DD-carboxypeptidase/endopeptidase Mpg (EC 3.4.17.-) (EC 3.4.24.-) (Metalloprotease NGO1686) (Metalloprotease active against peptidoglycan) (Outer membrane protein) (OMP) (Virulence factor NG1686) (Zinc metallopeptidase) (Zinc metalloprotease) (Zinc-dependent metallopeptidase)