Microbial cell surface protein and membrane lipid

Microbial cell surface proteins and membrane lipids constitute the essential structural and functional boundary of bacteria and fungi, serving as the primary interface with the host environment (Silhavy et al., 2010, Cold Spring Harb Perspect Biol). These components include a diverse array of molecules such as peptidoglycan, lipopolysaccharides (LPS) in Gram-negative bacteria, and ergosterol in fungal membranes (Mesa-Arango et al., 2012, Front Microbiol). They are critical for maintaining osmotic pressure, facilitating nutrient transport, and mediating adhesion to host cells, which is a prerequisite for colonization and infection (Vollmer et al., 2008, FEMS Microbiol Rev). Because many of these structures are absent or significantly different in mammalian cells, they represent high-value targets for selective antimicrobial therapy. For instance, polymyxins target the LPS of Gram-negative bacteria, while daptomycin interacts with membrane phospholipids to cause rapid depolarization (Humphries et al., 2013, Clin Infect Dis). However, the therapeutic utility of targeting these structures is often challenged by the rapid evolution of resistance mechanisms, such as surface charge modification or the production of protective biofilms (Munita & Arias, 2016, Microbiol Spectr). Additionally, some agents targeting microbial lipids can exhibit toxicity due to limited selectivity against host cell membranes, necessitating careful clinical management (Trimble et al., 2016, Cold Spring Harb Perspect Med).

Other names

Microbial cell envelopeBacterial cell wall and membraneFungal cell wall and membraneSurface antigen

Disruption of membrane integrity, inhibition of cell wall biosynthesis, and interference with surface protein function.