3(or 17)a-hydroxysteroid dehydrogenase

Class of enzymes

3(or 17)alpha-hydroxysteroid dehydrogenase

Identifiers
EC no.| 1.1.1.209
CAS no.| 83294-77-3
Databases
IntEnz| IntEnz view
BRENDA| BRENDA entry
ExPASy| NiceZyme view
KEGG| KEGG entry
MetaCyc| metabolic pathway
PRIAM| profile
PDB structures| RCSB PDB PDBe PDBsum
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PMC| articles
PubMed| articles
NCBI| proteins

3(or 17)alpha-hydroxysteroid dehydrogenase (EC 1.1.1.209, 3(17)alpha-hydroxysteroid dehydrogenase) is an enzyme with systematic name 3(or 17)alpha-hydroxysteroid:NAD(P)+ oxidoreductase.[1][2] This enzyme catalyses the chemical reaction

androsterone + NAD(P)+  ⇌ {\displaystyle \rightleftharpoons } 5alpha-androstane-3,17-dione + NAD(P)H + H+

This enzyme acts on the 3alpha-hydroxy group of androgens of the 5alpha-androstane series; and also, more slowly, on the 17alpha-hydroxy group of both androgenic and estrogenic substrates (cf. EC 1.1.1.51 3(or 17)beta-hydroxysteroid dehydrogenase).

## References

[edit]

1. ^ Lau PC, Layne DS, Williamson DG (August 1982). "A 3(17) alpha-hydroxysteroid dehydrogenase of female rabbit kidney cytosol. Purification and characterization of multiple forms of the enzyme". The Journal of Biological Chemistry. 257 (16): 9444–9\. doi:10.1016/S0021-9258(18)34090-0. PMID 6955302.
2. ^ Lau PC, Layne DS, Williamson DG (August 1982). "Comparison of the multiple forms of the soluble 3(17) alpha-hydroxysteroid dehydrogenases of female rabbit kidney and liver". The Journal of Biological Chemistry. 257 (16): 9450–6\. doi:10.1016/S0021-9258(18)34091-2. PMID 6955303.

## External links

[edit]

* 3(or+17)alpha-hydroxysteroid+dehydrogenase at the U.S. National Library of Medicine Medical Subject Headings (MeSH)

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Oxidoreductases: alcohol oxidoreductases (EC 1.1)

1.1.1: NAD/NADP acceptor|

* 3-hydroxyacyl-CoA dehydrogenase
* 3-hydroxybutyryl-CoA dehydrogenase
* Alcohol dehydrogenase
* Aldo-keto reductase
* 1A1
* 1B1
* 1B10
* 1C1
* 1C3
* 1C4
* 7A2
* Aldose reductase
* Beta-Ketoacyl ACP reductase
* Carbohydrate dehydrogenases
* Carnitine dehydrogenase
* D-malate dehydrogenase (decarboxylating)
* DXP reductoisomerase
* Glucose-6-phosphate dehydrogenase
* Glycerol-3-phosphate dehydrogenase
* HMG-CoA reductase
* IMP dehydrogenase
* Isocitrate dehydrogenase
* Lactate dehydrogenase
* L-threonine dehydrogenase
* L-xylulose reductase
* Malate dehydrogenase
* Malate dehydrogenase (decarboxylating)
* Malate dehydrogenase (NADP+)
* Malate dehydrogenase (oxaloacetate-decarboxylating)
* Malate dehydrogenase (oxaloacetate-decarboxylating) (NADP+)
* Phosphogluconate dehydrogenase
* Sorbitol dehydrogenase

* Hydroxysteroid dehydrogenase: 3β
* 3β-HSD
* NSDHL
* 11β
* 11β-HSD1
* 11β-HSD2
* 17β

1.1.2: cytochrome acceptor|

* D-lactate dehydrogenase (cytochrome)
* D-lactate dehydrogenase (cytochrome c-553)
* Mannitol dehydrogenase (cytochrome)

1.1.3: oxygen acceptor|

* Glucose oxidase
* L-gulonolactone oxidase
* Xanthine oxidase
* Alcohol oxidase

1.1.4: disulfide as acceptor|

* Vitamin K epoxide reductase
* Vitamin-K-epoxide reductase (warfarin-insensitive)

1.1.5: quinone/similar acceptor|

* Malate dehydrogenase (quinone)
* Quinoprotein glucose dehydrogenase

1.1.99: other acceptors|

* Choline dehydrogenase
* L2HGDH

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Enzymes

Activity|

* Active site
* Binding site
* Catalytic triad
* Oxyanion hole
* Enzyme promiscuity
* Diffusion-limited enzyme
* Cofactor
* Enzyme catalysis

Regulation|

* Allosteric regulation
* Cooperativity
* Enzyme inhibitor
* Enzyme activator

Classification|

* EC number
* Enzyme superfamily
* Enzyme family
* List of enzymes

Kinetics|

* Enzyme kinetics
* Eadie–Hofstee diagram
* Hanes–Woolf plot
* Lineweaver–Burk plot
* Michaelis–Menten kinetics

Types|

* EC1 Oxidoreductases (list)
* EC2 Transferases (list)
* EC3 Hydrolases (list)
* EC4 Lyases (list)
* EC5 Isomerases (list)
* EC6 Ligases (list)
* EC7 Translocases (list)

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