Peptidoglycans cross-linking

SRRz Bacteriophage X lysis gene cluster S Creates lesions in cytoplasmic membrane R Transglycosylase, degrades murein Rz Cleaves peptidoglycan cross links Kloos et al. (1994)... 

The peptidoglycan cross-linking activity of PBPs, otherwise known as transpeptidase activity, is inhibited by p-lactam antibiotics because of their struc-... 

Peptidoglycan cross-linked polysaccharide in a bacterial cell wall—also known as murein. 

Scheme 6.1. Peptidoglycan cross-linking by transpeptidase enzyme.

Scheme 19.19 Bacterial cell wall peptidoglycan cross-linking reaction. N-Acetylglucosamine (1) and N-acetylmuramic acid...

The remarkable biological effect [1] of P-lactam antibiotics [2] (Scheme 1) results from their capacity to disrupt the biosynthesis of the bacterial cell wall. They do this by inhibiting D,D-transpeptidases [3], which are involved in the peptidoglycan cross-linking. 

The antibacterial activity of BLAs is due to the inhibition of transpeptidase enzymes which are involved in bacterial cell wall biosynthesis. The transpeptidases or PBPs catalyze peptidoglycan cross-linking. 

Figure 4.28 Transpeptidase-catalyzed peptidoglycan cross-linking.

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