Annotations: 1EZU

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1ezua_	All beta proteins	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
B	d1ezub_	All beta proteins	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
C	d1ezuc_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Trypsin(ogen)	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
D	d1ezud_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Trypsin(ogen)	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Ecotin, trypsin inhibitor	8041127	3001256	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Ecotin, trypsin inhibitor	8041127	3001256	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Trypsin-like serine proteases	8042143	3000114	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Trypsin-like serine proteases	8042143	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)
A	Ecotin	e1ezuA1	A: beta sandwiches	X: Ecotin, trypsin inhibitor (From Topology)	H: Ecotin, trypsin inhibitor (From Topology)	T: Ecotin, trypsin inhibitor	F: Ecotin	ECOD (1.6)
B	Ecotin	e1ezuB1	A: beta sandwiches	X: Ecotin, trypsin inhibitor (From Topology)	H: Ecotin, trypsin inhibitor (From Topology)	T: Ecotin, trypsin inhibitor	F: Ecotin	ECOD (1.6)
C	Trypsin_1	e1ezuC1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel 2	F: Trypsin_1	ECOD (1.6)
D	Trypsin_1	e1ezuD1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel 2	F: Trypsin_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.60.40.550	Mainly Beta	Sandwich	Immunoglobulin-like	Ecotin	CATH (4.3.0)
B	2.60.40.550	Mainly Beta	Sandwich	Immunoglobulin-like	Ecotin	CATH (4.3.0)
C	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)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF03974	Ecotin (Ecotin)	Ecotin	-	Family
C, D	PF00089	Trypsin (Trypsin)	Trypsin	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	ECOTIN	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 identical protein binding protein binding binding protein homodimerization activity protein dimerization activity	response to stimulus defense response response to stress negative regulation of hydrolase activity negative regulation of proteolysis regulation of cellular process regulation of catalytic activity negative regulation of biological process negative regulation of catalytic activity regulation of primary metabolic process negative regulation of peptidase activity regulation of proteolysis proteolysis negative regulation of cellular process response to stimulus defense response response to stress negative regulation of hydrolase activity negative regulation of proteolysis regulation of cellular process regulation of catalytic activity negative regulation of biological process negative regulation of catalytic activity regulation of primary metabolic process negative regulation of peptidase activity regulation of proteolysis proteolysis negative regulation of cellular process protein metabolic process negative regulation of protein metabolic process negative regulation of macromolecule metabolic process regulation of biological process regulation of protein metabolic process negative regulation of metabolic process biological regulation negative regulation of molecular function regulation of peptidase activity primary metabolic process regulation of macromolecule metabolic process regulation of molecular function regulation of hydrolase activity metabolic process cellular process macromolecule metabolic process regulation of metabolic process	cellular anatomical structure outer membrane-bounded periplasmic space cell envelope periplasmic space
C, D	TRYPSIN II, ANIONIC	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding 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	collagen catabolic process catabolic process metabolic process cellular process collagen metabolic process response to nutrient levels response to stimulus response to chemical response to nutrient proteolysis primary metabolic process protein metabolic process macromolecule metabolic process multicellular organismal process collagen catabolic process catabolic process metabolic process cellular process collagen metabolic process response to nutrient levels response to stimulus response to chemical response to nutrient proteolysis primary metabolic process protein metabolic process macromolecule metabolic process multicellular organismal process digestion	cellular anatomical structure extracellular region extracellular space

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR005658	Proteinase inhibitor I11, ecotin	Family
A, B	IPR036198	Ecotin superfamily	Homologous Superfamily
A, B	IPR023084	Proteinase inhibitor I11, ecotin, gammaproteobacteria	Family
A, B	IPR027438	Ecotin, C-terminal	Homologous Superfamily
C, D	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
C, D	IPR001314	Peptidase S1A, chymotrypsin family	Family
C, D	IPR033116	Serine proteases, trypsin family, serine active site	Active Site
C, D	IPR001254	Serine proteases, trypsin domain	Domain
C, D	IPR043504	Peptidase S1, PA clan, chymotrypsin-like fold	Homologous Superfamily
C, D	IPR050127	Serine Proteases (Peptidase S1 Family)	Family
C, D	IPR018114	Serine proteases, trypsin family, histidine active site	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 R01GM157729.