Microbial cell wall or membrane

The microbial cell wall and membrane together constitute the cell envelope of bacteria and fungi, providing structural integrity, protection from environmental stresses, and mediating essential transport and energy processes[2][5]. The cell wall is typically composed of peptidoglycan in bacteria (thick in Gram-positive, thin and associated with outer membrane in Gram-negative) or chitin/glucans in fungi. The cell membrane is a phospholipid bilayer containing proteins vital for functions such as transport, respiration, and signal transduction[2][3]. Many antimicrobial drugs directly target the synthesis or integrity of these structures, exploiting differences between microbial and eukaryotic cell envelopes to achieve selective toxicity[5]. Because the term “microbial cell wall or membrane” refers to a collection of molecules and structures rather than a single target, it is too broad for precise scientific or pharmacological use and should be replaced by the specific molecular targets involved in a given context[5].

Other names

Bacterial cell wallBacterial plasma membraneMicrobial cell envelopeFungal cell wallGram-positive cell wallGram-negative cell wall

Inhibition of cell wall synthesis (β-lactams, glycopeptides, fosfomycin, bacitracin)[5] Disruption of membrane integrity (polymyxins, daptomycin)[5] Inhibition of transport or function of membrane-bound proteins (various antibiotics)