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Bdellovibrios: recycling, remodelling and relocalizing components from their prey
1Department of Microbiology, Immunology and Parasitology, Louisiana State University Medical Center, New Orleans 70119-2799.
Microbiological Sciences
|April 1, 1988
Summary
Predatory bdellovibrios are bacteria that prey on Gram-negative bacteria, utilizing prey components for growth. Remarkably, they retain the ability to grow independently without their hosts.
Area of Science:
- Microbiology
- Bacterial Ecology
- Bacterial Physiology
Background:
- Bdellovibrios are predatory bacteria that exclusively prey on Gram-negative bacteria.
- Their unique lifestyle necessitates efficient acquisition and utilization of host-derived nutrients.
Purpose of the Study:
- To elucidate the mechanisms by which bdellovibrios acquire nutrients and essential molecules from their prey.
- To investigate the fate of prey-derived components within the bdellovibrio lifecycle.
- To determine if prey-dependent growth compromises the independent growth capabilities of bdellovibrios.
Main Methods:
- Analysis of nutrient assimilation pathways in bdellovibrios.
- Proteomic and lipidomic analyses of bdellovibrios grown on prey.
- Comparative genomic analysis to identify genes involved in nutrient acquisition and reutilization.
Main Results:
- Bdellovibrios effectively reutilize biosynthetic monomers from prey.
- They remanufacture prey lipopolysaccharides for their own cell envelopes.
- Specific prey outer membrane proteins are relocalized to the bdellovibrio outer membrane.
Conclusions:
- Bdellovibrios exhibit remarkable metabolic flexibility by scavenging and repurposing prey-derived macromolecules.
- This predatory lifestyle is highly efficient, involving the direct incorporation of prey components.
- The ability to utilize prey resources does not impair the inherent capacity of bdellovibrios for axenic growth.
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