1. In Cellulo Mössbauer and EPR Studies Bring New Evidence to the Long‐Standing Debate on Iron–Sulfur Cluster Binding in Human Anamorsin
- Author
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Geneviève Blondin, Martin Clémancey, Lucia Banci, Francesca Camponeschi, Simone Ciofi-Baffoni, Sara Matteucci, University of Florence, Department of Chemistry and Magnetic Resonance Center (CERM), Consorzio Interuniversitario Risonanze Magnetiche di Metallo Proteine (CIRMMP), Università degli Studi di Siena = University of Siena (UNISI)-Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI)-University of Bologna-Partenaires INRAE, Physiochimie des Métaux (PMB), Laboratoire de Chimie et Biologie des Métaux (LCBM - UMR 5249), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA), Department of Chemistry, University of Florence, ANR-17-EURE-0003,CBH-EUR-GS,CBH-EUR-GS(2017), ANR-11-LABX-0003,ARCANE,Grenoble, une chimie bio-motivée(2011), Università degli Studi di Firenze = University of Florence (UniFI), and Università degli Studi di Siena = University of Siena (UNISI)-Università degli Studi di Firenze = University of Florence (UniFI)-University of Bologna/Università di Bologna-Partenaires INRAE
- Subjects
Iron-Sulfur Proteins ,anamorsin ,Protein family ,Stereochemistry ,metalloproteins ,Iron–sulfur cluster ,[SDV.BC]Life Sciences [q-bio]/Cellular Biology ,010402 general chemistry ,01 natural sciences ,Catalysis ,law.invention ,03 medical and health sciences ,Spectroscopy, Mossbauer ,chemistry.chemical_compound ,in cellulo EPR spectroscopy ,law ,Mössbauer spectroscopy ,Iron-sulfur cluster binding ,Cluster (physics) ,Metalloprotein ,Humans ,in cellulo Mcssbauer spectroscopy ,[SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology ,Electron paramagnetic resonance ,030304 developmental biology ,chemistry.chemical_classification ,0303 health sciences ,010405 organic chemistry ,Communication ,Electron Spin Resonance Spectroscopy ,Intracellular Signaling Peptides and Proteins ,General Medicine ,General Chemistry ,Communications ,iron-sulfur clusters ,0104 chemical sciences ,chemistry ,Iron–Sulfur Clusters ,in cellulo Mössbauer spectroscopy ,[PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph] ,Biogenesis ,Protein Binding - Abstract
Human anamorsin is an iron–sulfur (Fe–S)‐cluster‐binding protein acting as an electron donor in the early steps of cytosolic iron–sulfur protein biogenesis. Human anamorsin belongs to the eukaryotic CIAPIN1 protein family and contains two highly conserved cysteine‐rich motifs, each binding an Fe–S cluster. In vitro works by various groups have provided rather controversial results for the type of Fe–S clusters bound to the CIAPIN1 proteins. In order to unravel the knot on this topic, we used an in cellulo approach combining Mössbauer and EPR spectroscopies to characterize the iron–sulfur‐cluster‐bound form of human anamorsin. We found that the protein binds two [2Fe–2S] clusters at both its cysteine‐rich motifs., A combined in cellulo Mössbauer‐ and EPR‐based approach is applied to address controversial aspects of Fe–S cluster‐binding properties of human anamorsin, a protein involved in the biogenesis of cytosolic [4Fe–4S] cluster‐binding proteins. We show that human anamorsin binds two [2Fe–2S] clusters in‐cell in two highly conserved cysteine‐rich motifs typical of the eukaryotic CIAPIN1 protein family, with different electron‐spin‐relaxation properties.
- Published
- 2021