Helicobacter pylori surface adhesins and enzymes

Helicobacter pylori surface adhesins and enzymes represent a diverse array of virulence factors essential for the bacterium's persistence in the human gastric niche. The enzyme urease is the most critical factor for initial colonization, as it generates a protective ammonia cloud to neutralize gastric acid (StatPearls: Helicobacter Pylori). Adhesion to the gastric mucosa is mediated by a family of outer membrane proteins, most notably the Blood group antigen-binding adhesin (BabA) and Sialic acid-binding adhesin (SabA), which recognize Lewis antigens on host epithelial cells (UniProt: P0ED07). Beyond attachment, enzymes such as High-temperature requirement A (HtrA) and toxins like Vacuolating cytotoxin A (VacA) actively degrade the epithelial barrier and modulate host immune responses (PubMed: 21818306). These surface-exposed molecules are the primary targets for current eradication protocols, which utilize a combination of antibiotics and bismuth salts to disrupt bacterial integrity and enzymatic function. Furthermore, these proteins are being extensively researched as candidates for recombinant vaccines aimed at preventing H. pylori-associated gastric adenocarcinoma and peptic ulcer disease (NIH: Helicobacter pylori and Cancer).

Other names

Helicobacter pylori virulence factorsH. pylori surface proteinsGastric colonization factorsHelicobacter pylori adhesins

Inhibition of bacterial cell wall synthesis, protein synthesis, and DNA synthesis; competitive inhibition of urease activity; and disruption of bacterial adherence to gastric mucosa.