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Unveiling the Pool of Metallophores in Native Environments and Correlation with Their Potential Producers

Abstract

For many organisms, metallophores are essential biogenic ligands that ensure metal scavenging and acquisition from their environment. Their identification is challenging in highly organic matter rich environments like peatlands due to low solubilization and metal scarcity and high matrix complexity. In contrast to common approaches based on sample modification by spiking of metal isotope tags, we have developed a two-dimensional (2D) Solid-phase extraction-Liquid chromatography-mass spectrometry (SPE-LC-MS) approach for the highly sensitive (LOD 40 fmol per g of soil), high-resolution direct detection and identification of metallophores in both their noncomplexed (apo) and metal-complexed forms in native environments. The characterization of peat collected in the Bernadouze (France) peatland resulted in the identification of 53 metallophores by a database mass-based search, 36 among which are bacterial. Furthermore, the detection of the characteristic (natural) metal isotope patterns in MS resulted in the detection of both Fe and Cu potential complexes. A taxonomic-based inference method was implemented based on literature and public database (antiSMASH database version 3.0) searches, enabling to associate over 40% of the identified bacterial metallophores with potential producers. In some cases, low completeness with the MIBiG reference BCG might be indicative of alternative producers in the ecosystem. Thus, coupling of metallophore detection and producers’ inference could pave a new way to investigate poorly documented environment searching for new metallophores and their producers yet unknown.

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Category:
Articles
Type:
artykuły w czasopismach
Published in:
ENVIRONMENTAL SCIENCE & TECHNOLOGY no. 57, pages 17302 - 17311,
ISSN: 0013-936X
Language:
English
Publication year:
2023
Bibliographic description:
Calderón Celis F., González-Álvarez I., Fabjanowicz M., Godin S., Ouerdane L., Lauga B., Łobiński R.: Unveiling the Pool of Metallophores in Native Environments and Correlation with Their Potential Producers// ENVIRONMENTAL SCIENCE & TECHNOLOGY -Vol. 57,iss. 45 (2023), s.17302-17311
DOI:
Digital Object Identifier (open in new tab) 10.1021/acs.est.3c04582
Sources of funding:
  • Free publication
Verified by:
Gdańsk University of Technology

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