Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B Superfamily(Trans)glycosidases 8033575 3000313 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyBeta-D-glucan exohydrolase, C-terminal domain 8033576 3001349 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AGlyco_hydro_3e1ex1A1 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: Glyco_hydro_3ECOD (1.6)
AGlyco_hydro_3_Ce1ex1A2 A: a/b three-layered sandwichesX: Flavodoxin-likeH: Beta-D-glucan exohydrolase, C-terminal domain (From Topology)T: Beta-D-glucan exohydrolase, C-terminal domainF: Glyco_hydro_3_CECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.20.20.300 Alpha Beta Alpha-Beta Barrel TIM Barrel Glycoside hydrolase, family 3, N-terminal domainCATH (4.3.0)
A3.40.50.1700 Alpha Beta 3-Layer(aba) Sandwich Rossmann fold Glycoside hydrolase family 3 C-terminal domainCATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF00933Glycosyl hydrolase family 3 N terminal domain (Glyco_hydro_3)Glycosyl hydrolase family 3 N terminal domain- Domain
PF01915Glycosyl hydrolase family 3 C-terminal domain (Glyco_hydro_3_C)Glycosyl hydrolase family 3 C-terminal domainThis domain is involved in catalysis and may be involved in binding beta-glucan [1]. This domain is found associated with Pfam:PF00933.Domain

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

ChainsEnzyme NameDescriptionCatalytic Residues
glucan 1,3-beta-glucosidase  M-CSA #790

Barley beta-D-glucan exohydrolasesbelong to family 3 of glucosyl hydrolases. ExoI is one of two beta-D-glucan exohydrolase isoenzymes that hydrolyse a broad range of substrates with (1-2)-, (1-3)-, (1-4)-, and (1-6)-beta-D-glucosidic linkages. The enzyme removes single glucose units from the non-reducing termini of polymeric and oligomeric substrates with the retention of anomeric configuration. The selective hydrolysis of glycosidic bonds is crucial for key processes of plant development and growth, such as cell wall expansion and degradation, and turnover of signalling molecules.

Defined by 2 residues: ASP:A-285GLU:A-491
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