Prostaglandin-E2 9-reductase

In enzymology, a prostaglandin-E₂ 9-reductase (EC 1.1.1.189) is an enzyme that catalyzes the chemical reaction

prostaglandin E2

+ NADP⁺

 

 

 

H⁺

 

H⁺

 

prostaglandin F2α

+ NADPH

 

prostaglandin-E2 9-reductase
Identifiers
EC no.	1.1.1.189
CAS no.	42613-35-4
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
Gene Ontology	AmiGO / QuickGO
Search PMC articles PubMed articles NCBI proteins

Thus, the two substrates of this enzyme are prostaglandin E₂ and oxidised nicotinamide adenine dinucleotide phosphate (NADP⁺). Its products are prostaglandin F_2α, reduced NADPH, and a proton.^[1]

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 (5Z,13E)-(15S)-9alpha,11alpha,15-trihydroxyprosta-5,13-dienoate:NADP⁺ 9-oxidoreductase. Other names in common use include PGE₂-9-OR, reductase, 15-hydroxy-9-oxoprostaglandin, 9-keto-prostaglandin E₂ reductase, 9-ketoprostaglandin reductase, PGE-9-ketoreductase, PGE₂ 9-oxoreductase, PGE₂ reductase-9-ketoreductase, prostaglandin 9-ketoreductase, prostaglandin E 9-ketoreductase, and prostaglandin E₂ reductase-9-oxoreductase. This enzyme participates in arachidonic acid metabolism.

Structural studies

As of late 2007, 3 structures have been solved for this class of enzymes, with PDB accession codes 1Q13, 1Q5M, and 2PFG.