Helicobacter pylori cell wall and outer membrane (H. pylori cell wall/OM)

The Helicobacter pylori cell wall and outer membrane constitute a complex multi-layered envelope that protects the bacterium from the harsh, acidic environment of the human stomach. This structure is composed of an inner cytoplasmic membrane, a thin peptidoglycan layer, and an asymmetric outer membrane containing unique lipopolysaccharides (LPS) and a diverse repertoire of outer membrane proteins (OMPs) such as BabA and SabA (NIH, MDPI). These components are essential for maintaining structural integrity, facilitating adhesion to the gastric epithelium, and mediating the transport of nutrients and virulence factors (NIH, Wikipedia). In the context of disease, the cell wall and its associated proteins play a critical role in the pathogenesis of chronic gastritis, peptic ulcers, and gastric cancer by enabling persistent colonization and triggering inflammatory responses (NIH, DNTB). Therapeutically, the cell wall is a primary target for beta-lactam antibiotics such as amoxicillin, which inhibit peptidoglycan synthesis by binding to penicillin-binding proteins (PBPs), leading to bacterial lysis (NIH, Dr. Oracle). Additionally, bismuth-based compounds and certain novel agents exert antimicrobial effects by disrupting the cell wall and cytoplasmic membrane (ResearchGate, InTechOpen). Understanding the molecular architecture of this envelope, including the role of proteins like CcmA in maintaining the helical shape, is vital for overcoming increasing antibiotic resistance and developing novel vaccines or targeted therapies (eLife, Pasteur Institute).

Other names

Helicobacter pylori cell envelopeHelicobacter pylori outer membraneHelicobacter pylori peptidoglycan layer

Inhibition of peptidoglycan synthesis via binding to penicillin-binding proteins (PBPs); disruption of bacterial membrane integrity; inhibition of cell wall assembly complexes such as the PBP2:MreC elongasome.