1CHK

STREPTOMYCES N174 CHITOSANASE PH5.5 298K

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	d1chka_	Alpha and beta proteins (a+b)	Lysozyme-like	Lysozyme-like	Chitosanase	Endochitosanase	(Streptomyces sp. N174 ) [TaxId: 69019 ],	SCOPe (2.08)
B	d1chkb_	Alpha and beta proteins (a+b)	Lysozyme-like	Lysozyme-like	Chitosanase	Endochitosanase	(Streptomyces sp. N174 ) [TaxId: 69019 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Chitosanase	8021686	4000904	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Lysozyme-like	8034066	3001879	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Lysozyme-like	8034066	3001879	SCOP2B (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	PF01374	e1chkA1	A: a+b complex topology	X: Lysozyme-like (From Homology)	H: Lysozyme-like	T: Lysozyme-like	F: PF01374	ECOD (1.6)
B	PF01374	e1chkB1	A: a+b complex topology	X: Lysozyme-like (From Homology)	H: Lysozyme-like	T: Lysozyme-like	F: PF01374	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.141.10	Mainly Alpha	Up-down Bundle	Chitosanase, subunit A	domain 1	CATH (4.3.0)
A	3.30.386.10	Alpha Beta	2-Layer Sandwich	Chitosanase	Chain A, domain 2	CATH (4.3.0)
B	1.20.141.10	Mainly Alpha	Up-down Bundle	Chitosanase, subunit A	domain 1	CATH (4.3.0)
B	3.30.386.10	Alpha Beta	2-Layer Sandwich	Chitosanase	Chain A, domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF01374	Glycosyl hydrolase family 46 (Glyco_hydro_46)	Glycosyl hydrolase family 46	This family are chitosanase enzymes.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	CHITOSANASE	hydrolase activity, acting on glycosyl bonds hydrolase activity, hydrolyzing O-glycosyl compounds hydrolase activity chitosanase activity catalytic activity	carbohydrate metabolic process organic substance metabolic process primary metabolic process metabolic process	extracellular region cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR023099	Glycoside hydrolase, family 46, N-terminal	Homologous Superfamily
A, B	IPR000400	Glycoside hydrolase, family 46	Family
A, B	IPR023346	Lysozyme-like domain superfamily	Homologous Superfamily

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

Chains	Enzyme Name	Description	Catalytic Residues
A	chitosanase M-CSA #448	The enzyme chitosanase is an inverting glycoside hydrolase belonging to family 46. It catalyses the hydrolysis of chitosan, a linear polysaccharide of beta-(1,4)-linked D-glucosamine residues. Many species of soil bacteria, fungi and certain plants express chitosanases capable of degrading chitosan. The enzyme has been implicated in the resistance of E.Coli against the toxic effects of chitosan by breaking the high molecular weight polymer into short chain forms, which are non toxic to the bacteria.	Defined by 3 residues: GLU:A-22ASP:A-40THR:A-45 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif

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.