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Target intelligence / Profile preview
Shigella O-antigen Polysaccharide (O-antigen)
- Target
- O-antigen
- Molecular classification
- Polysaccharide, Lipopolysaccharide component, Antigen
01
Overview
The Shigella O-antigen polysaccharide is a highly variable surface carbohydrate essential for defining bacterial serotypes. Its structural diversity underpins both immune recognition/evasion strategies used by *Shigella* spp. It serves as an effective vaccine target due to its strong immunogenicity—antibodies directed at this molecule can protect against shigellosis. Genetic variation driven by environmental pressures—including bacteriophage predation—ensures ongoing diversity within populations.
- Other names
- Shigella O-polysaccharideShigella LPS O-antigenO-specific polysaccharideO-antigen polysaccharide
02
Mechanism of action
Antibody-mediated neutralization/opsonization, complement activation
03
Biological functions
Immune evasionSerotype determinationBacteriophage receptorAdhesionVirulence factorAntigen presentation
04
Disease associations
ShigellosisBacterial infectionDysentery
05
Safety considerations
Serotype variability challenges vaccine developmentPotential for immune evasion via O-antigen modificationLimited cross-protection between serotypes
06
Interacting drugs
Conjugate vaccines (O-antigen based)
1 more in the full profile.
07
Biomarkers
O-antigen serotype (for epidemiological studies)Anti-O-antigen antibody titer (vaccine efficacy)
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