Annotations: 1HTR

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A [auth P]	d1htr.1	All beta proteins	Acid proteases	Acid proteases	Pepsin-like	Pepsin(ogen)	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d1htr.1	All beta proteins	Acid proteases	Acid proteases	Pepsin-like	Pepsin(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)
B	SCOP2B Superfamily	Acid proteases	8066369	3001059	SCOP2B (2022-06-29)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A [auth P]	6.10.140.60	Special	Helix non-globular	Helix Hairpins		CATH (4.3.0)
B	2.40.70.10	Mainly Beta	Beta Barrel	Cathepsin D, subunit A	domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth P]	PF07966	A1 Propeptide (A1_Propeptide)	A1 Propeptide	-	Motif
B	PF00026	Eukaryotic aspartyl protease (Asp)	Eukaryotic aspartyl protease	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth P]	PROGASTRICSIN (PRO SEGMENT)	aspartic-type peptidase activity peptidase activity catalytic activity, acting on a protein hydrolase activity aspartic-type endopeptidase activity catalytic activity endopeptidase activity	regulation of humoral immune response antibacterial peptide production regulation of immune effector process positive regulation of response to biotic stimulus regulation of cellular process response to stimulus positive regulation of macromolecule biosynthetic process response to biotic stimulus positive regulation of metabolic process antimicrobial humoral immune response mediated by antimicrobial peptide positive regulation of immune response response to bacterium organic substance biosynthetic process regulation of immune system process regulation of humoral immune response antibacterial peptide production regulation of immune effector process positive regulation of response to biotic stimulus regulation of cellular process response to stimulus positive regulation of macromolecule biosynthetic process response to biotic stimulus positive regulation of metabolic process antimicrobial humoral immune response mediated by antimicrobial peptide positive regulation of immune response response to bacterium organic substance biosynthetic process regulation of immune system process positive regulation of macromolecule metabolic process positive regulation of immune system process regulation of biological process response to other organism immune response cellular metabolic process response to external stimulus regulation of cellular metabolic process immune effector process regulation of gene expression biosynthetic process regulation of response to stimulus defense response to other organism positive regulation of defense response positive regulation of production of molecular mediator of immune response regulation of immune response metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of production of molecular mediator of immune response regulation of metabolic process regulation of defense response humoral immune response regulation of response to biotic stimulus biological process involved in interspecies interaction between organisms regulation of response to external stimulus cellular biosynthetic process positive regulation of biological process regulation of antibacterial peptide production positive regulation of cellular metabolic process antimicrobial humoral response positive regulation of response to stimulus defense response to bacterium positive regulation of defense response to bacterium positive regulation of antimicrobial peptide production positive regulation of humoral immune response organic substance metabolic process positive regulation of response to external stimulus positive regulation of biosynthetic process antimicrobial peptide production response to stress regulation of response to stress positive regulation of immune effector process response to external biotic stimulus positive regulation of cellular process production of molecular mediator of immune response regulation of biosynthetic process regulation of defense response to bacterium regulation of antimicrobial humoral response defense response biological regulation defense response to symbiont antibacterial humoral response regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of cellular biosynthetic process positive regulation of antimicrobial humoral response regulation of antimicrobial peptide production positive regulation of gene expression immune system process positive regulation of antibacterial peptide production cellular process positive regulation of cellular biosynthetic process organonitrogen compound metabolic process proteolysis primary metabolic process protein metabolic process multicellular organismal process digestion	extracellular region extracellular space cellular anatomical entity
B	GASTRICSIN	aspartic-type peptidase activity peptidase activity catalytic activity, acting on a protein hydrolase activity aspartic-type endopeptidase activity catalytic activity endopeptidase activity	regulation of humoral immune response antibacterial peptide production regulation of immune effector process positive regulation of response to biotic stimulus regulation of cellular process response to stimulus positive regulation of macromolecule biosynthetic process response to biotic stimulus positive regulation of metabolic process antimicrobial humoral immune response mediated by antimicrobial peptide positive regulation of immune response response to bacterium organic substance biosynthetic process regulation of immune system process regulation of humoral immune response antibacterial peptide production regulation of immune effector process positive regulation of response to biotic stimulus regulation of cellular process response to stimulus positive regulation of macromolecule biosynthetic process response to biotic stimulus positive regulation of metabolic process antimicrobial humoral immune response mediated by antimicrobial peptide positive regulation of immune response response to bacterium organic substance biosynthetic process regulation of immune system process positive regulation of macromolecule metabolic process positive regulation of immune system process regulation of biological process response to other organism immune response cellular metabolic process response to external stimulus regulation of cellular metabolic process immune effector process regulation of gene expression biosynthetic process regulation of response to stimulus defense response to other organism positive regulation of defense response positive regulation of production of molecular mediator of immune response regulation of immune response metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of production of molecular mediator of immune response regulation of metabolic process regulation of defense response humoral immune response regulation of response to biotic stimulus biological process involved in interspecies interaction between organisms regulation of response to external stimulus cellular biosynthetic process positive regulation of biological process regulation of antibacterial peptide production positive regulation of cellular metabolic process antimicrobial humoral response positive regulation of response to stimulus defense response to bacterium positive regulation of defense response to bacterium positive regulation of antimicrobial peptide production positive regulation of humoral immune response organic substance metabolic process positive regulation of response to external stimulus positive regulation of biosynthetic process antimicrobial peptide production response to stress regulation of response to stress positive regulation of immune effector process response to external biotic stimulus positive regulation of cellular process production of molecular mediator of immune response regulation of biosynthetic process regulation of defense response to bacterium regulation of antimicrobial humoral response defense response biological regulation defense response to symbiont antibacterial humoral response regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of cellular biosynthetic process positive regulation of antimicrobial humoral response regulation of antimicrobial peptide production positive regulation of gene expression immune system process positive regulation of antibacterial peptide production cellular process positive regulation of cellular biosynthetic process organonitrogen compound metabolic process proteolysis primary metabolic process protein metabolic process multicellular organismal process digestion	extracellular region extracellular space cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth P]	IPR012848	Aspartic peptidase, N-terminal	Domain
A [auth P]	IPR033121	Peptidase family A1 domain	Domain
A [auth P]	IPR001461	Aspartic peptidase A1 family	Family
A [auth P]	IPR021109	Aspartic peptidase domain superfamily	Homologous Superfamily
A [auth P]	IPR001969	Aspartic peptidase, active site	Active Site
B	IPR012848	Aspartic peptidase, N-terminal	Domain
B	IPR033121	Peptidase family A1 domain	Domain
B	IPR001461	Aspartic peptidase A1 family	Family
B	IPR021109	Aspartic peptidase domain superfamily	Homologous Superfamily
B	IPR001969	Aspartic peptidase, active site	Active Site

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth P]	Pharos: P20142	colorectal cancer lung cancer pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia diabetes mellitus lung carcinoma psoriasis lung adenocarcinoma non-small cell lung carcinoma sarcoidosis
B	Pharos: P20142	colorectal cancer lung cancer pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia diabetes mellitus lung carcinoma psoriasis lung adenocarcinoma non-small cell lung carcinoma sarcoidosis

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 R01GM133198.