3beta(or 20alpha)-hydroxysteroid dehydrogenase
Encyclopedia
In enzymology, a 3-β-hydroxysteroid dehydrogenase is a putative enzyme
that possesses the combined activities of the 3-β-hydroxysteroid dehydrogenase/Δ-5-4 isomerase
and 20-α-hydroxysteroid dehydrogenase
enzymes.
Enzyme
Enzymes are proteins that catalyze chemical reactions. In enzymatic reactions, the molecules at the beginning of the process, called substrates, are converted into different molecules, called products. Almost all chemical reactions in a biological cell need enzymes in order to occur at rates...
that possesses the combined activities of the 3-β-hydroxysteroid dehydrogenase/Δ-5-4 isomerase
3-beta-HSD
3-β-HSD is an enzyme that catalyses the synthesis of progesterone from pregnenolone, 17-hydroxyprogesterone from 17-hydroxypregnenolone, and androstenedione from dehydroepiandrosterone in the adrenal gland...
and 20-α-hydroxysteroid dehydrogenase
20alpha-hydroxysteroid dehydrogenase
In enzymology, a 20-α-hydroxysteroid dehydrogenase is an enzyme that catalyzes the chemical reactionThe 3 substrates of this enzyme are 17alpha,20alpha-dihydroxypregn-4-en-3-one, NAD+, and NADP+, whereas its 4 products are 17-alpha-hydroxyprogesterone, NADH, NADPH, and H+.This enzyme belongs to...
enzymes.