Bacterial plasma membrane and cell wall

The **bacterial plasma membrane and cell wall** together form the bacterial cell envelope, a fundamental structural and functional barrier not found in humans, which is critical for bacterial viability and pathogenicity[1][4][6][9]. The **plasma membrane** is a phospholipid bilayer controlling permeability, mediating energy generation and transport, and housing enzymes critical for processes like respiration and synthesis of structural cell wall precursors[1][6][7]. The **cell wall**—mainly peptidoglycan in bacteria—provides rigidity, determines shape, and protects against osmotic lysis and environmental insults[3][5][9]. The envelope is essential for growth, virulence, and survival, and includes additional outer membrane structures in Gram-negative bacteria[1][4][5]. Due to its absence from human cells and essentiality to bacteria, the cell envelope is a primary and proven antibiotic target, with major drug classes including β-lactams, glycopeptides, and others that disrupt wall or membrane integrity[2][10]. Resistance development and inflammation due to cell wall breakdown products (e.g., endotoxin release) remain significant therapeutic challenges[2][4].

Other names

Bacterial cell envelopeProkaryotic plasma membrane and cell wall

Inhibition of peptidoglycan biosynthesis; Disruption of membrane integrity/permeability