LysA is a cell wall endolysin produced by Lactobacillus fermentum, which degrades bacterial cell walls by catalyzing the hydrolysis of 1,4-beta-linkages between N-acetylmuramic acid and N-acetyl-D-glucosamine residues. The N-terminal glycosyl hydrolase family 25 (GH25) domain of LysA has sequence similarity with other murein hydrolase catalytic domains while the C-terminal domain has sequence similarity with putative bacterial cell wall-binding SH3b domains. This domain family also includes LysL of Lactococcus lactis.

Endo-N-acetylmuramidases (muramidases) are lysozymes (also referred to as peptidoglycan hydrolases) that degrade bacterial cell walls by catalyzing the hydrolysis of 1,4-beta-linkages between N-acetylmuramic acid and N-acetyl-D-glucosamine residues. This family of muramidases contains a glycosyl hydrolase family 25 (GH25) catalytic domain and is found in bacteria, fungi, slime molds, round worms, protozoans and bacteriophages. The bacteriophage members are referred to as endolysins which are involved in lysing the host cell at the end of the replication cycle to allow release of mature phage particles. Endolysins are typically modular enzymes consisting of a catalytically active domain that hydrolyzes the peptidoglycan cell wall and a cell wall-binding domain that anchors the protein to the cell wall. Endolysins generally have narrow substrate specificities with either intra-species or intra-genus bacteriolytic activity.

Glycosyl hydrolases family 25.

Lyc muramidase is an autolytic lysozyme (autolysin) from Clostridium acetobutylicum encoded by the lyc gene. Lyc has a glycosyl hydrolase family 25 (GH25) catalytic domain. Endo-N-acetylmuramidases are lysozymes (also referred to as peptidoglycan hydrolases) that degrade bacterial cell walls by catalyzing the hydrolysis of 1,4-beta-linkages between N-acetylmuramic acid and N-acetyl-D-glucosamine residues.

YegX is an uncharacterized bacterial protein with a glycosyl hydrolase family 25 (GH25) catalytic domain that is similar in sequence to the CH-type (Chalaropsis-type) lysozymes of the GH25 family of endolysins.

Crystalstructure of the bacterial lysozyme from Streptomyces coelicolor at 1.65 A resolution [Streptomyces coelicolor]

ChainA, muramidase [Trichobolus zukalii],6ZMV_B Chain B, muramidase [Trichobolus zukalii]

ChainA, Extracellular Protein 6 [Fulvia fulva],4B9H_A Chain A, Extracellular Protein 6 [Fulvia fulva]

Solutionstructure of LysM the peptidoglycan binding domain of autolysin AtlA from Enterococcus faecalis [Enterococcus faecalis V583]

Crystalstructure of MoCVNH3 variant (Mo0v) [Pyricularia oryzae],5C8P_A Crystal structure of MoCVNH3 variant (Mo0v) in complex with (N-GlcNAc)3 [Pyricularia oryzae],5C8Q_B Crystal structure of MoCVNH3 variant (Mo0v) in complex with (N-GlcNAc)4 [Pyricularia oryzae]

N-acetylmuramoyl-L-alanine amidase sle1 OS=Staphylococcus saprophyticus subsp. saprophyticus (strain ATCC 15305 / DSM 20229 / NCIMB 8711 / NCTC 7292 / S-41) OX=342451 GN=sle1 PE=3 SV=1

N-acetylmuramoyl-L-alanine amidase sle1 OS=Staphylococcus aureus (strain N315) OX=158879 GN=sle1 PE=1 SV=1

N-acetylmuramoyl-L-alanine amidase sle1 OS=Staphylococcus aureus (strain MW2) OX=196620 GN=sle1 PE=3 SV=1

N-acetylmuramoyl-L-alanine amidase sle1 OS=Staphylococcus aureus (strain USA300) OX=367830 GN=sle1 PE=3 SV=1

N-acetylmuramoyl-L-alanine amidase sle1 OS=Staphylococcus aureus (strain NCTC 8325 / PS 47) OX=93061 GN=sle1 PE=1 SV=1