|Superclasses:||Reactions Classified By Conversion Type → Simple Reactions → Chemical Reactions|
|Reactions Classified By Substrate → Small-Molecule Reactions|
EC Number: 18.104.22.1688
Enzymes and Genes:
NADPH:3α-hydroxysteroid 5α-oxidoreductase ( Digitalis lanata )
Aldo-keto reductase family 1 member C4 : AKR1C4 ( Homo sapiens )
Aldo-keto reductase family 1 member C3 : AKR1C3 ( Homo sapiens )
Aldo-keto reductase family 1 member C1 : AKR1C1 ( Homo sapiens )
3α hydroxysteroid dehydrogenase III : AKR1C2 ( Homo sapiens )
In Pathway: cardenolide biosynthesis
The reaction direction shown, that is, A + B ↔ C + D versus C + D ↔ A + B, is in accordance with the Enzyme Commission system.
Most BioCyc compounds have been protonated to a reference pH value of 7.3, and some reactions have been computationally balanced for hydrogen by adding free protons. Please see the PGDB Concepts Guide for more information.
Mass balance status: Balanced.
Direct generic reaction:
allopregnanolone + NAD(P)+ ↔ 5-α-pregnane-3,20-dione + NAD(P)H + H+ (22.214.171.124)
Enzyme Commission Primary Name: 3β-hydroxy-5α-steroid dehydrogenase
Standard Gibbs Free Energy (ΔrG'° in kcal/mol): -1.6264954 [Latendresse13]
Instance reactions of [testosterone + NAD(P)+ → androst-4-ene-3,17-dione + NAD(P)H + H+] (126.96.36.199):
i3: testosterone + NAD+ = androst-4-ene-3,17-dione + NADH + H+ (188.8.131.52)
i4: testosterone + NADP+ ← androst-4-ene-3,17-dione + NADPH + H+ (184.108.40.206)
Instance reactions of [allopregnanolone + NAD(P)+ ↔ 5-α-pregnane-3,20-dione + NAD(P)H + H+] (220.127.116.11):
i1: allopregnanolone + NAD+ → 5-α-pregnane-3,20-dione + NADH + H+ (1.1.-.-)
i2: allopregnanolone + NADP+ ← 5-α-pregnane-3,20-dione + NADPH + H+ (18.104.22.1688)
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