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	ChiA	e1itxA1	A: a+b two layers	X: FKBP-like	H: Chitinase insertion domain (From Topology)	T: Chitinase insertion domain	F: ChiA	ECOD (1.6)
A	Glyco_hydro_18	e1itxA2	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: Glyco_hydro_18	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	carbohydrate derivative catabolic process catabolic process carbohydrate derivative metabolic process chitin metabolic process aminoglycan catabolic process macromolecule catabolic process glucosamine-containing compound catabolic process amino sugar catabolic process aminoglycan metabolic process amino sugar metabolic process metabolic process macromolecule metabolic process chitin catabolic process glucosamine-containing compound metabolic process carbohydrate derivative catabolic process catabolic process carbohydrate derivative metabolic process chitin metabolic process aminoglycan catabolic process macromolecule catabolic process glucosamine-containing compound catabolic process amino sugar catabolic process aminoglycan metabolic process amino sugar metabolic process metabolic process macromolecule metabolic process chitin catabolic process glucosamine-containing compound metabolic process carbohydrate metabolic process polysaccharide metabolic process polysaccharide catabolic process carbohydrate catabolic process primary metabolic process	extracellular region cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR029070	Chitinase insertion domain superfamily	Homologous Superfamily
A	IPR001579	Glycosyl hydrolase family 18, 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	IPR050314	Glycosyl Hydrolase Family 18	Family
A	IPR001223	Glycoside hydrolase family 18, catalytic domain	Domain
A	IPR011583	Chitinase II/V-like, 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 R01GM157729.