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Gene Regulation in Microbial Communities: Quorum Sensing01:28

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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 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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Global regulatory systems in bacteria enable rapid and coordinated responses to environmental changes by integrating sensory inputs with gene expression, ensuring efficient adaptation to fluctuating conditions. Key global regulatory mechanisms include regulons, two-component systems, sigma factors, and secondary messengers.Regulons and Global RegulatorsA regulon is a collection of genes and operons controlled by a common global regulator. These regulators enable bacteria to prioritize resource...
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Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
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Anti-virulent Disruption of Pathogenic Biofilms using Engineered Quorum-quenching Lactonases
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Quorum sensing-mediated microbial interactions: Mechanisms, applications, challenges and perspectives.

Xiangyong Zeng1, Yunman Zou1, Jia Zheng2

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Quorum sensing, a cell-to-cell communication, drives microbial communities in diverse habitats. This review explores quorum sensing

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Area of Science:

  • Microbiology
  • Environmental Science
  • Biotechnology

Background:

  • Microbial communities are crucial for ecosystem functions.
  • Understanding community dynamics requires identifying driving forces.
  • Quorum sensing (QS) is a key microbial communication mechanism.

Purpose of the Study:

  • To systematically review microbial communities from a quorum sensing perspective.
  • To explore the role of QS in microbial interactions and community adaptation.
  • To summarize QS applications in various fields.

Main Methods:

  • Literature review and synthesis.
  • Analysis of quorum sensing mechanisms and functions.
  • Compilation of current applications and future prospects.

Main Results:

  • Quorum sensing regulates critical microbial processes like biofilm formation and public goods secretion.
  • QS influences microbial community adaptation to environmental changes.
  • Diverse applications of QS are identified in wastewater treatment, health, food, and synthetic biology.

Conclusions:

  • Quorum sensing is a fundamental driving force shaping microbial communities.
  • This review provides a theoretical basis for controlling microbial communities using QS.
  • Further research on QS offers potential for novel biotechnological solutions.