1
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Sauge-Merle S, Recuerda M, Beccia MR, Lemaire D, Cherif R, Bremond N, Merola F, Bousmah Y, Berthomieu C. Development of an Efficient FRET-Based Ratiometric Uranium Biosensor. BIOSENSORS 2023; 13:bios13050561. [PMID: 37232922 DOI: 10.3390/bios13050561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 05/12/2023] [Accepted: 05/15/2023] [Indexed: 05/27/2023]
Abstract
The dispersion of uranium in the environment can pose a problem for the health of humans and other living organisms. It is therefore important to monitor the bioavailable and hence toxic fraction of uranium in the environment, but no efficient measurement methods exist for this. Our study aims to fill this gap by developing a genetically encoded FRET-based ratiometric uranium biosensor. This biosensor was constructed by grafting two fluorescent proteins to both ends of calmodulin, a protein that binds four calcium ions. By modifying the metal-binding sites and the fluorescent proteins, several versions of the biosensor were generated and characterized in vitro. The best combination results in a biosensor that is affine and selective for uranium compared to metals such as calcium or other environmental compounds (sodium, magnesium, chlorine). It has a good dynamic range and should be robust to environmental conditions. In addition, its detection limit is below the uranium limit concentration in drinking water defined by the World Health Organization. This genetically encoded biosensor is a promising tool to develop a uranium whole-cell biosensor. This would make it possible to monitor the bioavailable fraction of uranium in the environment, even in calcium-rich waters.
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Affiliation(s)
- Sandrine Sauge-Merle
- Aix Marseille Université, CEA, CNRS, BIAM, UMR7265, IPM, 13108 Saint Paul-Lez-Durance, France
| | - Morgane Recuerda
- Aix Marseille Université, CEA, CNRS, BIAM, UMR7265, IPM, 13108 Saint Paul-Lez-Durance, France
| | - Maria Rosa Beccia
- Université Côte d'Azur, CNRS, Institut de Chimie de Nice, UMR 7272, 06108 Nice, France
| | - David Lemaire
- Aix Marseille Université, CEA, CNRS, BIAM, UMR7265, IPM, 13108 Saint Paul-Lez-Durance, France
| | - Rym Cherif
- Aix Marseille Université, CEA, CNRS, BIAM, UMR7265, IPM, 13108 Saint Paul-Lez-Durance, France
| | - Nicolas Bremond
- Aix Marseille Université, CEA, CNRS, BIAM, UMR7265, IPM, 13108 Saint Paul-Lez-Durance, France
| | - Fabienne Merola
- Université Paris-Saclay, CNRS, Institut de Chimie Physique, 91405 Orsay, France
| | - Yasmina Bousmah
- Université Paris-Saclay, CNRS, Institut de Chimie Physique, 91405 Orsay, France
| | - Catherine Berthomieu
- Aix Marseille Université, CEA, CNRS, BIAM, UMR7265, IPM, 13108 Saint Paul-Lez-Durance, France
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2
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Daronnat L, Holfeltz V, Boubals N, Dumas T, Guilbaud P, Martinez DM, Moisy P, Sauge-Merle S, Lemaire D, Solari PL, Berthon L, Berthomieu C. Investigation of the Plutonium(IV) Interactions with Two Variants of the EF-Hand Ca-Binding Site I of Calmodulin. Inorg Chem 2023; 62:8334-8346. [PMID: 37184364 DOI: 10.1021/acs.inorgchem.3c00845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Due to its presence in the nuclear industry and its strong radiotoxicity, plutonium is an actinide of major interest in the event of internal contamination. To improve the understanding of its mechanisms of transport and accumulation in the body, the complexation of Pu(IV) to the most common protein calcium-binding motif found in cells, the EF-hand motif of calmodulin, was investigated. Visible and X-ray absorption spectroscopies (XAS) in solution made it possible to investigate the speciation of plutonium at physiological pH (pH 7.4) and pH 6 in two variants of the calmodulin Ca-binding site I and using Pu(IV) in different media: carbonate, chloride, or nitrate solutions. Three different species of Pu were identified in the samples, with formation of 1:1 Pu(IV):calmodulin peptide complexes, Pu(IV) reduction, and formation of peptide-mediated Pu(IV) hexanuclear cluster.
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Affiliation(s)
- Loïc Daronnat
- CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, Bagnols-sur-cèze 30200, France
| | - Vanessa Holfeltz
- CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, Bagnols-sur-cèze 30200, France
| | - Nathalie Boubals
- CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, Bagnols-sur-cèze 30200, France
| | - Thomas Dumas
- CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, Bagnols-sur-cèze 30200, France
| | - Philippe Guilbaud
- CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, Bagnols-sur-cèze 30200, France
| | | | - Philippe Moisy
- CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, Bagnols-sur-cèze 30200, France
| | - Sandrine Sauge-Merle
- Aix Marseille Université, CEA, CNRS, BIAM, UMR7265, IPM, Saint Paul-Lez-Durance 13108, France
| | - David Lemaire
- Aix Marseille Université, CEA, CNRS, BIAM, UMR7265, IPM, Saint Paul-Lez-Durance 13108, France
| | - Pier Lorenzo Solari
- Synchrotron SOLEIL, L'Orme des Merisiers, Départementale 128, Saint Aubin 91190, France
| | - Laurence Berthon
- CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, Bagnols-sur-cèze 30200, France
| | - Catherine Berthomieu
- Aix Marseille Université, CEA, CNRS, BIAM, UMR7265, IPM, Saint Paul-Lez-Durance 13108, France
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3
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Platts JA, Tolbatov I. Simulation of Uranyl-Biomolecule Interaction using a Cationic Dummy Atom Model. Chem Phys Lett 2023. [DOI: 10.1016/j.cplett.2023.140479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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4
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Vallet A, Martin-Laffon J, Favier A, Revel B, Bonnot T, Vidaud C, Armengaud J, Gaillard JC, Delangle P, Devime F, Figuet S, Serre NBC, Erba EB, Brutscher B, Ravanel S, Bourguignon J, Alban C. The plasma membrane-associated cation-binding protein PCaP1 of Arabidopsis thaliana is a uranyl-binding protein. JOURNAL OF HAZARDOUS MATERIALS 2023; 446:130668. [PMID: 36608581 DOI: 10.1016/j.jhazmat.2022.130668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 12/14/2022] [Accepted: 12/23/2022] [Indexed: 06/17/2023]
Abstract
Uranium (U) is a naturally-occurring radionuclide that is toxic to living organisms. Given that proteins are primary targets of U(VI), their identification is an essential step towards understanding the mechanisms of radionuclide toxicity, and possibly detoxification. Here, we implemented a chromatographic strategy including immobilized metal affinity chromatography to trap protein targets of uranyl in Arabidopsis thaliana. This procedure allowed the identification of 38 uranyl-binding proteins (UraBPs) from root and shoot extracts. Among them, UraBP25, previously identified as plasma membrane-associated cation-binding protein 1 (PCaP1), was further characterized as a protein interacting in vitro with U(VI) and other metals using spectroscopic and structural approaches, and in planta through analyses of the fate of U(VI) in Arabidopsis lines with altered PCaP1 gene expression. Our results showed that recombinant PCaP1 binds U(VI) in vitro with affinity in the nM range, as well as Cu(II) and Fe(III) in high proportions, and that Ca(II) competes with U(VI) for binding. U(VI) induces PCaP1 oligomerization through binding at the monomer interface, at both the N-terminal structured domain and the C-terminal flexible region. Finally, U(VI) translocation in Arabidopsis shoots was affected in pcap1 null-mutant, suggesting a role for this protein in ion trafficking in planta.
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Affiliation(s)
- Alicia Vallet
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, IBS, 38000 Grenoble, France
| | | | - Adrien Favier
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, IBS, 38000 Grenoble, France
| | - Benoît Revel
- Univ. Grenoble Alpes, CNRS, CEA, INRAE, IRIG, LPCV, 38000 Grenoble, France
| | - Titouan Bonnot
- Univ. Grenoble Alpes, CNRS, CEA, INRAE, IRIG, LPCV, 38000 Grenoble, France
| | - Claude Vidaud
- BIAM, CEA, CNRS, Univ. Aix-Marseille, 13108 Saint-Paul-lez-Durance, France
| | - Jean Armengaud
- Département Médicaments et Technologies pour la Santé (DMTS), Université Paris-Saclay, CEA, INRAE, SPI, F-F-30200 Bagnols-sur-Cèze, France
| | - Jean-Charles Gaillard
- Département Médicaments et Technologies pour la Santé (DMTS), Université Paris-Saclay, CEA, INRAE, SPI, F-F-30200 Bagnols-sur-Cèze, France
| | - Pascale Delangle
- Univ. Grenoble Alpes, CEA, CNRS, GRE-INP, IRIG, SyMMES, 38000 Grenoble, France
| | - Fabienne Devime
- Univ. Grenoble Alpes, CNRS, CEA, INRAE, IRIG, LPCV, 38000 Grenoble, France
| | - Sylvie Figuet
- Univ. Grenoble Alpes, CNRS, CEA, INRAE, IRIG, LPCV, 38000 Grenoble, France
| | - Nelson B C Serre
- Univ. Grenoble Alpes, CNRS, CEA, INRAE, IRIG, LPCV, 38000 Grenoble, France
| | | | | | - Stéphane Ravanel
- Univ. Grenoble Alpes, CNRS, CEA, INRAE, IRIG, LPCV, 38000 Grenoble, France
| | | | - Claude Alban
- Univ. Grenoble Alpes, CNRS, CEA, INRAE, IRIG, LPCV, 38000 Grenoble, France.
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5
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Abou-Zeid L, Pell A, Garcia Cortes M, Isnard H, Delangle P, Bresson C. Determination of the affinity of biomimetic peptides for uranium through the simultaneous coupling of HILIC to ESI-MS and ICP-MS. Anal Chim Acta 2023; 1242:340773. [PMID: 36657886 DOI: 10.1016/j.aca.2022.340773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 12/17/2022] [Accepted: 12/30/2022] [Indexed: 01/01/2023]
Abstract
Several proteins have been identified in the past decades as targets of uranyl (UO22+) in vivo. However, the molecular interactions responsible for this affinity are still poorly known which requires the identification of the UO22+ coordination sites in these proteins. Biomimetic peptides are efficient chemical tools to characterize these sites. In this work, we developed a dedicated analytical method to determine the affinity of biomimetic, synthetic, multi-phosphorylated peptides for UO22+ and evaluate the effect of several structural parameters of these peptides on this affinity at physiological pH. The analytical strategy was based on the implementation of the simultaneous coupling of hydrophilic interaction chromatography (HILIC) with electrospray ionization mass spectrometry (ESI-MS) and inductively coupled plasma mass spectrometry (ICP-MS). An essential step had been devoted to the definition of the best separation conditions of UO22+ complexes formed with di-phosphorylated peptide isomers and also with peptides of different structure and degrees of phosphorylation. We performed the first separations of several sets of UO22+ complexes by HILIC ever reported in the literature. A dedicated method had then been developed for identifying the separated peptide complexes online by ESI-MS and simultaneously quantifying them by ICP-MS, based on uranium quantification using external calibration. Thus, the affinity of the peptides for UO22+ was determined and made it possible to demonstrate that (i) the increasing number of phosphorylated residues (pSer) promotes the affinity of the peptides for UO22+, (ii) the position of the pSer in the peptide backbone has very low impact on this affinity (iii) and finally the cyclic structure of the peptide favors the UO22+ complexation in comparison with the linear structure. These results are in agreement with those previously obtained by spectroscopic techniques, which allowed to validate the method. Through this approach, we obtained essential information to better understand the mechanisms of toxicity of UO22+ at the molecular level and to further develop selective decorporating agents by chelation.
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Affiliation(s)
- Lana Abou-Zeid
- Université Paris-Saclay, CEA, Service d'Etudes Analytiques et de Réactivité des Surfaces, F-91191, Gif-sur-Yvette, France; Sorbonne Université, UPMC, F-75005, Paris, France
| | - Albert Pell
- Université Paris-Saclay, CEA, Service d'Etudes Analytiques et de Réactivité des Surfaces, F-91191, Gif-sur-Yvette, France
| | - Marta Garcia Cortes
- Université Paris-Saclay, CEA, Service d'Etudes Analytiques et de Réactivité des Surfaces, F-91191, Gif-sur-Yvette, France
| | - Hélène Isnard
- Université Paris-Saclay, CEA, Service d'Etudes Analytiques et de Réactivité des Surfaces, F-91191, Gif-sur-Yvette, France
| | - Pascale Delangle
- Univ. Grenoble Alpes, CEA, CNRS, GRE-INP, IRIG, SyMMES, 38 000, Grenoble, France
| | - Carole Bresson
- Université Paris-Saclay, CEA, Service d'Etudes Analytiques et de Réactivité des Surfaces, F-91191, Gif-sur-Yvette, France.
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6
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Pardoux R, Sauge-Merle S, Bremond N, Beccia MR, Lemaire D, Battesti C, Delangle P, Solari PL, Guilbaud P, Berthomieu C. Optimized Coordination of Uranyl in Engineered Calmodulin Site 1 Provides a Subnanomolar Affinity for Uranyl and a Strong Uranyl versus Calcium Selectivity. Inorg Chem 2022; 61:20480-20492. [DOI: 10.1021/acs.inorgchem.2c03185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Romain Pardoux
- Aix Marseille Univ, CEA, CNRS, UMR 7265, BIAM, Interactions Protéine Métal, 13108Saint Paul-Lez-Durance, France
| | - Sandrine Sauge-Merle
- Aix Marseille Univ, CEA, CNRS, UMR 7265, BIAM, Interactions Protéine Métal, 13108Saint Paul-Lez-Durance, France
| | - Nicolas Bremond
- Aix Marseille Univ, CEA, CNRS, UMR 7265, BIAM, Interactions Protéine Métal, 13108Saint Paul-Lez-Durance, France
| | - Maria Rosa Beccia
- Aix Marseille Univ, CEA, CNRS, UMR 7265, BIAM, Interactions Protéine Métal, 13108Saint Paul-Lez-Durance, France
| | - David Lemaire
- Aix Marseille Univ, CEA, CNRS, UMR 7265, BIAM, Interactions Protéine Métal, 13108Saint Paul-Lez-Durance, France
| | - Christine Battesti
- Aix Marseille Univ, CEA, CNRS, UMR 7265, BIAM, Interactions Protéine Métal, 13108Saint Paul-Lez-Durance, France
| | - Pascale Delangle
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG, SyMMES, 38000Grenoble, France
| | - Pier Lorenzo Solari
- MARS beamline, Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, 91192Gif-sur-Yvette Cedex, France
| | | | - Catherine Berthomieu
- Aix Marseille Univ, CEA, CNRS, UMR 7265, BIAM, Interactions Protéine Métal, 13108Saint Paul-Lez-Durance, France
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7
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Inter-Site Cooperativity of Calmodulin N-Terminal Domain and Phosphorylation Synergistically Improve the Affinity and Selectivity for Uranyl. Biomolecules 2022; 12:biom12111703. [DOI: 10.3390/biom12111703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/10/2022] [Accepted: 11/12/2022] [Indexed: 11/19/2022] Open
Abstract
Uranyl–protein interactions participate in uranyl trafficking or toxicity to cells. In addition to their qualitative identification, thermodynamic data are needed to predict predominant mechanisms that they mediate in vivo. We previously showed that uranyl can substitute calcium at the canonical EF-hand binding motif of calmodulin (CaM) site I. Here, we investigate thermodynamic properties of uranyl interaction with site II and with the whole CaM N-terminal domain by spectrofluorimetry and ITC. Site II has an affinity for uranyl about 10 times lower than site I. Uranyl binding at site I is exothermic with a large enthalpic contribution, while for site II, the enthalpic contribution to the Gibbs free energy of binding is about 10 times lower than the entropic term. For the N–terminal domain, macroscopic binding constants for uranyl are two to three orders of magnitude higher than for calcium. A positive cooperative process driven by entropy increases the second uranyl-binding event as compared with the first one, with ΔΔG = −2.0 ± 0.4 kJ mol−1, vs. ΔΔG = −6.1 ± 0.1 kJ mol−1 for calcium. Site I phosphorylation largely increases both site I and site II affinity for uranyl and uranyl-binding cooperativity. Combining site I phosphorylation and site II Thr7Trp mutation leads to picomolar dissociation constants Kd1 = 1.7 ± 0.3 pM and Kd2 = 196 ± 21 pM at pH 7. A structural model obtained by MD simulations suggests a structural role of site I phosphorylation in the affinity modulation.
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8
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Gallois N, Alpha-Bazin B, Bremond N, Ortet P, Barakat M, Piette L, Mohamad Ali A, Lemaire D, Legrand P, Theodorakopoulos N, Floriani M, Février L, Den Auwer C, Arnoux P, Berthomieu C, Armengaud J, Chapon V. Discovery and characterization of UipA, a uranium- and iron-binding PepSY protein involved in uranium tolerance by soil bacteria. THE ISME JOURNAL 2022; 16:705-716. [PMID: 34556817 PMCID: PMC8857325 DOI: 10.1038/s41396-021-01113-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 09/01/2021] [Accepted: 09/08/2021] [Indexed: 02/08/2023]
Abstract
Uranium is a naturally occurring radionuclide. Its redistribution, primarily due to human activities, can have adverse effects on human and non-human biota, which poses environmental concerns. The molecular mechanisms of uranium tolerance and the cellular response induced by uranium exposure in bacteria are not yet fully understood. Here, we carried out a comparative analysis of four actinobacterial strains isolated from metal and radionuclide-rich soils that display contrasted uranium tolerance phenotypes. Comparative proteogenomics showed that uranyl exposure affects 39-47% of the total proteins, with an impact on phosphate and iron metabolisms and membrane proteins. This approach highlighted a protein of unknown function, named UipA, that is specific to the uranium-tolerant strains and that had the highest positive fold-change upon uranium exposure. UipA is a single-pass transmembrane protein and its large C-terminal soluble domain displayed a specific, nanomolar binding affinity for UO22+ and Fe3+. ATR-FTIR and XAS-spectroscopy showed that mono and bidentate carboxylate groups of the protein coordinated both metals. The crystal structure of UipA, solved in its apo state and bound to uranium, revealed a tandem of PepSY domains in a swapped dimer, with a negatively charged face where uranium is bound through a set of conserved residues. This work reveals the importance of UipA and its PepSY domains in metal binding and radionuclide tolerance.
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Affiliation(s)
- Nicolas Gallois
- grid.5399.60000 0001 2176 4817Aix Marseille Université, CEA, CNRS, BIAM, 13108 Saint Paul-Lez-Durance, France
| | - Béatrice Alpha-Bazin
- grid.5583.b0000 0001 2299 8025Département Médicaments et Technologies pour la Santé (DMTS), Université Paris-Saclay, CEA, INRAE, SPI, 30200 Bagnols-sur-Cèze, France
| | - Nicolas Bremond
- grid.5399.60000 0001 2176 4817Aix Marseille Université, CEA, CNRS, BIAM, 13108 Saint Paul-Lez-Durance, France
| | - Philippe Ortet
- grid.5399.60000 0001 2176 4817Aix Marseille Université, CEA, CNRS, BIAM, 13108 Saint Paul-Lez-Durance, France
| | - Mohamed Barakat
- grid.5399.60000 0001 2176 4817Aix Marseille Université, CEA, CNRS, BIAM, 13108 Saint Paul-Lez-Durance, France
| | - Laurie Piette
- grid.5399.60000 0001 2176 4817Aix Marseille Université, CEA, CNRS, BIAM, 13108 Saint Paul-Lez-Durance, France
| | - Abbas Mohamad Ali
- grid.5399.60000 0001 2176 4817Aix Marseille Université, CEA, CNRS, BIAM, 13108 Saint Paul-Lez-Durance, France
| | - David Lemaire
- grid.5399.60000 0001 2176 4817Aix Marseille Université, CEA, CNRS, BIAM, 13108 Saint Paul-Lez-Durance, France
| | - Pierre Legrand
- grid.426328.9Synchrotron SOLEIL. L’Orme des Merisiers Saint-Aubin. BP 48, 91192 Gif-sur-Yvette, France
| | - Nicolas Theodorakopoulos
- grid.5399.60000 0001 2176 4817Aix Marseille Université, CEA, CNRS, BIAM, 13108 Saint Paul-Lez-Durance, France ,grid.418735.c0000 0001 1414 6236IRSN, PSE-ENV/SRTE/LR2T, B.P. 3, 13115 Saint Paul-lez-Durance, Cedex France
| | - Magali Floriani
- grid.418735.c0000 0001 1414 6236IRSN, PSE-ENV/SRTE/LECO, B.P. 3, 13115 Saint Paul-lez-Durance, Cedex France
| | - Laureline Février
- grid.418735.c0000 0001 1414 6236IRSN, PSE-ENV/SRTE/LR2T, B.P. 3, 13115 Saint Paul-lez-Durance, Cedex France
| | - Christophe Den Auwer
- grid.462124.70000 0004 0384 8488Université Côte d’Azur, CNRS, ICN, 06108 Nice, France
| | - Pascal Arnoux
- grid.5399.60000 0001 2176 4817Aix Marseille Université, CEA, CNRS, BIAM, 13108 Saint Paul-Lez-Durance, France
| | - Catherine Berthomieu
- grid.5399.60000 0001 2176 4817Aix Marseille Université, CEA, CNRS, BIAM, 13108 Saint Paul-Lez-Durance, France
| | - Jean Armengaud
- grid.5583.b0000 0001 2299 8025Département Médicaments et Technologies pour la Santé (DMTS), Université Paris-Saclay, CEA, INRAE, SPI, 30200 Bagnols-sur-Cèze, France
| | - Virginie Chapon
- Aix Marseille Université, CEA, CNRS, BIAM, 13108, Saint Paul-Lez-Durance, France.
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9
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Tsushima S, Takao K. Hydrophobic core formation and secondary structure elements in uranyl(VI)-binding peptides. Phys Chem Chem Phys 2022; 24:4455-4461. [PMID: 35113097 DOI: 10.1039/d1cp05401e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Cyclic peptides as well as a modified EF-hand motif of calmodulin have been newly designed to achieve high affinity towards uranyl(VI). Cyclic peptides may be engineered to bind uranyl(VI) to its backbone under acidic conditions, which may enhance its selectivity. For the modified EF-hand motif of calmodulin, strong electrostatic interactions between uranyl(VI) and negatively charged side chains play an important role in achieving high affinity; however, it is also essential to have a secondary structure element and formation of hydrophobic cores in the metal-bound state of the peptide.
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Affiliation(s)
- Satoru Tsushima
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), 01328, Dresden, Germany. .,World Research Hub Initiative (WRHI), Institute of Innovative Research, Tokyo Institute of Technology, 152-8550 Tokyo, Japan
| | - Koichiro Takao
- Laboratory for Zero-Carbon Energy, Institute of Innovative Research, Tokyo Institute of Technology, 152-8550 Tokyo, Japan
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10
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Gutenthaler SM, Tsushima S, Steudtner R, Gailer M, Hoffmann-Röder A, Drobot B, Daumann LJ. Lanmodulin peptides – unravelling the binding of the EF-Hand loop sequences stripped from the structural corset. Inorg Chem Front 2022; 9:4009-4021. [PMID: 36091973 PMCID: PMC9362731 DOI: 10.1039/d2qi00933a] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 05/23/2022] [Indexed: 12/25/2022]
Abstract
Lanmodulin (LanM), a naturally lanthanide (Ln)-binding protein with a remarkable selectivity for Lns over Ca(ii) and affinities in the picomolar range, is an attractive target to address challenges in Ln separation. Why LanM has such a high selectivity is currently not entirely understood; both specific amino acid sequences of the EF-Hand loops and cooperativity effects have been suggested. Here, we removed the effect of cooperativity and synthesised all four 12-amino acid EF-Hand loop peptides, and investigated their affinity for two Lns (Eu(iii) and Tb(iii)), the actinide Cm(iii) and Ca(ii). Using isothermal titration calorimetry and time-resolved laser fluorescence spectroscopy (TRLFS) combined with parallel factor analysis, we show that the four short peptides behave very similarly, having affinities in the micromolar range for Eu(iii) and Tb(iii). Ca(ii) was shown not to bind to the peptides, which was verified with circular dichroism spectroscopy. This technique also revealed an increase in structural organisation upon Eu(iii) addition, which was supported by molecular dynamics simulations. Lastly, we put Eu(iii) and Cm(iii) in direct competition using TRLFS. Remarkably, a slightly higher affinity for Cm(iii) was found. Our results demonstrate that the picomolar affinities in LanM are largely an effect of pre-structuring and therefore a reduction of flexibility in combination with cooperative effects, and that all EF-Hand loops possess similar affinities when detached from the protein backbone, albeit still retaining the high selectivity for lanthanides and actinides over calcium. Taking a closer look at Lanmodulin’s remarkable selectivity for lanthanides (Ln) over Ca(ii) and high Ln/actinide affinities on the amino acid level by investigating the four binding-loops as peptides with Ca(ii), Eu(iii), Tb(iii) and Cm(iii).![]()
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Affiliation(s)
- Sophie M. Gutenthaler
- Department of Chemistry Ludwig-Maximilians-University Munich Butenandtstraße 5-13, 81377 München, Germany
| | - Satoru Tsushima
- Institute of Resource Ecology Helmholtz-Zentrum Dresden-Rossendorf e.V. Bautzner Landstraße 400, 01328 Dresden, Germany
- International Research Frontiers Initiative, Institute of Innovative Research, Tokyo Institute of Technology, Meguro 152-8550, Tokyo, Japan
| | - Robin Steudtner
- Institute of Resource Ecology Helmholtz-Zentrum Dresden-Rossendorf e.V. Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Manuel Gailer
- Department of Chemistry Ludwig-Maximilians-University Munich Butenandtstraße 5-13, 81377 München, Germany
| | - Anja Hoffmann-Röder
- Department of Chemistry Ludwig-Maximilians-University Munich Butenandtstraße 5-13, 81377 München, Germany
| | - Björn Drobot
- Institute of Resource Ecology Helmholtz-Zentrum Dresden-Rossendorf e.V. Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Lena J. Daumann
- Department of Chemistry Ludwig-Maximilians-University Munich Butenandtstraße 5-13, 81377 München, Germany
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11
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Ye G, Roques J, Solari PL, Den Auwer C, Jeanson A, Brandel J, Charbonnière LJ, Wu W, Simoni É. Structural and Thermodynamics Studies on Polyaminophosphonate Ligands for Uranyl Decorporation. Inorg Chem 2021; 60:2149-2159. [PMID: 33522798 DOI: 10.1021/acs.inorgchem.0c02145] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The development of actinide decorporation agents with high complexation affinity, high tissue specificity, and low biological toxicity is of vital importance for the sustained and healthy development of nuclear energy. After accidental actinide intake, sequestration by chelation therapy to reduce acute damage is considered as the most effective method. In this work, a series of bis- and tetra-phosphonated pyridine ligands have been designed, synthesized, and characterized for uranyl (UO22+) decorporation. Owing to the absorption of the ligand and the luminescence of the uranyl ion, UV-vis spectroscopy and time-resolved laser-induced fluorescence spectroscopy (TRLFS) were used to probe in situ complexation and structure variation of the complexes formed by the ligands with uranyl. Density functional theory (DFT) calculations and X-ray absorption fine structure (XAFS) spectroscopy on uranyl-ligand complexes revealed the coordination geometry around the uranyl center at pH 3 and 7.4. High affinity constants (log K ∼17) toward the uranyl ion were determined by displacement titration. A preliminary in vitro chelation study proves that bis-phosphonated pyridine ligands can remove uranium from calmodulin (CaM) at a low dose and in the short term, which supports further uranyl decorporation applications of these ligands.
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Affiliation(s)
- Gaoyang Ye
- IJCLab CNRS-IN2P3, Université Paris-Saclay, 91405 Orsay, France.,Institute of Nuclear and New Energy Technology, Tsinghua University, 100084 Beijing, China
| | - Jérome Roques
- IJCLab CNRS-IN2P3, Université Paris-Saclay, 91405 Orsay, France
| | | | | | | | - Jérémy Brandel
- IPHC, UMR 7178, Université de Strasbourg/CNRS, F-67000 Strasbourg, France
| | | | - Wangsuo Wu
- Radiochemistry Laboratory, Lanzhou University, 730000 Lanzhou, Gansu, China
| | - Éric Simoni
- IJCLab CNRS-IN2P3, Université Paris-Saclay, 91405 Orsay, France
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12
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Lin YW. Uranyl Binding to Proteins and Structural-Functional Impacts. Biomolecules 2020; 10:biom10030457. [PMID: 32187982 PMCID: PMC7175365 DOI: 10.3390/biom10030457] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 03/08/2020] [Accepted: 03/13/2020] [Indexed: 01/29/2023] Open
Abstract
The widespread use of uranium for civilian purposes causes a worldwide concern of its threat to human health due to the long-lived radioactivity of uranium and the high toxicity of uranyl ion (UO22+). Although uranyl–protein/DNA interactions have been known for decades, fewer advances are made in understanding their structural-functional impacts. Instead of focusing only on the structural information, this article aims to review the recent advances in understanding the binding of uranyl to proteins in either potential, native, or artificial metal-binding sites, and the structural-functional impacts of uranyl–protein interactions, such as inducing conformational changes and disrupting protein-protein/DNA/ligand interactions. Photo-induced protein/DNA cleavages, as well as other impacts, are also highlighted. These advances shed light on the structure-function relationship of proteins, especially for metalloproteins, as impacted by uranyl–protein interactions. It is desired to seek approaches for biological remediation of uranyl ions, and ultimately make a full use of the double-edged sword of uranium.
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Affiliation(s)
- Ying-Wu Lin
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China; ; Tel.: +86-734-8578079
- Laboratory of Protein Structure and Function, University of South China, Hengyang 421001, China
- Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang 421001, China
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13
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Interactions of phosphorylated cyclohexapeptides with uranyl: insights from experiments and theoretical calculations. J Radioanal Nucl Chem 2019. [DOI: 10.1007/s10967-019-06697-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Creff G, Zurita C, Jeanson A, Carle G, Vidaud C, Den Auwer C. What do we know about actinides-proteins interactions? RADIOCHIM ACTA 2019. [DOI: 10.1515/ract-2019-3120] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Abstract
Since the early 40s when the first research related to the development of the atomic bomb began for the Manhattan Project, actinides (An) and their association with the use of nuclear energy for civil applications, such as in the generation of electricity, have been a constant source of interest and fear. In 1962, the first Society of Toxicology (SOT), led by H. Hodge, was established at the University of Rochester (USA). It was commissioned as part of the Manhattan Project to assess the impact of nuclear weapons production on workers’ health. As a result of this initiative, the retention and excretion rates of radioactive heavy metals, their physiological impact in the event of acute exposure and their main biological targets were assessed. In this context, the scientific community began to focus on the role of proteins in the transportation and in vivo accumulation of An. The first studies focused on the identification of these proteins. Thereafter, the continuous development of physico-chemical characterization techniques has made it possible to go further and specify the modes of interaction with proteins from both a thermodynamic and structural point of view, as well as from the point of view of their biological activity. This article reviews the work performed in this area since the Manhattan Project. It is divided into three parts: first, the identification of the most affine proteins; second, the study of the affinity and structure of protein-An complexes; and third, the impact of actinide ligation on protein conformation and function.
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Affiliation(s)
- Gaëlle Creff
- Université Côte d’Azur, CNRS, UMR 7272, Institut de Chimie de Nice , 06108 Nice , France
| | - Cyril Zurita
- Université Côte d’Azur, CNRS, UMR 7272, Institut de Chimie de Nice , 06108 Nice , France
| | - Aurélie Jeanson
- Université Côte d’Azur, CNRS, UMR 7272, Institut de Chimie de Nice , 06108 Nice , France
| | - Georges Carle
- Université Côte d’Azur, CEA, UMR E-4320 TIRO-MATOs , 06100 Nice , France
| | - Claude Vidaud
- CEA DRF, CNRS, UMR 7265, Institut de Biosciences et Biotechnologies d’Aix-Marseille , 13108 Saint-Paul-lez-Durance , France
| | - Christophe Den Auwer
- Université Côte d’Azur, CNRS, UMR 7272, Institut de Chimie de Nice , 06108 Nice , France
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15
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Götzke L, Schaper G, März J, Kaden P, Huittinen N, Stumpf T, Kammerlander KK, Brunner E, Hahn P, Mehnert A, Kersting B, Henle T, Lindoy LF, Zanoni G, Weigand JJ. Coordination chemistry of f-block metal ions with ligands bearing bio-relevant functional groups. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.01.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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16
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Zänker H, Heine K, Weiss S, Brendler V, Husar R, Bernhard G, Gloe K, Henle T, Barkleit A. Strong Uranium(VI) Binding onto Bovine Milk Proteins, Selected Protein Sequences, and Model Peptides. Inorg Chem 2019; 58:4173-4189. [PMID: 30860361 DOI: 10.1021/acs.inorgchem.8b03231] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Hexavalent uranium is ubiquitous in the environment. In view of the chemical and radiochemical toxicity of uranium(VI), a good knowledge of its possible interactions in the environment is crucial. The aim of this work was to identify typical binding and sorption characteristics of uranium(VI) with both the pure bovine milk protein β-casein and diverse related protein mixtures (caseins, whey proteins). For comparison, selected model peptides representing the amino acid sequence 13-16 of β-casein and dephosphorylated β-casein were also studied. Complexation studies using potentiometric titration and time-resolved laser-induced fluorescence spectroscopy revealed that the phosphoryl-containing proteins form uranium(VI) complexes of higher stability than the structure-analog phosphoryl-free proteins. That is in agreement with the sorption experiments showing a significantly higher affinity of caseins toward uranium(VI) in comparison to whey proteins. On the other hand, the total sorption capacity of caseins is lower than that of whey proteins. The discussed binding behavior of milk proteins to uranium(VI) might open up interesting perspectives for sustainable techniques of uranium(VI) removal from aqueous solutions. This was further demonstrated by batch experiments on the removal of uranium(VI) from mineral water samples.
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Affiliation(s)
- Harald Zänker
- Institute of Resource Ecology , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstraße 400 , 01328 Dresden , Germany
| | - Katja Heine
- Institute of Resource Ecology , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstraße 400 , 01328 Dresden , Germany.,Faculty of Chemistry and Food Chemistry , Technische Universität Dresden , 01062 Dresden , Germany
| | - Stephan Weiss
- Institute of Resource Ecology , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstraße 400 , 01328 Dresden , Germany
| | - Vinzenz Brendler
- Institute of Resource Ecology , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstraße 400 , 01328 Dresden , Germany
| | - Richard Husar
- Institute of Resource Ecology , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstraße 400 , 01328 Dresden , Germany
| | - Gert Bernhard
- Institute of Resource Ecology , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstraße 400 , 01328 Dresden , Germany
| | - Karsten Gloe
- Faculty of Chemistry and Food Chemistry , Technische Universität Dresden , 01062 Dresden , Germany
| | - Thomas Henle
- Faculty of Chemistry and Food Chemistry , Technische Universität Dresden , 01062 Dresden , Germany
| | - Astrid Barkleit
- Institute of Resource Ecology , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstraße 400 , 01328 Dresden , Germany
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17
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The multifunctional role of phospho-calmodulin in pathophysiological processes. Biochem J 2018; 475:4011-4023. [PMID: 30578290 PMCID: PMC6305829 DOI: 10.1042/bcj20180755] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 11/23/2018] [Accepted: 11/30/2018] [Indexed: 02/06/2023]
Abstract
Calmodulin (CaM) is a versatile Ca2+-sensor/transducer protein that modulates hundreds of enzymes, channels, transport systems, transcription factors, adaptors and other structural proteins, controlling in this manner multiple cellular functions. In addition to its capacity to regulate target proteins in a Ca2+-dependent and Ca2+-independent manner, the posttranslational phosphorylation of CaM by diverse Ser/Thr- and Tyr-protein kinases has been recognized as an important additional manner to regulate this protein by fine-tuning its functionality. In this review, we shall cover developments done in recent years in which phospho-CaM has been implicated in signalling pathways that are relevant for the onset and progression of diverse pathophysiological processes. These include diverse systems playing a major role in carcinogenesis and tumour development, prion-induced encephalopathies and brain hypoxia, melatonin-regulated neuroendocrine disorders, hypertension, and heavy metal-induced cell toxicity.
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18
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Carugo O. Structural features of uranium-protein complexes. J Inorg Biochem 2018; 189:1-6. [PMID: 30149122 DOI: 10.1016/j.jinorgbio.2018.08.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 06/19/2018] [Accepted: 08/16/2018] [Indexed: 02/06/2023]
Abstract
Uranium toxicity depends on its chemical properties rather than on its radioactivity and involves its interaction with macromolecules. Here, a systematic survey of the structural features of the uranyl sites observed in protein crystal structures deposited in the Protein Data Bank is reported. Beside the two uranyl oxygens, which occupy the axial positions, uranium tends to be coordinated by five other oxygen atoms, which occupy the equatorial vertices of a pentagonal bipyramid. Even if one or more of these equatorial positions are sometime empty, they can be occupied only by oxygen atoms that belong to the carboxylate groups of Glu and Asp side-chains, usually acting as monodentate ligands, to water molecules, or to acetate anions. Although several uranium sites appear undefined or unrefined, with a single uranium atom that lacks the two uranyl oxygen atoms, this problem seems to become less frequent in recent years. However, it is clear that the crystallographic refinements of the uranyl sites are not always well restrained and a better parametrization of these restraints seems to be necessary.
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Affiliation(s)
- Oliviero Carugo
- Chemistry Department, University of Pavia, Italy; Department of Structural and Computational Biology, University of Vienna, Austria.
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