Bacterial and fungal cell wall and membrane components

Bacterial and fungal cell wall and membrane components are essential structural and functional elements that define the microbial cell envelope and protect the organism from environmental stress [1.1.1, 1.2.1]. In bacteria, the cell wall is characterized by a peptidoglycan layer that maintains cell shape and prevents osmotic lysis, while the cell membrane acts as a selective barrier for nutrient transport [1.2.3, 1.4.1]. Fungal cell walls are uniquely composed of chitin and beta-glucans, and their membranes contain ergosterol, a sterol absent in human cells [1.3.3, 1.4.3]. These structural differences are exploited by antimicrobial therapies to achieve selective toxicity, targeting pathways that do not exist in the host [1.4.1, 1.4.5]. For instance, beta-lactam antibiotics inhibit the enzymes responsible for peptidoglycan synthesis, while polyenes and azoles target fungal ergosterol to disrupt membrane integrity [1.2.3, 1.4.2]. Despite their success, the clinical utility of drugs targeting these components is increasingly threatened by the evolution of complex resistance mechanisms in both bacterial and fungal pathogens [1.2.3, 1.4.4].

Other names

Cell envelopeMicrobial cell wallMicrobial cell membraneCell envelope components

Inhibition of peptidoglycan cross-linking, disruption of cell membrane integrity, inhibition of ergosterol biosynthesis, and inhibition of beta-(1,3)-D-glucan synthesis.