Annotations: 1FI8

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1fi8a_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Granzyme B	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
D [auth B]	d1fi8b_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Granzyme B	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
B [auth C]	d1fi8.1	All beta proteins	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
E	d1fi8.2	All beta proteins	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
C [auth D]	d1fi8.1	All beta proteins	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
F	d1fi8.2	All beta proteins	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Trypsin-like serine proteases	8042272	3000114	SCOP2B (2022-06-29)
D [auth B]	SCOP2 Family	Eukaryotic proteases	8029893	4000286	SCOP2 (2022-06-29)
D [auth B]	SCOP2 Superfamily	Trypsin-like serine proteases	8042272	3000114	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	Trypsin_1	e1fi8A1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel 2	F: Trypsin_1	ECOD (1.6)
D [auth B]	Trypsin_1	e1fi8B1	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	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)
D [auth B]	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)
B [auth C]	2.60.40.550	Mainly Beta	Sandwich	Immunoglobulin-like	Ecotin	CATH (4.3.0)
E	2.60.40.550	Mainly Beta	Sandwich	Immunoglobulin-like	Ecotin	CATH (4.3.0)
C [auth D]	4.10.1230.10	Few Secondary Structures	Irregular	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	CATH (4.3.0)
F	4.10.1230.10	Few Secondary Structures	Irregular	Ecotin, trypsin inhibitor	Ecotin, trypsin inhibitor	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, D [auth B]	NATURAL KILLER CELL PROTEASE 1	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	lymphocyte mediated immunity biological process involved in interspecies interaction between organisms response to stimulus immune response response to other organism defense response defense response to symbiont response to external stimulus leukocyte mediated cytotoxicity response to biotic stimulus immune effector process immune system process defense response to other organism response to stress natural killer cell mediated cytotoxicity lymphocyte mediated immunity biological process involved in interspecies interaction between organisms response to stimulus immune response response to other organism defense response defense response to symbiont response to external stimulus leukocyte mediated cytotoxicity response to biotic stimulus immune effector process immune system process defense response to other organism response to stress natural killer cell mediated cytotoxicity innate immune response leukocyte mediated immunity cellular process response to external biotic stimulus natural killer cell mediated immunity cell killing regulation of cellular process negative regulation of biological process regulation of primary metabolic process post-transcriptional regulation of gene expression negative regulation of translation negative regulation of cellular process protein metabolic process negative regulation of protein metabolic process negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of biological process regulation of protein metabolic process negative regulation of metabolic process biological regulation primary metabolic process regulation of macromolecule metabolic process gene expression translation macromolecule biosynthetic process regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process regulation of translation negative regulation of macromolecule biosynthetic process regulation of macromolecule biosynthetic process metabolic process macromolecule metabolic process regulation of metabolic process neuron apoptotic process apoptotic process cell death programmed cell death disruption of cell in another organism disruption of anatomical structure in another organism killing of cells of another organism positive regulation of programmed cell death positive regulation of necroptotic process necroptotic process positive regulation of biological process programmed necrotic cell death regulation of programmed cell death regulation of necroptotic process regulation of programmed necrotic cell death positive regulation of cellular process positive regulation of programmed necrotic cell death protein maturation cellular response to stimulus signaling granzyme-mediated programmed cell death signaling pathway cell communication signal transduction catabolic process proteolysis involved in protein catabolic process proteolysis protein catabolic process macromolecule catabolic process adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains T cell mediated cytotoxicity T cell mediated immunity adaptive immune response pyroptotic inflammatory response inflammatory response defense response to bacterium response to bacterium	membrane-bounded organelle intracellular anatomical structure early endosome endosome intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle cellular anatomical structure cytoplasmic vesicle organelle cytoplasm vesicle lytic vacuole membrane-bounded organelle intracellular anatomical structure early endosome endosome intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle cellular anatomical structure cytoplasmic vesicle organelle cytoplasm vesicle lytic vacuole cytolytic granule vacuole lysosome extracellular region extracellular space
B [auth C], E	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 [auth D], F	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

InterPro: Protein Family Classification InterPro Database Homepage

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

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.