Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyRiboflavin synthase domain-like 8042045 3001812 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyFerredoxin reductase-like, C-terminal NADP-linked domain 8044178 3001461 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AFAD_binding_1_1ste1fnbA1 A: beta barrelsX: cradle loop barrelH: RIFT-relatedT: Alanine racemase-CF: FAD_binding_1_1stECOD (1.6)
ANAD_binding_1e1fnbA2 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

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A2.40.30.10 Mainly Beta Beta Barrel Elongation Factor Tu (Ef-tu) domain 3CATH (4.3.0)
A3.40.50.80 Alpha Beta 3-Layer(aba) Sandwich Rossmann fold Nucleotide-binding domain of ferredoxin-NADP reductase (FNR) moduleCATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF00175Oxidoreductase NAD-binding domain (NAD_binding_1)Oxidoreductase NAD-binding domainXanthine dehydrogenases, that also bind FAD/NAD, have essentially no similarity.Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
FERREDOXIN-NADP+ REDUCTASE

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

ChainsEnzyme NameDescriptionCatalytic Residues
ferredoxin--NADP reductase  M-CSA #506

Ferredoxin reductase (FNR) catalyses the final electron transport step of linear photosynthesis, receiving one electron from two electron carrier ferredoxin proteins and uses these electrons to convert NADP+ into NADPH via hydride transfer from atom N(5) of the FAD cofactor using two molecules of ferredoxin (Fd) as the source of the electrons.

In chloroplasts and cyanobacteria the enzyme acts on plant-type [2Fe-2S] ferredoxins, but in other bacteria it can also reduce bacterial 2[4Fe-4S] ferredoxins and flavodoxin.

FNR is a member of a large family of electron transport proteins containing NAD and FAD binding sites which form an FNR-like module.

Defined by 5 residues: TYR:A-95SER:A-96CYS:A-272GLU:A-312TYR:A-314
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