2B42

Crystal structure of the Triticum xylanse inhibitor-I in complex with bacillus subtilis xylanase

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

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2b42a1	All beta proteins	Acid proteases	Acid proteases	Pepsin-like	Xylanase inhibitor TAXI-I	(Triticum aestivum ) [TaxId: 4565 ],	SCOPe (2.08)
B	d2b42b_	All beta proteins	Concanavalin A-like lectins/glucanases	Concanavalin A-like lectins/glucanases	Xylanase/endoglucanase 11/12	Xylanase II	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Acid proteases	8040033	3001059	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Concanavalin A-like lectins/glucanases	8039665	3000120	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	PF14541	e2b42A2	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: PF14541	ECOD (1.6)
A	PF14543	e2b42A1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: PF14543	ECOD (1.6)
B	PF00457	e2b42B1	A: beta sandwiches	X: jelly-roll	H: Concanavalin A-like	T: Concanavalin A-like lectins/glucanases	F: PF00457	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.40.70.10	Mainly Beta	Beta Barrel	Cathepsin D, subunit A	domain 1	CATH (4.3.0)
B	2.60.120.180	Mainly Beta	Sandwich	Jelly Rolls	Glycoside hydrolase family 11/12, catalytic domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF14541	Xylanase inhibitor C-terminal (TAXi_C)	Xylanase inhibitor C-terminal	This domain is found C-terminal in some aspartic proteinases and in xylanase inhibitors. The activity of these proteins is vital for plant-survival as xylanase produced by phytopathogens destroys plant cells. In TAXI-type inhibitors, this domain is i ...	This domain is found C-terminal in some aspartic proteinases and in xylanase inhibitors. The activity of these proteins is vital for plant-survival as xylanase produced by phytopathogens destroys plant cells. In TAXI-type inhibitors, this domain is important for the differences in xylanase specificity [1-3].	Domain
A	PF14543	Xylanase inhibitor N-terminal (TAXi_N)	Xylanase inhibitor N-terminal	This domain is found N-terminal in some aspartic proteinases and in xylanase inhibitors. The activity of these proteins is vital for plant-survival as xylanase produced by phytopathogens destroys plant cells [1-3].	Domain
B	PF00457	Glycosyl hydrolases family 11 (Glyco_hydro_11)	Glycosyl hydrolases family 11	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	xylanase inhibitor-I	aspartic-type peptidase activity peptidase activity catalytic activity, acting on a protein hydrolase activity aspartic-type endopeptidase activity catalytic activity endopeptidase activity hydrolase activity, acting on glycosyl bonds	organic substance metabolic process organonitrogen compound metabolic process proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process carbohydrate metabolic process xylan catabolic process catabolic process hemicellulose metabolic process cell wall organization or biogenesis carbohydrate catabolic process hemicellulose catabolic process organic substance metabolic process organonitrogen compound metabolic process proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process carbohydrate metabolic process xylan catabolic process catabolic process hemicellulose metabolic process cell wall organization or biogenesis carbohydrate catabolic process hemicellulose catabolic process macromolecule catabolic process cell wall macromolecule catabolic process xylan metabolic process polysaccharide metabolic process polysaccharide catabolic process cellular process cell wall polysaccharide metabolic process organic substance catabolic process cell wall macromolecule metabolic process cell wall polysaccharide catabolic process	-
B	Endo-1,4-beta-xylanase A	xylanase activity hydrolase activity, acting on glycosyl bonds endo-1,4-beta-xylanase activity hydrolase activity, hydrolyzing O-glycosyl compounds hydrolase activity catalytic activity	carbohydrate metabolic process xylan catabolic process catabolic process hemicellulose metabolic process cell wall organization or biogenesis carbohydrate catabolic process hemicellulose catabolic process primary metabolic process macromolecule catabolic process cell wall macromolecule catabolic process xylan metabolic process polysaccharide metabolic process organic substance metabolic process polysaccharide catabolic process carbohydrate metabolic process xylan catabolic process catabolic process hemicellulose metabolic process cell wall organization or biogenesis carbohydrate catabolic process hemicellulose catabolic process primary metabolic process macromolecule catabolic process cell wall macromolecule catabolic process xylan metabolic process polysaccharide metabolic process organic substance metabolic process polysaccharide catabolic process metabolic process cellular process macromolecule metabolic process cell wall polysaccharide metabolic process organic substance catabolic process cell wall macromolecule metabolic process cell wall polysaccharide catabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR032861	Xylanase inhibitor, N-terminal	Domain
A	IPR033121	Peptidase family A1 domain	Domain
A	IPR001461	Aspartic peptidase A1 family	Family
A	IPR021109	Aspartic peptidase domain superfamily	Homologous Superfamily
A	IPR032799	Xylanase inhibitor, C-terminal	Domain
A	IPR033868	Xylanase inhibitor I-like	Domain
B	IPR001137	Glycoside hydrolase family 11	Family
B	IPR013320	Concanavalin A-like lectin/glucanase domain superfamily	Homologous Superfamily
B	IPR018208	Glycoside hydrolase family 11, active site 1	Active Site
B	IPR013319	Glycoside hydrolase family 11/12	Homologous Superfamily
B	IPR033123	Glycosyl hydrolases family 11 (GH11) domain	Domain
B	IPR033119	Glycoside hydrolase family 11, active site 2	Active Site

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.