Microbial cell wall integrity

Microbial cell wall integrity refers to the structural and functional maintenance of the complex carbohydrate-rich envelope that surrounds microbial cells, particularly bacteria and fungi. In bacteria, cell wall integrity is chiefly maintained by peptidoglycan biosynthesis and cross-linking, mediated by enzymes such as penicillin-binding proteins. In fungi, integrity depends on components such as chitin, β-glucans, and mannoproteins, and involves dedicated signaling pathways (e.g., the Cell Wall Integrity, or CWI, MAPK pathway). The cell wall is essential for cellular survival, morphology, interaction with the environment, and resistance to stress. Many antibiotics (e.g., β-lactams, glycopeptides) and newer agents (e.g., antimicrobial peptides, autolysins, phage lysins) target cell wall synthesis or integrity, often with high specificity due to differences from mammalian cells. Resistance, especially in bacteria, is an ongoing challenge and a focus for drug development. Disruption of microbial cell wall integrity leads to cell lysis and death, making it a central target for infection control[2][3][4][5][6][8][9][10].

Other names

Bacterial cell wall biosynthesisFungal cell wall integrity pathwayCell wall synthesisCell wall biogenesisCell wall maintenance

Inhibition of peptidoglycan synthesis (blocks cell wall assembly, causes lysis); Binding and inhibition of penicillin-binding proteins (PBPs; β-lactams); Blocking translocation of peptidoglycan subunits (bacitracin); Disruption of membrane integrity (polymyxins, some AMPs); Inhibition of cell wall cross linking or maturation (glycopeptides)