Research Topic: secondary metabolism

Rediscovery of viomellein as an antibacterial compound and identification of its biosynthetic gene cluster in dermatophytes

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Researchers discovered that dermatophytes, fungi that cause common skin infections like athlete’s foot, produce a red pigment called viomellein that kills bacteria. By studying the genes responsible for making this compound, scientists found that most dermatophytes produce it, which may help explain how these fungi establish infections on skin despite the presence of protective bacteria. This discovery opens new possibilities for understanding skin infections and potentially developing new treatments.

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Circadian clock is critical for fungal pathogenesis by regulating zinc starvation response and secondary metabolism

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Scientists discovered that Fusarium oxysporum, a fungus that causes plant diseases, uses an internal clock system to time its attacks on plants. The fungus is most dangerous at dawn, when it activates special genes to survive the plant’s defenses and produce toxins. By disrupting the fungus’s clock genes, researchers found they could make it harmless. This discovery could lead to new ways to protect crops by targeting the pathogen’s timing system rather than using traditional fungicides.

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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.

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Exploring the Mechanisms of Amino Acid and Bioactive Constituent Formation During Fruiting Body Development in Lyophyllum decastes by Metabolomic and Transcriptomic Analyses

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This study examined how Lyophyllum decastes mushrooms develop and build up their nutritious compounds. Researchers tracked amino acids and polysaccharides across four growth stages and identified which genes control their production. The mature mushrooms contained the highest levels of beneficial compounds, with amino acids reaching 45,107.39 μg/g and polysaccharides at 13.66 mg/g. These findings help explain why these mushrooms are nutritious and suggest ways to grow them better for maximum health benefits.

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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.

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Endophytic Alternaria alternata Culture-Derived Elicitor Promotes Growth and Antibacterial Activity in Kalanchoe laetivirens

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Researchers cultivated medicinal Kalanchoe plants in controlled laboratory conditions and exposed them to a powdered form of a beneficial fungus (Alternaria alternata). The plants treated with this fungal extract grew larger, developed more roots, and produced greater amounts of antibacterial compounds compared to untreated plants. The treated plants were especially effective at stopping the growth of two common disease-causing bacteria (E. coli and S. aureus). This approach could lead to more efficient production of plant-based medicines.

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Glucose-6-Phosphate Dehydrogenase Modulates Shiraia Hypocrellin A Biosynthesis Through ROS/NO Signaling in Response to Bamboo Polysaccharide Elicitation

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Researchers discovered that a specific enzyme called glucose-6-phosphate dehydrogenase (G6PDH) controls the production of hypocrellin A, a powerful therapeutic compound found in Shiraia fungi. When bamboo polysaccharides are added to fungal cultures, they trigger G6PDH activity, which then increases the production of signaling molecules that boost hypocrellin A biosynthesis. This finding could lead to better ways to produce this promising cancer-fighting photosensitizer at industrial scales using simple, cost-effective methods.

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