cytochrome P450 reductase

E850009

Cytochrome P450 reductase is a flavoprotein enzyme that transfers electrons from NADPH to cytochrome P450 enzymes, enabling their role in drug metabolism and biosynthesis of endogenous compounds.

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Statements (49)

Predicate Object
instanceOf NADPH-dependent reductase
flavoprotein enzyme
oxidoreductase
affects bioactivation of prodrugs
clearance of many drugs
formation of reactive drug metabolites
belongsToFamily diflavin reductases NERFINISHED
catalyzesReaction NADPH + H+ + 2 ferricytochrome P450 → NADP+ + 2 ferrocytochrome P450
electronTransferPathway NADPH to FAD to FMN to cytochrome P450 heme iron
enablesProcess biosynthesis of endogenous compounds
drug metabolism
foundIn endoplasmic reticulum membrane
hasAlternativeName CPR NERFINISHED
NADPH–cytochrome P450 oxidoreductase NERFINISHED
P450 oxidoreductase NERFINISHED
hasCofactor FAD
FMN
hasDomain FAD-binding domain
FMN-binding domain
NADPH-binding domain
hasECNumber 1.6.2.4
hasSubcellularLocation microsomes
interactsWith cytochrome b5
microsomal cytochrome P450 enzymes
isConservedIn many invertebrates
vertebrates
isEncodedBy POR gene NERFINISHED
isEssentialFor microsomal P450 catalytic cycle
isImportantIn hepatic drug metabolism
metabolism of environmental chemicals
isMembraneBound true
isRateLimitingFor some cytochrome P450-mediated reactions
isTargetOf pharmacogenetic studies
localization cytosolic side of endoplasmic reticulum
mutationAssociatedWith Antley–Bixler syndrome (POR-related) NERFINISHED
POR deficiency
disorders of steroidogenesis
participatesIn cholesterol metabolism
fatty acid metabolism
steroid biosynthesis
xenobiotic metabolism
presentIn humans
mammals
many eukaryotes
requires NADPH as electron donor
flavin adenine dinucleotide
flavin mononucleotide
transfersElectronsTo cytochrome P450 enzymes
usesCofactor NADPH

Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

CYP3A4 electronDonorProtein cytochrome P450 reductase
CYP2J2 requires cytochrome P450 reductase