Catalysis of the specific cleavage of the beta-(1->4) glycosidic linkage between N-acetylmuramyl and N-acetylglucosaminyl residues in peptidoglycan, with the concomitant formation of 1,6-anhydro-N-acetylmuramyl residues.

Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).

Interacting selectively and non-covalently with calcium ions (Ca2+).

Catalysis of the specific cleavage of the beta-(1->4) glycosidic linkage between N-acetylmuramyl and N-acetylglucosaminyl residues in peptidoglycan, with the concomitant formation of 1,6-anhydro-N-acetylmuramyl residues. Acts on linkages within peptidoglycan chains (i.e. not at the ends) to produce shorter strands with 1,6-anhydromuramic acid ends.

Interacting selectively and non-covalently with sodium ions (Na+).

Catalysis of a biochemical reaction at physiological temperatures. In biologically catalyzed reactions, the reactants are known as substrates, and the catalysts are naturally occurring macromolecular substances known as enzymes. Enzymes possess specific binding sites for substrates, and are usually composed wholly or largely of protein, but RNA that has catalytic activity (ribozyme) is often also regarded as enzymatic.