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Gene Regulation in Microbial Communities: Quorum Sensing

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 Signaling

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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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Mitotic cell division results in daughter cells that exactly resemble the parent cell. However, errors in the DNA replication or distribution of genetic material may lead to genetic mutations that may be passed down to every new cell formed from the resulting abnormal cell. Propagation of such mutant cells is restricted through checkpoint mechanisms present at different stages of the cell cycle. These checkpoints involve regulator molecules that either promote or demote cell cycle events.

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To consistently produce healthy cells, the cell cycle—the process that generates daughter cells—must be precisely regulated.

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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...

Autocrine Signaling

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Autocrine signaling is one of the many signaling mechanisms that function inside multicellular organisms to carry out intercellular communication. In this type of signaling mechanism, the same cell that secretes an extracellular signaling molecule also expresses the receptors to bind and respond to that signaling molecule.
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Under normal physiological conditions, autocrine signaling is essential for maintaining homeostasis. This process is well characterized in...

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Corrigendum: Why Quorum Sensing Controls Private Goods.

Martin Schuster¹, D Joseph Sexton¹, Burkhard A Hense²

¹Department of Microbiology, Oregon State UniversityCorvallis, OR, United States.

Frontiers in Microbiology

|July 27, 2017

Summary

This summary is machine-generated.

This study corrects a previous publication. The correction pertains to an article published in volume 8, with PMID 28579979.

Keywords:

Pseudomonas aeruginosa cheating cooperation evolutionary stability nucleoside hydrolase private good public good quorum sensing

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Area of Science:

Correction of scientific literature

Context:

Correction of a previously published article.
Article details: Volume 8, Page 885.
Associated PMID: 28579979.

Purpose:

To ensure accuracy in the scientific record.
To provide the correct information to readers.
To maintain the integrity of published research.

Summary:

A specific correction has been issued for an article.
The correction addresses content on page 885 of volume 8.
The article is identified by its PMID: 28579979.

Impact:

Ensures readers have access to the accurate version of the research.
Upholds the standards of scientific publishing.
Facilitates reliable citation and referencing.