Microbial membrane lipids and surface proteins

Microbial membrane lipids and surface proteins represent the fundamental structural and functional boundary between a microbe and its host or environment [12, 15]. This broad category includes essential lipids such as phosphatidylglycerol, cardiolipin, and ergosterol, as well as complex surface molecules like lipopolysaccharides (LPS) and various membrane-anchored proteins [1, 6, 13]. These components are vital for maintaining cellular integrity, facilitating nutrient transport, and mediating host-pathogen interactions such as adhesion and immune evasion [5, 12]. Because many of these structures are unique to microbes, they serve as primary therapeutic targets for a wide range of antibiotics and antifungals [2, 4]. For instance, lipopeptides like daptomycin and polymyxins directly disrupt the lipid bilayer, while glycopeptides like vancomycin target membrane-associated precursors to halt cell wall synthesis [7, 10, 11]. Despite their efficacy, drugs targeting these components often face challenges related to host toxicity—due to similarities between microbial and mammalian membranes—and the ongoing evolution of microbial resistance mechanisms [3, 13, 19].

Other names

Bacterial cell envelope componentsMicrobial surface antigensMembrane-associated microbial targetsFungal cell membrane components

Drugs targeting these components typically act through membrane disruption [3, 4], pore formation [3, 7], inhibition of cell wall synthesis [1, 10], membrane depolarization [9], and lipid phase segregation [6, 8].