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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad1snza1 All beta proteins Supersandwich Galactose mutarotase-like Aldose 1-epimerase (mutarotase) Galactose mutarotase human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Ad1snza2 Artifacts Tags Tags Tags N-terminal Tags human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Bd1snzb_ All beta proteins Supersandwich Galactose mutarotase-like Aldose 1-epimerase (mutarotase) Galactose mutarotase human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyGalactose mutarotase-like 8057800 3000035 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyGalactose mutarotase-like 8057800 3000035 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AAldose_epime1snzA1 A: beta sandwichesX: Glycosyl hydrolase domain-likeH: supersandwich (From Topology)T: supersandwichF: Aldose_epimECOD (1.6)
BAldose_epime1snzB1 A: beta sandwichesX: Glycosyl hydrolase domain-likeH: supersandwich (From Topology)T: supersandwichF: Aldose_epimECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A2.70.98.10 Mainly Beta Distorted Sandwich Beta-galactosidase Chain A, domain 5CATH (4.3.0)
B2.70.98.10 Mainly Beta Distorted Sandwich Beta-galactosidase Chain A, domain 5CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A, B
PF01263Aldose 1-epimerase (Aldose_epim)Aldose 1-epimerase- Family

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

ChainsEnzyme NameDescriptionCatalytic Residues
aldose 1-epimerase  M-CSA #351

Aldose 1-epimerase, also known as galactose mutarotase, catalyses the interconversion of beta-D-galactose and alpha-D-galactose, as well as other sugars such as glucose. It is required for normal galactose metabolism, and catalyses the first step of the Leloir pathway. The net result of the pathway is the conversion of beta-D-galactose into alpha-D-glucose-1-phosphate. The enzyme shows an approximately four-fold preference for galactose over gulcose.

Mutations of enzymes involved in this pathway are often associated with galactosemia. This hereditary disease presents early onset of cataracts, typically within the first two years of life and in severe cases it can result in liver, kidney and brain damage.

Defined by 3 residues: HIS:A-109 [auth A-107]HIS:A-178 [auth A-176]GLU:A-309 [auth A-307]
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