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Updated: Jan 17, 2026

Live-Cell Imaging of the Life Cycle of Bacterial Predator Bdellovibrio bacteriovorus using Time-Lapse Fluorescence Microscopy
Published on: May 8, 2020
Two-step localization driven by peptidoglycan hydrolase in interbacterial predation.
Huihui Song1, Yuxiang Zhu1, Zhelin Qu2,3
1MOE Key Laboratory of Evolution and Marine Biodiversity, College of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao, Shandong 266003, China.
Predatory bacteria use a novel two-step strategy, phPLUS, to find and consume prey. This involves a peptidoglycan hydrolase (LssL) that releases signaling molecules, guiding bacterial localization and enhancing predation.
Area of Science:
- Microbiology
- Ecology
- Biochemistry
Background:
- Bacterial predation mechanisms are vital for understanding microbial interactions but remain poorly understood.
- Predator localization of prey via specific cues is known, but the underlying mechanisms are unclear.
Purpose of the Study:
- To investigate the dynamic interaction between the predatory bacterium Lysobacter enzymogenes and its prey.
- To elucidate the novel predation strategy mediated by peptidoglycan hydrolase LssL.
Main Methods:
- Genetic manipulation
- Transcriptomic analysis
- Biochemical assays
- Live-cell tracking microscopy at the single-cell level
Main Results:
- A novel predation strategy, peptidoglycan hydrolase-driven Prey Localization and Utilization System (phPLUS), was identified.
- LssL initiates prey localization by hydrolyzing prey, releasing glycine as a signaling cue for directional movement.
- Prey signals upregulate LssL expression, synergizing with the type VI secretion system for prey killing.
Conclusions:
- A new two-step prey localization strategy in bacterial predation was revealed.
- A previously unrecognized predation process and signal regulation mechanism were highlighted.
- The study expands understanding of predator-prey interactions and microbial ecological dynamics.
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