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 1C9U | pdb_00001c9u

CRYSTAL STRUCTURE OF THE SOLUBLE QUINOPROTEIN GLUCOSE DEHYDROGENASE IN COMPLEX WITH PQQ

External Resource: Annotation


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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Bd1c9ub_ All beta proteins 6-bladed beta-propeller Soluble quinoprotein glucose dehydrogenase Soluble quinoprotein glucose dehydrogenase Soluble quinoprotein glucose dehydrogenase (Acinetobacter calcoaceticus ) [TaxId: 471 ], SCOPe (2.08)
Ad1c9ua_ All beta proteins 6-bladed beta-propeller Soluble quinoprotein glucose dehydrogenase Soluble quinoprotein glucose dehydrogenase Soluble quinoprotein glucose dehydrogenase (Acinetobacter calcoaceticus ) [TaxId: 471 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
BSCOP2B SuperfamilyGSDH-like 8042839 3001635 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyGSDH-like 8042839 3001635 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
BFG-GAP, FG-GAP_3e1c9uB1 A: alpha arraysX: Phage tail fiber protein trimerization domainH: Phage tail fiber protein trimerization domainT: Phage tail fiber protein trimerization domainF: FG-GAP, FG-GAP_3ECOD (v295.2)
AFG-GAP, FG-GAP_3e1c9uA1 A: alpha arraysX: Phage tail fiber protein trimerization domainH: Phage tail fiber protein trimerization domainT: Phage tail fiber protein trimerization domainF: FG-GAP, FG-GAP_3ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
B2.120.10.30 Mainly Beta 6 Propeller Neuraminidase TolB, C-terminal domainCATH (4.3.0)
A2.120.10.30 Mainly Beta 6 Propeller Neuraminidase TolB, C-terminal domainCATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A, B
SOLUBLE QUINOPROTEIN GLUCOSE DEHYDROGENASE - -

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
A, B
IPR011042Six-bladed beta-propeller, TolB-likeHomologous Superfamily
A, B
IPR011041Soluble quinoprotein glucose/sorbosone dehydrogenase, beta-propeller domain superfamilyHomologous Superfamily
A, B
IPR012938Glucose/Sorbosone dehydrogenaseDomain
A, B
IPR019893PQQ-dependent dehydrogenase SndH-likeFamily

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

ChainsEnzyme NameDescriptionCatalytic Residues
quinoprotein glucose dehydrogenase  M-CSA #104

The soluble quinoprotein glucose dehydrogenase (s-GDH, EC 1.1.99.17) from Acinetobacter calcoaceticus is a classical quinoprotein which requires the cofactor pyrroloquinoline quinone (PQQ) to oxidise glucose to gluconolactone with the concomitant reduction of ubiquinone.

The reaction mechanism of PQQ-dependent enzymes has remained controversial due to the absence of comprehensive structural data. Three alternative proposals have been suggested: the addition-elimination reaction in which the glucose becomes covalently attached to the PQQ, the hydride transfer to the C5 of the PQQ, and the hydride transfer to the C4 of the PQQ [PMID:10508152, PMID:12686124].

Defined by 7 residues: HIS:A-144ASP:A-163ARG:A-228ALA:A-269TYR:A-271ASP:A-273GLU:A-309
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Explore in 3D: M-CSA Motif Definition
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EC: 1.1.5.2 (UniProt)