Teichoic acids
Start with the big picture
Teichoic acids consist of glycerol or ribitol phosphate repeats and are characteristic of Gram-positive bacteria; they are absent from several other groups, including Gram-negative bacteria, Mycobacteria, Chlamydiae, and Mycoplasma. Wall teichoic acids attach to peptidoglycan, while lipoteichoic acids span the peptidoglycan layer and are anchored in the plasma membrane. These polymers contribute to cell-wall maintenance and surface charge, and they can participate in adhesion and immune activation. They are also associated with alternative-pathway complement activation and group-specific bacterial antigens. When released during cell lysis, they can contribute to fever and inflammation. The deeper lesson develops these mechanisms and their clinical relevance in a structured review.
What you'll learn
- Distinguish wall teichoic acids from lipoteichoic acids by location and anchoring.
- Describe the bacterial groups in which teichoic acids are absent.
- Summarize teichoic acids’ roles in cell-wall maintenance, adhesion, and immune responses.
- Relate teichoic acids to complement activation, antigen specificity, and inflammation.
Continue your study
Work through the complete notes and reinforce the topic with the study tools available in the full lesson.
