Toxic component of a contact-dependent interbacterial competition system (also called effector-immunity systems). Secreted by the SPI-6 type VI secretion system, probably into the periplasm of bacterial target cells. A cell wall amidase with specificity toward the D-meso-DAP-D-alanine bond (D-meso-diaminopimelic-D-alanine) found in peptidoglycan of Gram-negative bacteria. Toxicity is counteracted by a cognate immunity protein Tai2 (t2585), but not immunity proteins associated with a similar endopeptidase in other bacteria. In vitro degrades peptidoglycans from Gram-negative but not Gram-positive bacteria