Microbial Cell Wall / Membrane

The **microbial cell wall** is a rigid, porous structure composed mostly of **peptidoglycan in bacteria**, providing protection against osmotic lysis, maintaining cell shape, and acting as a filter for large molecules. Many antibiotics exploit the essential and unique components of the microbial cell wall (such as peptidoglycan synthesis enzymes) as high-value drug targets because these structures are absent in human cells, reducing cross-reactivity and toxicity. The **microbial membrane** (often the cytoplasmic membrane or, for Gram-negative bacteria, also the outer membrane) is vital for functions such as substance transport, energy metabolism, and anchoring of biosynthetic enzymes; membrane integrity is also a target for some antibiotics. Because these are structural assemblies, not individual proteins or receptors, "microbial cell wall / membrane" is considered a non-specific, umbrella target category comprising multiple underlying molecular targets (e.g., penicillin-binding proteins, Mur family enzymes, lipid A, LPS biosynthesis enzymes, etc.)

Other names

Bacterial cell wallBacterial membraneMicrobial membraneProkaryotic cell envelope

Inhibition of cell wall biosynthesis (e.g., blocking peptidoglycan crosslinking) Disruption of membrane integrity/permeability Inhibition of peptidoglycan unit transport or polymerization