Bacterial tetracycline efflux pump (Tet pump) (Tet pump)

Bacterial tetracycline efflux pumps are membrane-bound transport proteins, primarily belonging to the Major Facilitator Superfamily (MFS), that facilitate antibiotic resistance by actively extruding tetracycline from the bacterial cytoplasm (Smyth et al., 2010). These pumps, such as Tet(A) and Tet(K), lower the intracellular concentration of the antibiotic, preventing it from reaching its ribosomal target and thus allowing the bacteria to survive (Li & Nikaido, 2009). Components of garlic extract (Allium sativum), specifically organosulfur compounds like allicin, ajoene, and diallyl sulfides, have been identified as potent inhibitors of these resistance mechanisms (Wallock-Richards et al., 2014). These garlic-derived molecules act as resistance-modifying agents by blocking the efflux activity or downregulating the expression of the associated tet genes, thereby restoring the sensitivity of resistant strains to tetracycline (Bjarnsholt et al., 2005). This interaction is a key area of research for developing synergistic therapies to combat multidrug-resistant bacterial infections. Furthermore, garlic components may also interfere with Quorum Sensing systems that regulate the expression of these resistance factors, providing a multi-targeted approach to overcoming bacterial defenses (Rasmussen et al., 2005).

Other names

Tetracycline resistance proteinTet(A)Tet(K)Tet(B)Major Facilitator Superfamily tetracycline transporter

Inhibition of active efflux transport and downregulation of resistance gene expression