secondary metabolism – Page 6

The putative forkhead transcription factor FhpA is necessary for development, aflatoxin production, and stress response in Aspergillus flavus

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Aspergillus flavus is a fungus that contaminates crops and produces aflatoxins, dangerous toxins that can harm human health and reduce crop value. Scientists studied a specific regulatory gene called fhpA that controls how this fungus develops and produces aflatoxins. They found that removing this gene causes the fungus to produce more aflatoxins and more spores but lose the ability to form protective sclerotial structures, suggesting this gene could be a target for controlling aflatoxin contamination in foods.

Citric acid impairs type B trichothecene biosynthesis of Fusarium graminearum but enhances its growth and pigment biosynthesis: transcriptomic and proteomic analyses

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Researchers discovered that citric acid, a natural acid found in plant roots and commonly used in agriculture, can reduce the production of dangerous mycotoxins called trichothecenes that contaminate wheat and corn crops. While citric acid surprisingly boosts the fungus’s growth and changes its color, it simultaneously shuts down the genes responsible for producing these toxic compounds. This discovery could help farmers use citric acid more strategically to prevent Fusarium head blight, a devastating crop disease, though care must be taken since it also promotes fungal growth.

A Chromosome-Scale Genome of Trametes versicolor and Transcriptome-Based Screening for Light-Induced Genes That Promote Triterpene Biosynthesis

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Scientists created a detailed map of the Trametes versicolor mushroom’s genetic code using advanced sequencing technologies. This medicinal mushroom is known for cancer-fighting and immune-boosting properties. The research discovered that light exposure increases the production of beneficial compounds called triterpenes, which may explain how this mushroom’s medicinal qualities work and could help scientists grow it more effectively.

Screening of Basidiomycete Strains Capable of Synthesizing Antibacterial and Antifungal Metabolites

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Researchers tested 18 different types of wood-decay fungi (basidiomycetes) to see if they could produce natural antibiotics and antifungal compounds. They found that 16 of the 18 strains successfully produced antimicrobial substances. Five strains were particularly promising, showing strong activity against dangerous bacteria including antibiotic-resistant strains. The study identified specific chemical compounds from these fungi that could potentially be developed into new medicines.

Tracing the Origin and Evolution of the Fungal Mycophenolic Acid Biosynthesis Pathway

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Scientists studied how different fungal species produce mycophenolic acid, a drug used to prevent transplant rejection in millions of patients worldwide. By analyzing the genomes of many fungal species, they found that only a few fungi can make this important drug, and they discovered that these fungi have different ways of protecting themselves from being poisoned by their own medicine. This research helps us understand how fungi evolve to produce valuable medicines and could lead to better ways to produce immunosuppressants.

Functional diversification of epidithiodiketopiperazine methylation and oxidation towards pathogenic fungi

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This research shows that Trichoderma hypoxylon, a beneficial fungus used in agriculture, produces different versions of antifungal compounds called epidithiodiketopiperazines (ETPs) to fight various harmful fungi. By deleting genes responsible for modifying these compounds, scientists found that different modifications work better against different pathogens—some modifications are more effective against mold fungi while others work better against grain pathogens. This demonstrates that the fungus uses chemical diversity as a strategy to protect crops from multiple threats.

Fungal alkaloids mediate defense against bruchid beetles in field populations of an arborescent ipomoea

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Certain morning glory trees form partnerships with special fungi that produce protective chemicals called alkaloids. These chemicals are made by the fungi and travel through the plant to the seeds, where they protect them from seed-eating beetles. Trees with more effective fungal partners produce higher levels of these protective chemicals and suffer less damage from the beetles, demonstrating a remarkable example of how plants and fungi work together to survive in nature.

Newly Discovered Fungal Species from Black Pepper Marketed in Brazil: Penicillium pipericola sp. nov. and Syncephalastrum brasiliense sp. nov.

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Researchers in Brazil discovered two new fungal species found on commercially sold black pepper. While one species can produce a toxic compound that concerns food safety experts, both species also produce molecules with potential medical benefits, including compounds that may help fight cancer and neurological diseases. This discovery highlights the importance of monitoring fungi in food products while also revealing unexpected pharmaceutical potential hidden in everyday spices.

Comparative gene expression analysis in closely related dermatophytes reveals secondary metabolism as a candidate driver of virulence

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A strain of fungal skin pathogen (Trichophyton benhamiae var. luteum) is spreading rapidly among guinea pigs and people in Europe, but scientists didn’t understand why it was more contagious than closely related strains. Researchers compared gene activity in four related fungal species and found that the epidemic strain produces higher levels of toxic compounds called secondary metabolites. These compounds help the fungus escape the body’s immune system and cause infection more effectively than in less dangerous relatives.

Microbe Profile: Streptomyces formicae KY5: an ANT-ibiotic factory

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Scientists discovered a special bacterium called Streptomyces formicae living in ant nests in Africa that produces powerful antibiotics effective against dangerous drug-resistant bacteria and fungi. This bacterium has the genetic potential to make at least 45 different antimicrobial compounds, though most are not currently being produced under standard laboratory conditions. Using advanced gene-editing techniques like CRISPR, researchers are working to activate these hidden pathways to discover new medicines. This research demonstrates how exploring bacteria in nature can lead to finding new antibiotics to treat serious infections.

Research Keyword: secondary metabolism