Lipoteichoic Acid Interactions in Gram-Positive Bacteria
Summary
Lipoteichoic acids (LTAs) are amphiphilic anionic polymers that span the cytoplasmic membrane of Gram-positive bacteria and extend into the peptidoglycan layer. Comprised primarily of glycerolphosphate or ribitolphosphate repeats tethered to a glycolipid anchor, LTAs contribute to cell-surface charge, cation homeostasis and autolysin regulation. Their structural variability—through D-alanine and sugar substitutions—modulates interactions with enzymes involved in cell-wall assembly and turnover, as well as with host immune receptors. LTAs also serve as carriers for polymer biosynthesis, providing a platform for enzymes that assemble teichoic acid chains. These interactions underpin bacterial growth, division and responses to environmental stresses including antimicrobial peptides. The interplay between LTA modifications and cell-surface proteins influences pathogenesis, biofilm formation and antibiotic resistance, making LTA a focal point for novel therapeutic strategies.
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Lipoteichoic Acid Interactions in Gram-Positive Bacteria publication trend
The graph below shows the total number of articles in lipoteichoic acid interactions in gram-positive bacteria across all publications each year (not limited to Nature Index journals).
Technical terms
Lipoteichoic acid (LTA): An anionic polymer of glycerolphosphate or polyribitolphosphate repeats anchored to the cytoplasmic membrane via a glycolipid moiety, involved in cell-wall integrity and host interactions.
Polyribitol phosphate polymerase: Enzyme that catalyses the polymerisation of ribitolphosphate units onto an LTA carrier, producing the teichoic acid backbone.
D-Alanine-activating enzyme: Catalyst that activates D-alanine via ATP-dependent adenylation before transfer to teichoic acid, conferring cationic character and influencing antimicrobial resistance.
Autolysins (peptidoglycan hydrolases): Cell-wall-remodelling enzymes that interact with LTAs to control cell separation and autolysis.
References
- The Synthesis of Polyribitol Phosphate I. PURIFICATION OF POLYRIBITOL PHOSPHATE POLYMERASE AND LIPOTEICHOIC ACID CARRIER. Journal of Biological Chemistry (1974).
- The Synthesis of Polyribitol Phosphate II. ON THE MECHANISM OF POLYRIBITOL PHOSPHATE POLYMERASE. Journal of Biological Chemistry (1974).
- Influence of alanine ester and glycosyl substitution on the lipoteichoic acid carrier activity of lipoteichoic acids.. Journal of Biological Chemistry (1982).
- Biosynthesis of Membrane Teichoic Acid A ROLE FOR THE d-ALANINE-ACTIVATING ENZYME. Journal of Biological Chemistry (1973).
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