heterologous expression – Page 2

Biosynthesis of mushroom-derived type II ganoderic acids by engineered yeast

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Scientists successfully engineered baker’s yeast to produce ganoderic acids, potent anti-cancer compounds from medicinal mushrooms, at much higher levels than found in farmed mushrooms. By identifying key enzymes responsible for converting simpler compounds into active ganoderic acids, researchers created yeast strains that produce these valuable compounds 100-10,000 times more efficiently than traditional mushroom farming. This breakthrough could make these expensive medicinal compounds more accessible and affordable for medical research and potential drug development.

Bifunctional Sesquiterpene/Diterpene Synthase Agr2 from Cyclocybe aegerita Gives Rise to the Novel Diterpene Cyclocybene

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Scientists discovered that a fungal enzyme from the black poplar mushroom (Cyclocybe aegerita) can produce two different types of beneficial compounds called terpenes. Using a baker’s yeast relative as a host organism, they found that the enzyme makes both a known sesquiterpene and an entirely new diterpene compound they named cyclocybene. This discovery shows that fungi can be better factories for producing these valuable compounds than bacteria previously used, opening doors for developing new medicines, fragrances, and biofuels.

Unprecedented Mushroom Polyketide Synthases Produce the Universal Anthraquinone Precursor

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Scientists discovered that mushrooms in the Cortinarius genus use unique enzymes called polyketide synthases to produce chemical building blocks that become anthraquinone compounds. These mushroom enzymes work differently from similar enzymes found in molds and plants, showing that nature independently invented multiple ways to make the same important molecules. This finding reveals how different organisms evolved similar chemical-making abilities through completely different evolutionary paths, and suggests this principle applies to many other mushroom species as well.

Heterologous expression of the hypovirus CHV1-EP713 full-length cDNA in Botrytis cinerea: transformation with Agrobacterium tumefaciens and evaluation of changes in the fungal phenotype

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Researchers successfully introduced a virus from chestnut blight fungus into gray mold fungus to reduce its ability to cause disease. The transformed fungus grew slower, produced fewer spores, and caused less damage to plants. This discovery suggests viruses could be used as natural biological control agents to protect crops from fungal diseases.

New bioactive secondary metabolites from fungi: 2024

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Scientists discovered 907 new compounds from fungi in 2024, with most being terpenoids and polyketides that show promise as medicines. These fungal compounds demonstrate strong activity against bacteria, fungi, and inflammation, with some showing potential against cancer and diabetes. The research uses advanced techniques like genome mining and metabolomics to find these compounds more efficiently. This accelerating discovery rate suggests fungi could be a major source for developing new drugs to treat various diseases.

Identification of a Biosynthetic Gene Cluster for the Production of the Blue-Green Pigment Xylindein by the Fungus Chlorociboria aeruginascens

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Scientists discovered the genetic instructions that allow certain fungi to produce xylindein, a beautiful blue-green pigment found in stained wood. By analyzing fungal genomes and studying gene activity, they identified nine genes working together to create this valuable compound, which has uses in textiles and electronics. While attempts to produce xylindein in laboratory yeasts were unsuccessful, their work successfully produced a related pigment and opens new pathways for understanding xylindein production.

Dissimilar Reactions and Enzymes for Psilocybin Biosynthesis in Inocybe and Psilocybe Mushrooms

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This study reveals that two different types of magic mushrooms—Psilocybe and Inocybe—make psilocybin (the active compound in magic mushrooms) using completely different enzymes and chemical pathways. Despite both mushroom types producing the same final product, they evolved their recipes independently, like two chefs arriving at the same dish through entirely different cooking methods. The research shows how evolution can solve the same problem in multiple ways and provides new enzymes that could be useful for producing psilocybin as a potential depression treatment.

Engineered biosynthesis and characterization of disaccharide-pimaricin

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Scientists engineered a bacterium to produce a modified antibiotic called disaccharide-pimaricin that fights fungal infections with much better safety. This new compound dissolves better in water (107 times more soluble) and is much less toxic to human blood cells (12.6 times safer) compared to regular pimaricin, while still maintaining antifungal effectiveness. Through optimized fermentation processes, they achieved high production yields of 138 mg/L, making this a promising candidate for safer antifungal treatments.

The palmitoyl-CoA ligase Fum16 is part of a Fusarium verticillioides fumonisin subcluster involved in self-protection

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This research reveals how corn fungi protect themselves from their own toxic products by employing specialized defense enzymes. Scientists discovered that five genes work together in a protective cluster, with some enzymes strengthening the fungal cell’s natural defenses while others actively break down the toxin. This discovery helps explain how dangerous fungi survive and could lead to better strategies for preventing mycotoxin contamination in crops and developing disease-resistant plants.

Relative contribution of three transporters to D-xylose uptake in Aspergillus niger

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Researchers studied how three different protein transporters help the fungus Aspergillus niger absorb xylose, a type of sugar found in plant waste. They found that two of these transporters (XltA and XltD) were equally important, while the third (XltB) played a minor role. Interestingly, the fungus could still absorb xylose even without these three transporters, suggesting other backup transporters exist. This finding shows that predicting which transporters are important based on laboratory tests in yeast may not accurately reflect how they work in the original fungus.

Research Keyword: heterologous expression