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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad1itxa1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel (Trans)glycosidases Type II chitinase Chitinase A1 (Niallia circulans ) [TaxId: 1397 ], SCOPe (2.08)
Ad1itxa2 Alpha and beta proteins (a+b) FKBP-like Chitinase insertion domain Chitinase insertion domain Chitinase A1 (Niallia circulans ) [TaxId: 1397 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2 FamilyType II chitinase 8027347 4003194 SCOP2 (2022-06-29)
ASCOP2 FamilyChitinase insertion domain 8027349 4001072 SCOP2 (2022-06-29)
ASCOP2 Superfamily(Trans)glycosidases 8039726 3000313 SCOP2 (2022-06-29)
ASCOP2 SuperfamilyChitinase insertion domain 8039728 3000666 SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AChiAe1itxA1 A: a+b two layersX: FKBP-likeH: Chitinase insertion domain (From Topology)T: Chitinase insertion domainF: ChiAECOD (1.6)
AGlyco_hydro_18e1itxA2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: Glyco_hydro_18ECOD (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)
A3.10.50.10 Alpha Beta Roll Chitinase A domain 3CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF00704Glycosyl hydrolases family 18 (Glyco_hydro_18)Glycosyl hydrolases family 18- Domain

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

ChainsEnzyme NameDescriptionCatalytic Residues
chitinase (GH18, class II)  M-CSA #817

Chitinase A1 from Bacillus circulans catalyses the hydrolysis of the 1,4-beta linkages of N-acetyl-D glucosamine polymers of chitin. For bacteria, this hydrolysis is utilised primarily as carbon and energy sources. Chitinase A1 is proposed to be very similar to hen egg-white lysozyme, differing only in that it undergoes a 'substrate assisted' mechanism.

Defined by 4 residues: ASP:A-168 [auth A-200]ASP:A-170 [auth A-202]GLU:A-172 [auth A-204]TYR:A-247 [auth A-279]
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