N-acetylmuramoyl-L-alanine amidase. This family includes zinc amidases that have N-acetylmuramoyl-L-alanine amidase activity EC:3.5.1.28. This enzyme domain cleaves the amide bond between N-acetylmuramoyl and L-amino acids in bacterial cell walls (preferentially: D-lactyl-L-Ala). The structure is known for the bacteriophage T7 structure and shows that two of the conserved histidines are zinc binding.

Lysin Motif is a small domain involved in binding peptidoglycan. LysM, a small globular domain with approximately 40 amino acids, is a widespread protein module involved in binding peptidoglycan in bacteria and chitin in eukaryotes. The domain was originally identified in enzymes that degrade bacterial cell walls, but proteins involved in many other biological functions also contain this domain. It has been reported that the LysM domain functions as a signal for specific plant-bacteria recognition in bacterial pathogenesis. Many of these enzymes are modular and are composed of catalytic units linked to one or several repeats of LysM domains. LysM domains are found in bacteria and eukaryotes.

LysM domain. The LysM (lysin motif) domain is about 40 residues long. It is found in a variety of enzymes involved in bacterial cell wall degradation. This domain may have a general peptidoglycan binding function. The structure of this domain is known.

Lysin motif.

Ami_2 domain.

Uncharacterized protein DR_0888 OS=Deinococcus radiodurans (strain ATCC 13939 / DSM 20539 / JCM 16871 / LMG 4051 / NBRC 15346 / NCIMB 9279 / R1 / VKM B-1422) OX=243230 GN=DR_0888 PE=1 SV=1

N-acetylmuramoyl-L-alanine amidase XlyB OS=Bacillus subtilis (strain 168) OX=224308 GN=xlyB PE=3 SV=1

Probable cell wall hydrolase LytN OS=Staphylococcus aureus (strain Mu50 / ATCC 700699) OX=158878 GN=lytN PE=3 SV=2

Probable cell wall hydrolase LytN OS=Staphylococcus aureus (strain MW2) OX=196620 GN=lytN PE=3 SV=2

Probable cell wall hydrolase LytN OS=Staphylococcus aureus (strain N315) OX=158879 GN=lytN PE=3 SV=2