polyketide synthesis

Aspergillus terreus sectorization: a morphological phenomenon shedding light on amphotericin B resistance mechanism

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This study investigated why some strains of the fungus Aspergillus terreus are resistant to amphotericin B, an important antifungal medicine. Researchers compared a resistant strain with a mutated version that became susceptible to the drug. They found that certain genes called P-type ATPases are more active in resistant strains and may help the fungus pump ions and alter its cell membrane to survive the drug. Additionally, mutations in genes responsible for producing secondary metabolites were linked to the visible changes seen when fungal cultures degenerate.

Genomic characterization and fermentation study of the endophyte Stemphylium sp. (Aa22), a producer of bioactive alkyl-resorcinols

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Scientists have studied a beneficial fungus called Stemphylium sp. Aa22 that lives inside wormwood plants and produces natural insect-repelling compounds called alkyl-resorcinols. By reading the complete genetic code of this fungus, researchers identified the gene responsible for making these compounds and found that growing the fungus in liquid culture produces more of the desired compounds than growing it on solid rice. This research could lead to developing natural, environmentally-friendly pesticides to protect crops from aphids and other pests.

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.

Genome-Mining Based Discovery of Pyrrolomycin K and L from the Termite-Associated Micromonospora sp. RB23

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Researchers discovered two new antimicrobial compounds called pyrrolomycins from a bacterium found in termite guts using genome analysis and advanced chemistry techniques. These compounds are modified versions of known antimicrobial molecules, featuring halogenated structures. Interestingly, the bacteria appears to protect itself from its own toxic compounds through chemical modifications, a strategy that researchers believe could inform the design of new antibiotics to combat drug-resistant bacteria.

Research Topic: polyketide synthesis

Aspergillus terreus sectorization: a morphological phenomenon shedding light on amphotericin B resistance mechanism

Genomic characterization and fermentation study of the endophyte Stemphylium sp. (Aa22), a producer of bioactive alkyl-resorcinols

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

Genome-Mining Based Discovery of Pyrrolomycin K and L from the Termite-Associated Micromonospora sp. RB23