CATH Domain 3i3tC00

CATH Classification

Level	CATH Code	Description
	3	Alpha Beta
	3.90	Alpha-Beta Complex
	3.90.70	Cathepsin B; Chain A
	3.90.70.10	Cysteine proteinases

Domain Context

CATH Clusters

Superfamily	Cysteine proteinases
Functional Family	Ubiquitin carboxyl-terminal hydrolase 21

Enzyme Information

3.4.19.12

Ubiquitinyl hydrolase 1.

based on mapping to UniProt Q9UK80

Thiol-dependent hydrolysis of ester, thioester, amide, peptide and isopeptide bonds formed by the C-terminal Gly of ubiquitin (a 76-residue protein attached to proteins as an intracellular targeting signal).

-!- Links to polypeptides smaller than 60 residues are hydrolyzed more readily than those to larger polypeptides. -!- Isoforms exist with quantitatively different specificities among the best known being UCH-L1 and UCH-L3, major proteins of the brain of mammals. -!- Inhibited by ubiquitin aldehyde (in which Gly76 is replaced by aminoacetaldehyde). -!- Belongs to peptidase family C12.

UniProtKB Entries (1)

Q9UK80

UBP21_HUMAN

Homo sapiens

Ubiquitin carboxyl-terminal hydrolase 21

PDB Structure

PDB	3I3T
External Links	PDBSum Proteopedia
Method	X-RAY DIFFRACTION
Organism
Primary Citation	A strategy for modulation of enzymes in the ubiquitin system. Ernst, A., Avvakumov, G., Tong, J., Fan, Y., Zhao, Y., Alberts, P., Persaud, A., Walker, J.R., Neculai, A.M., Neculai, D., Vorobyov, A., Garg, P., Beatty, L., Chan, P.K., Juang, Y.C., Landry, M.C., Yeh, C., Zeqiraj, E., Karamboulas, K., Allali-Hassani, A., Vedadi, M., Tyers, M., Moffat, J., Sicheri, F., Pelletier, L., Durocher, D., Raught, B., Rotin, D., Yang, J., Moran, M.F., Dhe-Paganon, S., Sidhu, S.S. Science