membrane-bound lytic murein transglycosylase F (MLTF) and similar proteins. This subfamily includes membrane-bound lytic murein transglycosylase F (MltF, murein lyase F) that degrades murein glycan strands. It is responsible for catalyzing the release of 1,6-anhydromuropeptides from peptidoglycan. Lytic transglycosylase catalyzes 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, it also makes a new glycosidic bond with the C6 hydroxyl group of the same muramic acid residue.

The solute binding domain of YfhD proteins, a member of the type 2 periplasmic binding fold protein superfamily. This subfamily includes the solute binding domain YfhD_N. These domains are found in the YfhD proteins that are predicted to function as lytic transglycosylases that cleave the glycosidic bond between N-acetylmuramic acid and N-acetylglucosamin in peptidoglycan, while the YfhD_N domain might act as an auxiliary or regulatory subunit. In addition to periplasmic solute binding domain, they have an SLT domain, typically found in soluble lytic transglycosylases, and a C-terminal low complexity domain. The YfhD proteins might have been recruited to create localized cell wall openings required for transport of large substrates such as DNA. They belong to the PBP2 superfamily of periplasmic binding proteins that differ in size and ligand specificity, but have similar tertiary structures consisting of two globular subdomains connected by a flexible hinge. They have been shown to bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap.

Membrane-bound lytic murein transglycosylase MltF [Cell wall/membrane/envelope biogenesis, Signal transduction mechanisms].

membrane-bound lytic murein transglycosylase MltF.

70kDa soluble lytic transglycosylase (Slt70) and similar proteins. Catalytic domain of the 70kda soluble lytic transglycosylase (LT)-like proteins, which also have an N-terminal U-shaped U-domain and a linker L-domain. 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. Proteins similar to this family include the soluble and insoluble membrane-bound LTs in bacteria and the LTs in bacteriophage lambda.

Crystalstructure of MltF from Pseudomonas aeruginosa in complex with NAM-pentapeptide. [Pseudomonas aeruginosa BWHPSA013]

Crystalstructure of MltF from Pseudomonas aeruginosa complexed with isoleucine [Pseudomonas aeruginosa PAO1]

Crystalstructure of MltF from Pseudomonas aeruginosa complexed with cysteine [Pseudomonas aeruginosa PAO1],4OXV_A Crystal structure of MltF from Pseudomonas aeruginosa complexed with valine [Pseudomonas aeruginosa PADK2_CF510],4P0G_A Crystal structure of MltF from Pseudomonas aeruginosa complexed with bulgecin and muropeptide [Pseudomonas aeruginosa PAO1],4P11_A Native crystal structure of MltF Pseudomonas aeruginosa [Pseudomonas aeruginosa PAO1]

Crystalstructure of MltF from Pseudomonas aeruginosa in complex with cell-wall tetrapeptide [Pseudomonas aeruginosa BWHPSA013],5AA4_D Crystal structure of MltF from Pseudomonas aeruginosa in complex with cell-wall tetrapeptide [Pseudomonas aeruginosa BWHPSA013]

Crystalstructure of MltF from Pseudomonas aeruginosa in complex with cell-wall tetrapeptide [Pseudomonas aeruginosa BWHPSA013],5AA4_C Crystal structure of MltF from Pseudomonas aeruginosa in complex with cell-wall tetrapeptide [Pseudomonas aeruginosa BWHPSA013]

Membrane-bound lytic murein transglycosylase F OS=Desulfococcus oleovorans (strain DSM 6200 / JCM 39069 / Hxd3) OX=96561 GN=mltF PE=3 SV=2

Membrane-bound lytic murein transglycosylase F OS=Colwellia psychrerythraea (strain 34H / ATCC BAA-681) OX=167879 GN=mltF PE=3 SV=2

Membrane-bound lytic murein transglycosylase F OS=Shewanella woodyi (strain ATCC 51908 / MS32) OX=392500 GN=mltF PE=3 SV=1

Membrane-bound lytic murein transglycosylase F OS=Shewanella halifaxensis (strain HAW-EB4) OX=458817 GN=mltF PE=3 SV=1

Membrane-bound lytic murein transglycosylase F OS=Shewanella frigidimarina (strain NCIMB 400) OX=318167 GN=mltF PE=3 SV=1