Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyRmlC-like cupins 8042344 3001825 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyRmlC-like cupins 8042344 3001825 SCOP2B (2022-06-29)
CSCOP2B SuperfamilyRmlC-like cupins 8042344 3001825 SCOP2B (2022-06-29)
DSCOP2B SuperfamilyRmlC-like cupins 8042344 3001825 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AEutQ_1e1gqgA3 A: beta sandwichesX: jelly-rollH: Double-stranded beta-helix (From Topology)T: Double-stranded beta-helixF: EutQ_1ECOD (1.6)
ACupin_2e1gqgA2 A: beta sandwichesX: jelly-rollH: Double-stranded beta-helix (From Topology)T: Double-stranded beta-helixF: Cupin_2ECOD (1.6)
BEutQ_1e1gqgB3 A: beta sandwichesX: jelly-rollH: Double-stranded beta-helix (From Topology)T: Double-stranded beta-helixF: EutQ_1ECOD (1.6)
BCupin_2e1gqgB2 A: beta sandwichesX: jelly-rollH: Double-stranded beta-helix (From Topology)T: Double-stranded beta-helixF: Cupin_2ECOD (1.6)
CEutQ_1e1gqgC3 A: beta sandwichesX: jelly-rollH: Double-stranded beta-helix (From Topology)T: Double-stranded beta-helixF: EutQ_1ECOD (1.6)
CCupin_2e1gqgC2 A: beta sandwichesX: jelly-rollH: Double-stranded beta-helix (From Topology)T: Double-stranded beta-helixF: Cupin_2ECOD (1.6)
DEutQ_1e1gqgD3 A: beta sandwichesX: jelly-rollH: Double-stranded beta-helix (From Topology)T: Double-stranded beta-helixF: EutQ_1ECOD (1.6)
DCupin_2e1gqgD2 A: beta sandwichesX: jelly-rollH: Double-stranded beta-helix (From Topology)T: Double-stranded beta-helixF: Cupin_2ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A2.60.120.10 Mainly Beta Sandwich Jelly Rolls Jelly RollsCATH (4.3.0)
B2.60.120.10 Mainly Beta Sandwich Jelly Rolls Jelly RollsCATH (4.3.0)
C2.60.120.10 Mainly Beta Sandwich Jelly Rolls Jelly RollsCATH (4.3.0)
D2.60.120.10 Mainly Beta Sandwich Jelly Rolls Jelly RollsCATH (4.3.0)

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
A, B, C, D
IPR011051RmlC-like cupin domain superfamilyHomologous Superfamily
A, B, C, D
IPR052538Flavonoid dioxygenase-likeFamily
A, B, C, D
IPR014710RmlC-like jelly roll foldHomologous Superfamily

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

ChainsEnzyme NameDescriptionCatalytic Residues
quercetin 2,3-dioxygenase  M-CSA #743

Quercetin 2,3-dioxygenase is a copper-dependent enzyme that catalyses the reaction of dioxygen with quercin (3,5,7,3',4'-pentahydroxy flavone). Dioxygenases are enzymes that catalyses the incorporation of both atoms of molecular oxygen into organic substrates, most notably during the degradation of aromatic compounds. They typically use a metal ion to circumvent the spin barrier that prevents the direct reaction of the triplet ground state of dioxygen with singlet-state organic compounds. In most of the well-studied dioxygenases, the metal used is iron; quercetin 2,3-dioxygenase is the only known member of this family to use copper.

Defined by 4 residues: HIS:A-66HIS:A-68GLU:A-73HIS:A-112
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