CwlT-like N-terminal lysozyme domain and similar domains. CwlT is a bifunctional cell wall hydrolase containing an N-terminal lysozyme domain and a C-terminal NlpC/P60 endopeptidase domain (gamma-d-D-glutamyl-L-diamino acid endopeptidase), and has been implicated in the spread of transposons. Proteins similar to this family include the soluble and insoluble membrane-bound LTs in bacteria, the LTs in bacteriophage lambda, as well as the eukaryotic "goose-type" lysozymes (goose egg-white lysozyme; GEWL).

Lysozyme-like.

CHAP domain. This domain corresponds to an amidase function. Many of these proteins are involved in cell wall metabolism of bacteria. This domain is found at the N-terminus of Escherichia coli gss, where it functions as a glutathionylspermidine amidase EC:3.5.1.78. This domain is found to be the catalytic domain of PlyCA. CHAP is the amidase domain of bifunctional Escherichia coli glutathionylspermidine synthetase/amidase, and it catalyzes the hydrolysis of Gsp (glutathionylspermidine) into glutathione and spermidine.

lytic transglycosylase(LT)-like domain. Members include the soluble and insoluble membrane-bound LTs in bacteria and LTs in bacteriophage lambda. LTs catalyze the cleavage of the beta-1,4-glycosidic bond between N-acetylmuramic acid (MurNAc) and N-acetyl-D-glucosamine (GlcNAc), as do "goose-type" lysozymes. However, in addition to this, they also make a new glycosidic bond with the C6 hydroxyl group of the same muramic acid residue.

M23 family metallopeptidase, also known as beta-lytic metallopeptidase, and similar proteins. This model describes the metallopeptidase M23 family, which includes beta-lytic metallopeptidase and lysostaphin. Members of this family are zinc endopeptidases that lyse bacterial cell wall peptidoglycans; they cleave either the N-acylmuramoyl-Ala bond between the cell wall peptidoglycan and the cross-linking peptide (e.g. beta-lytic endopeptidase) or a bond within the cross-linking peptide (e.g. stapholysin, and lysostaphin). Beta-lytic metallopeptidase, formerly known as beta-lytic protease, has a preference for cleavage of Gly-X bonds and favors hydrophobic or apolar residues on either side. It inhibits growth of sensitive organisms and may potentially serve as an antimicrobial agent. Lysostaphin, produced by Staphylococcus genus, cleaves pentaglycine cross-bridges of cell wall peptidoglycan, acting as autolysins to maintain cell wall metabolism or as toxins and weapons against competing strains. Staphylolysin (also known as LasA) is implicated in a range of processes related to Pseudomonas virulence, including stimulating shedding of the ectodomain of cell surface heparan sulphate proteoglycan syndecan-1, and elastin degradation in connective tissue. Its active site is less constricted and contains a five-coordinate zinc ion with trigonal bipyramidal geometry and two metal-bound water molecules, possibly contributing to its activity against a wider range of substrates than those used by related lytic enzymes, consistent with its multiple roles in Pseudomonas virulence. The family includes members that do not appear to have the conserved zinc-binding site and might be lipoproteins lacking proteolytic activity.

ChainA, Putative cell wall hydrolase Tn916-like,CTn1-Orf17 [Clostridioides difficile 630],4HPE_B Chain B, Putative cell wall hydrolase Tn916-like,CTn1-Orf17 [Clostridioides difficile 630],4HPE_C Chain C, Putative cell wall hydrolase Tn916-like,CTn1-Orf17 [Clostridioides difficile 630],4HPE_D Chain D, Putative cell wall hydrolase Tn916-like,CTn1-Orf17 [Clostridioides difficile 630],4HPE_E Chain E, Putative cell wall hydrolase Tn916-like,CTn1-Orf17 [Clostridioides difficile 630],4HPE_F Chain F, Putative cell wall hydrolase Tn916-like,CTn1-Orf17 [Clostridioides difficile 630]

ChainA, Similar to lipoprotein, NLP/P60 family [Staphylococcus aureus subsp. aureus Mu50],4FDY_B Chain B, Similar to lipoprotein, NLP/P60 family [Staphylococcus aureus subsp. aureus Mu50]

Pneumococcal vaccine antigen A homolog OS=Streptococcus pyogenes serotype M3 (strain ATCC BAA-595 / MGAS315) OX=198466 GN=pvaA PE=3 SV=1

Pneumococcal vaccine antigen A homolog OS=Streptococcus pyogenes serotype M3 (strain SSI-1) OX=193567 GN=pvaA PE=3 SV=1

Pneumococcal vaccine antigen A homolog OS=Streptococcus pyogenes serotype M6 (strain ATCC BAA-946 / MGAS10394) OX=286636 GN=pvaA PE=3 SV=1

Pneumococcal vaccine antigen A homolog OS=Streptococcus pyogenes serotype M18 (strain MGAS8232) OX=186103 GN=pvaA PE=3 SV=1

Pneumococcal vaccine antigen A homolog OS=Streptococcus pyogenes serotype M1 OX=301447 GN=pvaA PE=3 SV=1