Annotations: 1LTO

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1ltoa_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Alpha tryptase I	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
D	d1ltod_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Alpha tryptase I	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C	d1ltoc_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Alpha tryptase I	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d1ltob_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Alpha tryptase I	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	8020206	4000286	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Trypsin-like serine proteases	8032586	3000114	SCOP2 (2022-06-29)
D	SCOP2B Superfamily	Trypsin-like serine proteases	8032586	3000114	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Trypsin-like serine proteases	8032586	3000114	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Trypsin-like serine proteases	8032586	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	Trypsin	e1ltoA1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: Trypsin	ECOD (develop294)
D	Peptidase_C4	e1ltoD1	A: alpha bundles	X: Cloacin translocation domain	H: LigT-related	T: LigT-related	F: Peptidase_C4	ECOD (develop294)
C	Peptidase_C4	e1ltoC1	A: alpha bundles	X: Cloacin translocation domain	H: LigT-related	T: LigT-related	F: Peptidase_C4	ECOD (develop294)
B	Peptidase_C4	e1ltoB1	A: alpha bundles	X: Cloacin translocation domain	H: LigT-related	T: LigT-related	F: Peptidase_C4	ECOD (develop294)

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	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)

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
A, B, C, D	alpha tryptase I	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 identical protein binding protein binding binding	cellular component organization cellular component disassembly extracellular matrix disassembly extracellular matrix organization cellular process cellular component organization or biogenesis extracellular structure organization external encapsulating structure organization proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process response to stimulus cellular component organization cellular component disassembly extracellular matrix disassembly extracellular matrix organization cellular process cellular component organization or biogenesis extracellular structure organization external encapsulating structure organization proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process response to stimulus defense response response to stress	cellular anatomical structure extracellular region extracellular space

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	IPR033116	Serine proteases, trypsin family, serine active site	Active Site
A, B, C, D	IPR001254	Serine proteases, trypsin domain	Domain
A, B, C, D	IPR018114	Serine proteases, trypsin family, histidine active site	Active Site
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	Pharos: Q15661	connective tissue disease Flushing contact dermatitis irritable bowel syndrome psoriasis cystic fibrosis lung adenocarcinoma non-small cell lung carcinoma pancreatic intraductal papillary-mucinous carcinoma primary dysautonomia dysautonomia invasive ductal breast carcinoma lung cancer osteosarcoma pancreatic intraductal papillary-mucinous neoplasm connective tissue disease Flushing contact dermatitis irritable bowel syndrome psoriasis cystic fibrosis lung adenocarcinoma non-small cell lung carcinoma pancreatic intraductal papillary-mucinous carcinoma primary dysautonomia dysautonomia invasive ductal breast carcinoma lung cancer osteosarcoma pancreatic intraductal papillary-mucinous neoplasm Ehlers-Danlos syndrome malignant pancreatic neoplasm pancreatic ductal adenocarcinoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia

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.