Removes any amino acid from the C-terminus of a long peptide. Digests preferentially peptides containing a positively charged residue in P1' position, as well as arginine, lysine or phenylalanine in P1 position of ester substrate. Catalyzes also peptide synthesis. Inhibited by DFP, and Hg(Cl)2. Optimum pH is 4. Unstable above pH 8. Monomer. In the following growth conditions: acidic pH, absence of nitrogen or carbon source. Belongs to the peptidase S10 family.