Phosphoenolpyruvate:sugar phosphotransferase system (PTS)

The Phosphoenolpyruvate:sugar phosphotransferase system (PTS) is a sophisticated multicomponent system found exclusively in bacteria that facilitates the uptake and concomitant phosphorylation of various simple sugars, such as glucose, mannose, and fructose. It utilizes phosphoenolpyruvate (PEP) as an energy source and phosphoryl donor, transferring a phosphate group through a cascade of proteins (Enzyme I, HPr, and Enzyme II) to the incoming sugar. Beyond its primary role in nutrient acquisition, the PTS acts as a global regulatory hub, controlling carbon catabolite repression and the expression of virulence factors in response to environmental nutrient availability. Because the system is absent in humans and essential for the survival and pathogenicity of many bacteria, it is a high-priority target for the development of novel, narrow-spectrum antibacterial agents. Inhibiting the PTS can effectively starve the pathogen and disrupt its ability to adapt to the host environment, although therapeutic challenges include the risk of affecting beneficial commensal bacteria.

Other names

PEP-dependent phosphotransferase systemSugar phosphotransferase systemBacterial PTSPhosphotransferase systemPTS sugar transporters

Inhibition of sugar translocation and phosphorylation; disruption of carbon catabolite repression (CCR) and intracellular signaling cascades.