Helicobacter pylori cell envelope and associated proteins (H. pylori cell envelope)

The Helicobacter pylori cell envelope is a complex, multi-layered structure essential for the bacterium's survival in the harsh, acidic environment of the human stomach. It consists of an inner cytoplasmic membrane, a thin peptidoglycan layer, and an asymmetric outer membrane containing lipopolysaccharides and a diverse array of outer membrane proteins (OMPs). These OMPs, including adhesins like BabA and SabA, are critical for the bacterium's ability to colonize the gastric mucosa by binding to host cell receptors [1][2]. The envelope also serves as a scaffold for the Type IV secretion system, which translocates virulence factors such as CagA directly into host epithelial cells, driving inflammation and oncogenesis [3]. From a therapeutic perspective, the cell envelope is the primary target for beta-lactam antibiotics like amoxicillin, which inhibit the penicillin-binding proteins (PBPs) involved in peptidoglycan synthesis [4]. Additionally, bismuth-based compounds exert their antimicrobial effects by accumulating within and disrupting the integrity of the bacterial cell wall and membrane [5]. However, the envelope also acts as a formidable barrier, and modifications to its components, such as porin mutations or LPS alterations, contribute significantly to the development of antibiotic resistance [6]. Understanding the structural biology of this envelope is paramount for the design of next-generation therapies targeting H. pylori's unique survival mechanisms.

Other names

H. pylori cell wallH. pylori outer membraneH. pylori surface proteinsH. pylori envelope proteome

Inhibition of peptidoglycan synthesis by binding to penicillin-binding proteins (PBPs) and disruption of cell membrane integrity.