Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad1amoa1 All beta proteins Reductase/isomerase/elongation factor common domain Riboflavin synthase domain-like NADPH-cytochrome p450 reductase FAD-binding domain-like NADPH-cytochrome p450 reductase Norway rat (Rattus norvegicus ) [TaxId: 10116 ], SCOPe (2.08)
Ad1amoa2 Alpha and beta proteins (a/b) Flavodoxin-like Flavoproteins Cytochrome p450 reductase N-terminal domain-like NADPH-cytochrome p450 reductase, N-terminal domain Norway rat (Rattus norvegicus ) [TaxId: 10116 ], SCOPe (2.08)
Ad1amoa3 Alpha and beta proteins (a/b) Ferredoxin reductase-like, C-terminal NADP-linked domain Ferredoxin reductase-like, C-terminal NADP-linked domain NADPH-cytochrome p450 reductase-like NADPH-cytochrome p450 reductase Norway rat (Rattus norvegicus ) [TaxId: 10116 ], SCOPe (2.08)
Bd1amob1 All beta proteins Reductase/isomerase/elongation factor common domain Riboflavin synthase domain-like NADPH-cytochrome p450 reductase FAD-binding domain-like NADPH-cytochrome p450 reductase Norway rat (Rattus norvegicus ) [TaxId: 10116 ], SCOPe (2.08)
Bd1amob2 Alpha and beta proteins (a/b) Flavodoxin-like Flavoproteins Cytochrome p450 reductase N-terminal domain-like NADPH-cytochrome p450 reductase, N-terminal domain Norway rat (Rattus norvegicus ) [TaxId: 10116 ], SCOPe (2.08)
Bd1amob3 Alpha and beta proteins (a/b) Ferredoxin reductase-like, C-terminal NADP-linked domain Ferredoxin reductase-like, C-terminal NADP-linked domain NADPH-cytochrome p450 reductase-like NADPH-cytochrome p450 reductase Norway rat (Rattus norvegicus ) [TaxId: 10116 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyFlavoproteins 8034257 3001217 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyRiboflavin synthase domain-like 8034256 3001812 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyFerredoxin reductase-like, C-terminal NADP-linked domain 8034259 3001461 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyFlavoproteins 8034257 3001217 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyFerredoxin reductase-like, C-terminal NADP-linked domain 8034259 3001461 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyRiboflavin synthase domain-like 8034256 3001812 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AFAD_binding_1_1ste1amoA5 A: beta barrelsX: cradle loop barrelH: RIFT-relatedT: Alanine racemase-CF: FAD_binding_1_1stECOD (1.6)
AFAD_binding_1_2nde1amoA4 A: alpha bundlesX: NADPH-cytochrome p450 reductase helical insertion domain (From Topology)H: NADPH-cytochrome p450 reductase helical insertion domain (From Topology)T: NADPH-cytochrome p450 reductase helical insertion domainF: FAD_binding_1_2ndECOD (1.6)
AFlavodoxin_1e1amoA2 A: a/b three-layered sandwichesX: Flavodoxin-likeH: Flavoproteins/Phosphotyrosine protein phosphatases-likeT: FlavoproteinsF: Flavodoxin_1ECOD (1.6)
ANAD_binding_1e1amoA3 A: a/b three-layered sandwichesX: Ferredoxin reductase-like, C-terminal NADP-linked domain (From Topology)H: Ferredoxin reductase-like, C-terminal NADP-linked domain (From Topology)T: Ferredoxin reductase-like, C-terminal NADP-linked domainF: NAD_binding_1ECOD (1.6)
BFAD_binding_1_1ste1amoB5 A: beta barrelsX: cradle loop barrelH: RIFT-relatedT: Alanine racemase-CF: FAD_binding_1_1stECOD (1.6)
BFAD_binding_1_2nde1amoB4 A: alpha bundlesX: NADPH-cytochrome p450 reductase helical insertion domain (From Topology)H: NADPH-cytochrome p450 reductase helical insertion domain (From Topology)T: NADPH-cytochrome p450 reductase helical insertion domainF: FAD_binding_1_2ndECOD (1.6)
BFlavodoxin_1e1amoB2 A: a/b three-layered sandwichesX: Flavodoxin-likeH: Flavoproteins/Phosphotyrosine protein phosphatases-likeT: FlavoproteinsF: Flavodoxin_1ECOD (1.6)
BNAD_binding_1e1amoB3 A: a/b three-layered sandwichesX: Ferredoxin reductase-like, C-terminal NADP-linked domain (From Topology)H: Ferredoxin reductase-like, C-terminal NADP-linked domain (From Topology)T: Ferredoxin reductase-like, C-terminal NADP-linked domainF: NAD_binding_1ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A, B
PF00667FAD binding domain (FAD_binding_1)FAD binding domainThis domain is found in sulfite reductase, NADPH cytochrome P450 reductase, Nitric oxide synthase and methionine synthase reductase.Domain
A, B
PF00175Oxidoreductase NAD-binding domain (NAD_binding_1)Oxidoreductase NAD-binding domainXanthine dehydrogenases, that also bind FAD/NAD, have essentially no similarity.Domain
A, B
PF00258Flavodoxin (Flavodoxin_1)Flavodoxin- Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A, B
NADPH-CYTOCHROME P450 REDUCTASE

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

ChainsEnzyme NameDescriptionCatalytic Residues
NADPH-hemoprotein reductase  M-CSA #117

Rat NADPH-cytochrome P450 oxidoreductase (CYPOR) catalyses the transfer of electrons from NADPH to a range of cytochrome P450 proteins. Other electron acceptors include heme oxygenase, cytochrome b5 and fatty-acid elongase. It is a 78kDa protein and is attached to the cytoplasmic side of the endoplasmic reticulum and the outer membrane of the nuclear envelope by a hydrophobic N-terminal membrane anchor.

The FAD and FMN containing domains are linked by a flexible peptide hinge and it is thought that CYPOR evolved after a fusion of genes encoding for a FMN-containing flavodoxin and a FAD- binding ferredoxin-NADP reductase.

Defined by 4 residues: SER:A-394 [auth A-457]CYS:A-567 [auth A-630]ASP:A-612 [auth A-675]TRP:A-614 [auth A-677]
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