Annotations: 3PSG

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d3psga_	All beta proteins	Acid proteases	Acid proteases	Pepsin-like	Pepsin(ogen)	pig (Sus scrofa ) [TaxId: 9823 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Acid proteases	8042474	3001059	SCOP2B (2022-06-29)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	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	PF07966	A1 Propeptide (A1_Propeptide)	A1 Propeptide	-	Motif
A	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	PEPSINOGEN	aspartic-type peptidase activity peptidase activity catalytic activity, acting on a protein hydrolase activity aspartic-type endopeptidase activity catalytic activity endopeptidase activity	proteolysis metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process multicellular organismal process digestion	cellular anatomical structure extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR001461	Aspartic peptidase A1	Family
A	IPR012848	Aspartic peptidase, N-terminal	Domain
A	IPR034162	Pepsin catalytic domain	Domain
A	IPR033121	Peptidase family A1 domain	Domain
A	IPR021109	Aspartic peptidase domain superfamily	Homologous Superfamily
A	IPR001969	Aspartic peptidase, active site	Active Site

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.