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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad1f34a_ All beta proteins Acid proteases Acid proteases Pepsin-like Pepsin(ogen) (Sus scrofa ) [TaxId: 9823 ], SCOPe (2.08)
Bd1f34b_ Alpha and beta proteins (a+b) Pepsin inhibitor-3 Pepsin inhibitor-3 Pepsin inhibitor-3 Pepsin inhibitor-3 pig roundworm (Ascaris suum ) [TaxId: 6253 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyAcid proteases 8042474 3001059 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyPepsin inhibitor-3 8035718 3001417 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AAsp_Ce1f34A2 A: beta barrelsX: cradle loop barrelH: RIFT-relatedT: acid proteaseF: Asp_CECOD (1.6)
AAsp_Ne1f34A3 A: beta barrelsX: cradle loop barrelH: RIFT-relatedT: acid proteaseF: Asp_NECOD (1.6)
BPepsin-I3e1f34B1 A: a+b duplicates or obligate multimersX: Pepsin inhibitor-3 (From Topology)H: Pepsin inhibitor-3 (From Topology)T: Pepsin inhibitor-3F: Pepsin-I3ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A2.40.70.10 Mainly Beta Beta Barrel Cathepsin D, subunit A domain 1CATH (4.3.0)
B3.30.1120.50 Alpha Beta 2-Layer Sandwich Arylsulfatase, C-terminal domain Pepsin inhibitor-3CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF00026Eukaryotic aspartyl protease (Asp)Eukaryotic aspartyl proteaseAspartyl (acid) proteases include pepsins, cathepsins, and renins. Two-domain structure, probably arising from ancestral duplication. This family does not include the retroviral nor retrotransposon proteases (Pfam:PF00077), which are much smaller a ...Domain
PF06394Pepsin inhibitor-3-like repeated domain (Pepsin-I3)Pepsin inhibitor-3-like repeated domainPepsin inhibitor-3 consisting of two domains, each comprising an antiparallel beta-sheet flanked by an alpha-helix. In the enzyme-inhibitor complex, the N-terminal beta-strand of PI-3 pairs with one strand of the active site flap region of pepsin ...Domain

Protein Modification Annotation

Modified Residue(s)
ChainResidue(s)Description
SEP Parent Component: SER

RESIDAA0037

PSI-MOD :  O-phospho-L-serine MOD:00046