In biology and chemistry, gelatinase is a proteolytic enzyme that allows a living organism to hydrolyse gelatin into its sub-compounds (polypeptides, peptides, and amino acids) that can cross the cell membrane and be used by the organism. It is not a pepsin.
Forms of gelatinases are expressed in several bacteria including Pseudomonas aeruginosa and Serratia marcescens.
In humans, the gelatinases are matrix metalloproteinases MMP2 and MMP9.
Gelatinase is secreted by the stomach.
References
Gelatinase Wikipedia(Text) CC BY-SA