Autolysins are direct involved in the bactericidal effect caused by penicillin in wild type and in tolerant pneumococci

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Abstract
The two pneumococcal autolytic enzymes (an N-acetylmuramoyl-L-alanine amidase and an endo-beta-1,4-N-acetylglucosaminidase) are directly involved in the penicillin-induced killing of Streptococcus pneumoniae. The activity of these lytic enzymes was efficiently controlled in tolerant mutants under physiological conditions.