Escherichia coli outer membrane proteins and related strain-specific surface receptors (E. coli OMPs)

Escherichia coli outer membrane proteins (OMPs) and strain-specific surface receptors are critical components of the Gram-negative bacterial cell envelope, serving as the primary interface between the bacterium and its environment [3, 12]. This group includes general porins like OmpC and OmpF, which facilitate the diffusion of small molecules, and structural proteins like OmpA that maintain membrane integrity and mediate host cell adhesion [8, 12, 15]. Specialized complexes such as the Bam (beta-barrel assembly machine) and Lpt (lipopolysaccharide transport) systems are essential for the biogenesis of the outer membrane itself [4, 5]. Pathogenic strains often express unique surface receptors, such as intimin or fimbrial proteins, which are vital for tissue-specific colonization and virulence [6, 10]. As surface-exposed molecules, these proteins are prime targets for therapeutic intervention, including the development of narrow-spectrum antibiotics, vaccines, and bacteriophage therapies [1, 6, 18]. Targeting these proteins can disrupt essential transport processes, compromise the bacterial permeability barrier, or prevent infection by blocking adhesion to host tissues [4, 5, 19]. However, the high conservation of many OMPs across different E. coli strains poses a challenge for maintaining the health of the commensal gut microbiota [1].

Other names

Escherichia coli outer membrane proteinsE. coli OMPsOuter membrane porinsBacterial surface receptorsE. coli surface antigensOuter membrane beta-barrel proteins

Inhibition of outer membrane biogenesis (e.g., BamA and LptD inhibition), disruption of the bacterial cell membrane integrity, and neutralization of virulence-associated adhesion to host tissues [4, 5, 6].