1ITX

Catalytic Domain of Chitinase A1 from Bacillus circulans WL-12

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Structure Motif: Primary M-CSA Annotation

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1itxa1	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	(Trans)glycosidases	Type II chitinase	Chitinase A1	(Niallia circulans ) [TaxId: 1397 ],	SCOPe (2.08)
A	d1itxa2	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

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Type II chitinase	8027347	4003194	SCOP2 (2022-06-29)
A	SCOP2 Family	Chitinase insertion domain	8027349	4001072	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	(Trans)glycosidases	8039726	3000313	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Chitinase insertion domain	8039728	3000666	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	F_UNCLASSIFIED	e1itxA1	A: a+b two layers	X: FKBP-like	H: Chitinase insertion domain (From Topology)	T: Chitinase insertion domain	F: F_UNCLASSIFIED	ECOD (1.6)
A	PF00704	e1itxA2	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: PF00704	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.20.20.80	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Glycosidases	CATH (4.3.0)
A	3.10.50.10	Alpha Beta	Roll	Chitinase A	domain 3	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00704	Glycosyl hydrolases family 18 (Glyco_hydro_18)	Glycosyl hydrolases family 18	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Glycosyl Hydrolase	binding carbohydrate binding chitin binding carbohydrate derivative binding chitinase activity hydrolase activity, acting on glycosyl bonds hydrolase activity, hydrolyzing O-glycosyl compounds hydrolase activity catalytic activity	organonitrogen compound catabolic process carbohydrate derivative catabolic process catabolic process organonitrogen compound metabolic process carbohydrate derivative metabolic process chitin metabolic process aminoglycan catabolic process macromolecule catabolic process glucosamine-containing compound catabolic process organic substance metabolic process amino sugar catabolic process aminoglycan metabolic process amino sugar metabolic process metabolic process organonitrogen compound catabolic process carbohydrate derivative catabolic process catabolic process organonitrogen compound metabolic process carbohydrate derivative metabolic process chitin metabolic process aminoglycan catabolic process macromolecule catabolic process glucosamine-containing compound catabolic process organic substance metabolic process amino sugar catabolic process aminoglycan metabolic process amino sugar metabolic process metabolic process macromolecule metabolic process organic substance catabolic process chitin catabolic process glucosamine-containing compound metabolic process carbohydrate metabolic process carbohydrate catabolic process primary metabolic process polysaccharide metabolic process polysaccharide catabolic process	extracellular region cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR011583	Chitinase II	Domain
A	IPR029070	Chitinase insertion domain superfamily	Homologous Superfamily
A	IPR001579	Glycosyl hydrolases family 18 (GH18) active site	Active Site
A	IPR017853	Glycoside hydrolase superfamily	Homologous Superfamily
A	IPR003961	Fibronectin type III	Domain
A	IPR003610	Carbohydrate binding module family 5/12	Domain
A	IPR001223	Glycoside hydrolase family 18, catalytic domain	Domain
A	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A	IPR036573	Carbohydrate-binding module superfamily 5/12	Homologous Superfamily
A	IPR036116	Fibronectin type III superfamily	Homologous Superfamily

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

Chains	Enzyme Name	Description	Catalytic Residues
A	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] \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 3.2.1.14 (PDB Primary Data) Search M-CSA Motif + EC 3.2.1.14

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.