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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad2hi7a1 Alpha and beta proteins (a/b) Thioredoxin fold Thioredoxin-like DsbA-like Disulfide-bond formation facilitator (DsbA) (Escherichia coli ) [TaxId: 562 ], SCOPe (2.08)
Bd2hi7b1 All alpha proteins Bromodomain-like DsbB-like DsbB-like Disulfide bond formation protein DsbB (Escherichia coli ) [TaxId: 562 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyThioredoxin-like 8035549 3000031 SCOP2B (2022-06-29)
BSCOP2 FamilyDsbB-like 8020671 4001329 SCOP2 (2022-06-29)
BSCOP2 SuperfamilyDsbB-like 8033051 3001302 SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
ADsbA_DsbAe2hi7A2 A: alpha arraysX: Insertion subdomain in DsbA-likeH: Insertion subdomain in DsbA-like (From Topology)T: Insertion subdomain in DsbA-likeF: DsbA_DsbAECOD (1.6)
AThioredoxin_1e2hi7A3 A: a+b three layersX: Thioredoxin-likeH: Thioredoxin-like (From Topology)T: Thioredoxin-likeF: Thioredoxin_1ECOD (1.6)
BDsbBe2hi7B1 A: alpha bundlesX: Bromodomain-likeH: DsbB-like (From Topology)T: DsbB-likeF: DsbBECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.40.30.10 Alpha Beta 3-Layer(aba) Sandwich Glutaredoxin GlutaredoxinCATH (4.3.0)
B1.20.1550.10 Mainly Alpha Up-down Bundle Bromodomain-like DsbB-likeCATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF01323DSBA-like thioredoxin domain (DSBA)DSBA-like thioredoxin domainThis family contains a diverse set of proteins with a thioredoxin-like structure Pfam:PF00085. This family also includes 2-hydroxychromene-2-carboxylate (HCCA) isomerase enzymes catalyse one step in prokaryotic polyaromatic hydrocarbon (PAH) cataboli ...This family contains a diverse set of proteins with a thioredoxin-like structure Pfam:PF00085. This family also includes 2-hydroxychromene-2-carboxylate (HCCA) isomerase enzymes catalyse one step in prokaryotic polyaromatic hydrocarbon (PAH) catabolic pathways [2,3,4]. This family also contains members with functions other than HCCA isomerisation, such as Kappa family GSTs (e.g. Swiss:P24473), whose similarity to HCCA isomerases was not previously recognised. The sequence Swiss:O07298 has been annotated as a dioxygenase but is almost certainly an HCCA isomerase enzyme. Similarly, the sequence Swiss:Q9ZI67 has been annotated as a dehydrogenase, but is most probably also an HCCA isomerase enzyme. In addition, the Rhizobium leguminosarum Swiss:Q52782 protein has been annotated as a putative glycerol-3-phosphate transfer protein, but is also most likely to be an HCCA isomerase enzyme (see [5]).
Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
Thiol:disulfide interchange protein dsbA
Disulfide bond formation protein B

Membrane Protein Annotation: OPM OPM Database Homepage

ChainsExternal LinkTypeClassSuperfamilyFamily
A, B
OPMDisulfide bond oxidoreductase-B (DsbB)

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

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

ChainsEnzyme NameDescriptionCatalytic Residues
protein disulfide oxidoreductase  M-CSA #734

DsbB isolated from Escherichia coli is able to create disulfide bonds de novo. It forms a complex with DsbA and overall there is a net formation of a disulfide bridge in DsbA and a quinone cofactor is reduced in DsbB. The quinone can either be ubiquinone (under aerobic conditions) or menaquinone (under anaerobic conditions). DsbA is a periplasmic dithiol oxidase and it is the primary disulfide bond donor in the periplasm. The disulfide bond to be produced in DsbA is between Cys30 and Cys33. Two disulfide bonds exist in DsbB in the resting state, Cys41-Cys44 and Cys104-Cys130; they are involved in the catalytic pathway.

Defined by 5 residues: CYS:B-41CYS:B-44ARG:B-48CYS:B-104SER:B-130
Some residues are not modelled and lack atomic coordinates. Visualization is not available.
Some residues are not modelled and lack atomic coordinates. Structure Motif searching is not available.
EC: 1.8.5 (PDB Primary Data)