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Updated: Sep 9, 2025

Author Spotlight: Advancing Therapeutics to Treat Vibriosis in Humans and Aquatic Organisms
Published on: May 31, 2024
Ribosomal Hibernation Factor Links Quorum-Sensing to Acid Resistance in EHEC
Yang Yang1,2, Xinyi Zhang3, Zixin Han1,2
1College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China.
Abstract:
The mechanism by which quorum sensing (QS) enhances stress resistance in enterohemorrhagic Escherichia coli (E. coli) O157:H7 remains unclear. We employed optimized exogenous QS signal N-acyl-homoserinelactones (AHL) (100 μM 3-oxo-C6-AHL, 2 h) in EHEC O157:H7 strain EDL933, which was validated with endogenous yenI-derived AHL, to investigate QS-mediated protection against acid stress. RNA-seq transcriptomics identified key upregulated genes (e.g., rmf). Functional validation using isogenic rmf knockout mutants generated via λ-Red demonstrated abolished stress resistance and pan-stress vulnerability. Mechanistic studies employing qRT-PCR and stress survival assays established Ribosomal Hibernation Factor (RMF) as a non-redundant executor in a SdiA-RMF-RpoS axis, which activates ribosomal dormancy and SOS response to enhance EHEC survival under diverse stresses. For the first time, we define ribosomal hibernation as the core adaptive strategy linking QS to pathogen resilience, providing crucial mechanistic insights for developing EHEC control measures against foodborne threats.
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