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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad1eyqa_ Alpha and beta proteins (a+b) Chalcone isomerase Chalcone isomerase Chalcone isomerase Chalcone isomerase (Medicago sativa ) [TaxId: 3879 ], SCOPe (2.08)
Bd1eyqb_ Alpha and beta proteins (a+b) Chalcone isomerase Chalcone isomerase Chalcone isomerase Chalcone isomerase (Medicago sativa ) [TaxId: 3879 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2 FamilyChalcone isomerase-like 8022578 4001110 SCOP2 (2022-06-29)
ASCOP2 SuperfamilyCytochrome P460/chalcone isomerase-like 8034958 3000788 SCOP2 (2022-06-29)
BSCOP2B SuperfamilyCytochrome P460/chalcone isomerase-like 8034958 3000788 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AChalconee1eyqA1 A: a+b two layersX: Chalcone isomerase (From Topology)H: Chalcone isomerase (From Topology)T: Chalcone isomeraseF: ChalconeECOD (1.6)
BChalconee1eyqB1 A: a+b two layersX: Chalcone isomerase (From Topology)H: Chalcone isomerase (From Topology)T: Chalcone isomeraseF: ChalconeECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A1.10.890.20 Mainly Alpha Orthogonal Bundle 10k-s Protein, Hypothetical Protein A Chain ACATH (4.3.0)
A3.50.70.10 Alpha Beta 3-Layer(bba) Sandwich Chalcone isomerase CATH (4.3.0)
B1.10.890.20 Mainly Alpha Orthogonal Bundle 10k-s Protein, Hypothetical Protein A Chain ACATH (4.3.0)
B3.50.70.10 Alpha Beta 3-Layer(bba) Sandwich Chalcone isomerase CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A, B
PF02431Chalcone-flavanone isomerase (Chalcone)Chalcone-flavanone isomeraseChalcone-flavanone isomerase is a plant enzyme responsible for the isomerisation of chalcone to naringenin, 4',5,7-trihydroxyflavanone, a key step in the biosynthesis of flavonoids.Domain

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

ChainsEnzyme NameDescriptionCatalytic Residues
chalcone isomerase  M-CSA #196

Chalcone isomerase is required in plant flavonoid biosynthesis, catalysing the cyclisation of chalcone with a 1:100,000 preference for the S-isomer over the R- isomer. This pathway is well characterised, and so the flavonoid biosynthetic enzymes are attractive targets for metabolic engineering.

Defined by 4 residues: ARG:A-36THR:A-48LYS:A-97TYR:A-106
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