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secondary metabolism

  • Open Access
    Cryptic or Silent? The Known Unknowns, Unknown Knowns, and Unknown Unknowns of Secondary Metabolism
    Perspective | Applied and Environmental Science
    Cryptic or Silent? The Known Unknowns, Unknown Knowns, and Unknown Unknowns of Secondary Metabolism

    Microbial natural products, particularly those produced by filamentous Actinobacteria, underpin the majority of clinically used antibiotics. Unfortunately, only a few new antibiotic classes have been discovered since the 1970s, which has exacerbated fears of a postapocalyptic world in which antibiotics have lost their utility. Excitingly, the genome sequencing revolution painted an entirely new picture, one in which an average...

    Paul A. Hoskisson, Ryan F. Seipke
  • Open Access
    Bacterial Secondary Metabolite Biosynthetic Potential in Soil Varies with Phylum, Depth, and Vegetation Type
    Research Article | Applied and Environmental Science
    Bacterial Secondary Metabolite Biosynthetic Potential in Soil Varies with Phylum, Depth, and Vegetation Type

    Microbes produce specialized compounds to compete or communicate with one another and their environment. Some of these compounds, such as antibiotics, are also useful in medicine and biotechnology. Historically, most antibiotics have come from soil bacteria which can be isolated and grown in the lab. Though the vast majority of soil bacteria cannot be isolated, we can extract their genetic information and search it for genes which...

    Allison M. Sharrar, Alexander Crits-Christoph, Raphaël Méheust, Spencer Diamond, Evan P. Starr, Jillian F. Banfield
  • Open Access
    Metagenomic Exploration of the Marine Sponge <em>Mycale hentscheli</em> Uncovers Multiple Polyketide-Producing Bacterial Symbionts
    Research Article | Host-Microbe Biology
    Metagenomic Exploration of the Marine Sponge Mycale hentscheli Uncovers Multiple Polyketide-Producing Bacterial Symbionts

    Mycale hentscheli is a marine sponge that is rich in bioactive small molecules. Here, we use direct metagenomic sequencing to elucidate highly complete and contiguous genomes for the major symbiotic bacteria of this sponge. We identify complete biosynthetic pathways for the three potent cytotoxic polyketides which have previously been isolated from M. hentscheli. Remarkably, and in contrast to previous studies of...

    Mathew A. Storey, Sarah K. Andreassend, Joe Bracegirdle, Alistair Brown, Robert A. Keyzers, David F. Ackerley, Peter T. Northcote, Jeremy G. Owen
  • Open Access
    Multi-Omic Analyses Provide Links between Low-Dose Antibiotic Treatment and Induction of Secondary Metabolism in <span class="named-content genus-species" id="named-content-1">Burkholderia thailandensis</span>
    Research Article | Molecular Biology and Physiology
    Multi-Omic Analyses Provide Links between Low-Dose Antibiotic Treatment and Induction of Secondary Metabolism in Burkholderia thailandensis

    The discovery of antibiotics ranks among the most significant accomplishments of the last century. Although the targets of nearly all clinical antibiotics are known, our understanding regarding their natural functions and the effects of subinhibitory concentrations is in its infancy. Stimulatory rather than inhibitory functions have been attributed to low-dose antibiotics. Among these, we previously found that antibiotics activate...

    Anran Li, Dainan Mao, Aya Yoshimura, Paul C. Rosen, W. Lance Martin, Étienne Gallant, Martin Wühr, Mohammad R. Seyedsayamdost
  • Open Access
    Gliotoxin, a Known Virulence Factor in the Major Human Pathogen <span class="named-content genus-species" id="named-content-1">Aspergillus fumigatus</span>, Is Also Biosynthesized by Its Nonpathogenic Relative <em>Aspergillus fischeri</em>
    Observation | Ecological and Evolutionary Science
    Gliotoxin, a Known Virulence Factor in the Major Human Pathogen Aspergillus fumigatus, Is Also Biosynthesized by Its Nonpathogenic Relative Aspergillus fischeri

    Aspergillus fumigatus is a major opportunistic fungal pathogen of humans, but most of its close relatives are nonpathogenic. Why is that so? This important, yet largely unanswered, question can be addressed by examining how A. fumigatus and its close nonpathogenic relatives are similar or different...

    Sonja L. Knowles, Matthew E. Mead, Lilian Pereira Silva, Huzefa A. Raja, Jacob L. Steenwyk, Gustavo H. Goldman, Nicholas H. Oberlies, Antonis Rokas
  • Open Access
    Integrative Activity of Mating Loci, Environmentally Responsive Genes, and Secondary Metabolism Pathways during Sexual Development of <span class="named-content genus-species" id="named-content-1">Chaetomium globosum</span>
    Research Article | Ecological and Evolutionary Science
    Integrative Activity of Mating Loci, Environmentally Responsive Genes, and Secondary Metabolism Pathways during Sexual Development of Chaetomium globosum

    Fungal diversity has amazed evolutionary biologists for decades. One societally important aspect of this diversity manifests in traits that enable pathogenicity. The opportunistic pathogen Chaetomium globosum is well adapted to a high-humidity environment and produces numerous secondary metabolites that defend it from predation. Many of these chemicals can threaten...

    Zheng Wang, Francesc López-Giráldez, Junrui Wang, Frances Trail, Jeffrey P. Townsend
  • Open Access
    Rapid Phenotypic and Metabolomic Domestication of Wild <em>Penicillium</em> Molds on Cheese
    Editor's Pick Research Article | Applied and Environmental Science
    Rapid Phenotypic and Metabolomic Domestication of Wild Penicillium Molds on Cheese

    Industrial cultures of filamentous fungi are used to add unique aesthetics and flavors to cheeses and other microbial foods. How these microbes adapted to live in food environments is generally unknown as most microbial domestication is unintentional. Our work demonstrates that wild molds closely related to the starter culture Penicillium camemberti can readily lose...

    Ina Bodinaku, Jason Shaffer, Allison B. Connors, Jacob L. Steenwyk, Megan N. Biango-Daniels, Erik K. Kastman, Antonis Rokas, Albert Robbat, Benjamin E. Wolfe
  • Open Access
    A Single Biosynthetic Gene Cluster Is Responsible for the Production of Bagremycin Antibiotics and Ferroverdin Iron Chelators
    Editor's Pick Research Article | Applied and Environmental Science
    A Single Biosynthetic Gene Cluster Is Responsible for the Production of Bagremycin Antibiotics and Ferroverdin Iron Chelators

    Access to whole-genome sequences has exposed the general incidence of the so-called cryptic biosynthetic gene clusters (BGCs), thereby renewing their interest for natural product discovery. As a consequence, genome mining is the often first approach implemented to assess the potential of a microorganism for producing novel bioactive metabolites. By revealing a new level of complexity of natural product biosynthesis, we further...

    Loïc Martinet, Aymeric Naômé, Benoit Deflandre, Marta Maciejewska, Déborah Tellatin, Elodie Tenconi, Nicolas Smargiasso, Edwin de Pauw, Gilles P. van Wezel, Sébastien Rigali
  • Open Access
    A Robust Phylogenomic Time Tree for Biotechnologically and Medically Important Fungi in the Genera <em>Aspergillus</em> and <em>Penicillium</em>
    Research Article | Ecological and Evolutionary Science
    A Robust Phylogenomic Time Tree for Biotechnologically and Medically Important Fungi in the Genera Aspergillus and Penicillium

    Understanding the evolution of traits across technologically and medically significant fungi requires a robust phylogeny. Even though species in the Aspergillus and Penicillium genera (family Aspergillaceae, class Eurotiomycetes) are some of the most significant technologically and medically relevant fungi, we still lack a genome-scale phylogeny of...

    Jacob L. Steenwyk, Xing-Xing Shen, Abigail L. Lind, Gustavo H. Goldman, Antonis Rokas
  • Open Access
    Integration of Fungus-Specific CandA-C1 into a Trimeric CandA Complex Allowed Splitting of the Gene for the Conserved Receptor Exchange Factor of CullinA E3 Ubiquitin Ligases in Aspergilli
    Research Article | Molecular Biology and Physiology
    Integration of Fungus-Specific CandA-C1 into a Trimeric CandA Complex Allowed Splitting of the Gene for the Conserved Receptor Exchange Factor of CullinA E3 Ubiquitin Ligases in Aspergilli

    Aspergillus species are important for biotechnological applications, like the production of citric acid or antibacterial agents. Aspergilli can cause food contamination or invasive aspergillosis to immunocompromised humans or animals. Specific treatment is difficult due to limited drug targets and emerging resistances. The CandA complex regulates, as a receptor...

    Anna M. Köhler, Rebekka Harting, Annika E. Langeneckert, Oliver Valerius, Jennifer Gerke, Cindy Meister, Anja Strohdiek, Gerhard H. Braus

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