8PCH

CRYSTAL STRUCTURE OF PORCINE CATHEPSIN H DETERMINED AT 2.1 ANGSTROM RESOLUTION: LOCATION OF THE MINI-CHAIN C-TERMINAL CARBOXYL GROUP DEFINES CATHEPSIN H AMINOPEPTIDASE FUNCTION


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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad8pch.1 Alpha and beta proteins (a+b) Cysteine proteinases Cysteine proteinases Papain-like Cathepsin H (Sus scrofa ) [TaxId: 9823 ], SCOPe (2.08)
B [auth P]d8pch.1 Alpha and beta proteins (a+b) Cysteine proteinases Cysteine proteinases Papain-like Cathepsin H (Sus scrofa ) [TaxId: 9823 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyCysteine proteinases 8066299 3001808 SCOP2B (2022-06-29)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.90.70.10 Alpha Beta Alpha-Beta Complex Cathepsin B Chain ACATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF00112Papain family cysteine protease (Peptidase_C1)Papain family cysteine protease- Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
CATHEPSIN H
B [auth P]CATHEPSIN H

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

ChainsEnzyme NameDescriptionCatalytic Residues
cathepsin H  M-CSA #682

Cathepsin H is a lysosomal cysteine protease, involved in intracellular protein degradation. It is the only known mono-aminopeptidase in the papain-like family and is reported to be involved in tumor metastasis. The enzyme is a relatively abundant protease involved in intracellular protein degradation. It has been proposed that the levels of Cathepsin increase during disease states. Cathepsin H is an aminopeptidase, cleaving a single N-terminal residue from a polypeptide chain. It has been shown that Cathepsin H also exhibits endopeptidase activity. The mature protein consists of three fragments; the N-terminal heavy and C-terminal light chains, and an octapeptide called the mini-chain.

Defined by 3 residues: GLN:A-20 [auth A-19]CYS:A-26 [auth A-25]HIS:A-166 [auth A-159]
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