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]

Thestructure of a family GH25 lysozyme from Aspergillus fumigatus [Aspergillus fumigatus Af293],2X8R_B The structure of a family GH25 lysozyme from Aspergillus fumigatus [Aspergillus fumigatus Af293],2X8R_C The structure of a family GH25 lysozyme from Aspergillus fumigatus [Aspergillus fumigatus Af293],2X8R_D The structure of a family GH25 lysozyme from Aspergillus fumigatus [Aspergillus fumigatus Af293],2X8R_E The structure of a family GH25 lysozyme from Aspergillus fumigatus [Aspergillus fumigatus Af293],2X8R_F The structure of a family GH25 lysozyme from Aspergillus fumigatus [Aspergillus fumigatus Af293]

Crystalstructure of the CTP1L endolysin reveals how its activity is regulated by a secondary translation product [Clostridium phage phiCTP1]

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

Lysozyme M1 OS=Streptomyces globisporus OX=1908 GN=acm PE=1 SV=1

Autolytic lysozyme OS=Clostridium acetobutylicum (strain ATCC 824 / DSM 792 / JCM 1419 / LMG 5710 / VKM B-1787) OX=272562 GN=lyc PE=1 SV=1

N,O-diacetylmuramidase OS=Chalaropsis sp. OX=36534 PE=1 SV=1

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 epidermidis (strain ATCC 35984 / RP62A) OX=176279 GN=sle1 PE=3 SV=1