Bacteriophage lambda lysozyme and similar proteins
Lysozyme from bacteriophage lambda hydrolyzes the beta-1,4-glycosidic bond between N-acetylmuramic acid (MurNAc) and N-acetylglucosamine (GlcNAc), as do other lysozymes. However, unlike other lysozymes, bacteriophage lambda does not produce a reducing end upon cleavage of the peptidoglycan, but rather uses the 6-OH of the same MurNAc residue to produce a 1,6-anhydromuramic acid terminal residue and is therefore a lytic transglycosylase. An identical 1,6-anhydro bond is formed in bacterial peptidoglycans by the action of the lytic transglycosylases of E. coli, though they differ structurally.
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