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Highly conserved, but highly specific: Somatic cell-cell fusion in filamentous fungi

André Fleißner1, Anne G Oostlander1, Lucas Well1

  • 1Institut für Genetik, Technische Universität Braunschweig, Braunschweig, Germany.

Current Opinion in Cell Biology
|November 8, 2022
PubMed

Insights

Fungal cells communicate using a unique signaling system that allows them to recognize self from non-self, even across species. This mechanism is crucial for colony development and social behavior in fungi.

Area of Science:

  • Mycology
  • Cell Biology
  • Genetics

Background:

  • Ascomycete fungal colonies develop through cell-cell fusion.
  • Fungal communication involves a unique, alternating signal sending and receiving mechanism.
  • This process is mediated by an excitable signaling network.

Purpose of the Study:

  • To investigate the molecular basis of cell-cell communication in fungi.
  • To explore the conservation and interspecies interactions of fungal signaling.
  • To understand the allorecognition mechanisms preventing fusion between unlike individuals.

Main Methods:

  • Utilized the model fungus Neurospora crassa.
  • Investigated molecular mechanisms of fungal communication.
  • Examined allorecognition pathways.

Main Results:

  • The fungal signaling system is conserved across ascomycetes and mediates interspecies interactions.
  • Allorecognition mechanisms prevent fusion of genetically dissimilar individuals.
  • Signal specificity is determined by downstream checkpoints, not just signals and receptors.

Conclusions:

  • Fungal social behavior relies on conserved, yet specific, cell-cell communication.
  • Specificity in fungal interactions is regulated at downstream checkpoints.
  • The ecological role of these mechanisms in natural environments requires further investigation.

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