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

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2 FamilyRibose/Galactose isomerase RpiB/AlsB 8021080 4000476 SCOP2 (2022-06-29)
ASCOP2 SuperfamilyRibose/Galactose isomerase RpiB/AlsB 8033460 3000383 SCOP2 (2022-06-29)
BSCOP2B SuperfamilyRibose/Galactose isomerase RpiB/AlsB 8033460 3000383 SCOP2B (2022-06-29)
CSCOP2B SuperfamilyRibose/Galactose isomerase RpiB/AlsB 8033460 3000383 SCOP2B (2022-06-29)
DSCOP2B SuperfamilyRibose/Galactose isomerase RpiB/AlsB 8033460 3000383 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
ALacAB_rpiB,RNAse_Pc_likee1nn4A1 A: a/b three-layered sandwichesX: Ribose/Galactose isomerase RpiB/AlsB (From Topology)H: Ribose/Galactose isomerase RpiB/AlsB (From Topology)T: Ribose/Galactose isomerase RpiB/AlsBF: LacAB_rpiB,RNAse_Pc_likeECOD (1.6)
BLacAB_rpiB,RNAse_Pc_likee1nn4B1 A: a/b three-layered sandwichesX: Ribose/Galactose isomerase RpiB/AlsB (From Topology)H: Ribose/Galactose isomerase RpiB/AlsB (From Topology)T: Ribose/Galactose isomerase RpiB/AlsBF: LacAB_rpiB,RNAse_Pc_likeECOD (1.6)
CLacAB_rpiB,RNAse_Pc_likee1nn4C1 A: a/b three-layered sandwichesX: Ribose/Galactose isomerase RpiB/AlsB (From Topology)H: Ribose/Galactose isomerase RpiB/AlsB (From Topology)T: Ribose/Galactose isomerase RpiB/AlsBF: LacAB_rpiB,RNAse_Pc_likeECOD (1.6)
DLacAB_rpiB,RNAse_Pc_likee1nn4D1 A: a/b three-layered sandwichesX: Ribose/Galactose isomerase RpiB/AlsB (From Topology)H: Ribose/Galactose isomerase RpiB/AlsB (From Topology)T: Ribose/Galactose isomerase RpiB/AlsBF: LacAB_rpiB,RNAse_Pc_likeECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A, B, C, D
PF02502Ribose/Galactose Isomerase (LacAB_rpiB)Ribose/Galactose Isomerase- Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A, B, C, D
Ribose 5-phosphate isomerase B -

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

ChainsEnzyme NameDescriptionCatalytic Residues
A, D
ribose-5-phosphate isomerase  M-CSA #680

Ribose-5-phosphate isomerase is able to catalyse the interconversion of Ribose-5-phosphate and Ribulose-5-phosphate, an isomerisation reaction involving the open chain forms of the two sugars, important in the pentose phosphate pathway. In Escherichia coli there are two forms of the enzyme, which although they catalyse the same reaction, have entirely different mechanisms and catalytic residues. The less common Escherichia coli RpiB is described here.

Defined by 5 residues: ASP:A-22 [auth A-9]CYS:A-79 [auth A-66]THR:A-81 [auth A-68]HIS:D-112 [auth D-99]HIS:D-147 [auth D-134]
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