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Related Concept Videos

Gene Regulation in Microbial Communities: Quorum Sensing01:28

Gene Regulation in Microbial Communities: Quorum Sensing

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,...
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...
Yeast Signaling01:28

Yeast Signaling

Yeasts are single-celled organisms, but unlike bacteria, they are eukaryotes (cells with a nucleus). Cell signaling in yeast is similar to signaling in other eukaryotic cells. A ligand, such as a protein or a small molecule released from a yeast cell, attaches to a receptor on the cell surface. The binding stimulates second-messenger kinases to activate or inactivate transcription factors that further regulate gene expression. Many of the yeast intracellular signaling cascades have similar...
Gene Regulation During Sporulation01:17

Gene Regulation During Sporulation

Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
Regulation of Bacterial Virulence01:28

Regulation of Bacterial Virulence

Pathogenic bacteria employ a range of regulatory mechanisms to modulate the expression of virulence genes in response to environmental and host-derived signals. These mechanisms ensure that virulence factors are expressed only under favorable conditions, thereby optimizing infection and survival strategies.Mechanisms of Virulence RegulationKey regulatory strategies include:Two-Component Systems: These consist of a membrane-bound sensor kinase and a cytoplasmic response regulator. Environmental...
Fungal Phylum Basidiomycota01:26

Fungal Phylum Basidiomycota

Basidiomycota is a diverse phylum of fungi that includes ecologically significant decomposers such as white rot fungi, symbionts like mycorrhizal fungi, plant pathogens such as rusts and smuts, and edible species like Agaricus bisporus (the common button mushroom). These fungi play crucial roles in nutrient cycling, symbiotic relationships, and even human health. Their defining feature is the basidium, a microscopic club-shaped structure responsible for producing basidiospores.Fruiting Bodies...

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Related Experiment Video

Updated: Jun 27, 2026

A Hydroponic Co-cultivation System for Simultaneous and Systematic Analysis of Plant/Microbe Molecular Interactions and Signaling
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Published on: July 22, 2017

[Quorum sensing in fungal pathogenesis].

Tamaki Cho1, Toshihiro Aoyama

  • 1Section of Infection and Biology, Fukuoka Dental College.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|December 17, 2008
PubMed
Summary

Microbial quorum sensing, using autoinducers, regulates virulence and drug resistance. This study explores quorum sensing in Candida albicans and compares fungal and bacterial mechanisms.

Area of Science:

  • Microbiology
  • Molecular Biology
  • Mycology

Background:

  • Quorum sensing enables microbes to coordinate behaviors based on population density.
  • This cell-to-cell communication is crucial for virulence and drug resistance in bacteria.
  • Recent research extends the study of quorum sensing to pathogenic fungi like Candida albicans.

Purpose of the Study:

  • To review quorum sensing mechanisms in Candida albicans, focusing on the autoinducer farnesol.
  • To discuss quorum sensing in other fungal species.
  • To compare quorum sensing strategies between fungi and bacteria.

Main Methods:

  • Literature review and synthesis of existing research on fungal and bacterial quorum sensing.
  • Analysis of the role of farnesol as an autoinducer in Candida albicans.

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Use of Image Cytometry for Quantification of Pathogenic Fungi in Association with Host Cells

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Last Updated: Jun 27, 2026

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Published on: July 22, 2017

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  • Comparative analysis of molecular mechanisms.

    • Main Results:

    • Farnesol is identified as a key autoinducer in Candida albicans quorum sensing.
    • Quorum sensing pathways in fungi share similarities but also exhibit unique features compared to bacteria.
    • Differences in autoinducer molecules and signaling pathways are observed between fungal and bacterial systems.

    Conclusions:

    • Quorum sensing is a conserved but divergent mechanism across microbial kingdoms.
    • Understanding fungal quorum sensing, particularly in Candida albicans, offers insights into pathogenicity.
    • Comparative studies are essential for a comprehensive understanding of microbial communication.