268331 WD40Thalassiosira pseudonana
GO:0004197 GO:0006508 -
cysteine-type endopeptidase activity
Catalysis of the hydrolysis of internal, alpha-peptide bonds in a polypeptide chain by a mechanism in which the sulfhydryl group of a cysteine residue at the active center acts as a nucleophile.
The hydrolysis of proteins into smaller polypeptides and/or amino acids by cleavage of their peptide bonds.