Microbial cell wall and membrane

The **microbial cell wall and membrane** (collectively, the cell envelope) refer to the essential structures that encase prokaryotic cells, providing shape, structural integrity, protection from osmotic lysis, and selectively controlling entry and exit of substances[1][3][4]. The bacterial cell wall is primarily composed of peptidoglycan, a complex polymer unique to most bacteria, which is cross-linked to confer rigidity[1]. Gram-positive and Gram-negative bacteria differ in cell wall architecture, affecting their staining properties and drug susceptibility. The underlying cytoplasmic membrane is a lipid bilayer rich in proteins, mediating active transport, energy generation (respiration), biosynthesis of essential components, and serving as a platform for cell division[2][3][4][5]. Antibiotics targeting these structures either inhibit synthesis or disrupt integrity, making them critical for antimicrobial therapy. However, "Microbial cell wall and membrane" is not, strictly speaking, a single molecular target but refers to a class of structures; different drugs interact with distinct molecular components within these systems. Thus, the entry is overly broad for a discrete molecular target and is considered incorrect as a canonical, specific drug target[1][3][4][5].

Other names

bacterial cell wallbacterial membraneprokaryotic cell envelopemicrobial envelopecell envelope

Inhibition of peptidoglycan synthesis (beta-lactams, glycopeptides); Disruption of membrane integrity (polymyxins, daptomycin); Inhibition of cell wall precursor transport (bacitracin); Inhibition of cell wall biosynthetic enzymes (fosfomycin)