Subtilisin

"Subtilisin is a non-specific protease (a protein-digesting enzyme) initially obtained from Bacillus subtilis. Subtilisins belong to subtilases, a group of serine proteases that - like all serine proteases - initiate the nucleophilic attack on the peptide (amide) bond through a serine residue at the active site."
--https://en.wikipedia.org/wiki/Subtilisin

Of note is that the catalytic mechanism is identical to that of Trypsin.

The STL file contains a representation of the protein in carto