Pathogen and toxin surface structures

Pathogen and toxin surface structures represent a broad category of molecular targets derived from infectious agents, including viruses, bacteria, and fungi, as well as the toxins they produce (IUPHAR/BPS Guide to Pharmacology). These structures, such as the SARS-CoV-2 spike protein or the Clostridium difficile toxin B, are essential for pathogen virulence, facilitating host cell attachment, entry, and immune evasion (Nature Reviews Microbiology, 2016). In drug development, these surfaces are targeted by vaccines and monoclonal antibodies like palivizumab and bezlotoxumab to neutralize infectivity or toxicity (NEJM, 2017). By binding to these exposed motifs, therapeutic agents can prevent the initiation of disease or enhance the host's ability to clear the pathogen (StatPearls, 2023). However, the high rate of antigenic variation in these structures poses a significant challenge, often leading to the emergence of drug-resistant strains (CDC, 2024). This target class is fundamental to the field of infectious disease and biodefense, requiring continuous monitoring of structural changes in the pathogen population.

Other names

Microbial surface antigensPathogen-associated molecular patternsPAMPsVirulence factorsExotoxinsSurface-exposed proteins

Neutralization of viral entry, inhibition of bacterial adhesion, neutralization of secreted toxins, and disruption of membrane integrity.