Helicobacter pylori surface proteins, cell wall and membranes (H. pylori surface/cell wall components)

Helicobacter pylori surface proteins, cell wall, and membranes represent the primary interface between the pathogen and the human gastric mucosa. The cell wall is composed of a thin peptidoglycan layer and an outer membrane containing unique lipopolysaccharides (LPS) and a large family of outer membrane proteins (OMPs), such as the blood group antigen-binding adhesin (BabA) and sialic acid-binding adhesin (SabA) (PubMed: 11703921). These structures are essential for the bacterium's ability to survive the acidic environment of the stomach, adhere to epithelial cells, and evade host immune responses (StatPearls: NBK544250). Therapeutically, the cell wall is the target of beta-lactam antibiotics like amoxicillin, which inhibit peptidoglycan synthesis, while bismuth salts act by disrupting the bacterial membrane and cell wall integrity (NIH: PMC4991180). These surface components are also the focus of vaccine development efforts, as they contain highly immunogenic epitopes (PubMed: 30204586). However, the high degree of genetic diversity and the ability of H. pylori to modify its surface components contribute to persistent infection and the challenge of antibiotic resistance (UniProt: UP000000429).

Other names

H. pylori cell envelopeH. pylori outer membrane proteinsH. pylori cell wallH. pylori surface antigensH. pylori outer membrane

Inhibition of peptidoglycan synthesis by binding to penicillin-binding proteins (PBPs); disruption of bacterial cell membrane integrity and cell wall structure; blocking of adhesin-mediated attachment to host gastric epithelial cells.