High Quality Content by WIKIPEDIA articles! Oligopeptidase is an enzyme that cleaves peptides but not proteins, a property that is due to its structure: the active site of this enzyme is located at the end of a narrow cavity which can only be reached by peptides. These oligopeptides, peptides, predominantely smaller than 30 amino acids in length, play essential roles as hormones, in the surveillance against pathogens, and in neurological activities. Therefore these molecules constantly need to be specifically generated and inactivated, which is the role of the oligopeptidases. Oligopeptidase is a term coined in 1979 to designate a sub-group of the endopeptidases, which are not involved in the digestion nor in the processing of proteins like the pancreatic enzymes, proteasomes, cathepsins among many others. The prolyl-oligopeptidase or prolyl endopeptidase (POP) is a good example of how an oligopeptidase interacts with and metabolizes an oligopeptide. The peptide has first to penetrate...

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