Annotations: 3RU4

Crystal structure of the Bowman-Birk serine protease inhibitor BTCI in complex with trypsin and chymotrypsin

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)
B	d3ru4b_	Small proteins	Knottins (small inhibitors, toxins, lectins)	Bowman-Birk inhibitor, BBI	Bowman-Birk inhibitor, BBI	automated matches	(Vigna unguiculata ) [TaxId: 3917 ],	SCOPe (2.08)
A [auth T]	d3ru4t_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Trypsin(ogen)	(Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2 Family	Bowman-Birk inhibitor, BBI	8070232	4003232	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	Bowman-Birk inhibitor, BBI	8070233	3000463	SCOP2 (2022-06-29)
A [auth T]	SCOP2B Superfamily	Trypsin-like serine proteases	8037496	3000114	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)
E		e3ru4E01	A: beta barrels	X: Voltage-gated ion channels	H: Voltage-gated ion channels	T: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase	F:	ECOD (v294.2)
D	MIF4G	e3ru4D1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: MIF4G	ECOD (v294.2)
B	OSCP	e3ru4B1	A: beta barrels	X: Flavodoxin-like	H: SH3	T: SH3	F: OSCP	ECOD (v294.2)
A [auth T]	OSCP	e3ru4T1	A: beta barrels	X: Flavodoxin-like	H: SH3	T: SH3	F: OSCP	ECOD (v294.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
E	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)
D	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)
B	2.10.69.10	Mainly Beta	Ribbon	Cysteine Protease (Bromelain) Inhibitor, subunit H	Cysteine Protease (Bromelain) Inhibitor, subunit H	CATH (4.3.0)
A [auth T]	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Source
E	PF00089	Trypsin (Trypsin)	Trypsin	Domain
D	PF00089	Trypsin (Trypsin)	Trypsin	Domain
A [auth T]	PF00089	Trypsin (Trypsin)	Trypsin	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
E	Chymotrypsinogen A	peptidase activity catalytic activity, acting on a protein serine hydrolase activity serine-type peptidase activity hydrolase activity serine-type endopeptidase activity catalytic activity endopeptidase activity protein binding binding serpin family protein binding	proteolysis metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process multicellular organismal process digestion	protein-containing complex serine protease inhibitor complex protease inhibitor complex peptidase inhibitor complex cellular anatomical structure extracellular region
D	Chymotrypsinogen A	peptidase activity catalytic activity, acting on a protein serine hydrolase activity serine-type peptidase activity hydrolase activity serine-type endopeptidase activity catalytic activity endopeptidase activity protein binding binding serpin family protein binding	proteolysis metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process multicellular organismal process digestion	protein-containing complex serine protease inhibitor complex protease inhibitor complex peptidase inhibitor complex cellular anatomical structure extracellular region
C	Chymotrypsinogen A	peptidase activity catalytic activity, acting on a protein serine hydrolase activity serine-type peptidase activity hydrolase activity serine-type endopeptidase activity catalytic activity endopeptidase activity protein binding binding serpin family protein binding	proteolysis metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process multicellular organismal process digestion	protein-containing complex serine protease inhibitor complex protease inhibitor complex peptidase inhibitor complex cellular anatomical structure extracellular region
B	Bowman-Birk type seed trypsin and chymotrypsin inhibitor	enzyme regulator activity molecular function inhibitor activity peptidase regulator activity serine-type endopeptidase inhibitor activity molecular function regulator activity enzyme inhibitor activity peptidase inhibitor activity endopeptidase regulator activity endopeptidase inhibitor activity	-	cellular anatomical structure extracellular region
A [auth T]	Cationic trypsin	peptidase activity catalytic activity, acting on a protein hydrolase activity catalytic activity endopeptidase activity serine hydrolase activity serine-type peptidase activity serine-type endopeptidase activity protein binding binding serpin family protein binding cation binding ion binding metal ion binding peptidase activity catalytic activity, acting on a protein hydrolase activity catalytic activity endopeptidase activity serine hydrolase activity serine-type peptidase activity serine-type endopeptidase activity protein binding binding serpin family protein binding cation binding ion binding metal ion binding small molecule binding	proteolysis metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process multicellular organismal process digestion	protein-containing complex serine protease inhibitor complex protease inhibitor complex peptidase inhibitor complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
E	IPR001254	Serine proteases, trypsin domain	Domain
E	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
E	IPR018114	Serine protease-like, trypsin family, histidine active site	Active Site
E	IPR001314	Peptidase S1A, chymotrypsin family	Family
E	IPR043504	Peptidase_S1_PA_chymotrypsin	Unknown
E	IPR033116	Serine proteases, trypsin family, serine active site	Active Site
D	IPR001254	Serine proteases, trypsin domain	Domain
D	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
D	IPR018114	Serine protease-like, trypsin family, histidine active site	Active Site
D	IPR001314	Peptidase S1A, chymotrypsin family	Family
D	IPR043504	Peptidase_S1_PA_chymotrypsin	Unknown
D	IPR033116	Serine proteases, trypsin family, serine active site	Active Site
C	IPR001254	Serine proteases, trypsin domain	Domain
C	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
C	IPR018114	Serine protease-like, trypsin family, histidine active site	Active Site
C	IPR001314	Peptidase S1A, chymotrypsin family	Family
C	IPR043504	Peptidase_S1_PA_chymotrypsin	Unknown
C	IPR033116	Serine proteases, trypsin family, serine active site	Active Site
B	IPR000877	Proteinase inhibitor I12, Bowman-Birk	Domain
B	IPR035995	Bowman-Birk type proteinase inhibitor	Homologous Superfamily
A [auth T]	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
A [auth T]	IPR001314	Peptidase S1A, chymotrypsin family	Family
A [auth T]	IPR033116	Serine proteases, trypsin family, serine active site	Active Site
A [auth T]	IPR001254	Serine proteases, trypsin domain	Domain
A [auth T]	IPR018114	Serine protease-like, trypsin family, histidine active site	Active Site
A [auth T]	IPR050127	Serine Proteases (Peptidase S1 Family)	Family
A [auth T]	IPR043504	Peptidase_S1_PA_chymotrypsin	Unknown