Annotations: 3L3T

Human mesotrypsin complexed with amyloid precursor protein inhibitor variant (APPIR15K)

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)
H	d3l3th_	Small proteins	BPTI-like	BPTI-like	Small Kunitz-type inhibitors & BPTI-like toxins	automated matches	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
G	d3l3tg_	Small proteins	BPTI-like	BPTI-like	Small Kunitz-type inhibitors & BPTI-like toxins	automated matches	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
F	d3l3tf_	Small proteins	BPTI-like	BPTI-like	Small Kunitz-type inhibitors & BPTI-like toxins	automated matches	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
E	d3l3te_	Small proteins	BPTI-like	BPTI-like	Small Kunitz-type inhibitors & BPTI-like toxins	automated matches	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
D	d3l3td_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Trypsin(ogen)	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C	d3l3tc_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Trypsin(ogen)	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d3l3tb_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Trypsin(ogen)	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d3l3ta_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Trypsin(ogen)	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)
D	SCOP2B Superfamily	Trypsin-like serine proteases	8036274	3000114	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Trypsin-like serine proteases	8036274	3000114	SCOP2B (2022-06-29)
B	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)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
H	Trypsin	e3l3tH1	A: alpha arrays	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: Trypsin	ECOD (v295)
G	Trypsin	e3l3tG1	A: alpha arrays	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: Trypsin	ECOD (v295)
F	Trypsin	e3l3tF1	A: alpha arrays	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: Trypsin	ECOD (v295)
E	TetR_C_13_2	e3l3tE1	A: alpha arrays	X: Retrovirus capsid protein	H: Retrovirus capsid protein N-terminal domain	T: Retrovirus capsid protein N-terminal domain	F: TetR_C_13_2	ECOD (v295)
D	Trypsin	e3l3tD1	A: alpha arrays	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: Trypsin	ECOD (v295)
C	Trypsin	e3l3tC1	A: alpha arrays	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: Trypsin	ECOD (v295)
B	Trypsin	e3l3tB1	A: alpha arrays	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: Trypsin	ECOD (v295)
A	Trypsin	e3l3tA1	A: alpha arrays	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: Trypsin	ECOD (v295)

Domain Annotation: CATH CATH Database Homepage

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

Protein Family Annotation Pfam Database Homepage

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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
E, F, G, H	Protein APP	-	-	-
A, B, C, D	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

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
A, B, C, D	IPR001314	Peptidase S1A, chymotrypsin family	Family
A, B, C, D	IPR001254	Serine proteases, trypsin domain	Domain
A, B, C, D	IPR018114	Serine protease-like, trypsin family, histidine active site	Active Site
A, B, C, D	IPR050127	Serine Proteases (Peptidase S1 Family)	Family
A, B, C, D	IPR043504	Peptidase_S1_PA_chymotrypsin	Unknown

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B, C, D	: 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

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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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.