Scientific review reveals specialized structural and regulatory adaptations in Helicobacter pylori flagella, indicating critical roles in stomach colonization and mechanosensing.
Key Points
To review the unique architectural features, non-canonical gene regulation, and sensory functions of Helicobacter pylori flagella.
Literature synthesis of structural, genetic, and functional studies evaluating the Helicobacter pylori flagellar apparatus.
Comparative analysis of flagellar motor architecture, transcriptional checkpoints, and signaling mechanisms against canonical bacterial models.
Helicobacter pylori flagella exhibit distinct structural variations from canonical systems, including expanded motor dimensions, altered stator occupancy, diverse flagellins, and extra basal body components.
Flagellar gene expression lacks a master regulator and instead relies on a dual-sigma-factor hierarchy combined with distributed regulatory checkpoints.
The flagellar apparatus functions as a mechanosensor to guide the motile-to-sessile transition using type 4 pili homologs (PilO, PilN, and PilM) independently of cyclic di-GMP.