CATH Classification

Domain Context

CATH Clusters

Superfamily Trypsin-like serine proteases
Functional Family Replicase polyprotein 1a

Enzyme Information

3.4.22.69
SARS coronavirus main proteinase.
based on mapping to UniProt P0C6T4
TSAVLQ-|-SGFRK-NH(2) and SGVTFQ-|-GKFKK the two peptides corresponding to the two self-cleavage sites of the SARS 3C-like proteinase are the two most reactive peptide substrates. The enzyme exhibits a strong preference for substrates containing Gln at P1 position and Leu at P2 position.
-!- SARS coronavirus main protease is the key enzyme in SARS coronavirus replicase polyprotein processing. -!- Belongs to peptidase family C30.
3.4.19.12
Ubiquitinyl hydrolase 1.
based on mapping to UniProt P0C6T4
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.
3.4.22.-
Cysteine endopeptidases.
based on mapping to UniProt P0C6T4

UniProtKB Entries (1)

P0C6T4
R1A_BCHK4
Tylonycteris bat coronavirus HKU4
Replicase polyprotein 1a

PDB Structure

PDB 2YNA
External Links
Method X-RAY DIFFRACTION
Organism
Primary Citation
Inhibitor for the Main Protease of Coronavirus Hku4
Ma, Q., Xiao, Y., Hilgenfeld, R.
To be Published