Bacterial adhesin

Bacterial adhesion refers to the process by which bacteria attach themselves to surfaces—including host tissues—primarily through specialized surface proteins called **adhesins**. These proteins are critical virulence factors for many pathogenic bacteria and are essential in the early stages of infection. Adhesins can be monomeric proteins anchored directly to the bacterial surface or polymeric structures such as pili or fimbriae that extend from the cell surface. The best-characterized example is FimH, a type 1 fimbrial adhesin in Escherichia coli that mediates D-mannose-sensitive binding and is crucial for urinary tract colonization[1][3]. Other notable examples include SiiE and BapA in Salmonella enterica and LapA in Pseudomonas species[2][5][7]. Adhesion enables bacteria to resist physical removal mechanisms like fluid flow (e.g., urine), initiate colonization, form biofilms, communicate with other cells, and establish infections. Disrupting bacterial adhesion has been explored as a therapeutic strategy; inhibiting even a single key adhesin can render some pathogens nonvirulent[1]. Drugs such as mannosides target specific interactions between bacterial adhesins and their ligands. The term "bacterial adhesion" itself does not refer to a single molecular entity but rather describes a biological process mediated by various molecules—primarily **bacterial adhesins**—which should be considered the actual therapeutic targets. Therefore, "Bacterial adhesion" is not an individual molecule or receptor but an umbrella term encompassing multiple structurally diverse proteins with similar functions across different species; this makes it an imprecise target name for structured data purposes[1][3]. In summary: > Bacterial adhesion is mediated by diverse surface-exposed adhesive proteins known as **adhesins**, which enable pathogens to attach to host cells/tissues—a critical step in infection pathogenesis. Targeting these molecules offers potential strategies for preventing or treating infectious diseases but requires specificity due to their diversity among bacterial species. --- **Note:** The entry "Bacterial adhesion" is too broad/vague for use as a canonical molecular target; it should be replaced with specific names such as "FimH," "SiiE," etc.[1]

Other names

AdhesinBacterial adhesion proteinFimbrial adhesinPilus adhesinNon-fimbrial adhesin

Inhibition of bacterial attachment to host cells by blocking or disrupting the function of specific adhesins[1][3]