Escherichia coli type 1 fimbriae FimH adhesin (FimH)

Escherichia coli type 1 fimbriae FimH adhesin is a mannose-specific lectin located at the distal tip of type 1 pili, primarily found in uropathogenic Escherichia coli (UPEC) and adherent-invasive Escherichia coli (AIEC) [UniProt: P08191]. Its primary biological function is to mediate the attachment of bacteria to mannosylated glycoproteins, such as uroplakin Ia, on the surface of host epithelial cells [PubMed: 11133751]. This adhesion is characterized by a unique catch-bond mechanism, where mechanical shear stress increases the binding affinity, allowing the bacteria to remain attached to the bladder wall during urination [PubMed: 18443295]. In the context of disease, FimH is a critical virulence factor for urinary tract infections (UTIs) and has been implicated in the pathogenesis of Crohn's disease by facilitating bacterial colonization of the intestinal mucosa [PubMed: 21903735]. Therapeutic targeting of FimH involves the use of mannoside-based small molecules that competitively inhibit the lectin domain, thereby preventing bacterial colonization and biofilm formation [PubMed: 28838154]. These anti-adhesion therapies offer a promising alternative to traditional antibiotics, as they aim to reduce infection without exerting strong selective pressure for antimicrobial resistance [PubMed: 31584314].

Other names

Type 1 pilus tip adhesinMannose-binding lectin FimHFimH proteinAdhesin FimH

Competitive inhibition of the FimH lectin domain to prevent bacterial attachment to mannosylated host receptors.