Microbial cell membranes and cell wall structures

Microbial cell membranes and cell wall structures are fundamental components that define the boundary and maintain the viability of bacteria and fungi [1.1.1, 1.1.3]. The bacterial cell wall is primarily composed of peptidoglycan, a complex polymer that provides mechanical strength and prevents osmotic lysis; its synthesis is a major target for bactericidal antibiotics like beta-lactams and glycopeptides [1.1.1, 1.2.2]. The cell membrane is a lipid bilayer that serves as a selective permeability barrier and a scaffold for essential metabolic processes, such as ATP synthesis and nutrient transport [1.2.2, 1.4.1]. In fungi, the cell wall contains unique components like chitin and beta-glucans, while the membrane contains ergosterol instead of cholesterol, providing specific targets for antifungal agents like echinocandins and polyenes [1.2.4]. Drugs targeting these structures often exploit the biochemical differences between microbial and host cells to achieve selective toxicity [1.2.2, 1.2.5]. However, the clinical utility of these agents is frequently challenged by the evolution of resistance mechanisms, including the production of degradative enzymes like beta-lactamases and the modification of target structures [1.1.2, 1.3.4].

Other names

Microbial cell envelopeBacterial cell wall and membraneFungal cell wall and membraneCell envelope structuresMicrobial surface structures

Inhibition of peptidoglycan synthesis and cross-linking (e.g., via PBPs or lipid II sequestration); disruption of cell membrane integrity and permeability; inhibition of fungal cell wall (beta-glucan) synthesis; binding to membrane sterols to form pores; inhibition of ergosterol biosynthesis.