Pseudomonas aeruginosa outer membrane protein (OMP) (OMP)

Pseudomonas aeruginosa outer membrane proteins (OMPs) are a diverse group of proteins essential for the structural integrity, nutrient acquisition, and environmental adaptation of this Gram-negative opportunistic pathogen. These proteins are categorized into general porins, specific porins, and gated receptors, with OprF being the most abundant structural porin that maintains cell shape and mediates host cell adhesion. OMPs are critically involved in the pathogen's high level of antibiotic resistance; for instance, the loss or downregulation of the OprD porin is a primary mechanism for resistance to carbapenem antibiotics, which normally enter the cell through this channel. Additionally, OMPs like OprM function as the outer membrane exit port for multidrug efflux pumps, actively removing various classes of antibiotics from the periplasm. Due to their surface exposure and essential roles in virulence and survival, OMPs are prominent targets for the development of novel antibiotics, monoclonal antibodies, and vaccines. Therapeutic strategies include using OMPs as entry ports for siderophore-conjugated drugs like cefiderocol or targeting them with cationic antimicrobial peptides that disrupt membrane stability.

Other names

Pseudomonas aeruginosa outer membrane proteinsP. aeruginosa OMPsOuter membrane porinsOuter membrane lipoproteinsOprDOprFOprMOprIOprL

Drugs interact with OMPs by utilizing them as passive entry channels (e.g., carbapenems via OprD), disrupting their structural integrity and the surrounding lipid environment (e.g., polymyxins), or exploiting them for active transport via siderophore-mediated pathways (e.g., cefiderocol). Experimental vaccines and monoclonal antibodies target OMPs to induce opsonophagocytosis, neutralize virulence factors, or block bacterial adhesion to host tissues.