Small-secreted proteins as virulence factors in nematode-trapping fungi

Reinhard Fischer1, Natalia Requena1

  • 1Karlsruhe Institute of Technology (KIT), Department of Microbiology and Department of Botany, Karlsruhe, Germany.

Trends in Microbiology
|March 26, 2022
PubMed

Insights

Nematode-trapping fungi form adhesive nets to capture nematodes. Small secreted proteins play a key role in this fascinating predatory interaction, offering insights into fungal predation strategies.

Area of Science:

  • Mycology
  • Soil Biology
  • Biochemistry

Background:

  • Nematode-trapping fungi (NTF) are specialized soil microorganisms.
  • These fungi capture nematodes using sophisticated trapping mechanisms.

Purpose of the Study:

  • To highlight fascinating features of NTF.
  • To focus on the role of small secreted proteins in nematode predation.

Main Methods:

  • Review of existing literature on NTF.
  • Analysis of the function of small secreted proteins in predatory interactions.

Main Results:

  • NTF employ adhesive structures for nematode capture.
  • Small secreted proteins are crucial effectors in the predatory process.

Conclusions:

  • Small secreted proteins are key components of NTF predatory strategies.
  • Further research into these proteins can reveal novel biocontrol mechanisms.

Related Concept Videos

Overview of Secretory Vesicles01:33

Overview of Secretory Vesicles

Secretory vesicles, also known as dense core vesicles (DCVs), are membrane-bound vesicles that transport secretory proteins, such as hormones or neurotransmitters. Regulated secretory vesicles transport proteins from the trans-Golgi network to the exterior of the cell. Proteins present in regulated secretory vesicles are required to be rapidly exocytosed in large amounts upon a specific stimulus.
Various proteins regulate the aggregation of molecules inside the secretory vesicles. Chromogranins...
8.7K
Fusion of Secretory Vesicles with the Plasma Membrane01:26

Fusion of Secretory Vesicles with the Plasma Membrane

Proteins and neurotransmitters in secretory vesicles can be released from a cell upon vesicle docking, priming, and fusion with the plasma membrane. Vesicles are docked and primed in preparation for the quick exocytosis of their contents in response to a stimulus. The fusion process is mainly carried out by a SNAP Receptor or SNARE complex, consisting of synaptobrevin, syntaxin-1, and SNAP-25.
In 1993, Jim Rothman proposed that the antiparallel pairing of vesicular and transmembrane SNAREs, or...
12.4K
Gram-negative Bacterial Protein Secretion Systems01:17

Gram-negative Bacterial Protein Secretion Systems

Gram-negative bacteria utilize sophisticated protein secretion systems to transport proteins across their double-membrane envelope into the extracellular environment or host cells. Based on their mechanism of action, these systems are classified into one-step and two-step pathways.One-Step Secretion Systems (Types I, III, IV, and VI)One-step secretion systems bypass the periplasm entirely, forming a continuous channel that spans both the inner and outer membranes:Type I Secretion System (T1SS):...
188
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,...
113
Fungal Phylum Microsporidia01:28

Fungal Phylum Microsporidia

Microsporidia are a group of obligate intracellular fungi that were initially classified as protists but were later reclassified based on phylogenetic, molecular, and structural evidence linking them to the Chytridiomycota. These unicellular, non-motile organisms are highly specialized parasites that infect a wide range of animal hosts, including humans. They have evolved extensive genomic and metabolic reductions, making them highly dependent on their hosts for survival.Morphology and Genomic...
145