Salmonella enterica serovar Typhimurium outer membrane antigen

Outer membrane antigens of *Salmonella enterica* serovar Typhimurium are a group of surface-exposed proteins and lipopolysaccharide-associated structures embedded within the asymmetric outer membrane of this Gram-negative pathogenic bacterium[3][4]. Prominent outer membrane antigens include porins such as OmpA, OmpC, OmpD, OmpF, and OmpL[3][1]. These proteins play critical roles in bacterial virulence, immune evasion, adaptation to environmental stresses, and structural integrity of the outer membrane[1][4]. They serve as immunodominant antigens capable of eliciting strong humoral and cell-mediated immune responses, and several have been identified as vaccine candidates because of their ability to confer protection in animal models[4][3][1][5]. These proteins are highly conserved among *Salmonella* serovars, although some antigenic variation exists, which impacts vaccine design and immune recognition[3][5]. Outer membrane antigens are not only central to bacterial pathogenesis but also provide promising targets for diagnostics, vaccine development, and potentially for therapeutic antibodies, though no approved drugs currently target these proteins directly[4][5]. Note: The query refers to a group of antigens (outer membrane antigens), not a single molecular entity. This family includes several well-studied proteins (OmpA, OmpC, OmpD, OmpF, OmpL) each with individual characteristics and immunological roles[1][3][4][5].

Other names

Salmonella Typhimurium outer membrane proteinSalmonella Typhimurium outer membrane antigenOuter membrane protein A (OmpA)OmpCOmpDOmpFOmpL

Protective immune response (antibody-mediated); Elicitation of T-cell mediated immunity following antigen presentation; Modulation of antibiotic uptake via porin modification.