Helicobacter pylori urease and cell surface proteins

Helicobacter pylori urease and cell surface proteins represent a complex of therapeutic targets essential for the survival and pathogenesis of the H. pylori bacterium in the human stomach. The enzyme urease is a nickel-dependent metalloenzyme that catalyzes the hydrolysis of urea into ammonia and carbon dioxide, effectively neutralizing gastric acid to create a habitable microenvironment for the bacteria (Source: PubMed, PMID: 28244446). Adhesins, such as BabA and SabA, are membrane-anchored proteins that facilitate the attachment of the bacteria to the gastric epithelium, preventing clearance by peristalsis (Source: Nature Reviews Microbiology, 2006). These targets are notably affected by bismuth-based compounds, which exhibit a high affinity for thiol (sulfhydryl) groups present in various H. pylori enzymes and membrane proteins. By binding to these thiols, bismuth inhibits urease activity and disrupts the bacterial cell wall and respiratory chain, leading to bacterial death (Source: StatPearls, Bismuth Subsalicylate). This multi-target approach is a cornerstone of quadruple therapy for H. pylori eradication, particularly in the face of increasing resistance to conventional antibiotics like clarithromycin.

Other names

H. pylori ureaseH. pylori adhesinsThiol-containing H. pylori proteinsBismuth-binding proteins of H. pylori

Inhibition of urease enzymatic activity to prevent acid neutralization; disruption of bacterial cell wall integrity and adherence by binding to thiol-containing surface proteins.