Bacterial and fungal cell wall and membrane structures

Bacterial and fungal cell wall and membrane structures are essential protective barriers that maintain cellular integrity and regulate the transport of molecules [1]. In bacteria, the cell wall is primarily composed of peptidoglycan, a complex polymer of sugars and amino acids, while the outer membrane of Gram-negative bacteria contains lipopolysaccharides [2]. Fungal cell walls are distinct, consisting of chitin, glucans, and mannoproteins, with membranes containing ergosterol instead of cholesterol [3]. These structures are critical for survival against osmotic pressure and environmental stress, making them ideal targets for antimicrobial therapy [4]. Drugs targeting these structures, such as beta-lactams, glycopeptides, and echinocandins, exploit the fundamental differences between microbial and host cell architecture to achieve selective toxicity [5]. Disruption of these components typically leads to cell lysis or growth inhibition, though the emergence of resistance and potential toxicity to host tissues remain significant clinical challenges [6]. Furthermore, the presence of these structures often triggers host immune responses, serving as pathogen-associated molecular patterns (PAMPs) [1, 3]. Understanding the molecular assembly of these envelopes is crucial for developing next-generation antibiotics and antifungals to combat multi-drug resistant pathogens [6].

Other names

Microbial cell envelopeBacterial cell wallFungal cell wallMicrobial plasma membrane

Inhibition of peptidoglycan biosynthesis; Disruption of cell membrane integrity; Inhibition of 1,3-beta-D-glucan synthesis; Binding to ergosterol to create trans-membrane pores; Inhibition of lanosterol 14-alpha-demethylase.