P40 and P75 Are Singular Functional Muramidases Present in the Taxon.

and proteins P40 and P75 belong to a large family of secreted cell wall proteins that contain a carboxy(C)-terminal CHAP or NlpC/P60 superfamily domains. In addition to their peptidoglycan hydrolases activity, proteins in this family are specific antigens of pathogens, frequently responsible of interactions with the host. GG and BL23 purified P40 and P75 proteins have antiapoptotic activity by inducing the EGF/Akt pathway.