{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T10:43:26Z","timestamp":1790765006335,"version":"4.1.0"},"reference-count":58,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2023,10,31]],"date-time":"2023-10-31T00:00:00Z","timestamp":1698710400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Commonwealth of Pennsylvania University Biologists"},{"name":"Slippery Rock University Faculty Student Research"},{"name":"Department of Biology, Slippery Rock University"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Microorganisms"],"abstract":"<jats:p>The field of microbe\u2013metal interactions has been gaining significant attention. While the direct impact of metal oxyanions on bacteria has been investigated, significantly less attention has been placed on the ability of certain microbes to \u2018collect\u2019 such metal ions via secreted proteins. Many bacteria possess low-weight molecules called siderophores, which collect Fe from the environment to be brought back to the cell. However, some appear to have additional roles, including binding other metals, termed \u2018metallophores\u2019. Microbes can remove\/sequester these from their surroundings, but the breadth of those that can be removed is still unknown. Using the Chromeazurol S assay, we identified eight isolates, most belonging to the genus Pseudomonas, possessing siderophore activity, mainly from sites impacted by coal mine drainage, also possessing a metallophore activity toward the rare earth elements that does not appear to be related to ionic radii or previously reported EC50 concentrations for E. coli. We found the strength of metallophore activity towards these elements was as follows: Pr &gt; Sc &gt; Eu &gt; Tm &gt; Tb &gt; Er &gt; Yb &gt; Ce &gt; Lu &gt; Sm &gt; Ho &gt; La &gt; Nd &gt; Dy &gt; Gd &gt; Y. This is the first study to investigate such activity and indicates bacteria may provide a means of removal\/recovery of these critical elements.<\/jats:p>","DOI":"10.3390\/microorganisms11112672","type":"journal-article","created":{"date-parts":[[2023,10,31]],"date-time":"2023-10-31T12:44:03Z","timestamp":1698756243000},"page":"2672","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Metallophore Activity toward the Rare Earth Elements by Bacteria Isolated from Acid Mine Drainage Due to Coal Mining"],"prefix":"10.3390","volume":"11","author":[{"given":"Stephanie","family":"Skeba","sequence":"first","affiliation":[{"name":"Department of Biology, Slippery Rock University, Slippery Rock, PA 16057, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Morgan","family":"Snyder","sequence":"additional","affiliation":[{"name":"Department of Biology, Slippery Rock University, Slippery Rock, PA 16057, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chris","family":"Maltman","sequence":"additional","affiliation":[{"name":"Department of Biology, Slippery Rock University, Slippery Rock, PA 16057, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,10,31]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"160","DOI":"10.1016\/S1367-5931(03)00026-7","article-title":"Microbe-metal interactions in marine hydrothermal vent environments","volume":"7","author":"Holden","year":"2003","journal-title":"Curr. 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