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Liu W, Worms IAM, Herlin-Boime N, Truffier-Boutry D, Michaud-Soret I, Mintz E, Vidaud C, Rollin-Genetet F. Interaction of silver nanoparticles with metallothionein and ceruloplasmin: impact on metal substitution by Ag(i), corona formation and enzymatic activity. Nanoscale 2017; 9:6581-6594. [PMID: 28474724 DOI: 10.1039/c7nr01075c] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The release of Ag(i) from silver nanoparticles (AgNPs) unintentionally spread in the environment is suspected to impair some key biological functions. In comparison with AgNO3, in-depth investigations were carried out into the interactions between citrate-coated AgNPs (20 nm) and two metalloproteins, intracellular metallothionein 1 (MT1) and plasmatic ceruloplasmin (Cp), both involved in metal homeostasis. These were chosen for their physiological relevance and the diversity of their various native metals bound because of thiol groups and/or their structural differences. Transmission electron microscopy (TEM), and dynamic light scattering (DLS), UV-vis and circular dichroism (CD) spectroscopies were used to study the effects of such intricate interactions on AgNP dissolution and proteins in terms of metal exchanges and structural modifications. The isolation of the different populations formed together with on-line quantifications of their metal content were performed by asymmetrical flow field-flow fractionation (AF4) linked to inductively coupled plasma mass spectrometry (ICP-MS). For the 2 proteins, Ag(i) dissolved from the AgNPs, substituted for the native metal, to different extents and with different types of dynamics for the corona formed: the MT1 rapidly surrounded the AgNPs with the transient reticulate corona thus promoting their dissolution associated with the metal substitution, whereas the Cp established a more stable layer around the AgNPs, with a limited substitution of Cu and a decrease in its ferroxidase activity. The accessibility and lability of the metal binding sites inside these proteins and their relative affinities for Ag(i) are discussed, taking into account the structural characteristics of the proteins.
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Affiliation(s)
- Wei Liu
- CEA, DRF-BIAM, Site de Marcoule, F-30207 Bagnols-sur-Cèze, France.
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Veronesi G, Gallon T, Deniaud A, Boff B, Gateau C, Lebrun C, Vidaud C, Rollin-Genetet F, Carrière M, Kieffer I, Mintz E, Delangle P, Michaud-Soret I. XAS Investigation of Silver(I) Coordination in Copper(I) Biological Binding Sites. Inorg Chem 2015; 54:11688-96. [DOI: 10.1021/acs.inorgchem.5b01658] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Giulia Veronesi
- CNRS,
UMR 5249, CNRS-CEA-UJF; CEA;
and University Grenoble Alpes, Laboratoire de Chimie et Biologie des Métaux (LCBM), F-38054 Grenoble, France
- ESRF, European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38043 Grenoble, France
| | - Thomas Gallon
- CNRS,
UMR 5249, CNRS-CEA-UJF; CEA;
and University Grenoble Alpes, Laboratoire de Chimie et Biologie des Métaux (LCBM), F-38054 Grenoble, France
- University
Grenoble Alpes and CEA, INAC-SCIB, F-38000 Grenoble, France
| | - Aurélien Deniaud
- CNRS,
UMR 5249, CNRS-CEA-UJF; CEA;
and University Grenoble Alpes, Laboratoire de Chimie et Biologie des Métaux (LCBM), F-38054 Grenoble, France
| | - Bastien Boff
- University
Grenoble Alpes and CEA, INAC-SCIB, F-38000 Grenoble, France
| | - Christelle Gateau
- University
Grenoble Alpes and CEA, INAC-SCIB, F-38000 Grenoble, France
| | - Colette Lebrun
- University
Grenoble Alpes and CEA, INAC-SCIB, F-38000 Grenoble, France
| | - Claude Vidaud
- CEA/DSV/iBEB/SBTN, BP 17171, 30207 Bagnols sur Cèze, France
| | | | - Marie Carrière
- University
Grenoble Alpes and CEA, INAC-SCIB, F-38000 Grenoble, France
| | - Isabelle Kieffer
- BM30B/FAME
beamline, ESRF, F-38043 Grenoble cedex 9, France
- Observatoire
des Sciences de l’Univers de Grenoble, UMS 832 CNRS, Université Joseph Fourier, F-38041 Grenoble, France
| | - Elisabeth Mintz
- CNRS,
UMR 5249, CNRS-CEA-UJF; CEA;
and University Grenoble Alpes, Laboratoire de Chimie et Biologie des Métaux (LCBM), F-38054 Grenoble, France
| | - Pascale Delangle
- University
Grenoble Alpes and CEA, INAC-SCIB, F-38000 Grenoble, France
| | - Isabelle Michaud-Soret
- CNRS,
UMR 5249, CNRS-CEA-UJF; CEA;
and University Grenoble Alpes, Laboratoire de Chimie et Biologie des Métaux (LCBM), F-38054 Grenoble, France
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Rollin-Genetet F, Seidel C, Artells E, Auffan M, Thiéry A, Vidaud C. Redox Reactivity of Cerium Oxide Nanoparticles Induces the Formation of Disulfide Bridges in Thiol-Containing Biomolecules. Chem Res Toxicol 2015; 28:2304-12. [PMID: 26566067 DOI: 10.1021/acs.chemrestox.5b00319] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The redox state of disulfide bonds is implicated in many redox control systems, such as the cysteine-cystine couple. Among proteins, ubiquitous cysteine-rich metallothioneins possess thiolate metal binding groups susceptible to metal exchange in detoxification processes. CeO2 NPs are commonly used in various industrial applications due to their redox properties. These redox properties that enable dual oxidation states (Ce(IV)/Ce(III)) to exist at their surface may act as oxidants for biomolecules. The interaction among metallothioneins, cysteine, and CeO2 NPs was investigated through various biophysical approaches to shed light on the potential effects of the Ce(4+)/Ce(3+) redox system on the thiol groups of these biomolecules. The possible reaction mechanisms include the formation of a disulfide bridge/Ce(III) complex resulting from the interaction between Ce(IV) and the thiol groups, leading to metal unloading from the MTs, depending on their metal content and cluster type. The formation of stable Ce(3+) disulfide complexes has been demonstrated via their fluorescence properties. This work provides the first evidence of thiol concentration-dependent catalytic oxidation mechanisms between pristine CeO2 NPs and thiol-containing biomolecules.
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Affiliation(s)
- Françoise Rollin-Genetet
- CEA/DSV/iBEB/SBTN, Laboratoire d'Etude des Protéines Cibles, BP17171, F-30207 Bagnols sur Cèze Cedex, France.,Labex Serenade Safe(r) Ecodesign Research and Education applied to NAnomaterial DEvelopment
| | - Caroline Seidel
- CEA/DSV/iBEB/SBTN, Laboratoire d'Etude des Protéines Cibles, BP17171, F-30207 Bagnols sur Cèze Cedex, France
| | - Ester Artells
- Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale (IMBE), Technopôle Arbois-Méditerranée, Bât. Villemin - BP 80, F-13545 Aix-en-Provence cedex 04, France.,Labex Serenade Safe(r) Ecodesign Research and Education applied to NAnomaterial DEvelopment
| | - Mélanie Auffan
- Aix-Marseille Université, CNRS, IRD, CEREGE UM34, UMR 7330, F-13545 Aix en Provence, France.,iCEINT International Consortium for the Environmental Implications of Nanotechnology , F-13545 Aix en Provence, France.,Labex Serenade Safe(r) Ecodesign Research and Education applied to NAnomaterial DEvelopment
| | - Alain Thiéry
- Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale (IMBE), Technopôle Arbois-Méditerranée, Bât. Villemin - BP 80, F-13545 Aix-en-Provence cedex 04, France.,iCEINT International Consortium for the Environmental Implications of Nanotechnology , F-13545 Aix en Provence, France.,Labex Serenade Safe(r) Ecodesign Research and Education applied to NAnomaterial DEvelopment
| | - Claude Vidaud
- CEA/DSV/iBEB/SBTN, Laboratoire d'Etude des Protéines Cibles, BP17171, F-30207 Bagnols sur Cèze Cedex, France.,iCEINT International Consortium for the Environmental Implications of Nanotechnology , F-13545 Aix en Provence, France.,Labex Serenade Safe(r) Ecodesign Research and Education applied to NAnomaterial DEvelopment
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Vidaud C, Gourion-Arsiquaud S, Rollin-Genetet F, Torne-Celer C, Plantevin S, Pible O, Berthomieu C, Quéméneur E. Structural Consequences of Binding of UO22+ to Apotransferrin: Can This Protein Account for Entry of Uranium into Human Cells? Biochemistry 2007; 46:2215-26. [PMID: 17266333 DOI: 10.1021/bi061945h] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
It has been established that transferrin binds a variety of metals. These include toxic uranyl ions which form rather stable uranyl-transferrin derivatives. We determined the extent to which the iron binding sites might accommodate the peculiar topographic profile of the uranyl ion and the consequences of its binding on protein conformation. Indeed, metal intake via endocytosis of the transferrin/transferrin receptor depends on the adequate coordination of the metal in its site, which controls protein conformation and receptor binding. Using UV-vis and Fourier transform infrared difference spectroscopy coupled to a microdialysis system, we showed that at both metal binding sites two tyrosines are uranyl ligands, while histidine does not participate with its coordination sphere. Analysis by circular dichroism and differential scanning calorimetry (DSC) showed major differences between structural changes associated with interactions of iron or uranyl with apotransferrin. Uranyl coordination reduces the level of protein stabilization compared to iron, but this may be simply related to partial lobe closure. The lack of interaction between uranyl-TF and its receptor was shown by flow cytometry using Alexa 488-labeled holotransferrin. We propose a structural model summarizing our conclusion that the uranyl-TF complex adopts an open conformation that is not appropriate for optimal binding to the transferrin receptor.
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Affiliation(s)
- Claude Vidaud
- CEA Valrhô, Service de Biochimie post génomique et de Toxicologie Nucléaire, DSV/DIEP, BP17171, F-30207 Bagnols-sur-Cèze, France.
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Rollin-Genetet F, Berthomieu C, Davin AH, Quéméneur E. Escherichia coli thioredoxin inhibition by cadmium: two mutually exclusive binding sites involving Cys32 and Asp26. ACTA ACUST UNITED AC 2004; 271:1299-309. [PMID: 15030480 DOI: 10.1111/j.1432-1033.2004.04037.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Observations of thioredoxin inhibition by cadmium and of a positive role for thioredoxin in protection from Cd(2+) led us to investigate the thioredoxin-cadmium interaction properties. We used calorimetric and spectroscopic methods at different pH values to explore the relative contribution of putative binding residues (Cys32, Cys35, Trp28, Trp31 and Asp26) within or near the active site. At pH 8 or 7.5 two binding sites were identified by isothermal titration calorimetry with affinity constants of 10 x 10(6) m(-1) and 1 x 10(6) m(-1). For both sites, a proton was released upon Cd(2+) binding. One mole of Cd(2+) per mole of reduced thioredoxin was measured by mass spectrometry at these pH values, demonstrating that the two binding sites were partially occupied and mutually exclusive. Cd(2+) binding at either site totally inhibited the thiol-disulfide transferase activity of Trx. The absence of Cd(2+) interaction detected for oxidized or alkylated Trx and the inhibition of the enzymatic activity of thioredoxin by Cd(2+) supported the role of Cys32 at the first site. The fluorescence profile of Cd(2+)-bound thioredoxin differed, however, from that of oxidized thioredoxin, indicating that Cd(2+) was not coordinated with Cys32 and Cys35. From FTIR spectroscopy, we inferred that the second site might involve Asp26, a buried residue that deprotonates at a rather high and unusual pK(a) for a carboxylate (7.5/9.2). The pK(a) of the two residues Cys32 and Asp26 have been shown to be interdependent [Chivers, T. P. (1997) Biochemistry36, 14985-14991]. A mechanism is proposed in which Cd(2+) binding at the solvent-accessible thiolate group of Cys32 induces a decrease of the pK(a) of Asp26 and its deprotonation. Conversely, interaction between the carboxylate group of Asp26 and Cd(2+) at a second binding site induces Cys32 deprotonation and thioredoxin inhibition, so that Cd(2+) inhibits thioredoxin activity not only by binding at the Cys32 but also by interacting with Asp26.
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Affiliation(s)
- Françoise Rollin-Genetet
- CEA Valrhô, DSV-DIEP, Service de Biochimie postgénomique et Toxicologie Nucléaire, Bagnols-sur-Cèze, France.
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Armengaud J, Fernandez B, Chaumont V, Rollin-Genetet F, Finet S, Marchetti C, Myllykallio H, Vidaud C, Pellequer JL, Gribaldo S, Forterre P, Gans P. Identification, purification, and characterization of an eukaryotic-like phosphopantetheine adenylyltransferase (coenzyme A biosynthetic pathway) in the hyperthermophilic archaeon Pyrococcus abyssi. J Biol Chem 2003; 278:31078-87. [PMID: 12756245 DOI: 10.1074/jbc.m301891200] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Although coenzymeA (CoA) is essential in numerous metabolic pathways in all living cells, molecular characterization of the CoA biosynthetic pathway in Archaea remains undocumented. Archaeal genomes contain detectable homologues for only three of the five steps of the CoA biosynthetic pathway characterized in Eukarya and Bacteria. In case of phosphopantetheine adenylyltransferase (PPAT) (EC 2.7.7.3), the putative archaeal enzyme exhibits significant sequence similarity only with its eukaryotic homologs, an unusual situation for a protein involved in a central metabolic pathway. We have overexpressed in Escherichia coli, purified, and characterized this putative PPAT from the hyperthermophilic archaeon Pyrococcus abyssi (PAB0944). Matrix-assisted laser desorption ionization-time of flight mass spectrometry and high performance liquid chromatography measurements are consistent with the presence of a dephospho-CoA (dPCoA) molecule tightly bound to the polypeptide. The protein indeed catalyzes the synthesis of dPCoA from 4'-phosphopantetheine and ATP, as well as the reverse reaction. The presence of dPCoA stabilizes PAB0944, as it induces a shift from 76 to 82 degrees C of the apparent Tm measured by differential scanning microcalorimetry. Potassium glutamate was found to stabilize the protein at 400 mm. The enzyme behaves as a monomeric protein. Although only distantly related, secondary structure prediction indicates that archaeal and eukaryal PPAT belong to the same nucleotidyltransferase superfamily of bacterial PPAT. The existence of operational proteins highly conserved between Archaea and Eukarya involved in a central metabolic pathway challenge evolutionary scenarios in which eukaryal operational proteins are strictly of bacterial origin.
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Affiliation(s)
- Jean Armengaud
- CEA VALRHO, DSV-DIEP, SBTN, Service de Biochimie post-génomique and Toxicologie Nucléaire, 30207 Bagnols-sur-Cèze, France.
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