Autolysins are involved in some important biological processes such as cell separation, cell-wall turnover, competence for genetic transformation, formation of the flagella and sporulation. Hydrolyzes the link between N-acetylmuramoyl residues and L-amino acid residues in certain cell-wall glycopeptides. Retention of enzymatic activity was limited to the N-terminal fragment (AA 1-196). Belongs to the N-acetylmuramoyl-L-alanine amidase 2 family.