sporangiospore maturation cell wall hydrolase GsmA. The peptidoglycan-hydrolyzing enzyme GsmA occurs in some sporangia-forming members of the Actinobacteria, such as Actinoplanes missouriensis, and is required for proper separation of spores. GsmA proteins have one or two SH3 domains N-terminal to the hydrolase domain.

Murein DD-endopeptidase MepM and murein hydrolase activator NlpD, contain LysM domain [Cell wall/membrane/envelope biogenesis].

Flagellum-specific peptidoglycan hydrolase FlgJ [Cell wall/membrane/envelope biogenesis, Cell motility].

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.

Peptidase family M23. Members of this family are zinc metallopeptidases with a range of specificities. The peptidase family M23 is included in this family, these are Gly-Gly endopeptidases. Peptidase family M23 are also endopeptidases. This family also includes some bacterial lipoproteins for which no proteolytic activity has been demonstrated. This family also includes leukocyte cell-derived chemotaxin 2 (LECT2) proteins. LECT2 is a liver-specific protein which is thought to be linked to hepatocyte growth although the exact function of this protein is unknown.

Catalyticdomain of the antimicrobial peptidase lysostaphin from Staphylococcus simulans crystallized in the presence of phosphate [Staphylococcus simulans bv. staphylolyticus],4QP5_B Catalytic domain of the antimicrobial peptidase lysostaphin from Staphylococcus simulans crystallized in the presence of phosphate [Staphylococcus simulans bv. staphylolyticus],4QPB_A Catalytic domain of the antimicrobial peptidase lysostaphin from Staphylococcus simulans crystallized in the absence of phosphate [Staphylococcus simulans],4QPB_B Catalytic domain of the antimicrobial peptidase lysostaphin from Staphylococcus simulans crystallized in the absence of phosphate [Staphylococcus simulans]

NMRsolution structure of lysostaphin [Staphylococcus simulans]

ShyAEndopeptidase from Vibrio cholerae (Closed form) [Vibrio cholerae O1 biovar El Tor str. N16961],6UE4_B ShyA Endopeptidase from Vibrio cholerae (Closed form) [Vibrio cholerae O1 biovar El Tor str. N16961]

ShyAendopeptidase from Vibrio cholera (open form) [Vibrio cholerae]

Theantimicrobial peptidase lysostaphin from Staphylococcus simulans [Staphylococcus simulans],4LXC_B The antimicrobial peptidase lysostaphin from Staphylococcus simulans [Staphylococcus simulans],4LXC_C The antimicrobial peptidase lysostaphin from Staphylococcus simulans [Staphylococcus simulans],4LXC_D The antimicrobial peptidase lysostaphin from Staphylococcus simulans [Staphylococcus simulans]

Uncharacterized metalloprotease HI_0409 OS=Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd) OX=71421 GN=HI_0409 PE=3 SV=1

Uncharacterized metalloprotease BUsg_310 OS=Buchnera aphidicola subsp. Schizaphis graminum (strain Sg) OX=198804 GN=BUsg_310 PE=3 SV=1