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Gold biomineralization by a metallophore from a gold-associated microbe

Nature Chemical Biology volume 9, pages 241–243 (2013)Cite this article

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Abstract

Microorganisms produce and secrete secondary metabolites to assist in their survival. We report that the gold resident bacterium Delftia acidovorans produces a secondary metabolite that protects from soluble gold through the generation of solid gold forms. This finding is the first demonstration that a secreted metabolite can protect against toxic gold and cause gold biomineralization.

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Figure 1: Delftia acidovorans produces a nonribosomal peptide that creates gold nanoparticles.
Figure 2: Delftibactin detoxifies soluble gold and enables growth in toxic AuCl3 concentrations.
Figure 3: Gold complexation by delftibactin leads to the creation of nontoxic solid gold particles.

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Acknowledgements

This work was funded through Natural Sciences and Engineering Research Council (NSERC) of Canada Discovery grants (RGPIN 371576-2009; 101997-2006), an NSERC Strategic grant (STPGP385235-09) and a Canadian Foundation for Innovation grant (2010M00022). M.A.W. is funded through a Canadian Institutes of Health (CIHR) Doctoral Research Award. N.A.M. is funded by a CIHR New Investigator Award.

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Author notes

  1. Chad W Johnston and Morgan A Wyatt: These authors contributed equally to this work.

Authors and Affiliations

  1. Department of Biochemistry and Biomedical Sciences, M.G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, Ontario, Canada

    Chad W Johnston, Morgan A Wyatt, Xiang Li, Ashraf Ibrahim & Nathan A Magarvey

  2. Department of Chemistry and Chemical Biology, M.G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, Ontario, Canada

    Chad W Johnston, Morgan A Wyatt, Xiang Li, Ashraf Ibrahim & Nathan A Magarvey

  3. Department of Earth Sciences, Western University, Ontario, London, Ontario, Canada.,

    Jeremiah Shuster & Gordon Southam

  4. Department of Biology, Western University, Ontario, London, Ontario, Canada.,

    Gordon Southam

Authors
  1. Chad W Johnston
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  7. Nathan A Magarvey
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Contributions

C.W.J. isolated delftibactins, constructed the genetically modified strain, performed gold experiments and contributed to study design. M.A.W. isolated delftibactins, performed gold experiments and contributed to study design. X.L. performed structural analysis. A.I. performed structural and MS/MS analysis and isolated delftibactin B. J.S. obtained transmission electron microscopy (TEM) images. G.S. performed TEM image analysis. N.A.M. contributed to study design and wrote the manuscript. All authors discussed the results and commented on the manuscript.

Corresponding author

Correspondence to Nathan A Magarvey.

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Johnston, C., Wyatt, M., Li, X. et al. Gold biomineralization by a metallophore from a gold-associated microbe. Nat Chem Biol 9, 241–243 (2013). https://doi.org/10.1038/nchembio.1179

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