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Coniontins, lipopetaibiotics active against Candida auris identified from a microbial natural product fractionation library

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Listed:
  • Xuefei Chen

    (McMaster University)

  • Kalinka Koteva

    (McMaster University)

  • Sommer Chou

    (McMaster University)

  • Allison Guitor

    (McMaster University)

  • Daniel Pallant

    (McMaster University)

  • Yunjin Lee

    (University of Toronto)

  • David Sychantha

    (McMaster University)

  • Shawn French

    (McMaster University)

  • Dirk Hackenberger

    (McMaster University)

  • Nicole Robbins

    (University of Toronto)

  • Michael A. Cook

    (McMaster University)

  • Eric D. Brown

    (McMaster University)

  • Lesley T. MacNeil

    (McMaster University)

  • Leah E. Cowen

    (University of Toronto)

  • Gerard D. Wright

    (McMaster University)

Abstract

The rise of drug-resistant fungal pathogens, including Candida auris, highlights the urgent need for innovative antifungal therapies. We have developed a cost-effective platform combining microbial extract prefractionation with rapid mass spectrometry-bioinformatics-based dereplication to efficiently prioritize previously uncharacterized antifungal scaffolds. Screening C. auris and Candida albicans reveals coniotins, lipopeptaibiotics isolated from Coniochaeta hoffmannii, which are undetectable in crude extracts. Coniotins exhibits potent activity against critical priority fungal pathogens listed by the World Health Organization, including C. albicans, Cryptococcus neoformans, multidrug-resistant Candida auris, and Aspergillus fumigatus, with high selectivity and low resistance potential. Coniotin A targets beta-glucan, compromising fungal cell wall integrity, remodelling, and sensitizing C. auris to caspofungin. Identification of its hybrid polyketide synthase–nonribosomal peptide synthetase biosynthetic gene cluster facilitates discovering structurally diverse lipopeptaibiotics. Here, we show that natural product prefractionation enables the discovery of previously hidden bioactive scaffolds and introduces coniotins as candidates for combating multidrug-resistant fungal pathogens.

Suggested Citation

  • Xuefei Chen & Kalinka Koteva & Sommer Chou & Allison Guitor & Daniel Pallant & Yunjin Lee & David Sychantha & Shawn French & Dirk Hackenberger & Nicole Robbins & Michael A. Cook & Eric D. Brown & Lesl, 2025. "Coniontins, lipopetaibiotics active against Candida auris identified from a microbial natural product fractionation library," Nature Communications, Nature, vol. 16(1), pages 1-19, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-62630-z
    DOI: 10.1038/s41467-025-62630-z
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