6HAR

Crystal structure of Mesotrypsin in complex with APPI-M17C/I18F/F34C

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	d6hara_	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]	d6hare1	Small proteins	BPTI-like	BPTI-like	Small Kunitz-type inhibitors & BPTI-like toxins	automated matches	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B [auth E]	d6hare2	Artifacts	Tags	Tags	Tags	N-terminal Tags	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Eukaryotic proteases	8100189	4000286	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Trypsin-like serine proteases	8100190	3000114	SCOP2 (2022-06-29)
B [auth E]	SCOP2 Family	Small Kunitz-type inhibitors & BPTI-like toxins	8097893	4003337	SCOP2 (2022-06-29)
B [auth E]	SCOP2 Superfamily	BPTI-like	8097894	3000628	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	e6harA1	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	e6harE1	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)
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)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00089	Trypsin (Trypsin)	Trypsin	-	Domain
B [auth E]	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	PRSS3 protein	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 cation binding ion binding binding metal ion binding small molecule binding	proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process	extracellular region extracellular space cellular anatomical entity
B [auth E]	Amyloid-beta A4 protein	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 cation binding transition metal ion binding ion binding binding metal ion 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 cation binding transition metal ion binding ion binding binding metal ion binding small molecule binding heparin binding glycosaminoglycan binding carbohydrate derivative binding sulfur compound binding	-	membrane-bounded organelle intracellular anatomical structure endosome intracellular vesicle cellular anatomical entity intracellular membrane-bounded organelle endomembrane system intracellular organelle cytoplasmic vesicle organelle cytoplasm vesicle Golgi-associated vesicle cell periphery membrane-bounded organelle intracellular anatomical structure endosome intracellular vesicle cellular anatomical entity intracellular membrane-bounded organelle endomembrane system intracellular organelle cytoplasmic vesicle organelle cytoplasm vesicle Golgi-associated vesicle cell periphery plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR001254	Serine proteases, trypsin domain	Domain
A	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
A	IPR043504	Peptidase S1, PA clan, chymotrypsin-like fold	Homologous Superfamily
A	IPR050127	Serine Proteases (Peptidase S1 Family)	Family
A	IPR018114	Serine proteases, trypsin family, histidine active site	Active Site
A	IPR001314	Peptidase S1A, chymotrypsin family	Family
B [auth E]	IPR036176	E2 domain superfamily	Homologous Superfamily
B [auth E]	IPR019744	Amyloidogenic glycoprotein, copper-binding domain conserved site	Conserved Site
B [auth E]	IPR036454	Amyloidogenic glycoprotein, heparin-binding domain superfamily	Homologous Superfamily
B [auth E]	IPR011178	Amyloidogenic glycoprotein, copper-binding	Domain
B [auth E]	IPR020901	Proteinase inhibitor I2, Kunitz, conserved site	Conserved Site
B [auth E]	IPR036880	Pancreatic trypsin inhibitor Kunitz domain superfamily	Homologous Superfamily
B [auth E]	IPR002223	Pancreatic trypsin inhibitor Kunitz domain	Domain
B [auth E]	IPR008154	Amyloidogenic glycoprotein, extracellular	Domain
B [auth E]	IPR015849	Amyloidogenic glycoprotein, heparin-binding	Domain
B [auth E]	IPR024329	Amyloidogenic glycoprotein, E2 domain	Domain
B [auth E]	IPR036669	Amyloidogenic glycoprotein, copper-binding domain superfamily	Homologous Superfamily
B [auth E]	IPR008155	Amyloidogenic glycoprotein	Family

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.