Cytoplasmic Lipases—A Novel Class of Fungal Defense Proteins Against Nematodes
- Author: mycolabadmin
- 2021-07-01
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Summary
This research discovered that certain mushrooms produce defensive proteins called lipases that can protect them from being eaten by tiny worms called nematodes. These proteins work by breaking down fats that are essential for the nematodes’ survival. The findings have important real-world implications:
• Could lead to new environmentally-friendly ways to protect crops from harmful nematode parasites
• May help develop new treatments for parasitic worm infections in humans and livestock
• Demonstrates how studying natural defense mechanisms can inspire new therapeutic approaches
• Could reduce reliance on chemical pesticides in agriculture
• Provides insights into how organisms naturally defend themselves against predators
Background
Fungi are an attractive food source for predators such as fungivorous nematodes. Several fungal defense proteins and their protective mechanisms against nematodes have been described. Many of these proteins are lectins which are stored in the cytoplasm of the fungal cells and bind to specific glycan epitopes in the digestive tract of the nematode upon ingestion.
Objective
To study and characterize two novel nematotoxic proteins with lipase domains (CLT1 and CLT2) from the model mushroom Coprinopsis cinerea that are induced in response to nematode predation.
Results
Both CLT1 and CLT2 showed strong upregulation when C. cinerea was challenged with nematodes. The proteins demonstrated nematotoxicity when expressed in E. coli and fed to bacterivorous nematodes. Mutation of predicted catalytic residues significantly reduced both lipase activity and nematotoxicity, indicating that the lipase activity is required for toxicity. The proteins showed different activity spectra against various nematode species.
Conclusion
Cytoplasmic lipases constitute a novel class of fungal defense proteins against predatory nematodes. The findings improve understanding of fungal defense mechanisms and may have applications in controlling parasitic nematodes in agriculture and medicine.
- Published in:Frontiers in Fungal Biology,
- Study Type:Laboratory Research,
- Source: 10.3389/ffunb.2021.696972