secondary metabolism – Page 4

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

mycolabadmin

Scientists discovered a special bacterium called Streptomyces formicae living with plant-ants in Africa that produces powerful antibiotics. This bacterium can kill dangerous drug-resistant bacteria and fungi that are hard to treat with current medicines. By using genetic tools, researchers are unlocking the bacterium’s hidden potential to create many more new antibiotics that could help fight infections.

The VelB IDD promotes selective heterodimer formation of velvet proteins for fungal development

mycolabadmin

Fungi use special proteins called velvet factors to decide whether to make spores, form protective structures, or produce toxins. This research discovered that one velvet protein called VelB has a special flexible region that helps it choose the right partner protein to team up with. This teamwork determines what developmental path the fungus takes and what chemicals it produces, revealing a clever biological control system.

Transformation of Alternaria dauci demonstrates the involvement of two polyketide synthase genes in aldaulactone production and fungal pathogenicity

mycolabadmin

A fungus that causes leaf spots on carrots produces a toxic chemical that helps it infect plants. Scientists identified two genes responsible for making this toxin and used genetic engineering to create mutant fungi unable to produce it. When these mutant fungi tried to infect carrot plants, they were much less damaging than the normal fungus, proving the toxin is crucial for the fungus to cause disease.

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

mycolabadmin

Scientists discovered two new antimicrobial compounds called pyrrolomycins from bacteria living in termites using genome sequencing and chemical analysis. These compounds contain chlorine atoms and are related to known antibiotics. The research shows how the bacteria protects itself from its own antimicrobial compounds through chemical modifications, offering insights into developing new antibiotics.

Genetic regulation of l-tryptophan metabolism in Psilocybe mexicana supports psilocybin biosynthesis

mycolabadmin

Researchers studied how magic mushrooms (Psilocybe mexicana) control their chemical processes to make psilocybin. They found that when mushrooms start producing psilocybin, they turn on genes that make more of an amino acid called tryptophan, while turning off genes that would break it down. They also discovered and studied an enzyme that helps control tryptophan use. This understanding could help grow these mushrooms with more consistent psilocybin levels for legitimate medical research into treating depression.

Energy Metabolism Enhance Perylenequinone Biosynthesis in Shiraia sp. Slf14 through Promoting Mitochondrial ROS Accumulation

mycolabadmin

Scientists studied two similar fungi to understand how one produces more of a beneficial compound called perylenequinones (PQs), which have medical uses against infections and cancer. They discovered that the high-producing strain uses energy more efficiently, which causes tiny structures in the cells called mitochondria to produce reactive molecules (ROS). These reactive molecules trigger the fungus to make more PQs as a protective response. By controlling these processes, researchers can potentially improve the production of this valuable medicine.

Insights into microbiome-triterpenoid correlation in Poria cocos via comparative analysis of sclerotial and soil microenvironments

mycolabadmin

This study explores how the medicinal mushroom Poria cocos creates its own special microbial environment inside its sclerotium (the part used in medicine). Researchers found that the mushroom selectively enriches certain bacteria and fungi while maintaining lower overall microbial diversity compared to surrounding soil. The study reveals that specific microbes like Burkholderia and Scytalidium are positively associated with the production of pachymic acid, the mushroom’s key medicinal compound with anti-tumor and anti-inflammatory properties.

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

mycolabadmin

Mycophenolic acid is an important drug that helps transplant patients by preventing their immune systems from rejecting new organs. Scientists studied the genes that fungi use to make this drug and found it in several fungal species. They discovered that this ability to produce the drug evolved a long time ago in fungi but was lost in most species over time, remaining only in a few special fungi.

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

mycolabadmin

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.

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

mycolabadmin

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.

Research Topic: secondary metabolism