Escherichia coli surface-expressed antigens

Escherichia coli surface-expressed antigens refer to a heterogeneous set of molecular structures located on the external surface of the E. coli cell, including the lipopolysaccharide (LPS) O-antigen, capsular K-antigen, flagellar H-antigen, and a variety of adhesins like Antigen 43. These antigens play central roles in immune evasion, biofilm formation, and virulence, and their immense structural diversity underpins serotyping systems used in diagnostics and epidemiology[2][5][6][7]. Because the term represents a group of targets rather than a single molecular entity, structured information needs to be obtained for each antigen individually for precise scientific or therapeutic work. Key notes: - The entity is too broad and not a canonical molecular target name; it refers to a collection of targets, each meriting its own entry. - If a structured database is sought, O-antigen (LPS), K-antigen (Capsule), H-antigen (Flagellin), and one or more specific surface proteins (e.g., Antigen 43) should each be considered individual targets[2][4][5][7]. - "Escherichia coli surface-expressed antigens" is extensively used in the context of serotyping and vaccine/antibody development, but not a standardized singular target.

Other names

O-antigenK-antigenH-antigenAntigen 43 (Ag43)surface antigenssurface adhesin

Immune recognition and neutralization (polyclonal or monoclonal antibodies bind to surface antigens and facilitate opsonization and clearance); Prevention of adherence/biofilm formation by targeting adhesins (e.g., Ag43 inhibition disrupts aggregation)