Serralysin (EC 3.4.24.40, Pseudomonas aeruginosa alkaline proteinase, Escherichia freundii proteinase, Serratia marcescens extracellular proteinase, Serratia marcescens metalloproteinase, Pseudomonas aeruginosa alk. protease, Serratia marcescens metalloprotease) is an enzyme. This enzyme catalyses the following chemical reaction Serralysin (EC 3.4.24.40, Pseudomonas aeruginosa alkaline proteinase, Escherichia freundii proteinase, Serratia marcescens extracellular proteinase, Serratia marcescens metalloproteinase, Pseudomonas aeruginosa alk. protease, Serratia marcescens metalloprotease) is an enzyme. This enzyme catalyses the following chemical reaction This extracellular endopeptidase is present in Pseudomonas aeruginosa, Escherichia freundii, Serratia marcescens and Erwinia chrysanthemi.