Lipid IIIWTA pyrophosphate moiety (Lipid IIIWTA)

Lipid IIIWTA is a critical lipid-linked intermediate in the biosynthesis of wall teichoic acids (WTA) in Gram-positive bacteria. It consists of an undecaprenyl carrier linked via a pyrophosphate (diphosphate) group to a sugar-polyol chain, typically comprising N-acetylglucosamine, N-acetylmannosamine, and glycerol-phosphate or ribitol-phosphate units (Pereira et al., 2008; Brown et al., 2013). The pyrophosphate moiety of Lipid IIIWTA serves as a highly conserved and essential target for a new class of antibiotics, including teixobactin and clovibactin (Ling et al., 2015; Shukla et al., 2023). These drugs bind tightly to the pyrophosphate group, effectively sequestering the precursor and halting the assembly of the bacterial cell wall (Weingarth et al., 2023). Because the pyrophosphate moiety is a fundamental structural component that does not vary between bacterial strains, drugs targeting this site are less prone to the development of resistance. Inhibition of Lipid IIIWTA synthesis leads to a deficiency in WTAs, which are vital for maintaining cell wall integrity, regulating autolytic enzymes, and facilitating host-pathogen interactions (Homma et al., 2016).

Other names

Lipid III (WTA)Wall teichoic acid precursor Lipid IIIUndecaprenyl-pyrophosphate-GlcNAc-ManNAc-GroPUndecaprenyl-diphospho-N-acetylglucosaminyl-N-acetylmannosaminyl-glycerolphosphate

Binding to the conserved pyrophosphate moiety of lipid-linked cell wall precursors, leading to inhibition of wall teichoic acid and peptidoglycan synthesis, and subsequent cell lysis.