In enzymology, a 3beta-hydroxy-5beta-steroid dehydrogenase (EC 1.1.1.277) is an enzyme that catalyzes the chemical reaction
| 3beta-hydroxy-5beta-steroid dehydrogenase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC no. | 1.1.1.277 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| |||||||||
- 3beta-hydroxy-5beta-pregnane-20-one + NADP+ 5beta-pregnan-3,20-dione + NADPH + H+
Thus, the two substrates of this enzyme are 3beta-hydroxy-5beta-pregnane-20-one and NADP+, whereas its 3 products are 5beta-pregnan-3,20-dione, NADPH, and H+.
This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is 3beta-hydroxy-5beta-steroid:NADP+ 3-oxidoreductase. Other names in common use include 3beta-hydroxysteroid 5beta-oxidoreductase, and 3beta-hydroxysteroid 5beta-progesterone oxidoreductase.
References
edit- Stuhlemmer U, Kreis W (1996). "Cardenolide formation and activity of pregnane-modifying enzymes in cell suspension cultures, shoot cultures and leaves of Digitalis lanata". Plant Physiol. Biochem. 34: 85–91.
- Seitz HU, Gaertner DE (1994). "Enzymes in cardenolide-accumulating shoot cultures of Digitalis purpurea". Plant Cell. 38: 337–344. doi:10.1007/bf00033894.
- Lindemann P, Luckner M (1997). "Biosynthesis of pregnane derivatives in somatic embryos of Digitalis lanata". Phytochemistry. 46 (3): 507–513. doi:10.1016/S0031-9422(97)00315-4.
