Microbial cell membrane lipids and proteins

Microbial cell membrane lipids and proteins constitute the essential structural and functional boundary of bacteria and fungi, serving as a critical interface between the organism and its environment [4]. These components are responsible for maintaining osmotic balance, facilitating the transport of nutrients and waste, and housing vital enzymatic complexes for energy production and cell wall biosynthesis [4, 5]. Unlike mammalian membranes, which contain cholesterol, fungal membranes are characterized by ergosterol, and bacterial membranes often possess unique phospholipid compositions such as phosphatidylglycerol or lipopolysaccharides in Gram-negative species [2, 3]. Therapeutic agents like polymyxins and daptomycin exploit these biochemical differences to disrupt membrane integrity, leading to the leakage of intracellular contents and rapid cell death [1, 2]. Because the membrane is fundamental to microbial viability, it remains a primary target for treating multi-drug resistant infections, although selectivity is crucial to avoid toxicity to host cells [1, 3]. This target entry is considered broad as it encompasses a wide array of distinct molecular species rather than a single protein or receptor.

Other names

Bacterial cytoplasmic membraneFungal plasma membraneMicrobial lipid bilayerBacterial membrane proteinsMicrobial cell envelope components

Drugs targeting these components typically act by disrupting the physical integrity of the lipid bilayer, forming transmembrane pores, or inhibiting membrane-associated enzymes, leading to depolarization and leakage of essential ions and metabolites [1, 2, 3].