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Related Experiment Video

Updated: May 22, 2026

Establishment of a High-throughput Setup for Screening Small Molecules That Modulate c-di-GMP Signaling in Pseudomonas aeruginosa

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[Cyclic digene system as a control element of a bacterial biosensor].

E É Stupak, I V Stupak

Prikladnaia Biokhimiia I Mikrobiologiia

|May 10, 2012

Summary

This study shows that genetically engineered Escherichia coli can act as a biosensor. It detects DNA-damaging compounds and passes this trait to offspring, aiding environmental monitoring.

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Area of Science:

Microbiology
Environmental Science
Biotechnology

Background:

Genotoxic compounds pose risks to environmental and human health.
Developing sensitive and reliable methods for detecting genotoxicants is crucial.
Bacterial biosensors offer a promising approach for environmental monitoring.

Purpose of the Study:

To evaluate the potential of a genetically modified Escherichia coli strain as a biosensor for genotoxic compounds.
To investigate the inheritance of the genotoxic response in subsequent bacterial generations.

Main Methods:

Utilized Escherichia coli JC1 58(pCIA12/pG FK5) strain engineered with a cyclic digene system.
The system featured negative feedback on the pCIA12 plasmid, responding to DNA damage.
Reporter genes (GFP and beta-galactosidase) were employed to quantify the response.

Main Results:

The engineered E. coli strain exhibited a measurable change in reporter gene synthesis upon exposure to DNA-damaging agents.
The induced phenotype, indicating genotoxicity, was heritable across generations.
Inheritance occurred when the concentration of genotoxic compounds exceeded a specific threshold level.

Conclusions:

The tested Escherichia coli strain demonstrates potential as a bacterial biosensor for detecting genotoxicants in environmental samples.
This biosensor can effectively assess the impact of short-term exposure to toxic substances.
The heritable nature of the response enhances its utility for long-term environmental monitoring strategies.