1CBG

THE CRYSTAL STRUCTURE OF A CYANOGENIC BETA-GLUCOSIDASE FROM WHITE CLOVER (TRIFOLIUM REPENS L.), A FAMILY 1 GLYCOSYL-HYDROLASE

External Resource: Annotation


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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad1cbga_ Alpha and beta proteins (a/b) TIM beta/alpha-barrel (Trans)glycosidases Family 1 of glycosyl hydrolase Plant beta-glucosidase (myrosinase) (Trifolium repens ) [TaxId: 3899 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2 FamilyFamily 1 of glycosyl hydrolase 8031037 4003184 SCOP2 (2022-06-29)
ASCOP2 Superfamily(Trans)glycosidases 8043415 3000313 SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AGlyco_hydro_1e1cbgA1 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: Glyco_hydro_1ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.20.20.80 Alpha Beta Alpha-Beta Barrel TIM Barrel GlycosidasesCATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF00232Glycosyl hydrolase family 1 (Glyco_hydro_1)Glycosyl hydrolase family 1Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
CYANOGENIC BETA-GLUCOSIDASE -

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
IPR001360Glycoside hydrolase family 1Family
IPR017853Glycoside hydrolase superfamilyHomologous Superfamily
IPR033132Glycosyl hydrolases family 1, N-terminal conserved siteConserved Site

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

ChainsEnzyme NameDescriptionCatalytic Residues
beta-glucosidase (GH1)  M-CSA #442

beta-glucosidases are an important group of enzymes that are responsible for cleaving a range of biologically significant compounds. Many show a strict specificity for their substrates although others, like the cyanogenic beta-glucosidase from white clover (CBG) are less stringent, cleaving xylosides and arabinosides as well as glucosides. In general, they hydrolyse terminal, non-reducing beta-D-glucosyl residues with release of beta-D-glucose.

Member of the Glycoside Hydrolase Family 1 (GH1). GH1 comprises enzymes with a number of known activities; beta-glucosidase (EC:3.2.1.21); beta-galactosidase (EC:3.2.1.23); 6-phospho-beta-galactosidase (EC:3.2.1.85); 6-phospho-beta-glucosidase (EC:3.2.1.86); lactase-phlorizin hydrolase (EC:3.2.1.62), (EC:3.2.1.108); beta-mannosidase(EC:3.2.1.25); myrosinase (EC:3.2.1.147). However, we consider myrosinase to be a different entry due to the fact that is lacking in one of the catalytic glutamates (the general acid/base) and cleaves a C-S bond, rather than the C-O bond of this entry (i.e. has a different reactive centre)

Defined by 6 residues: ARG:A-91HIS:A-137GLU:A-183ASN:A-324TYR:A-326GLU:A-397
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Explore in 3D: M-CSA Motif Definition
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EC: 3.2.1.21 (PDB Primary Data)