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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad1ucha_ Alpha and beta proteins (a+b) Cysteine proteinases Cysteine proteinases Ubiquitin carboxyl-terminal hydrolase UCH-L Ubiquitin carboxyl-terminal hydrolase UCH-l3 human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyCysteine proteinases 8043828 3001808 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
APeptidase_C12e1uchA1 A: a+b complex topologyX: Cysteine proteinases-likeH: Cysteine proteinases (From Topology)T: Cysteine proteinasesF: Peptidase_C12ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.40.532.10 Alpha Beta 3-Layer(aba) Sandwich Ubiquitin C-terminal Hydrolase UCH-l3 Peptidase C12, ubiquitin carboxyl-terminal hydrolaseCATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF01088Ubiquitin carboxyl-terminal hydrolase, family 1 (Peptidase_C12)Ubiquitin carboxyl-terminal hydrolase, family 1- Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
UBIQUITIN C-TERMINAL HYDROLASE UCH-L3

Pharos: Disease Associations Pharos Homepage Annotation

ChainsDrug Target  Associated Disease
PharosP15374

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

ChainsEnzyme NameDescriptionCatalytic Residues
ubiquitinyl hydrolase 1 (peptidase C12 type)  M-CSA #597

Ubiquitin C-terminal hydrolase belongs to the peptidase C12 family and catalyses the hydrolysis of the peptide bond between the C-terminus of ubiquitin and either the epsilon amino group of a lysine residue or the alpha amino group of a protein. Ubiquitin is added enzymatically to the side-chains of lysine residues of acceptor proteins, with polyubiquination possible. The removal of the adducts is important for several reasons. Firstly, ubiquitin genes encode fusion proteins of either alpha-linked polyubiquitin or ubiquitin followed by a C-terminal peptide extension; in both cases proteolytic processing is required to generate ubiquitin monomers. Secondly, proteins are targeted for degradation by attachment of polyubiquitin chains: one ubiquitin molecule is linked to a lysine epsilon amino group of the protein to be targeted, a second ubiquitin is attached to a lysine residue of the first, and so on. Proteolytic processing is therefore required for release of polyubiquitin from the remnants of 26S proteasome substrates and for disassembly of polyubiquitin in order to recycle monomeric ubiquitin.

Ubiquitin C-terminal hydrolases (UCHs) constitute one of two main classes of de-ubiquitinating enzymes, the other being the UBPs (ubiquitin-specific proteases). In yeast UCH and UBP substrate specificities probably overlap, although the physiological substrates of UCH are unclear. Higher organisms can contain several different UCH enzymes, some of which are tissue specific and likely to target distinct substrates. UCHs are quite specific, cleaving only after the C-terminal glycine of ubiqutin.

Defined by 4 residues: GLN:A-89CYS:A-95HIS:A-169ASP:A-184
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