A proteinase formed by Bacillus subtilis and other species, similar to the serine proteinases of other molds and bacteria; it catalyzes the hydrolysis of a few specific peptide bonds in certain proteins, converting chymotrypsinogen to chymotrypsin and ovalbumin to plakalbumin in this manner, and cleaves pancreatic ribonuclease into S-peptide and S-protein. SYN: subtilopeptidase.
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sub·til·i·sin .səb-'til-ə-sən n an extracellular protease that is secreted by a soil bacterium of the genus Bacillus (B. amyloliquefaciens) and has various commercial uses (as in laundry detergents)
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sub·til·i·sin (səb-tilґĭ-sin) a proteolytic enzyme isolated from strains of the soil bacteria Bacillus subtilis. It catalyzes the hydrolysis of certain peptide bonds, and analysis has shown it to be composed of 274 amino acid residues.Medical dictionary. 2011.