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Target intelligence / Profile preview
Escherichia coli O-antigen Polysaccharides (O-antigen)
- Target
- O-antigen
- Molecular classification
- Polysaccharide, Lipopolysaccharide component
01
Overview
Escherichia coli O-antigen polysaccharides are complex carbohydrate structures that form the outermost part of the lipopolysaccharide (LPS) layer on the surface of Gram-negative E. coli bacteria. The O-antigen is a key determinant of serotype and plays a crucial role in immune evasion, virulence, and host-pathogen interactions. They typically comprise 10–25 repeating units, each containing two to seven sugar residues. Over 180 different E. coli O-serotypes have been described, highlighting the structural diversity.
- Other names
- E. coli O-antigenO-specific polysaccharideO-polysaccharideLPS O-antigen
02
Biological functions
Immune evasionAntigenic variationBacterial virulenceProtection against complement-mediated killingProtection against phagocytosisSerotype determination
03
Disease associations
InfectionPathogenesis of E. coli infections
04
Safety considerations
Antigenic variation can complicate vaccine development.O-antigen diversity poses challenges for broad-spectrum antibacterial therapies.
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