Peptidoglycan cell wall synthesis enzyme

The bacterial cell wall is a rigid structure surrounding the cell membrane of most bacteria, composed primarily of peptidoglycan, a complex polymer of sugars (N-acetylglucosamine and N-acetylmuramic acid) cross-linked by short peptides[1][2][3][4]. The wall provides mechanical strength, maintains cell shape, and prevents osmotic lysis. Its biosynthesis and remodeling depend on numerous enzymes, including transpeptidases (also known as penicillin-binding proteins), transglycosylases, autolysins, and muramidases[2][3][4]. These enzymes are essential for cell growth and division and are major targets for many classes of antibiotics, such as beta-lactams and glycopeptides[3][4][6]. Inhibition or degradation of the cell wall disrupts bacterial survival, making these enzymes critical therapeutic targets for treating bacterial infections. Modifications in cell wall structure or in these enzymes underlie important mechanisms of antibiotic resistance. Because mammalian cells lack peptidoglycan and these enzymes, drugs targeting them often have high therapeutic specificity and safety[2][4].

Other names

bacterial cell wall biosynthetic enzymespenicillin-binding proteins (subset)transpeptidasetransglycosylaseautolysincell wall hydrolasemuramidaseSEDS proteinspeptidoglycan synthetase

Inhibition of peptidoglycan cross-linking (beta-lactams inhibit penicillin-binding proteins, especially transpeptidases)[2][3][4][6] - Inhibition of cell wall subunit synthesis (fosfomycin, bacitracin) - Inhibition of glycan polymerization (glycopeptides block transglycosylation and transpeptidation steps) - Degradation of peptidoglycan (lysozyme, autolysins, muramidases)[2][3]