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Yeast Signaling

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...

What is Cell Signaling?

What is Cell Signaling?

Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate to respond to the environment.

Overview of Cell Signaling

Overview of Cell Signaling

Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate with the environment.
Cells respond to many types of information, often through receptor proteins positioned on the membrane. For example, skin cells respond to and transmit touch...

Contact-dependent Signaling

Contact-dependent Signaling

Contact-dependent signaling, as the name suggests, requires that communicating cells be in direct contact with each other. This is achieved either through receptor-ligand interactions or by specialized cytoplasmic channels that allow the flow of small molecules between cells. In animal cells, channels called gap junctions facilitate contact-dependent signaling in certain tissues, whereas, plasmodesmata perform a similar function in plants.
Gap Junctions
In animal cells, gap junctions are formed...

Cells Coordinate Growth and Proliferation

Cells Coordinate Growth and Proliferation

Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...

Bacterial Signaling

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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Related Experiment Video

Updated: Jan 4, 2026

Microscopy of Fission Yeast Sexual Lifecycle

Microscopy of Fission Yeast Sexual Lifecycle

Published on: March 9, 2016

Intraspecies cell-cell communication in yeast.

Yoko Yashiroda^1,2, Minoru Yoshida^1,3,4

¹Chemical Genomics Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.

FEMS Yeast Research

|November 6, 2019

Summary

Yeasts like Saccharomyces cerevisiae and Schizosaccharomyces pombe use chemical signals for cell-cell communication to adapt and survive. This review explores their molecular language, including pheromones and gases.

Keywords:

Saccharomyces cerevisiae Schizosaccharomyces pombe cell–cell communication mating pheromone oxylipin quorum sensing

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Last Updated: Jan 4, 2026

Microscopy of Fission Yeast Sexual Lifecycle

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Published on: March 9, 2016

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Manipulation and Analysis of Cell Cycle-Dependent Processes in Budding Yeast

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Determination of the Mating Efficiency of Haploids in Saccharomyces cerevisiae

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Area of Science:

Microbiology
Cell Biology
Biochemistry

Background:

Yeasts are unicellular organisms capable of independent life.
Yeasts exhibit complex intraspecies cell-cell communication for environmental adaptation.
This communication is vital for survival, nutrient acquisition, and sexual reproduction.

Purpose of the Study:

To review intraspecies cell-cell communication mechanisms in yeasts.
To summarize molecular mediators of yeast communication.
To focus on Saccharomyces cerevisiae and Schizosaccharomyces pombe.

Main Methods:

Literature review of scientific studies.
Analysis of molecular signaling pathways.
Comparison of communication strategies in two model yeast species.

Main Results:

Identified key signaling molecules: mating pheromones, volatile gases, aromatic alcohols, and oxylipins.
Detailed the 'language' of cell-cell communication in S. cerevisiae and S. pombe.
Highlighted the role of these molecules in promoting yeast survival and adaptation.

Conclusions:

Intraspecies cell-cell communication is a fundamental biological process in yeasts.
Molecular signals are crucial for yeast adaptation, reproduction, and survival.
Further research into yeast communication can reveal insights into microbial interactions.