Transglycosylase SLT domain. This family is distantly related to pfam00062. Members are found in phages, type II, type III and type IV secretion systems.

lytic transglycosylase-like domain of tail fiber-like proteins and similar domains. These tail fiber-like proteins are multi-domain proteins that include a lytic transglycosylase (LT) domain. Members of the LT family include the soluble and insoluble membrane-bound LTs in bacteria, the LTs in bacteriophage lambda, and the eukaryotic "goose-type" lysozymes (goose egg-white lysozyme; GEWL). 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.

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.

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.

core lysozyme-like domain of resuscitation-promoting factor proteins. Resuscitation-promoting factor (RPF) proteins, found in various (G+C)-rich Gram-positive bacteria, act to reactivate cultures from stationary phase. This protein shares elements of the structural core of lysozyme and related proteins. Furthermore, it shares a conserved active site glutamate which is required for activity, and has a polysaccharide binding cleft that corresponds to the peptidoglycan binding cleft of lysozyme. Muralytic activity of Rpf in Micrococcus luteus correlates with resuscitation, supporting a mechanism dependent on cleavage of peptidoglycan by RPF.