Helicobacter pylori urease and surface antigens mediating gastric adhesion

This target complex comprises the primary virulence factors of Helicobacter pylori, a bacterium responsible for most cases of peptic ulcers and gastric cancer. The urease component is a nickel-dependent metalloenzyme that hydrolyzes urea into ammonia and carbon dioxide, neutralizing gastric acid to create a habitable microenvironment for the pathogen. The surface antigens, primarily adhesins such as BabA (blood group antigen-binding adhesin) and SabA (sialic acid-binding adhesin), facilitate the specific attachment of the bacteria to the gastric epithelium, ensuring persistent colonization. Together, these factors allow H. pylori to evade host defenses and induce chronic inflammation. Therapeutic interventions targeting this complex include urease inhibitors like acetohydroxamic acid and experimental vaccines designed to block bacterial adhesion and survival.

Other names

H. pylori ureaseH. pylori adhesinsUrease (UreA/UreB)Blood group antigen-binding adhesin (BabA)Sialic acid-binding adhesin (SabA)Outer membrane protein (OMP)H. pylori colonization factors

Competitive inhibition of the urease active site; Inhibition of urease maturation via nickel-binding; Competitive blocking of adhesin-receptor interactions; Co-aggregation and removal of bacteria from the gastric mucosa