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Related Concept Videos

Bacterial Signaling01:30

Bacterial Signaling

Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
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Microbial biosensors are analytical devices that utilize living microbes to detect specific substances through measurable signals. These devices consist of two main components: biosensing organisms and signal-transducing elements. Biosensing organisms, such as Escherichia coli or Saccharomyces cerevisiae, are typically housed in multiwell plates connected to transducers, enabling rapid, real-time detection of target analytes.Signal Generation MechanismWhen a target analyte—such as...
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Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
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Bacterial Detection & Identification Using Electrochemical Sensors
09:30

Bacterial Detection & Identification Using Electrochemical Sensors

Published on: April 23, 2013

Engineering bacterial signals and sensors.

Howard Salis, Alvin Tamsir, Christopher Voigt

    Contributions to Microbiology
    |June 5, 2009
    PubMed
    Summary
    This summary is machine-generated.

    This guide explains how to engineer bacteria with synthetic gene networks to sense environmental signals and perform programmed functions, creating living computers for biotechnology. It details strategies and provides resources for building novel bacterial sensor systems.

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    Area of Science:

    • Synthetic biology
    • Genetic engineering
    • Biotechnology

    Background:

    • Synthetic biology aims to engineer bacteria as self-replicating computers.
    • Bacteria can be programmed to respond to environmental cues using genetic circuits.
    • Current applications leverage natural genetic parts to create novel gene networks.

    Purpose of the Study:

    • To provide a guide for engineering bacterial sensor systems.
    • To describe strategies for creating synthetic gene networks with specific responses.
    • To offer specifications for two-component and quorum-sensing systems for engineering.

    Main Methods:

    • Recombining natural genetic parts from various organisms.
    • Developing strategies for engineering novel bacterial sensor systems.
    • Characterizing two-component and quorum-sensing systems for application.

    Main Results:

    • Strategies for engineering bacterial sensor systems are presented.
    • Synthetic gene networks capable of sensing stimuli and generating responses are described.
    • Specification sheets for key genetic systems are provided.

    Conclusions:

    • Engineered bacteria can function as living computers by integrating synthetic gene networks.
    • The methods and resources facilitate the design of bacteria for specific environmental interactions.
    • This work supports the advancement of biotechnological applications through synthetic biology.