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Multinuclear Silver(I)–Selenium Clusters Formation in Selenopeptides
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    Multinuclear Silver(I)–Selenium Clusters Formation in Selenopeptides
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    • Tshering Zangmo
      Tshering Zangmo
      Université de Pau et des Pays de l’Adour, E2S UPPA, CNRS, IPREM, 2 Avenue du Président Pierre Angot, Pau 64053, France
    • Paulina Szczerba
      Paulina Szczerba
      Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
    • Ioannis Kanavos
      Ioannis Kanavos
      Université de Pau et des Pays de l’Adour, E2S UPPA, CNRS, IPREM, 2 Avenue du Président Pierre Angot, Pau 64053, France
    • Alejandro Gutiérrez-Quintanilla
      Alejandro Gutiérrez-Quintanilla
      Université de Pau et des Pays de l’Adour, E2S UPPA, CNRS, IPREM, 2 Avenue du Président Pierre Angot, Pau 64053, France
    • Karinne Miqueu
      Karinne Miqueu
      Université de Pau et des Pays de l’Adour, E2S UPPA, CNRS, IPREM, 2 Avenue du Président Pierre Angot, Pau 64053, France
    • Joanna Szpunar
      Joanna Szpunar
      Université de Pau et des Pays de l’Adour, E2S UPPA, CNRS, IPREM, 2 Avenue du Président Pierre Angot, Pau 64053, France
    • Panaghiotis Karamanis
      Panaghiotis Karamanis
      Université de Pau et des Pays de l’Adour, E2S UPPA, CNRS, IPREM, 2 Avenue du Président Pierre Angot, Pau 64053, France
    • Wojciech Bal
      Wojciech Bal
      Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
      More by Wojciech Bal
    • Luisa Ronga*
      Luisa Ronga
      Université de Pau et des Pays de l’Adour, E2S UPPA, CNRS, IPREM, 2 Avenue du Président Pierre Angot, Pau 64053, France
      *Email: [email protected]
      More by Luisa Ronga
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    Inorganic Chemistry

    Cite this: Inorg. Chem. 2025, 64, 11, 5348–5353
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    https://doi.org/10.1021/acs.inorgchem.4c04867
    Published March 12, 2025
    Copyright © 2025 American Chemical Society

    Abstract

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    The reactions of ionic silver (Ag+) with arginine vasopressin (AVP), a nonapeptide hormone cyclized by two cysteine residues, and its diselenium analogue was explored by an integrated LC-MS, UV–vis, and DFT approach. The replacement of Cys by SeCys in AVP increased the reactivity of the peptide toward Ag+ ions under mildly reducing conditions, with the formation of a Se4Ag4 cluster provided by Ag(I)-mediated dimerization of diselenide AVP. Specific electronic absorption bands confirmed the formation of the Ag4peptide2 complex, supported by DFT calculations. These results provide the first ever evidence that Ag(I) ions bind a selenopeptide and prefer SeCys over Cys as binding sites, opening a perspective on the involvement of selenobiomolecules in the emerging cellular toxicity of silver.

    Copyright © 2025 American Chemical Society

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    Supporting Information

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    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.inorgchem.4c04867.

    • Experimental procedures, supplementary LC-MS, UV–vis, and DFT analyses (PDF)

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    Inorganic Chemistry

    Cite this: Inorg. Chem. 2025, 64, 11, 5348–5353
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acs.inorgchem.4c04867
    Published March 12, 2025
    Copyright © 2025 American Chemical Society

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