What is the role of autolysin in peptidoglycan synthesis and why are these enzymes tightly regulated in bacteria?

Autolysins are bacteriolytic enzymes which digest the cell-wall peptidoglycan of the bacteria that produce them,so potentially these are lethal, autolysins appear to be universal among almost all the bacteria that possess peptidoglycan. Peptidoglycan, is the substrate of autolysins, and is a polymer of amino sugars cross-linked by short peptides that forms a kind of covalent matrix which surrounds the cytoplasmic membrane region and constitutes the major skeletal kind of component of the cell wall.

This is very important for determining cell shape and preventing osmotic lysis under hypotonic conditions. Cell-wall peptidoglycan, very strong, as well as very dynamic: the structure expands as the cell grows and is reshaped when it divides or differentiates. The possibility that autolysins are involved in selective removal of peptidoglycan has led to proposals that they are involved in numerous cellular processes including cell growth, cell-wall turnover, peptidoglycan maturation, cell division, separation, motility, chemotaxis, genetic competence, protein secretion, differentiation and pathogenicity

so there is need for tight regulation to prevent the self destruction