Cited by 41Microbial Natural Products and BiosynthesisFungal Infections and StudiesBioactive Natural Diterpenoids Research

Discovery of Ibomycin, a Complex Macrolactone that Exerts Antifungal Activity by Impeding Endocytic Trafficking and Membrane Function

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Robbins, Nicole, Spitzer, Michaela, Wang, Wenliang, Waglechner, Nicholas, Patel, Dhruv J., O’Brien, Jonathan S., Ejim, Linda, Ejim, Obi +2 more·2016·Cell Chemical Biology

Abstract

Natural products are invaluable historic sources of drugs for infectious diseases; however, the discovery of novel antimicrobial chemical scaffolds has waned in recent years. Concurrently, there is a pressing need for improved therapeutics to treat fungal infections. We employed a co-culture screen to identify ibomycin, a large polyketide macrolactone that has preferential killing activity against Cryptococcus neoformans. Using chemical and genome methods, we determined the structure of ibomycin and identified the biosynthetic cluster responsible for its synthesis. Chemogenomic profiling coupled with cell biological assays link ibomycin bioactivity to membrane function. The preferential activity of ibomycin toward C. neoformans is due to the ability of the compound to selectively permeate its cell wall. These results delineate a novel antifungal agent that is produced by one of the largest documented biosynthetic clusters to date and underscore the fact that there remains significant untapped chemical diversity of natural products with application in antimicrobial research.

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Crossref · 10.1016/j.chembiol.2016.08.015

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  • Screening a diverse collection of natural product-producing actinomycete strains led to identification of ibomycin as an inhibitor of C. neoformans growth, owing to its ability to permeate the fungal cell wall and affect membrane function by disrupting endosomal trafficking.

    “Furthermore, screening a diverse collection of natural product-producing actinomycete strains led to identification of the glycosylated macrolactone ibomycin as an inhibitor of C. neoformans growth, owing to its ability to permeate the fungal cell wall and affect membrane function by disrupting endosomal trafficking90”

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Authors
Robbins, N., Spitzer, M., Wang, W., Waglechner, N., Patel, D. J., O’Brien, J. S., Ejim, L., Ejim, O., Tyers, M., & Wright, G. D.
Affiliations
  • Michael G. DeGroote Institute for Infectious Disease Research (CA)
  • Enugu State University of Science and Technology (NG)
  • Institute for Research in Immunology and Cancer (CA)
Corresponding author
Wright, Gerard D.
Venue
Cell Chemical Biology
Publisher
Elsevier BV
Published
2016-11
Volume
23
Issue
11
Pages
1383-1394
ISSN
  • 2451-9448 (ISSN-L)
  • 2451-9456
OpenAlex
W2530023637
Cited by
41
References
47
Citations by year
2026: 5 · 2025: 2 · 2024: 6 · 2023: 7 · 2022: 4 · 2021: 5 · 2020: 5 · 2019: 2 · 2018: 2 · 2017: 2 · 2016: 1
FWCI
1.89
Type
journal article
Language
en
Open access
Locations
  • Cell chemical biology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Canadian Institutes of Health Research (FRN119572)
Topics
  • Health Sciences › Medicine › Pharmacology › Microbial Natural Products and Biosynthesis
  • Health Sciences › Medicine › Epidemiology › Fungal Infections and Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bioactive Natural Diterpenoids Research
Keywords
antifungal natural products, Cryptococcus neoformans, fungal infection, endosomal trafficking, membrane function, cell wall permeability, biosynthetic gene clusters, chemogenomic profiling, structure elucidation
MeSH terms
Antifungal Agents, Biological Products, Cell Wall, Cryptococcosis, Cryptococcus neoformans, Fungi, Humans, Lactones, Microbial Sensitivity Tests, Mycoses, Coculture Techniques, Drug Discovery

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