Peptidase that might be involved in pathogen or wound response. Not required for peroxisome biogenesis, indole-3-butyric acid (IBA) metabolism, fatty acid beta-oxidation or degradation of glyoxylate cycle enzymes during seedling development. Binds 1 zinc ion per subunit. No visible phenotype, and full processing of glyoxysomal precursor proteins. Belongs to the peptidase M16 family.