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Antibiotics (Basel, Switzerland)
Sep 13, 2018;7 (3):

Natural Products from Actinobacteria Associated with Fungus-Growing Termites.

René Benndorf, Huijuan Guo, Elisabeth Sommerwerk, Christiane Weigel, Maria Garcia-Altares, Karin Martin, Haofu Hu, Michelle Küfner, Z Wilhelm de Beer, Michael Poulsen, Christine Beemelmanns
Author Information
  1. René Benndorf: Leibniz Institute for Natural Product Research and Infection Biology-Hans-Knöll-Institute, Beutenbergstraße 11a, 07745 Jena, Germany. rene.benndorf@hki-jena.de.
  2. Huijuan Guo: Leibniz Institute for Natural Product Research and Infection Biology-Hans-Knöll-Institute, Beutenbergstraße 11a, 07745 Jena, Germany. huijuan.guo@hki-jena.de.
  3. Elisabeth Sommerwerk: Leibniz Institute for Natural Product Research and Infection Biology-Hans-Knöll-Institute, Beutenbergstraße 11a, 07745 Jena, Germany. e.sommerwerk@gmail.com.
  4. Christiane Weigel: Leibniz Institute for Natural Product Research and Infection Biology-Hans-Knöll-Institute, Beutenbergstraße 11a, 07745 Jena, Germany. christiane.weigel@leibniz-hki.de.
  5. Maria Garcia-Altares: Leibniz Institute for Natural Product Research and Infection Biology-Hans-Knöll-Institute, Beutenbergstraße 11a, 07745 Jena, Germany. maria.garcia-altares@leibniz-hki.de.
  6. Karin Martin: Leibniz Institute for Natural Product Research and Infection Biology-Hans-Knöll-Institute, Beutenbergstraße 11a, 07745 Jena, Germany. karin.martin@leibniz-hki.de.
  7. Haofu Hu: Section for Ecology and Evolution, Department of Biology, University of Copenhagen, 2100 Copenhagen East, Denmark. Haofu.Hu@bio.ku.dk.
  8. Michelle Küfner: Leibniz Institute for Natural Product Research and Infection Biology-Hans-Knöll-Institute, Beutenbergstraße 11a, 07745 Jena, Germany. michelle.kuefner@gmx.de.
  9. Z Wilhelm de Beer: Department of Microbiology and Plant Pathology, Forestry and Agriculture Biotechnology Institute, University of Pretoria, Pretoria 0001, South Africa. wilhelm.debeer@fabi.up.ac.za. ORCID
  10. Michael Poulsen: Section for Ecology and Evolution, Department of Biology, University of Copenhagen, 2100 Copenhagen East, Denmark. MPoulsen@bio.ku.dk. ORCID
  11. Christine Beemelmanns: Leibniz Institute for Natural Product Research and Infection Biology-Hans-Knöll-Institute, Beutenbergstraße 11a, 07745 Jena, Germany. christine.beemelmanns@hki-jena.de. ORCID
PMID: 30217010 DOI: 10.3390/antibiotics7030083

Abstract

The chemical analysis of insect-associated Actinobacteria has attracted the interest of natural product chemists in the past years as bacterial-produced metabolites are sought to be crucial for sustaining and protecting the insect host. The objective of our study was to evaluate the phylogeny and bioprospecting of Actinobacteria associated with fungus-growing termites. We characterized 97 Actinobacteria from the gut, exoskeleton, and fungus garden (comb) of the fungus-growing termite and used two different bioassays to assess their general antimicrobial activity. We selected two strains for chemical analysis and investigated the culture broth of the axenic strains and fungus-actinobacterium co-cultures. From these studies, we identified the previously-reported PKS-derived barceloneic acid A and the PKS-derived rubterolones. Analysis of culture broth yielded a new dichlorinated diketopiperazine derivative and two new tetracyclic lanthipeptides, named rubrominins A and B. The discussed natural products highlight that insect-associated Actinobacteria are highly prolific natural product producers yielding important chemical scaffolds urgently needed for future drug development programs.

Keywords

actinobacteria chemical ecology drug discovery secondary metabolites symbiosis

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Grants

  1. CRC 1127, BE-4799/3-1/Deutsche Forschungsgemeinschaft
  2. VKR10101/Villum Kann Rasmussen Foundation
Journal Article
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Word Cloud

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