Peptidoglycan-recognition protein that plays a key role in innate immunity by binding to peptidoglycans (PGN) of Gram-positive bacteria and activating the Toll pathway. Has no activity against on Gram-negative bacteria and fungi. Shows some partial redundancy with PRPGP-SA in Gram-positive bacteria recognition. May act by activating the proteolytic cleavage of Spatzle and the subsequent activation of Toll pathway. Recognizes S.aureus PGN (By similarity). Belongs to the N-acetylmuramoyl-L-alanine amidase 2 family.