4DG4

Human mesotrypsin-S39Y complexed with bovine pancreatic trypsin inhibitor (BPTI)

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
Pharos: Disease Associations

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
C [auth B]	d4dg4b_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Trypsin(ogen)	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
E [auth D]	d4dg4d_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Trypsin(ogen)	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
G	d4dg4g_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Trypsin(ogen)	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d4dg4a_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Trypsin(ogen)	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B [auth E]	d4dg4e_	Small proteins	BPTI-like	BPTI-like	Small Kunitz-type inhibitors & BPTI-like toxins	Pancreatic trypsin inhibitor, BPTI	domestic cattle (Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)
F	d4dg4f_	Small proteins	BPTI-like	BPTI-like	Small Kunitz-type inhibitors & BPTI-like toxins	Pancreatic trypsin inhibitor, BPTI	domestic cattle (Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)
H	d4dg4h_	Small proteins	BPTI-like	BPTI-like	Small Kunitz-type inhibitors & BPTI-like toxins	Pancreatic trypsin inhibitor, BPTI	domestic cattle (Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)
D [auth C]	d4dg4c_	Small proteins	BPTI-like	BPTI-like	Small Kunitz-type inhibitors & BPTI-like toxins	Pancreatic trypsin inhibitor, BPTI	domestic cattle (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)
C [auth B]	SCOP2B Superfamily	Trypsin-like serine proteases	8036274	3000114	SCOP2B (2022-06-29)
E [auth D]	SCOP2B Superfamily	Trypsin-like serine proteases	8036274	3000114	SCOP2B (2022-06-29)
G	SCOP2B Superfamily	Trypsin-like serine proteases	8036274	3000114	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Trypsin-like serine proteases	8036274	3000114	SCOP2B (2022-06-29)
B [auth E]	SCOP2B Superfamily	BPTI-like	8038485	3000628	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	BPTI-like	8038485	3000628	SCOP2B (2022-06-29)
H	SCOP2B Superfamily	BPTI-like	8038485	3000628	SCOP2B (2022-06-29)
D [auth C]	SCOP2B Superfamily	BPTI-like	8038485	3000628	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)
C [auth B]	Trypsin_1	e4dg4B1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel 2	F: Trypsin_1	ECOD (1.6)
E [auth D]	Trypsin_1	e4dg4D1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel 2	F: Trypsin_1	ECOD (1.6)
G	Trypsin_1	e4dg4G1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel 2	F: Trypsin_1	ECOD (1.6)
A	Trypsin_1	e4dg4A1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel 2	F: Trypsin_1	ECOD (1.6)
B [auth E]	Kunitz_BPTI	e4dg4E1	A: few secondary structure elements	X: BPTI-like (From Topology)	H: BPTI-like (From Topology)	T: BPTI-like	F: Kunitz_BPTI	ECOD (1.6)
F	Kunitz_BPTI	e4dg4F1	A: few secondary structure elements	X: BPTI-like (From Topology)	H: BPTI-like (From Topology)	T: BPTI-like	F: Kunitz_BPTI	ECOD (1.6)
H	Kunitz_BPTI	e4dg4H1	A: few secondary structure elements	X: BPTI-like (From Topology)	H: BPTI-like (From Topology)	T: BPTI-like	F: Kunitz_BPTI	ECOD (1.6)
D [auth C]	Kunitz_BPTI	e4dg4C1	A: few secondary structure elements	X: BPTI-like (From Topology)	H: BPTI-like (From Topology)	T: BPTI-like	F: Kunitz_BPTI	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C [auth B]	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)
E [auth D]	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)
G	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)
A	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)
B [auth E]	4.10.410.10	Few Secondary Structures	Irregular	Factor Xa Inhibitor	Pancreatic trypsin inhibitor Kunitz domain	CATH (4.3.0)
F	4.10.410.10	Few Secondary Structures	Irregular	Factor Xa Inhibitor	Pancreatic trypsin inhibitor Kunitz domain	CATH (4.3.0)
H	4.10.410.10	Few Secondary Structures	Irregular	Factor Xa Inhibitor	Pancreatic trypsin inhibitor Kunitz domain	CATH (4.3.0)
D [auth C]	4.10.410.10	Few Secondary Structures	Irregular	Factor Xa Inhibitor	Pancreatic trypsin inhibitor Kunitz domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, C [auth B], E [auth D], G	PF00089	Trypsin (Trypsin)	Trypsin	-	Domain
B [auth E], D [auth C], F, H	PF00014	Kunitz/Bovine pancreatic trypsin inhibitor domain (Kunitz_BPTI)	Kunitz/Bovine pancreatic trypsin inhibitor domain	Indicative of a protease inhibitor, usually a serine protease inhibitor. Structure is a disulfide rich alpha+beta fold. BPTI (bovine pancreatic trypsin inhibitor) is an extensively studied model structure. Certain family members are similar to the ...	Indicative of a protease inhibitor, usually a serine protease inhibitor. Structure is a disulfide rich alpha+beta fold. BPTI (bovine pancreatic trypsin inhibitor) is an extensively studied model structure. Certain family members are similar to the tick anticoagulant peptide (TAP, Swiss:P17726). This is a highly selective inhibitor of factor Xa in the blood coagulation pathways [1]. TAP molecules are highly dipolar [2], and are arranged to form a twisted two- stranded antiparallel beta-sheet followed by an alpha helix [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, C [auth B], E [auth D], G	PRSS3 protein	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	humoral immune response biological process involved in interspecies interaction between organisms response to stimulus response to other organism defense response immune response defense response to symbiont response to external stimulus antimicrobial humoral response response to biotic stimulus defense response to other organism response to stress immune system process response to external biotic stimulus humoral immune response biological process involved in interspecies interaction between organisms response to stimulus response to other organism defense response immune response defense response to symbiont response to external stimulus antimicrobial humoral response response to biotic stimulus defense response to other organism response to stress immune system process response to external biotic stimulus endothelial cell migration cell migration cellular process cell motility proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process zymogen activation gene expression macromolecule biosynthetic process protein maturation biosynthetic process protein processing multicellular organismal process digestion	membrane-bounded organelle intracellular anatomical structure tertiary granule lumen membrane-enclosed lumen intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle lumen tertiary granule intracellular organelle cellular anatomical structure organelle lumen cytoplasmic vesicle organelle membrane-bounded organelle intracellular anatomical structure tertiary granule lumen membrane-enclosed lumen intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle lumen tertiary granule intracellular organelle cellular anatomical structure organelle lumen cytoplasmic vesicle organelle secretory granule secretory vesicle cytoplasm vesicle extracellular region extracellular space
B [auth E], D [auth C], F, H	Pancreatic trypsin inhibitor	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding 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 cation binding ion binding binding calcium ion binding metal ion binding small molecule binding 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 protein binding enzyme binding zymogen binding protease binding sulfate binding anion binding sulfur compound binding potassium channel regulator activity channel regulator activity transporter inhibitor activity ion channel inhibitor activity ion channel regulator activity potassium channel inhibitor activity transporter regulator activity channel inhibitor activity	negative regulation of hydrolase activity regulation of cellular process negative regulation of proteolysis regulation of serine-type endopeptidase activity regulation of catalytic activity negative regulation of biological process negative regulation of catalytic activity negative regulation of endopeptidase activity regulation of primary metabolic process negative regulation of peptidase activity regulation of proteolysis regulation of serine-type peptidase activity proteolysis regulation of endopeptidase activity negative regulation of cellular process negative regulation of hydrolase activity regulation of cellular process negative regulation of proteolysis regulation of serine-type endopeptidase activity regulation of catalytic activity negative regulation of biological process negative regulation of catalytic activity negative regulation of endopeptidase activity regulation of primary metabolic process negative regulation of peptidase activity regulation of proteolysis regulation of serine-type peptidase activity proteolysis regulation of endopeptidase activity negative regulation of cellular process protein metabolic process negative regulation of protein metabolic process negative regulation of macromolecule metabolic process negative regulation of serine-type endopeptidase activity regulation of biological process negative regulation of serine-type peptidase activity regulation of protein metabolic process negative regulation of metabolic process regulation of peptidase activity biological regulation negative regulation of molecular function 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 multicellular organismal process regulation of body fluid levels response to stimulus regulation of cell activation negative regulation of cell adhesion negative regulation of platelet activation regulation of coagulation regulation of biological quality response to wounding negative regulation of homotypic cell-cell adhesion negative regulation of wound healing negative regulation of blood coagulation response to external stimulus blood coagulation negative regulation of hemostasis regulation of platelet activation regulation of response to stimulus negative regulation of response to external stimulus negative regulation of cell-cell adhesion regulation of wound healing negative regulation of multicellular organismal process platelet activation regulation of response to external stimulus homotypic cell-cell adhesion regulation of response to wounding cell adhesion cell-cell adhesion response to stress regulation of response to stress coagulation regulation of cell-cell adhesion regulation of multicellular organismal process regulation of hemostasis wound healing negative regulation of response to stimulus regulation of homotypic cell-cell adhesion regulation of cell adhesion regulation of blood coagulation hemostasis cell activation negative regulation of platelet aggregation negative regulation of response to wounding platelet aggregation negative regulation of cell activation regulation of platelet aggregation negative regulation of coagulation cellular response to stimulus negative regulation of thrombin-activated receptor signaling pathway signaling negative regulation of signaling regulation of signal transduction negative regulation of G protein-coupled receptor signaling pathway negative regulation of cell communication cell communication thrombin-activated receptor signaling pathway signal transduction regulation of G protein-coupled receptor signaling pathway regulation of signaling regulation of thrombin-activated receptor signaling pathway negative regulation of signal transduction regulation of cell communication G protein-coupled receptor signaling pathway zymogen activation gene expression macromolecule biosynthetic process protein maturation biosynthetic process protein processing trypsinogen activation	protein-containing complex serine protease inhibitor complex protease inhibitor complex peptidase inhibitor complex cellular anatomical structure extracellular region extracellular space

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, C [auth B], E [auth D], G	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
A, C [auth B], E [auth D], G	IPR001314	Peptidase S1A, chymotrypsin family	Family
A, C [auth B], E [auth D], G	IPR001254	Serine proteases, trypsin domain	Domain
A, C [auth B], E [auth D], G	IPR043504	Peptidase S1, PA clan, chymotrypsin-like fold	Homologous Superfamily
A, C [auth B], E [auth D], G	IPR050127	Serine Proteases (Peptidase S1 Family)	Family
A, C [auth B], E [auth D], G	IPR018114	Serine proteases, trypsin family, histidine active site	Active Site
B [auth E], D [auth C], F, H	IPR020901	Proteinase inhibitor I2, Kunitz, conserved site	Conserved Site
B [auth E], D [auth C], F, H	IPR036880	Pancreatic trypsin inhibitor Kunitz domain superfamily	Homologous Superfamily
B [auth E], D [auth C], F, H	IPR002223	Pancreatic trypsin inhibitor Kunitz domain	Domain
B [auth E], D [auth C], F, H	IPR050098	Tissue factor pathway inhibitor/Kunitz-type serine protease inhibitor-like	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, C [auth B], E [auth D], G	Pharos: P35030	urinary bladder cancer primitive neuroectodermal tumor astrocytic tumor diabetes mellitus large cell medulloblastoma malignant mesothelioma oligodendroglioma pancreatic intraductal papillary-mucinous neoplasm Prevention of deep vein thrombosis psoriasis urinary bladder neoplasm atypical teratoid rhabdoid tumor glioblastoma malignant ependymoma malignant pancreatic neoplasm urinary bladder cancer primitive neuroectodermal tumor astrocytic tumor diabetes mellitus large cell medulloblastoma malignant mesothelioma oligodendroglioma pancreatic intraductal papillary-mucinous neoplasm Prevention of deep vein thrombosis psoriasis urinary bladder neoplasm atypical teratoid rhabdoid tumor glioblastoma malignant ependymoma malignant pancreatic neoplasm pancreatic ductal adenocarcinoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia subependymal giant cell astrocytoma cystic fibrosis Hashimoto thyroiditis malignant glioma medulloblastoma pancreatic intraductal papillary-mucinous carcinoma pilocytic astrocytoma

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.