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Iso-propyl stilbene: a life cycle signal?
Alexia Hapeshi1, Jonatan Mimon Benarroch1, David James Clarke2
1Microbiology and Infection Unit, Division of Biomedical Sciences, Warwick Medical School, University of Warwick, Coventry, UK.
Microbiology (Reading, England)
|March 19, 2019
Summary
Photorhabdus bacteria respond to 3,5-dihydroxy-4-isopropyl-trans-stilbene (IPS) by altering gene expression and reducing bioluminescence. This suggests IPS regulates bacterial behavior and symbiosis.
Area of Science:
- Microbiology
- Bacterial Physiology
- Symbiotic Interactions
Background:
- Photorhabdus bacteria are Gram-negative, insect pathogens in symbiosis with Heterorhabditis nematodes.
- They produce 3,5-dihydroxy-4-isopropyl-trans-stilbene (IPS), a molecule with diverse bioactivities.
Purpose of the Study:
- To investigate Photorhabdus bacterial responses to exogenous IPS at physiological concentrations.
- To understand the role of IPS in bacterial physiology and symbiosis.
Main Methods:
- Exposure of Photorhabdus bacteria to exogenous IPS.
- Phenotypic analysis including bioluminescence and pigment production measurements.
- Transcriptomic analysis to assess gene expression changes.
Main Results:
- IPS addition caused a measurable phenotypic response in Photorhabdus.
- Observed decreased bioluminescence and pigment production.
- Transcriptomic data revealed reduced expression of genes involved in translation and oxidative phosphorylation.
Conclusions:
- IPS influences Photorhabdus bacterial phenotypes, including bioluminescence and pigment production.
- IPS plays a role in bacterial quorum sensing, antibiotic resistance, and symbiotic development.
- These findings highlight IPS as a key molecule in Photorhabdus biology and nematode symbiosis.
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