CATH Classification

Domain Context

CATH Clusters

Superfamily Trypsin-like serine proteases
Functional Family

Enzyme Information

3.4.22.-
Cysteine endopeptidases.
based on mapping to UniProt P0C6U2
3.4.19.12
Ubiquitinyl hydrolase 1.
based on mapping to UniProt P0C6U2
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)

P0C6U2
R1A_CVH22
Human coronavirus 229E
Replicase polyprotein 1a

PDB Structure

PDB 1P9S
External Links
Method X-RAY DIFFRACTION
Organism Escherichia
Primary Citation
Coronavirus Main Proteinase (3CLpro) Structure: Basis for Design of anti-SARS Drugs
Anand, K., Ziebuhr, J., Wadhwani, P., Mesters, J.R., Hilgenfeld, R.
Science
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