Teichoic acid of bacteria Micrococcaceae
Teicoic acids are polyalcohol polymers (glycerol or ribitol) bound by phosphodiester bonds. These acids are found in the cell wall of Gram-positive bacteria, such as Staphylococcus, Streptococcus, Bacillus, Clostridium, Corynebacterium and Listeria, extending on the surface of the peptidoglycan layer. characteristics
Teicoic acids occur among Gram-positive bacteria. N-acetylmuramic acid of the peptidoglycan layer may be covalently linked or attached to the lipids present in the cytoplasmic membrane. The combined units composed of teichoic acids and lipids are referred to as lipoteichoic acids. Teicoic acids are negatively charged and thus contribute to the negative charge of the Gram-positive cell wall. They can also provide structural support to the cell wall. Functional Properties of Teicoic Acids
1. Give antigenicity factor.
2. It controls the transit of some cations like Mg ++.
3. It regulates the activity of auto lysosomes, so they control autolysis.
4. It promotes bacterial adhesion to epithelia
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