Fusobacterium nucleatum membrane porin FomA (FomA)

Fusobacterium nucleatum membrane porin FomA is the major outer membrane protein of the Gram-negative anaerobic bacterium Fusobacterium nucleatum, which is a key component of the oral microbiome and a significant oncomicrobe in colorectal cancer [1, 2, 6]. FomA functions as a non-specific porin for the transport of small molecules and serves as a critical adhesin that mediates bacterial co-aggregation with other oral pathogens and host proteins, such as salivary statherin [11, 13, 18]. This co-aggregation is essential for the formation of dental plaque biofilms, contributing to the pathogenesis of periodontal diseases and halitosis [1, 3, 14]. Beyond its structural and adhesive roles, FomA acts as a potent Toll-like receptor 2 (TLR2) agonist, inducing pro-inflammatory cytokine production and modulating the host immune response [10, 19, 20]. In the context of colorectal cancer, FomA is a primary target for selective therapeutic strategies, including bioengineered probiotics and guided antimicrobial peptides designed to reduce F. nucleatum abundance without disrupting the broader gut microbiota [8, 16]. Experimental FomA-based vaccines have also demonstrated the ability to induce neutralizing antibodies that block bacterial colonization and mitigate infection-associated inflammation [1, 3, 10].

Other names

FomAMajor outer membrane proteinMOMP40-kDa outer membrane protein40-kDa CEPorin FomA

Inhibition of bacterial co-aggregation and biofilm formation; selective antimicrobial targeting via guide peptides; induction of neutralizing antibodies through vaccination; TLR2-mediated immune activation.