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17-beta-hydroxysteroid dehydrogenase (NADP+) activity
Definition
Target type: molecularfunction
Catalysis of the reaction: a 17-beta-hydroxysteroid + NADP+ = a 17-oxosteroid + NADPH + H+. [GOC:kad, PMID:17074428]
17-beta-hydroxysteroid dehydrogenase (NADP+) activity is a crucial enzyme involved in the metabolism of steroid hormones. It catalyzes the reversible oxidation-reduction reaction of the 17-beta-hydroxy group of steroid substrates, specifically using NADP+ as a cofactor. This enzymatic activity plays a significant role in the biosynthesis and inactivation of various steroid hormones, including androgens, estrogens, and glucocorticoids. The enzyme's function is essential for regulating the levels of these hormones in the body, which in turn influences a wide range of physiological processes. The reaction proceeds via the transfer of a hydride ion from the 17-beta-hydroxyl group of the substrate to the NADP+ molecule. The NADP+ is reduced to NADPH, while the steroid substrate is oxidized. The reverse reaction, where NADPH is oxidized to NADP+ and the steroid substrate is reduced, is also catalyzed by 17-beta-hydroxysteroid dehydrogenase (NADP+). The direction of the reaction depends on the relative concentrations of the substrates and products, as well as the cellular conditions. This dynamic equilibrium ensures that the appropriate levels of active steroid hormones are maintained in the body. In summary, 17-beta-hydroxysteroid dehydrogenase (NADP+) activity is a critical enzyme in steroid hormone metabolism, responsible for the conversion of inactive precursors to active hormones and vice versa. Its function is essential for maintaining hormonal balance and regulating physiological processes throughout the body.'
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Proteins (2)
| Protein | Definition | Taxonomy |
|---|---|---|
| Testosterone 17-beta-dehydrogenase 3 | A 17-beta-hydroxysteroid dehydrogenase type 3 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P37058] | Homo sapiens (human) |
| 17-beta-hydroxysteroid dehydrogenase type 1 | A 17-beta-hydroxysteroid dehydrogenase type 1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P14061] | Homo sapiens (human) |
Compounds (34)
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| bicalutamide | bicalutamide : A racemate comprising of equal amounts of (R)-bicalutamide and (S)-bicalutamide. It is an oral non-steroidal antiandrogen used in the treatment of prostate cancer and hirsutism. bicalutamide: approved for treatment of advanced prostate cancer N-[4-cyano-3-(trifluoromethyl)phenyl]-3-[(4-fluorophenyl)sulfonyl]-2-hydroxy-2-methylpropanamide : A member of the class of (trifluoromethyl)benzenes that is 4-amino-2-(trifluoromethyl)benzonitrile in which one of the amino hydrogens is substituted by a 3-[(4-fluorophenyl)sulfonyl]-2-hydroxy-2-methylpropanoyl group. | (trifluoromethyl)benzenes; monocarboxylic acid amide; monofluorobenzenes; nitrile; sulfone; tertiary alcohol | |
| endosulfan | endosulfan : A cyclic sulfite ester that is 1,5,5a,6,9,9a-hexahydro-6,9-methano-2,4,3-benzodioxathiepine 3-oxide substituted by chloro groups at positions 6, 7, 8, 9, 10 and 10. Endosulfan: A polychlorinated compound used for controlling a variety of insects. It is practically water-insoluble, but readily adheres to clay particles and persists in soil and water for several years. Its mode of action involves repetitive nerve-discharges positively correlated to increase in temperature. This compound is extremely toxic to most fish. (From Comp Biochem Physiol (C) 1993 Jul;105(3):347-61) | cyclic sulfite ester; cyclodiene organochlorine insecticide | acaricide; agrochemical; GABA-gated chloride channel antagonist; persistent organic pollutant |
| masoprocol | nordihydroguaretic acid: antioxidant compound found in the creosote bush (Larrea tridentata) | catechols; lignan; tetrol | antioxidant; ferroptosis inhibitor; geroprotector; plant metabolite |
| estrone | Hydroxyestrones: Estrone derivatives substituted with one or more hydroxyl groups in any position. They are important metabolites of estrone and other estrogens. | 17-oxo steroid; 3-hydroxy steroid; phenolic steroid; phenols | antineoplastic agent; bone density conservation agent; estrogen; human metabolite; mouse metabolite |
| etiocholanolone | 3alpha-hydroxy-5beta-androstan-17-one : An androstanoid that is 5beta-androstane substituted by an alpha-hydroxy group at position 3 and an oxo group at position 17. It is a metabolite of testosterone in mammals. Etiocholanolone: The 5-beta-reduced isomer of ANDROSTERONE. Etiocholanolone is a major metabolite of TESTOSTERONE and ANDROSTENEDIONE in many mammalian species including humans. It is excreted in the URINE. | 17-oxo steroid; 3alpha-hydroxy steroid; androstanoid | human metabolite; mouse metabolite |
| androstenedione | androst-4-ene-3,17-dione : A 3-oxo Delta(4)-steroid that is androst-4-ene substituted by oxo groups at positions 3 and 17. It is a steroid hormone synthesized in the adrenal glands and gonads. Androstenedione: A delta-4 C19 steroid that is produced not only in the TESTIS, but also in the OVARY and the ADRENAL CORTEX. Depending on the tissue type, androstenedione can serve as a precursor to TESTOSTERONE as well as ESTRONE and ESTRADIOL. | 17-oxo steroid; 3-oxo-Delta(4) steroid; androstanoid | androgen; Daphnia magna metabolite; human metabolite; mouse metabolite |
| 4-hydroxypropiophenone | acetophenones | ||
| 4-hydroxyacetophenone | 4-hydroxyacetophenone: promotes secretion of bile & bile salts, which promotes griseofulvin absorption in the duodenum 4'-hydroxyacetophenone : A monohydroxyacetophenone carrying a hydroxy substituent at position 4'. | monohydroxyacetophenone | fungal metabolite; mouse metabolite; plant metabolite |
| phenylbenzoquinone | phenylbenzoquinone: RN given refers to parent cpd | ||
| dihydrotestosterone | 17beta-hydroxy-5alpha-androstan-3-one : A 17beta-hydroxy steroid that is testosterone in which the 4,5 double bond has been reduced to a single bond with alpha-configuration at position 5. 17beta-hydroxyandrostan-3-one : A 17beta-hydroxy steroid that is testosterone in which the 4-5 double bond has been reduced to a single bond with unspecified configuration at position 5. Dihydrotestosterone: A potent androgenic metabolite of TESTOSTERONE. It is produced by the action of the enzyme 3-OXO-5-ALPHA-STEROID 4-DEHYDROGENASE. | 17beta-hydroxy steroid; 17beta-hydroxyandrostan-3-one; 3-oxo-5alpha-steroid | androgen; Daphnia magna metabolite; human metabolite; mouse metabolite |
| phenylhydroquinone | phenylhydroquinone: major metabolite of o-phenylphenol; cleaves DNA; structure given in first source | ||
| 6-hydroxyflavone | 6-hydroxyflavone: antioxidant; structure in first source | hydroxyflavonoid | |
| estrone 3-methyl ether | estrone 3-methyl ether: RN given refers to cpd with unspecified isomeric designation; structure | ||
| acetylglycyrrhetinic acid | acetylglycyrrhetinic acid: RN given refers to (3beta,20beta)-isomer | triterpenoid | |
| naringenin | (S)-naringenin : The (S)-enantiomer of naringenin. | (2S)-flavan-4-one; naringenin | expectorant; plant metabolite |
| 2-methoxyestrone | 2-methoxyestrone : A 17-oxo steroid that is estrone in which the hydrogen at position 2 has been replaced by a methoxy group. | 17-oxo steroid; 3-hydroxy steroid; alicyclic ketone; aromatic ether; phenolic steroid; phenols | human metabolite; mouse metabolite |
| isoliquiritigenin | chalcones | antineoplastic agent; biological pigment; EC 1.14.18.1 (tyrosinase) inhibitor; GABA modulator; geroprotector; metabolite; NMDA receptor antagonist | |
| zuclomiphene | Zuclomiphene: The cis or (Z)-isomer of clomiphene. | stilbenoid | |
| 3-(1-adamantyl)-6,7,8,9-tetrahydro-5h-(1,2,4)triazolo(4,3-a)azepine | |||
| biochanin a | 4'-methoxyisoflavones; 7-hydroxyisoflavones | antineoplastic agent; EC 3.5.1.99 (fatty acid amide hydrolase) inhibitor; phytoestrogen; plant metabolite; tyrosine kinase inhibitor | |
| 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 |
| 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 |
| kaempferol | 7-hydroxyflavonol; flavonols; tetrahydroxyflavone | antibacterial agent; geroprotector; human blood serum metabolite; human urinary metabolite; human xenobiotic metabolite; plant 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 | |
| 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 | |
| fisetin | 3'-hydroxyflavonoid; 7-hydroxyflavonol; tetrahydroxyflavone | anti-inflammatory agent; antioxidant; EC 5.99.1.3 [DNA topoisomerase (ATP-hydrolysing)] inhibitor; geroprotector; metabolite; plant metabolite | |
| myricetin | 7-hydroxyflavonol; hexahydroxyflavone | antineoplastic agent; antioxidant; cyclooxygenase 1 inhibitor; food component; geroprotector; hypoglycemic agent; plant metabolite | |
| 7-hydroxyflavone | 7-hydroxyflavone : A hydroxyflavonoid in which the flavone nucleus is substituted at position 7 by a hydroxy group. | hydroxyflavonoid | |
| 2'-hydroxygenistein | 2'-hydroxygenistein : A hydroxyisoflavone that is genistein substituted by an additional hydroxy group at position 2'. It has been isolated from Crotalaria lachnophora. | hydroxyisoflavone | plant metabolite |
| chlorferron | chlorferron: metabolite of coumaphos | organochlorine compound | |
| 7-hydroxy-4-trifluoromethylcoumarin | 7-hydroxy-4-trifluoromethylcoumarin: structure given in first source | ||
| bvt2733 | |||
| 6-(3-hydroxyphenyl)-2-naphthol | 6-(3-hydroxyphenyl)-2-naphthol: has inhibitory effects on tyrosinase activity and melanin synthesis; structure in first source | ||
| d-homoestrone | D-homoestrone: structure |