Leukocidin ED (LukED)

Leukocidin ED is a bicomponent, β-barrel pore-forming toxin produced by Staphylococcus aureus as a major virulence factor[1][7]. The toxin consists of two subunits, LukE and LukD, which assemble on the surface of certain host cells to form octameric pores in the plasma membrane, resulting in the lysis and death of targeted cells, including human erythrocytes (red blood cells) and leukocytes (white blood cells)[1][2][5]. LukED selectively binds to several G protein-coupled chemokine receptors, notably ACKR1 (Duffy antigen receptor for chemokines), CCR2, and CCR5, thereby exhibiting specificity for certain cell types[2]. Its main biological functions are to help the bacterium evade innate immune responses and to promote bacterial survival and proliferation during infection by destroying host phagocytic and erythroid cells[5][7]. LukED plays an important role in the pathogenesis of S. aureus, including methicillin-resistant strains, making it a possible target for future therapeutics aimed at neutralizing its activity or blocking receptor interactions[1][5][7]. Current research is focused on understanding its structure and molecular targets, with the intent of developing new anti-virulence drugs since it is not yet addressed by standard antibiotic therapies[2][5][7].

Other names

LukE-LukDLukEDStaphylococcal leukocidin EDStaphylococcus aureus leukotoxin ED

Pore formation in host cell membranes after binding to specific chemokine receptors (e.g., ACKR1, CCR2, CCR5); causes cell lysis by forming β-barrel pores[2][5][7]