] residue at position 3 via a glycosidic linkage. It has been isolated from the leaves of Solanum campaniforme. | disaccharide derivative; kaempferol O-glucoside; rutinoside; trihydroxyflavone | metabolite; plant metabolite; radical scavenger |
| 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 |
| ombuine | ombuin : A dimethoxyflavone that is quercetin in which the hydroxy groups at positions 7 and 4' are replaced by methoxy groups. Isolated from Cyperus teneriffae, it exhibits anti-inflammatory activity. ombuine: from rhizome of Alpinia tonkinensis | dimethoxyflavone; flavonols; trihydroxyflavone | anti-inflammatory agent; plant metabolite |
| tiliroside | tiliroside: isolated from seeds of Eremocarpus setigerus | cinnamate ester; glycosyloxyflavone; monosaccharide derivative; trihydroxyflavone | plant metabolite |
| 4',5,7-trihydroxy-3,6-dimethoxyflavone | viscosine: a GABA-A receptor agonist with anxiolytic and anticonvulsant activities; isolated from Dodonaea viscosa; structure in first source | ||
| 2-amino-6-chloropurine | 6-chloroguanine : An organochlorine compound that is 7H-purin-2-amine substituted by a chloro group at position 6. 6-chloroguanine: an antimalarial that inhibits hypoxanthine-guanine-xanthine phosphoribosyltransferase; structure in first source | 2-aminopurines; organochlorine compound | |
| 2',4'-dihydroxychalcone | 2',4'-dihydroxychalcone: RN given refers to (E)-isomer; RN for cpd without isomeric designation not available 6/89; structure given in first source | ||
| 4',7,8-trihydroxyisoflavone | 4',7,8-trihydroxyisoflavone: from Streptomyces sp OH-1049; structure given in first source | isoflavones | |
| 4,4'-dihydroxychalcone | 4,4'-dihydroxychalcone: structure | ||
| 2,4,2'-trihydroxychalcone | 2,4,2'-trihydroxychalcone: structure in first source | ||
| broussochalcone a | broussochalcone A: RN given for (E)-isomer; inhibits neutrophil respiratory burst; structure in first source | ||
| 3-nitrobenzaldehyde isonicotinoylhydrazone | 3-nitrobenzaldehyde isonicotinoylhydrazone: structure in first source | ||
| ic 87114 | IC 87114: structure in first source | 6-aminopurines; biaryl; quinazolines | EC 2.7.1.137 (phosphatidylinositol 3-kinase) inhibitor |
| fonsecinone a | fonsecinone A : A dimeric naphthopyran with formula C32H26O10, originally isolated from Aspergillus niger. fonsecinone A: isolated from Aspergillus aculeatus; structure in first source | aromatic ether; aromatic ketone; biaryl; cyclic ketone; naphtho-gamma-pyrone; polyphenol | antibacterial agent; Aspergillus metabolite |
| sesone | 7-deazaxanthine: structure in first source | ||
| salvianolic acid c | salvianolic acid C: mTOR inhibitor from Salvia miltiorrhiza | benzofurans | |
| 4-hydroxycoumarin | 2-hydroxychromone: structure | hydroxycoumarin | |
| oxypurinol | alloxanthine : A pyrazolopyrimidine that is 4,5,6,7-tetrahydro-H-pyrazolo[3,4-d]pyrimidine substituted by oxo groups at positions 4 and 6. Oxypurinol: A xanthine oxidase inhibitor. | pyrazolopyrimidine | drug metabolite; EC 1.17.3.2 (xanthine oxidase) inhibitor |
| allopurinol | allopurinol : A bicyclic structure comprising a pyrazole ring fused to a hydroxy-substituted pyrimidine ring. Allopurinol: A XANTHINE OXIDASE inhibitor that decreases URIC ACID production. It also acts as an antimetabolite on some simpler organisms. | nucleobase analogue; organic heterobicyclic compound | antimetabolite; EC 1.17.3.2 (xanthine oxidase) inhibitor; gout suppressant; radical scavenger |
| 2-amino-4-hydroxy-6-formylpteridine | 2-amino-4-hydroxy-6-formylpteridine: pteridine precursor in biosynthesis of dihydropteroate; structure 6-formylpterin : Pterin carrying a formyl group at position 6. | aldehyde; pterins | EC 1.17.3.2 (xanthine oxidase) inhibitor; reactive oxygen species generator |
| bropirimine | pyrimidines | ||
| 9-phenylguanine |