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Bouraguba M, Schmitt AM, Suseela YV, Vileno B, Melin F, Glattard E, Orvain C, Lebrun V, Raibaut L, Ilbert M, Bechinger B, Hellwig P, Gaiddon C, Sour A, Faller P. Quest for a stable Cu-ligand complex with a high catalytic activity to produce ROS. Metallomics 2024:mfae020. [PMID: 38614957 DOI: 10.1093/mtomcs/mfae020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/15/2024]
Abstract
Metal ion-catalysed overproduction of reactive oxygen species (ROS) are believed to contribute significantly to oxidative stress and be involved in several biological processes, from immune defence to development of diseases. Among the essential metal ions, copper is one of the most efficient catalysts in ROS production in the presence of O2 and a physiological reducing agent such as ascorbate. To control this chemistry, Cu ions are tightly coordinated to biomolecules. Free or loosely bound Cu ions are generally avoided to prevent their toxicity. In the present report, we aim to find stable Cu-ligand complexes (Cu-L) that can catalyse efficiently the production of ROS in presence of ascorbate under aerobic conditions. Thermodynamic stability would be needed to avoid dissociation in biological environment and high ROS catalysis is of interest for applications as in antimicrobial or anticancer agents. A series of Cu complexes with the well-known tripodal and tetradentate ligands containing a central amine linked to three pyridyl-alkyl arms of different lengths were investigated. The two of them with mixed armlength showed higher catalytic activity in oxidation of ascorbate and subsequent ROS production than Cu salts in buffer, which is an unprecedented result. Despite these high catalytic activities, no increased antimicrobial activity towards E. coli or cytotoxicity against eukaryotic AGS cells in culture related to Cu-L based ROS production could be observed. The potential reasons for discrepancy between in vitro and in cell data will be discussed.
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Affiliation(s)
- Merwan Bouraguba
- Institut de Chimie, UMR 7177, Université́ de Strasbourg, CNRS, 4 Rue Blaise Pascal, 67000, Strasbourg, France
| | - Adeline M Schmitt
- Institut de Chimie, UMR 7177, Université́ de Strasbourg, CNRS, 4 Rue Blaise Pascal, 67000, Strasbourg, France
| | - Yelisetty Venkata Suseela
- Institut de Chimie, UMR 7177, Université́ de Strasbourg, CNRS, 4 Rue Blaise Pascal, 67000, Strasbourg, France
| | - Bertrand Vileno
- Institut de Chimie, UMR 7177, Université́ de Strasbourg, CNRS, 4 Rue Blaise Pascal, 67000, Strasbourg, France
| | - Frédéric Melin
- Laboratoire de Bioélectrochimie et Spectroscopie, UMR 7140, CNRS, Université de Strasbourg, 4 Rue Blaise Pascal, 67000 Strasbourg, France
| | - Elise Glattard
- Institut de Chimie, UMR 7177, Université́ de Strasbourg, CNRS, 4 Rue Blaise Pascal, 67000, Strasbourg, France
| | - Christophe Orvain
- Inserm UMR_S 1113, Université de Strasbourg, 3 avenue Molière, 67200, Strasbourg, France
| | - Vincent Lebrun
- Institut de Chimie, UMR 7177, Université́ de Strasbourg, CNRS, 4 Rue Blaise Pascal, 67000, Strasbourg, France
| | - Laurent Raibaut
- Institut de Chimie, UMR 7177, Université́ de Strasbourg, CNRS, 4 Rue Blaise Pascal, 67000, Strasbourg, France
| | - Marianne Ilbert
- Aix-Marseille Université, CNRS, BIP, UMR 7281, IMM, Marseille, France
| | - Burkhard Bechinger
- Institut de Chimie, UMR 7177, Université́ de Strasbourg, CNRS, 4 Rue Blaise Pascal, 67000, Strasbourg, France
- Institut Universitaire de France (IUF), 1 rue Descartes, 75231 Paris, France
| | - Petra Hellwig
- Laboratoire de Bioélectrochimie et Spectroscopie, UMR 7140, CNRS, Université de Strasbourg, 4 Rue Blaise Pascal, 67000 Strasbourg, France
- Institut Universitaire de France (IUF), 1 rue Descartes, 75231 Paris, France
| | - Christian Gaiddon
- Inserm UMR_S 1113, Université de Strasbourg, 3 avenue Molière, 67200, Strasbourg, France
| | - Angélique Sour
- Institut de Chimie, UMR 7177, Université́ de Strasbourg, CNRS, 4 Rue Blaise Pascal, 67000, Strasbourg, France
| | - Peter Faller
- Institut de Chimie, UMR 7177, Université́ de Strasbourg, CNRS, 4 Rue Blaise Pascal, 67000, Strasbourg, France
- Institut Universitaire de France (IUF), 1 rue Descartes, 75231 Paris, France
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Roger M, Leone P, Blackburn NJ, Horrell S, Chicano TM, Biaso F, Giudici-Orticoni MT, Abriata LA, Hura GL, Hough MA, Sciara G, Ilbert M. Beyond the coupled distortion model: structural analysis of the single domain cupredoxin AcoP, a green mononuclear copper centre with original features. Dalton Trans 2024; 53:1794-1808. [PMID: 38170898 PMCID: PMC10804444 DOI: 10.1039/d3dt03372d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 11/30/2023] [Indexed: 01/05/2024]
Abstract
Cupredoxins are widely occurring copper-binding proteins with a typical Greek-key beta barrel fold. They are generally described as electron carriers that rely on a T1 copper centre coordinated by four ligands provided by the folded polypeptide. The discovery of novel cupredoxins demonstrates the high diversity of this family, with variations in terms of copper-binding ligands, copper centre geometry, redox potential, as well as biological function. AcoP is a periplasmic cupredoxin belonging to the iron respiratory chain of the acidophilic bacterium Acidithiobacillus ferrooxidans. AcoP presents original features, including high resistance to acidic pH and a constrained green-type copper centre of high redox potential. To understand the unique properties of AcoP, we undertook structural and biophysical characterization of wild-type AcoP and of two Cu-ligand mutants (H166A and M171A). The crystallographic structures, including native reduced AcoP at 1.65 Å resolution, unveil a typical cupredoxin fold. The presence of extended loops, never observed in previously characterized cupredoxins, might account for the interaction of AcoP with physiological partners. The Cu-ligand distances, determined by both X-ray diffraction and EXAFS, show that the AcoP metal centre seems to present both T1 and T1.5 features, in turn suggesting that AcoP might not fit well to the coupled distortion model. The crystal structures of two AcoP mutants confirm that the active centre of AcoP is highly constrained. Comparative analysis with other cupredoxins of known structures, suggests that in AcoP the second coordination sphere might be an important determinant of active centre rigidity due to the presence of an extensive hydrogen bond network. Finally, we show that other cupredoxins do not perfectly follow the coupled distortion model as well, raising the suspicion that further alternative models to describe copper centre geometries need to be developed, while the importance of rack-induced contributions should not be underestimated.
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Affiliation(s)
- Magali Roger
- CNRS, Aix-Marseille University, Bioenergetic and Protein Engineering Laboratory, BIP UMR 7281, Mediterranean Institute of Microbiology, 13009 Marseille, France.
| | - Philippe Leone
- CNRS, Aix-Marseille University, Laboratoire d'Ingénierie des Systèmes Macromoléculaires, LISM UMR7255, 13009 Marseille, France
| | - Ninian J Blackburn
- Department of Chemical Physiology and Biochemistry, School of Medicine, Oregon Health and Science University, Portland, Oregon 97239, USA
| | - Sam Horrell
- School of Life Sciences, University of Essex, Wivenhoe Park, Colchester, Essex CO4 3SQ, UK
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, UK
| | - Tadeo Moreno Chicano
- School of Life Sciences, University of Essex, Wivenhoe Park, Colchester, Essex CO4 3SQ, UK
| | - Frédéric Biaso
- CNRS, Aix-Marseille University, Bioenergetic and Protein Engineering Laboratory, BIP UMR 7281, Mediterranean Institute of Microbiology, 13009 Marseille, France.
| | - Marie-Thérèse Giudici-Orticoni
- CNRS, Aix-Marseille University, Bioenergetic and Protein Engineering Laboratory, BIP UMR 7281, Mediterranean Institute of Microbiology, 13009 Marseille, France.
| | - Luciano A Abriata
- Laboratory for Biomolecular Modeling and Protein Purification and Structure Core Facility, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Greg L Hura
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Lab, Berkeley, CA, USA
| | - Michael A Hough
- School of Life Sciences, University of Essex, Wivenhoe Park, Colchester, Essex CO4 3SQ, UK
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, UK
| | - Giuliano Sciara
- CNRS, Aix-Marseille University, Bioenergetic and Protein Engineering Laboratory, BIP UMR 7281, Mediterranean Institute of Microbiology, 13009 Marseille, France.
- Aix Marseille Univ, INRAE, BBF UMR1163, Biodiversité et Biotechnologie Fongiques, 13288 Marseille, France
| | - Marianne Ilbert
- CNRS, Aix-Marseille University, Bioenergetic and Protein Engineering Laboratory, BIP UMR 7281, Mediterranean Institute of Microbiology, 13009 Marseille, France.
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Beauvois SG, Flaugnatti N, Ilbert M, Boyer M, Gavello-Fernandez E, Fronzes R, Jurėnas D, Journet L. The tip protein PAAR is required for the function of the type VI secretion system. Microbiol Spectr 2023; 11:e0147823. [PMID: 37800964 PMCID: PMC10715212 DOI: 10.1128/spectrum.01478-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 08/09/2023] [Indexed: 10/07/2023] Open
Abstract
IMPORTANCE The type VI secretion system (T6SS) is a bacterial contractile injection system involved in bacterial competition by the delivery of antibacterial toxins. The T6SS consists of an envelope-spanning complex that recruits the baseplate, allowing the polymerization of a contractile tail structure. The tail is a tube wrapped by a sheath and topped by the tip of the system, the VgrG spike/PAAR complex. Effectors loaded onto the puncturing tip or into the tube are propelled in the target cells upon sheath contraction. The PAAR protein tips and sharpens the VgrG spike. However, the importance and the function of this protein remain unclear. Here, we provide evidence for association of PAAR at the tip of the VgrG spike. We also found that the PAAR protein is a T6SS critical component required for baseplate and sheath assembly.
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Affiliation(s)
- Solène G. Beauvois
- Laboratoire d’Ingénierie des Systèmes Macromoléculaires, Institut de Microbiologie, Bioénergies et Biotechnologie, Institut de Microbiologie de la Méditerranée, Aix-Marseille Université - CNRS UMR7255, Marseille, France
| | - Nicolas Flaugnatti
- Laboratoire d’Ingénierie des Systèmes Macromoléculaires, Institut de Microbiologie, Bioénergies et Biotechnologie, Institut de Microbiologie de la Méditerranée, Aix-Marseille Université - CNRS UMR7255, Marseille, France
| | - Marianne Ilbert
- Laboratoire de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie, Bioénergies et Biotechnologie, Institut de Microbiologie de la Méditerranée, Aix-Marseille Université - CNRS UMR7281, Marseille, France
| | - Marie Boyer
- Laboratoire d’Ingénierie des Systèmes Macromoléculaires, Institut de Microbiologie, Bioénergies et Biotechnologie, Institut de Microbiologie de la Méditerranée, Aix-Marseille Université - CNRS UMR7255, Marseille, France
| | - Esther Gavello-Fernandez
- Institut Européen de Chimie et Biologie, University of Bordeaux, Pessac, France
- CNRS UMR 5234 Microbiologie Fondamentale et Pathogénicité, Bordeaux, France
| | - Rémi Fronzes
- Institut Européen de Chimie et Biologie, University of Bordeaux, Pessac, France
- CNRS UMR 5234 Microbiologie Fondamentale et Pathogénicité, Bordeaux, France
| | - Dukas Jurėnas
- Laboratoire d’Ingénierie des Systèmes Macromoléculaires, Institut de Microbiologie, Bioénergies et Biotechnologie, Institut de Microbiologie de la Méditerranée, Aix-Marseille Université - CNRS UMR7255, Marseille, France
| | - Laure Journet
- Laboratoire d’Ingénierie des Systèmes Macromoléculaires, Institut de Microbiologie, Bioénergies et Biotechnologie, Institut de Microbiologie de la Méditerranée, Aix-Marseille Université - CNRS UMR7255, Marseille, France
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4
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Weber L, Gilat A, Maillot N, Byrne D, Arnoux P, Giudici-Orticoni MT, Méjean V, Ilbert M, Genest O, Rosenzweig R, Dementin S. Bacterial adaptation to cold: Conservation of a short J-domain co-chaperone and its protein partners in environmental proteobacteria. Environ Microbiol 2023; 25:2447-2464. [PMID: 37549929 DOI: 10.1111/1462-2920.16478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 07/20/2023] [Indexed: 08/09/2023]
Abstract
Bacterial genomes are a huge reservoir of genes encoding J-domain protein co-chaperones that recruit the molecular chaperone DnaK to assist protein substrates involved in survival, adaptation, or fitness. The atc operon of the aquatic mesophilic bacterium Shewanella oneidensis encodes the proteins AtcJ, AtcA, AtcB, and AtcC, and all of them, except AtcA, are required for growth at low temperatures. AtcJ is a short J-domain protein that interacts with DnaK, but also with AtcC through its 21 amino acid C-terminal domain. This interaction network is critical for cold growth. Here, we show that AtcJ represents a subfamily of short J-domain proteins that (i) are found in several environmental, mostly aquatic, β- or ɣ-proteobacteria and (ii) contain a conserved PX7 W motif in their C-terminal extension. Using a combination of NMR, biochemical and genetic approaches, we show that the hydrophobic nature of the tryptophan of the S. oneidensis AtcJ PX7 W motif determines the strong AtcJ-AtcC interaction essential for cold growth. The AtcJ homologues are encoded by operons containing at least the S. oneidensis atcA, atcB, and atcC homologues. These findings suggest a conserved network of DnaK and Atc proteins necessary for low-temperature growth and, given the variation in the atc operons, possibly for other biological functions.
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Affiliation(s)
- Lana Weber
- Laboratory of Bioenergetics and Protein Engineering (BIP UMR 7281), Aix-Marseille University, French National Center for Scientific Research (CNRS), Marseille, France
| | - Atar Gilat
- Department of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Nathanael Maillot
- Laboratory of Bioenergetics and Protein Engineering (BIP UMR 7281), Aix-Marseille University, French National Center for Scientific Research (CNRS), Marseille, France
| | - Deborah Byrne
- Protein Expression Facility, Aix-Marseille University, French National Center for Scientific Research (CNRS), IMM FR3479, Marseille, France
| | - Pascal Arnoux
- Institute of Biosciences and Biotechnologies of Aix-Marseille (BIAM UMR7265), Aix-Marseille University, French Alternative Energies and Atomic Energy Commission (CEA), French National Center for Scientific Research (CNRS), Saint Paul-Lez-Durance, France
| | - Marie-Thérèse Giudici-Orticoni
- Laboratory of Bioenergetics and Protein Engineering (BIP UMR 7281), Aix-Marseille University, French National Center for Scientific Research (CNRS), Marseille, France
| | - Vincent Méjean
- Laboratory of Bioenergetics and Protein Engineering (BIP UMR 7281), Aix-Marseille University, French National Center for Scientific Research (CNRS), Marseille, France
| | - Marianne Ilbert
- Laboratory of Bioenergetics and Protein Engineering (BIP UMR 7281), Aix-Marseille University, French National Center for Scientific Research (CNRS), Marseille, France
| | - Olivier Genest
- Laboratory of Bioenergetics and Protein Engineering (BIP UMR 7281), Aix-Marseille University, French National Center for Scientific Research (CNRS), Marseille, France
| | - Rina Rosenzweig
- Department of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Sébastien Dementin
- Laboratory of Bioenergetics and Protein Engineering (BIP UMR 7281), Aix-Marseille University, French National Center for Scientific Research (CNRS), Marseille, France
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Falcone E, Stellato F, Vileno B, Bouraguba M, Lebrun V, Ilbert M, Morante S, Faller P. Revisiting the pro-oxidant activity of copper: interplay of ascorbate, cysteine and glutathione. Metallomics 2023:mfad040. [PMID: 37353903 DOI: 10.1093/mtomcs/mfad040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/25/2023]
Abstract
Copper (Cu) is essential for most organisms, but it can be poisonous in excess, through mechanisms such as protein aggregation, trans-metallation and oxidative stress. Latter could implicate the formation of potentially harmful Reactive Oxygen Species (ROS: O2•-, H2O2 and HO•) via the redox cycling between Cu(II)/Cu(I) states in the presence of dioxygen and physiological reducing agents such as ascorbate (AscH), cysteine (Cys) and the tripeptide glutathione (GSH). Although the reactivity of Cu with these reductants has been previously investigated, the reactions taking place in a more physiologically-relevant mixture of these biomolecules are not known. Hence, we report here on the reactivity of Cu with binary and ternary mixtures of AscH, Cys and GSH. By measuring ascorbate and thiol oxidation, as well as HO• formation, we show that Cu reacts preferentially with GSH and Cys, halting AscH oxidation and also HO• release. This could be explained by the formation of Cu-thiolate clusters with both GSH and, as we first demonstrate here, Cys. Moreover, we observed a remarkable acceleration of Cu-catalysed GSH oxidation in the presence of Cys. We provide evidence that both thiol-disulfide exchange and the generated H2O2 contribute to this effect. Based on these findings, we speculate that Cu-induced oxidative stress may be mainly driven by GSH depletion and/or protein disulfide formation rather than by HO• and envision a synergistic effect of Cys on Cu toxicity.
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Affiliation(s)
- Enrico Falcone
- Institut de Chimie (UMR 7177), University of Strasbourg - CNRS, 4 Rue Blaise Pascal, 67081 Strasbourg, France
| | - Francesco Stellato
- Università di Roma Tor Vergata, Via della Ricerca Scientifica 1 - 00133 Roma, Italy
- INFN, Sezione di Roma Tor Vergata, Via della Ricerca Scientifica 1 - 00133 Roma, Italy
| | - Bertrand Vileno
- Institut de Chimie (UMR 7177), University of Strasbourg - CNRS, 4 Rue Blaise Pascal, 67081 Strasbourg, France
| | - Merwan Bouraguba
- Institut de Chimie (UMR 7177), University of Strasbourg - CNRS, 4 Rue Blaise Pascal, 67081 Strasbourg, France
| | - Vincent Lebrun
- Institut de Chimie (UMR 7177), University of Strasbourg - CNRS, 4 Rue Blaise Pascal, 67081 Strasbourg, France
| | - Marianne Ilbert
- Aix-Marseille Université, CNRS, BIP, UMR 7281, IMM, 31 Chemin Aiguier, 13009 Marseille, France
| | - Silvia Morante
- Università di Roma Tor Vergata, Via della Ricerca Scientifica 1 - 00133 Roma, Italy
- INFN, Sezione di Roma Tor Vergata, Via della Ricerca Scientifica 1 - 00133 Roma, Italy
| | - Peter Faller
- Institut de Chimie (UMR 7177), University of Strasbourg - CNRS, 4 Rue Blaise Pascal, 67081 Strasbourg, France
- Institut Universitaire de France (IUF), 1 rue Descartes, 75231 Paris, France
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6
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Fassler R, Zuily L, Lahrach N, Ilbert M, Reichmann D. The Central Role of Redox-Regulated Switch Proteins in Bacteria. Front Mol Biosci 2021; 8:706039. [PMID: 34277710 PMCID: PMC8282892 DOI: 10.3389/fmolb.2021.706039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 06/18/2021] [Indexed: 01/11/2023] Open
Abstract
Bacteria possess the ability to adapt to changing environments. To enable this, cells use reversible post-translational modifications on key proteins to modulate their behavior, metabolism, defense mechanisms and adaptation of bacteria to stress. In this review, we focus on bacterial protein switches that are activated during exposure to oxidative stress. Such protein switches are triggered by either exogenous reactive oxygen species (ROS) or endogenous ROS generated as by-products of the aerobic lifestyle. Both thiol switches and metal centers have been shown to be the primary targets of ROS. Cells take advantage of such reactivity to use these reactive sites as redox sensors to detect and combat oxidative stress conditions. This in turn may induce expression of genes involved in antioxidant strategies and thus protect the proteome against stress conditions. We further describe the well-characterized mechanism of selected proteins that are regulated by redox switches. We highlight the diversity of mechanisms and functions (as well as common features) across different switches, while also presenting integrative methodologies used in discovering new members of this family. Finally, we point to future challenges in this field, both in uncovering new types of switches, as well as defining novel additional functions.
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Affiliation(s)
- Rosi Fassler
- Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Lisa Zuily
- Aix-Marseille University, CNRS, BIP, UMR 7281, IMM, Marseille, France
| | - Nora Lahrach
- Aix-Marseille University, CNRS, BIP, UMR 7281, IMM, Marseille, France
| | - Marianne Ilbert
- Aix-Marseille University, CNRS, BIP, UMR 7281, IMM, Marseille, France
| | - Dana Reichmann
- Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram, The Hebrew University of Jerusalem, Jerusalem, Israel
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Hitaishi VP, Clément R, Quattrocchi L, Parent P, Duché D, Zuily L, Ilbert M, Lojou E, Mazurenko I. Interplay between Orientation at Electrodes and Copper Activation of Thermus thermophilus Laccase for O2 Reduction. J Am Chem Soc 2019; 142:1394-1405. [DOI: 10.1021/jacs.9b11147] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Vivek Pratap Hitaishi
- Aix Marseille Univ, CNRS, BIP UMR 7281, 31 Chemin Aiguier, CS 70071, 13402 Marseille, Cedex 09, France
- Aix Marseille Univ, CNRS, IMM FR 3479, 31 Chemin Aiguier, CS 70071, 13402 Marseille, Cedex 09, France
| | - Romain Clément
- Aix Marseille Univ, CNRS, BIP UMR 7281, 31 Chemin Aiguier, CS 70071, 13402 Marseille, Cedex 09, France
- Aix Marseille Univ, CNRS, IMM FR 3479, 31 Chemin Aiguier, CS 70071, 13402 Marseille, Cedex 09, France
| | - Ludovica Quattrocchi
- Aix Marseille Univ, CNRS, BIP UMR 7281, 31 Chemin Aiguier, CS 70071, 13402 Marseille, Cedex 09, France
- Aix Marseille Univ, CNRS, IMM FR 3479, 31 Chemin Aiguier, CS 70071, 13402 Marseille, Cedex 09, France
| | - Philippe Parent
- Aix Marseille Univ, CNRS, CINAM UMR 7325, Campus de Luminy, 13288 Marseille, Cedex 09, France
| | - David Duché
- Aix Marseille Univ, Université de Toulon, CNRS, IM2NP UMR 7334, 13397 Marseille, France
| | - Lisa Zuily
- Aix Marseille Univ, CNRS, BIP UMR 7281, 31 Chemin Aiguier, CS 70071, 13402 Marseille, Cedex 09, France
- Aix Marseille Univ, CNRS, IMM FR 3479, 31 Chemin Aiguier, CS 70071, 13402 Marseille, Cedex 09, France
| | - Marianne Ilbert
- Aix Marseille Univ, CNRS, BIP UMR 7281, 31 Chemin Aiguier, CS 70071, 13402 Marseille, Cedex 09, France
- Aix Marseille Univ, CNRS, IMM FR 3479, 31 Chemin Aiguier, CS 70071, 13402 Marseille, Cedex 09, France
| | - Elisabeth Lojou
- Aix Marseille Univ, CNRS, BIP UMR 7281, 31 Chemin Aiguier, CS 70071, 13402 Marseille, Cedex 09, France
- Aix Marseille Univ, CNRS, IMM FR 3479, 31 Chemin Aiguier, CS 70071, 13402 Marseille, Cedex 09, France
| | - Ievgen Mazurenko
- Aix Marseille Univ, CNRS, BIP UMR 7281, 31 Chemin Aiguier, CS 70071, 13402 Marseille, Cedex 09, France
- Aix Marseille Univ, CNRS, IMM FR 3479, 31 Chemin Aiguier, CS 70071, 13402 Marseille, Cedex 09, France
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8
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Wang X, Clément R, Roger M, Bauzan M, Mazurenko I, Poulpiquet AD, Ilbert M, Lojou E. Bacterial Respiratory Chain Diversity Reveals a Cytochrome c Oxidase Reducing O 2 at Low Overpotentials. J Am Chem Soc 2019; 141:11093-11102. [PMID: 31274287 DOI: 10.1021/jacs.9b03268] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Cytochrome c oxidases (CcOs) are the terminal enzymes in energy-converting chains of microorganisms, where they reduce oxygen into water. Their affinity for O2 makes them attractive biocatalysts for technological devices in which O2 concentration is limited, but the high overpotentials they display on electrodes severely limit their applicative use. Here, the CcO of the acidophilic bacterium Acidithiobacillus ferrooxidans is studied on various carbon materials by direct protein electrochemistry and mediated one with redox mediators either diffusing or co-immobilized at the electrode surface. The entrapment of the CcO in a network of hydrophobic carbon nanofibers permits a direct electrochemical communication between the enzyme and the electrode. We demonstrate that the CcO displays a μM affinity for O2 and reduces O2 at exceptionally high electrode potentials in the range of +700 to +540 mV vs NHE over a pH range of 4-6. The kinetics of interactions between the enzyme and its physiological partners are fully quantified. Based on these results, an electron transfer pathway allowing O2 reduction in the acidic metabolic chain is proposed.
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Affiliation(s)
- Xie Wang
- Aix-Marseille Univ , CNRS, BIP UMR 7281, 31 Chemin Aiguier , CS 70071, 13402 Marseille Cedex 09 , France
| | - Romain Clément
- Aix-Marseille Univ , CNRS, BIP UMR 7281, 31 Chemin Aiguier , CS 70071, 13402 Marseille Cedex 09 , France
| | - Magali Roger
- School of Natural and Environmental Sciences , Newcastle University , Devonshire Building , NE1 7RX , Newcastle upon Tyne , England
| | - Marielle Bauzan
- Aix-Marseille Univ , CNRS, IMM FR 3479, 31 Chemin Aiguier , 13009 Marseille , France
| | - Ievgen Mazurenko
- Aix-Marseille Univ , CNRS, BIP UMR 7281, 31 Chemin Aiguier , CS 70071, 13402 Marseille Cedex 09 , France
| | - Anne de Poulpiquet
- Aix-Marseille Univ , CNRS, BIP UMR 7281, 31 Chemin Aiguier , CS 70071, 13402 Marseille Cedex 09 , France
| | - Marianne Ilbert
- Aix-Marseille Univ , CNRS, BIP UMR 7281, 31 Chemin Aiguier , CS 70071, 13402 Marseille Cedex 09 , France
| | - Elisabeth Lojou
- Aix-Marseille Univ , CNRS, BIP UMR 7281, 31 Chemin Aiguier , CS 70071, 13402 Marseille Cedex 09 , France
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9
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Hitaishi VP, Mazurenko I, Harb M, Clément R, Taris M, Castano S, Duché D, Lecomte S, Ilbert M, de Poulpiquet A, Lojou E. Electrostatic-Driven Activity, Loading, Dynamics, and Stability of a Redox Enzyme on Functionalized-Gold Electrodes for Bioelectrocatalysis. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03443] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Ievgen Mazurenko
- School of Biomedical Sciences, University of Leeds, LS2 9JT Leeds, United Kingdom
| | - Malek Harb
- Aix-Marseille Univ, CNRS, BIP, UMR 7281, 31 Chemin Aiguier, 13009 Marseille, France
| | - Romain Clément
- Aix-Marseille Univ, CNRS, BIP, UMR 7281, 31 Chemin Aiguier, 13009 Marseille, France
| | - Marion Taris
- Institute for Chemistry and Biology of Membrane and Nano-objects, Allée Geoffroy St. Hilaire, 33600 Pessac, France
| | - Sabine Castano
- Institute for Chemistry and Biology of Membrane and Nano-objects, Allée Geoffroy St. Hilaire, 33600 Pessac, France
| | - David Duché
- Aix Marseille Univ, CNRS, University of Toulon, IM2NP UMR 7334, 13397 Marseille, France
| | - Sophie Lecomte
- Institute for Chemistry and Biology of Membrane and Nano-objects, Allée Geoffroy St. Hilaire, 33600 Pessac, France
| | - Marianne Ilbert
- Aix-Marseille Univ, CNRS, BIP, UMR 7281, 31 Chemin Aiguier, 13009 Marseille, France
| | - Anne de Poulpiquet
- Aix-Marseille Univ, CNRS, BIP, UMR 7281, 31 Chemin Aiguier, 13009 Marseille, France
| | - Elisabeth Lojou
- Aix-Marseille Univ, CNRS, BIP, UMR 7281, 31 Chemin Aiguier, 13009 Marseille, France
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10
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Mileo E, Ilbert M, Barducci A, Bordes P, Castanié-Cornet MP, Garnier C, Genevaux P, Gillet R, Goloubinoff P, Ochsenbein F, Richarme G, Iobbi-Nivol C, Giudici-Orticoni MT, Gontero B, Genest O. Emerging fields in chaperone proteins: A French workshop. Biochimie 2018; 151:159-165. [PMID: 29890204 DOI: 10.1016/j.biochi.2018.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 06/06/2018] [Indexed: 10/14/2022]
Abstract
The "Bioénergétique et Ingénierie des Protéines (BIP)" laboratory, CNRS (France), organized its first French workshop on molecular chaperone proteins and protein folding in November 2017. The goal of this workshop was to gather scientists working in France on chaperone proteins and protein folding. This initiative was a great success with excellent talks and fruitful discussions. The highlights were on the description of unexpected functions and post-translational regulation of known molecular chaperones (such as Hsp90, Hsp33, SecB, GroEL) and on state-of-the-art methods to tackle questions related to this theme, including Cryo-electron microscopy, Nuclear Magnetic Resonance (NMR), Electron Paramagnetic Resonance (EPR), simulation and modeling. We expect to organize a second workshop in two years that will include more scientists working in France in the chaperone field.
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Affiliation(s)
- Elisabetta Mileo
- Aix Marseille Univ, CNRS, Laboratoire de Bioénergétique et Ingénierie des Protéines, Marseille, France
| | - Marianne Ilbert
- Aix Marseille Univ, CNRS, Laboratoire de Bioénergétique et Ingénierie des Protéines, Marseille, France
| | - Alessandro Barducci
- Centre de Biochimie Structurale (CBS), INSERM, CNRS, Université de Montpellier, Montpellier, France
| | - Patricia Bordes
- Laboratoire de Microbiologie et Génétique Moléculaires, Centre de Biologie Intégrative, CNRS, Université Paul-Sabatier, Toulouse, France
| | - Marie-Pierre Castanié-Cornet
- Laboratoire de Microbiologie et Génétique Moléculaires, Centre de Biologie Intégrative, CNRS, Université Paul-Sabatier, Toulouse, France
| | - Cyrille Garnier
- Mécanismes Moléculaires dans les Démences Neurodégénératives, Université de Montpellier, EPHE, INSERM, U1198, F-34095, Montpellier, France; Université de Rennes 1, France
| | - Pierre Genevaux
- Laboratoire de Microbiologie et Génétique Moléculaires, Centre de Biologie Intégrative, CNRS, Université Paul-Sabatier, Toulouse, France
| | - Reynald Gillet
- Univ. Rennes, CNRS, Institut de Génétique et Développement de Rennes (IGDR) UMR6290, Rennes, France
| | - Pierre Goloubinoff
- Département de Biologie Moléculaire Végétale, Université de Lausanne, 1015, Lausanne, Switzerland
| | - Françoise Ochsenbein
- Institute for Integrative Biology of the Cell (I2BC), Joliot, CEA, CNRS, Univ. Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Gilbert Richarme
- UMR 8601 CNRS, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes-Sorbonne Paris Cité, Paris, France
| | - Chantal Iobbi-Nivol
- Aix Marseille Univ, CNRS, Laboratoire de Bioénergétique et Ingénierie des Protéines, Marseille, France
| | | | - Brigitte Gontero
- Aix Marseille Univ, CNRS, Laboratoire de Bioénergétique et Ingénierie des Protéines, Marseille, France
| | - Olivier Genest
- Aix Marseille Univ, CNRS, Laboratoire de Bioénergétique et Ingénierie des Protéines, Marseille, France.
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11
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Wang X, Roger M, Clément R, Lecomte S, Biaso F, Abriata LA, Mansuelle P, Mazurenko I, Giudici-Orticoni MT, Lojou E, Ilbert M. Electron transfer in an acidophilic bacterium: interaction between a diheme cytochrome and a cupredoxin. Chem Sci 2018; 9:4879-4891. [PMID: 29910941 PMCID: PMC5982212 DOI: 10.1039/c8sc01615a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 04/30/2018] [Indexed: 12/15/2022] Open
Abstract
Acidithiobacillus ferrooxidans, a chemolithoautotrophic Gram-negative bacterium, has a remarkable ability to obtain energy from ferrous iron oxidation at pH 2. Several metalloproteins have been described as being involved in this respiratory chain coupling iron oxidation with oxygen reduction. However, their properties and physiological functions remain largely unknown, preventing a clear understanding of the global mechanism. In this work, we focus on two metalloproteins of this respiratory pathway, a diheme cytochrome c4 (Cyt c4) and a green copper protein (AcoP) of unknown function. We first demonstrate the formation of a complex between these two purified proteins, which allows homogeneous intermolecular electron-transfer in solution. We then mimic the physiological interaction between the two partners by replacing one at a time with electrodes displaying different chemical functionalities. From the electrochemical behavior of individual proteins, we show that, while electron transfer on AcoP requires weak electrostatic interaction, electron transfer on Cyt c4 tolerates different charge and hydrophobicity conditions, suggesting a pivotal role of this protein in the metabolic chain. The electrochemical study of the proteins incubated together demonstrates an intermolecular electron transfer involving the protein complex, in which AcoP is reduced through the high potential heme of Cyt c4. Modelling of the electrochemical signals at different scan rates allows us to estimate the rate constant of this intermolecular electron transfer in the range of a few s-1. Possible routes for electron transfer in the acidophilic bacterium are deduced.
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Affiliation(s)
- X Wang
- Aix Marseille Univ , CNRS , IMM , BIP , UMR 7281 , 31 Chemin Aiguier , 13009 Marseille , France . ;
| | - M Roger
- School of Life Sciences , University of Dundee , Dundee , DD1 5EH , Scotland , UK
| | - R Clément
- Aix Marseille Univ , CNRS , IMM , BIP , UMR 7281 , 31 Chemin Aiguier , 13009 Marseille , France . ;
| | - S Lecomte
- Institute for Chemistry and Biology of Membrane and Nano-objects , Allée Geoffroy St Hilaire , 33600 Pessac , France
| | - F Biaso
- Aix Marseille Univ , CNRS , IMM , BIP , UMR 7281 , 31 Chemin Aiguier , 13009 Marseille , France . ;
| | - L A Abriata
- Laboratory for Biomolecular Modeling , École Polytechnique Fédérale de Lausanne and Swiss Institute of Bioinformatics , AAB014, Station 19 , 1015 Lausanne , Switzerland
| | - P Mansuelle
- Aix Marseille Univ , CNRS , Institut de Microbiologie de la Méditerranée , FR 3479, Plate-forme Protéomique, Marseille Protéomique (MaP), B.P. 71 , 13402 Marseille Cedex 20 , France
| | - I Mazurenko
- School of Biomedical Sciences , Leeds , LS2 9JT , UK
| | - M T Giudici-Orticoni
- Aix Marseille Univ , CNRS , IMM , BIP , UMR 7281 , 31 Chemin Aiguier , 13009 Marseille , France . ;
| | - E Lojou
- Aix Marseille Univ , CNRS , IMM , BIP , UMR 7281 , 31 Chemin Aiguier , 13009 Marseille , France . ;
| | - M Ilbert
- Aix Marseille Univ , CNRS , IMM , BIP , UMR 7281 , 31 Chemin Aiguier , 13009 Marseille , France . ;
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12
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Feifel SC, Stieger KR, Hejazi M, Wang X, Ilbert M, Zouni A, Lojou E, Lisdat F. Dihemic c4-type cytochrome acting as a surrogate electron conduit: Artificially interconnecting a photosystem I supercomplex with electrodes. Electrochem commun 2018. [DOI: 10.1016/j.elecom.2018.05.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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13
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Roger M, Sciara G, Biaso F, Lojou E, Wang X, Bauzan M, Giudici-Orticoni MT, Vila AJ, Ilbert M. Impact of copper ligand mutations on a cupredoxin with a green copper center. Biochimica et Biophysica Acta (BBA) - Bioenergetics 2017; 1858:351-359. [DOI: 10.1016/j.bbabio.2017.02.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 02/10/2017] [Accepted: 02/14/2017] [Indexed: 11/26/2022]
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14
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Monsalve K, Mazurenko I, Gutierrez-Sanchez C, Ilbert M, Infossi P, Frielingsdorf S, Giudici-Orticoni MT, Lenz O, Lojou E. Impact of Carbon Nanotube Surface Chemistry on Hydrogen Oxidation by Membrane-Bound Oxygen-Tolerant Hydrogenases. ChemElectroChem 2016. [DOI: 10.1002/celc.201600460] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Karen Monsalve
- Aix Marseille Univ, CNRS, BIP, UMR 7281; 31 chemin Joseph Aiguier 13402 Marseille France
| | - Ievgen Mazurenko
- Aix Marseille Univ, CNRS, BIP, UMR 7281; 31 chemin Joseph Aiguier 13402 Marseille France
| | | | - Marianne Ilbert
- Aix Marseille Univ, CNRS, BIP, UMR 7281; 31 chemin Joseph Aiguier 13402 Marseille France
| | - Pascale Infossi
- Aix Marseille Univ, CNRS, BIP, UMR 7281; 31 chemin Joseph Aiguier 13402 Marseille France
| | - Stefan Frielingsdorf
- Institute für Chemie, Sekretariat PC14; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Germany
| | | | - Oliver Lenz
- Institute für Chemie, Sekretariat PC14; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Germany
| | - Elisabeth Lojou
- Aix Marseille Univ, CNRS, BIP, UMR 7281; 31 chemin Joseph Aiguier 13402 Marseille France
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15
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Monsalve K, Roger M, Gutierrez-Sanchez C, Ilbert M, Nitsche S, Byrne-Kodjabachian D, Marchi V, Lojou E. Hydrogen bioelectrooxidation on gold nanoparticle-based electrodes modified by Aquifex aeolicus hydrogenase: Application to hydrogen/oxygen enzymatic biofuel cells. Bioelectrochemistry 2015; 106:47-55. [DOI: 10.1016/j.bioelechem.2015.04.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Revised: 04/09/2015] [Accepted: 04/13/2015] [Indexed: 02/08/2023]
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16
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Roger M, Biaso F, Castelle CJ, Bauzan M, Chaspoul F, Lojou E, Sciara G, Caffarri S, Giudici-Orticoni MT, Ilbert M. Spectroscopic characterization of a green copper site in a single-domain cupredoxin. PLoS One 2014; 9:e98941. [PMID: 24932914 PMCID: PMC4059628 DOI: 10.1371/journal.pone.0098941] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Accepted: 05/09/2014] [Indexed: 12/13/2022] Open
Abstract
Cupredoxins are widespread copper-binding proteins, mainly involved in electron transfer pathways. They display a typical rigid greek key motif consisting of an eight stranded β-sandwich. A fascinating feature of cupredoxins is the natural diversity of their copper center geometry. These geometry variations give rise to drastic changes in their color, such as blue, green, red or purple. Based on several spectroscopic and structural analyses, a connection between the geometry of their copper-binding site and their color has been proposed. However, little is known about the relationship between such diversity of copper center geometry in cupredoxins and possible implications for function. This has been difficult to assess, as only a few naturally occurring green and red copper sites have been described so far. We report herein the spectrocopic characterization of a novel kind of single domain cupredoxin of green color, involved in a respiratory pathway of the acidophilic organism Acidithiobacillus ferrooxidans. Biochemical and spectroscopic characterization coupled to bioinformatics analysis reveal the existence of some unusual features for this novel member of the green cupredoxin sub-family. This protein has the highest redox potential reported to date for a green-type cupredoxin. It has a constrained green copper site insensitive to pH or temperature variations. It is a green-type cupredoxin found for the first time in a respiratory pathway. These unique properties might be explained by a region of unknown function never found in other cupredoxins, and by an unusual length of the loop between the second and the fourth copper ligands. These discoveries will impact our knowledge on non-engineered green copper sites, whose involvement in respiratory chains seems more widespread than initially thought.
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Affiliation(s)
- Magali Roger
- Unité de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, CNRS-UMR7281, Aix-Marseille Université, Marseille, France
| | - Frédéric Biaso
- Unité de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, CNRS-UMR7281, Aix-Marseille Université, Marseille, France
| | - Cindy J. Castelle
- Department of Earth and Planetary Science, University of California, Berkeley, California, United States of America
| | - Marielle Bauzan
- Unité de Fermentation, Institut de Microbiologie de la Méditerranée, CNRS-FR 3479, Aix Marseille Université, Marseille, France
| | - Florence Chaspoul
- Unité Chimie Physique, Prévention des Risques et Nuisances Technologiques, Faculté de Pharmacie, CNRS-UMR 7263, Aix-Marseille Université, Marseille, France
| | - Elisabeth Lojou
- Unité de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, CNRS-UMR7281, Aix-Marseille Université, Marseille, France
| | - Giuliano Sciara
- Unité de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, CNRS-UMR7281, Aix-Marseille Université, Marseille, France
| | - Stefano Caffarri
- Unité de Biologie Végétale et Microbiologie Environnementales, CNRS-UMR 7265, CEA, Aix Marseille Université, Marseille, France
| | - Marie-Thérèse Giudici-Orticoni
- Unité de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, CNRS-UMR7281, Aix-Marseille Université, Marseille, France
| | - Marianne Ilbert
- Unité de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, CNRS-UMR7281, Aix-Marseille Université, Marseille, France
- * E-mail:
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17
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Redelberger D, Genest O, Arabet D, Méjean V, Ilbert M, Iobbi-Nivol C. Quality control of a molybdoenzyme by the Lon protease. FEBS Lett 2013; 587:3935-42. [PMID: 24211448 DOI: 10.1016/j.febslet.2013.10.045] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Revised: 10/25/2013] [Accepted: 10/28/2013] [Indexed: 01/20/2023]
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18
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Jakob UH, Reichmann D, Xu Y, Ilbert M, Cremers CM, Fitzgerald M. Redox Control of Chaperone Function. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.458.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ursula H Jakob
- Molecular, Cellular and Developmental BiologyUniversity of MichiganAnn ArborMI
| | - Dana Reichmann
- Molecular, Cellular and Developmental BiologyUniversity of MichiganAnn ArborMI
- Biological ChemistryHebrew University of JerusalemJerusalemIsrael
| | - Ying Xu
- Chemistry and BiochemistryDuke UniversityDurhamNC
| | - Marianne Ilbert
- Molecular, Cellular and Developmental BiologyUniversity of MichiganAnn ArborMI
| | - Claudia M Cremers
- Molecular, Cellular and Developmental BiologyUniversity of MichiganAnn ArborMI
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19
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Guiral M, Prunetti L, Aussignargues C, Ciaccafava A, Infossi P, Ilbert M, Lojou E, Giudici-Orticoni MT. The hyperthermophilic bacterium Aquifex aeolicus: from respiratory pathways to extremely resistant enzymes and biotechnological applications. Adv Microb Physiol 2013; 61:125-94. [PMID: 23046953 DOI: 10.1016/b978-0-12-394423-8.00004-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Aquifex aeolicus isolated from a shallow submarine hydrothermal system belongs to the order Aquificales which constitute an important component of the microbial communities at elevated temperatures. This hyperthermophilic chemolithoautotrophic bacterium, which utilizes molecular hydrogen, molecular oxygen, and inorganic sulfur compounds to flourish, uses the reductive TCA cycle for CO(2) fixation. In this review, the intricate energy metabolism of A. aeolicus is described. As the chemistry of sulfur is complex and multiple sulfur species can be generated, A. aeolicus possesses a multitude of different enzymes related to the energy sulfur metabolism. It contains also membrane-embedded [NiFe] hydrogenases as well as oxidases enzymes involved in hydrogen and oxygen utilization. We have focused on some of these proteins that have been extensively studied and characterized as super-resistant enzymes with outstanding properties. We discuss the potential use of hydrogenases in an attractive H(2)/O(2) biofuel cell in replacement of chemical catalysts. Using complete genomic sequence and biochemical data, we present here a global view of the energy-generating mechanisms of A. aeolicus including sulfur compounds reduction and oxidation pathways as well as hydrogen and oxygen utilization.
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Affiliation(s)
- Marianne Guiral
- Unité de Bioénergétique et Ingénierie des Protéines, UMR7281-FR3479, CNRS, Aix-Marseille Université, Marseille, France.
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20
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Ilbert M, Bonnefoy V. Insight into the evolution of the iron oxidation pathways. Biochim Biophys Acta 2012; 1827:161-75. [PMID: 23044392 DOI: 10.1016/j.bbabio.2012.10.001] [Citation(s) in RCA: 185] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 09/27/2012] [Accepted: 10/01/2012] [Indexed: 01/01/2023]
Abstract
Iron is a ubiquitous element in the universe. Ferrous iron (Fe(II)) was abundant in the primordial ocean until the oxygenation of the Earth's atmosphere led to its widespread oxidation and precipitation. This change of iron bioavailability likely put selective pressure on the evolution of life. This element is essential to most extant life forms and is an important cofactor in many redox-active proteins involved in a number of vital pathways. In addition, iron plays a central role in many environments as an energy source for some microorganisms. This review is focused on Fe(II) oxidation. The fact that the ability to oxidize Fe(II) is widely distributed in Bacteria and Archaea and in a number of quite different biotopes suggests that the dissimilatory Fe(II) oxidation is an ancient energy metabolism. Based on what is known today about Fe(II) oxidation pathways, we propose that they arose independently more than once in evolution and evolved convergently. The iron paleochemistry, the phylogeny, the physiology of the iron oxidizers, and the nature of the cofactors of the redox proteins involved in these pathways suggest a possible scenario for the timescale in which each type of Fe(II) oxidation pathways evolved. The nitrate dependent anoxic iron oxidizers are likely the most ancient iron oxidizers. We suggest that the phototrophic anoxic iron oxidizers arose in surface waters after the Archaea/Bacteria-split but before the Great Oxidation Event. The neutrophilic oxic iron oxidizers possibly appeared in microaerobic marine environments prior to the Great Oxidation Event while the acidophilic ones emerged likely after the advent of atmospheric O(2). This article is part of a Special Issue entitled: The evolutionary aspects of bioenergetic systems.
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Affiliation(s)
- Marianne Ilbert
- Aix-Marseille Université, CNRS, BIP UMR7281,13009, Marseille, France.
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21
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Guiral M, Aussignargues C, Prunetti L, Infossi P, Ilbert M, Giudici-Orticoni M. The energy sulfur metabolism of the hyperthermophilic bacterium Aquifex aeolicus. Biochimica et Biophysica Acta (BBA) - Bioenergetics 2012. [DOI: 10.1016/j.bbabio.2012.06.407] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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22
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Reichmann D, Xu Y, Cremers CM, Ilbert M, Mittelman R, Fitzgerald MC, Jakob U. Order out of disorder: working cycle of an intrinsically unfolded chaperone. Cell 2012; 148:947-57. [PMID: 22385960 DOI: 10.1016/j.cell.2012.01.045] [Citation(s) in RCA: 102] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Revised: 10/23/2011] [Accepted: 01/31/2012] [Indexed: 11/15/2022]
Abstract
The redox-regulated chaperone Hsp33 protects organisms against oxidative stress that leads to protein unfolding. Activation of Hsp33 is triggered by the oxidative unfolding of its own redox-sensor domain, making Hsp33 a member of a recently discovered class of chaperones that require partial unfolding for full chaperone activity. Here we address the long-standing question of how chaperones recognize client proteins. We show that Hsp33 uses its own intrinsically disordered regions to discriminate between unfolded and partially structured folding intermediates. Binding to secondary structure elements in client proteins stabilizes Hsp33's intrinsically disordered regions, and this stabilization appears to mediate Hsp33's high affinity for structured folding intermediates. Return to nonstress conditions reduces Hsp33's disulfide bonds, which then significantly destabilizes the bound client proteins and in doing so converts them into less-structured, folding-competent client proteins of ATP-dependent foldases. We propose a model in which energy-independent chaperones use internal order-to-disorder transitions to control substrate binding and release.
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Affiliation(s)
- Dana Reichmann
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
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23
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Aussignargues C, Giuliani MC, Infossi P, Lojou E, Guiral M, Giudici-Orticoni MT, Ilbert M. Rhodanese functions as sulfur supplier for key enzymes in sulfur energy metabolism. J Biol Chem 2012; 287:19936-48. [PMID: 22496367 DOI: 10.1074/jbc.m111.324863] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
How microorganisms obtain energy is a challenging topic, and there have been numerous studies on the mechanisms involved. Here, we focus on the energy substrate traffic in the hyperthermophilic bacterium Aquifex aeolicus. This bacterium can use insoluble sulfur as an energy substrate and has an intricate sulfur energy metabolism involving several sulfur-reducing and -oxidizing supercomplexes and enzymes. We demonstrate that the cytoplasmic rhodanese SbdP participates in this sulfur energy metabolism. Rhodaneses are a widespread family of proteins known to transfer sulfur atoms. We show that SbdP has also some unusual characteristics compared with other rhodaneses; it can load a long sulfur chain, and it can interact with more than one partner. Its partners (sulfur reductase and sulfur oxygenase reductase) are key enzymes of the sulfur energy metabolism of A. aeolicus and share the capacity to use long sulfur chains as substrate. We demonstrate a positive effect of SbdP, once loaded with sulfur chains, on sulfur reductase activity, most likely by optimizing substrate uptake. Taken together, these results lead us to propose a physiological role for SbdP as a carrier and sulfur chain donor to these key enzymes, therefore enabling channeling of sulfur substrate in the cell as well as greater efficiency of the sulfur energy metabolism of A. aeolicus.
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Affiliation(s)
- Clément Aussignargues
- Unité de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée-CNRS, Aix-Marseille University, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
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24
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Puvirajesinghe TM, Elantak L, Lignon S, Franche N, Ilbert M, Ansaldi M. DnaJ (Hsp40 protein) binding to folded substrate impacts KplE1 prophage excision efficiency. J Biol Chem 2012; 287:14169-77. [PMID: 22378785 DOI: 10.1074/jbc.m111.331462] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Temperate phages mediate gene transfer and can modify the properties of their host organisms through the acquisition of novel genes, a process called lysogeny. The KplE1 prophage is one of the 10 prophage regions in Escherichia coli K12 MG1655. KplE1 is defective for lysis but fully competent for site-specific recombination. The TorI recombination directionality factor is strictly required for prophage excision from the host genome. We have previously shown that DnaJ promotes KplE1 excision by increasing the affinity of TorI for its site-specific recombination DNA target. Here, we provide evidence of a direct association between TorI and DnaJ using in vitro cross-linking assays and limited proteolysis experiments that show that this interaction allows both proteins to be transiently protected from trypsin digestion. Interestingly, NMR titration experiments showed that binding of DnaJ involves specific regions of the TorI structure. These regions, mainly composed of α-helices, are located on a surface opposite the DNA-binding site. Taken together, we propose that DnaJ, without the aid of DnaK/GrpE, is capable of increasing the efficiency of KplE1 excision by causing a conformational stabilization that allows TorI to adopt a more favorable conformation for binding to its specific DNA target.
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Affiliation(s)
- Tania M Puvirajesinghe
- Laboratoire de Chimie Bactérienne, CNRS UMR7283, Institut de Microbiologie de la Méditerranée, Aix-Marseille University, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
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25
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Ciaccafava A, Infossi P, Ilbert M, Guiral M, Lecomte S, Giudici-Orticoni MT, Lojou E. Electrochemistry, AFM, and PM-IRRA Spectroscopy of Immobilized Hydrogenase: Role of a Hydrophobic Helix in Enzyme Orientation for Efficient H2 Oxidation. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201107053] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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26
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Ciaccafava A, Infossi P, Ilbert M, Guiral M, Lecomte S, Giudici-Orticoni MT, Lojou E. Electrochemistry, AFM, and PM-IRRA spectroscopy of immobilized hydrogenase: role of a hydrophobic helix in enzyme orientation for efficient H2 oxidation. Angew Chem Int Ed Engl 2011; 51:953-6. [PMID: 22173906 DOI: 10.1002/anie.201107053] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Indexed: 11/10/2022]
Affiliation(s)
- Alexandre Ciaccafava
- Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée-CNRS, 31 Chemin Aiguier, 13009 Marseille, France
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27
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Evans ML, Schmidt JC, Ilbert M, Doyle SM, Quan S, Bardwell JCA, Jakob U, Wickner S, Chapman MR. E. coli chaperones DnaK, Hsp33 and Spy inhibit bacterial functional amyloid assembly. Prion 2011; 5:323-34. [PMID: 22156728 PMCID: PMC3821533 DOI: 10.4161/pri.18555] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Revised: 10/24/2011] [Accepted: 10/27/2011] [Indexed: 01/17/2023] Open
Abstract
Amyloid formation is an ordered aggregation process, where β-sheet rich polymers are assembled from unstructured or partially folded monomers. We examined how two Escherichia coli cytosolic chaperones, DnaK and Hsp33, and a more recently characterized periplasmic chaperone, Spy, modulate the aggregation of a functional amyloid protein, CsgA. We found that DnaK, the Hsp70 homologue in E. coli, and Hsp33, a redox-regulated holdase, potently inhibited CsgA amyloidogenesis. The Hsp33 anti-amyloidogenesis activity was oxidation dependent, as oxidized Hsp33 was significantly more efficient than reduced Hsp33 at preventing CsgA aggregation. When soluble CsgA was seeded with preformed amyloid fibers, neither Hsp33 nor DnaK were able to efficiently prevent soluble CsgA from adopting the amyloid conformation. Moreover, both DnaK and Hsp33 increased the time that CsgA was reactive with the amyloid oligomer conformation-specific A11 antibody. Since CsgA must also pass through the periplasm during secretion, we assessed the ability of the periplasmic chaperone Spy to inhibit CsgA polymerization. Like DnaK and Hsp33, Spy also inhibited CsgA polymerization in vitro. Overexpression of Spy resulted in increased chaperone activity in periplasmic extracts and in reduced curli biogenesis in vivo. We propose that DnaK, Hsp33 and Spy exert their effects during the nucleation stages of CsgA fibrillation. Thus, both housekeeping and stress induced cytosolic and periplasmic chaperones may be involved in discouraging premature CsgA interactions during curli biogenesis.
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Affiliation(s)
- Margery L Evans
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI, USA
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28
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Evans ML, Schmidt JC, Ilbert M, Doyle SM, Quan S, Bardwell JCA, Jakob U, Wickner S, Chapman MR. E. coli chaperones DnaK, Hsp33 and Spy inhibit bacterial functional amyloid assembly. Prion 2011. [PMID: 22156728 DOI: 10.4161/pri.5.4.18555] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2022] Open
Abstract
Amyloid formation is an ordered aggregation process, where β-sheet rich polymers are assembled from unstructured or partially folded monomers. We examined how two Escherichia coli cytosolic chaperones, DnaK and Hsp33, and a more recently characterized periplasmic chaperone, Spy, modulate the aggregation of a functional amyloid protein, CsgA. We found that DnaK, the Hsp70 homologue in E. coli, and Hsp33, a redox-regulated holdase, potently inhibited CsgA amyloidogenesis. The Hsp33 anti-amyloidogenesis activity was oxidation dependent, as oxidized Hsp33 was significantly more efficient than reduced Hsp33 at preventing CsgA aggregation. When soluble CsgA was seeded with preformed amyloid fibers, neither Hsp33 nor DnaK were able to efficiently prevent soluble CsgA from adopting the amyloid conformation. Moreover, both DnaK and Hsp33 increased the time that CsgA was reactive with the amyloid oligomer conformation-specific A11 antibody. Since CsgA must also pass through the periplasm during secretion, we assessed the ability of the periplasmic chaperone Spy to inhibit CsgA polymerization. Like DnaK and Hsp33, Spy also inhibited CsgA polymerization in vitro. Overexpression of Spy resulted in increased chaperone activity in periplasmic extracts and in reduced curli biogenesis in vivo. We propose that DnaK, Hsp33 and Spy exert their effects during the nucleation stages of CsgA fibrillation. Thus, both housekeeping and stress induced cytosolic and periplasmic chaperones may be involved in discouraging premature CsgA interactions during curli biogenesis.
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Affiliation(s)
- Margery L Evans
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI, USA
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29
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Zhao F, Ilbert M, Varadan R, Cremers CM, Hoyos B, Acin-Perez R, Vinogradov V, Cowburn D, Jakob U, Hammerling U. Are zinc-finger domains of protein kinase C dynamic structures that unfold by lipid or redox activation? Antioxid Redox Signal 2011; 14:757-66. [PMID: 21067413 PMCID: PMC3030452 DOI: 10.1089/ars.2010.3773] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Protein kinase C (PKC) is activated by lipid second messengers or redox action, raising the question whether these activation modes involve the same or alternate mechanisms. Here we show that both lipid activators and oxidation target the zinc-finger domains of PKC, suggesting a unifying activation mechanism. We found that lipid agonist-binding or redox action leads to zinc release and disassembly of zinc fingers, thus triggering large-scale unfolding that underlies conversion to the active enzyme. These results suggest that PKC zinc fingers, originally considered purely structural devices, are in fact redox-sensitive flexible hinges, whose conformation is controlled both by redox conditions and lipid agonists.
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Affiliation(s)
- Feng Zhao
- Immunology Program, Sloan-Kettering Institute for Cancer Research, 1275 York Avenue, New York, NY 10065, USA
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30
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Castelle C, Ilbert M, Infossi P, Leroy G, Giudici-Orticoni MT. An unconventional copper protein required for cytochrome c oxidase respiratory function under extreme acidic conditions. J Biol Chem 2010; 285:21519-25. [PMID: 20442397 PMCID: PMC2898452 DOI: 10.1074/jbc.m110.131359] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2010] [Revised: 04/30/2010] [Indexed: 11/06/2022] Open
Abstract
Very little is known about the processes used by acidophile organisms to preserve stability and function of respiratory pathways. Here, we reveal a potential strategy of these organisms for protecting and keeping functional key enzymes under extreme conditions. Using Acidithiobacillus ferrooxidans, we have identified a protein belonging to a new cupredoxin subfamily, AcoP, for "acidophile CcO partner," which is required for the cytochrome c oxidase (CcO) function. We show that it is a multifunctional copper protein with at least two roles as follows: (i) as a chaperone-like protein involved in the protection of the Cu(A) center of the CcO complex and (ii) as a linker between the periplasmic cytochrome c and the inner membrane cytochrome c oxidase. It could represent an interesting model for investigating the multifunctionality of proteins known to be crucial in pathways of energy metabolism.
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Affiliation(s)
- Cindy Castelle
- From the Laboratoire de Bioénergétique et Ingénierie des Protéines, IMM-CNRS, 13402 Marseille Cedex 20, France
| | - Marianne Ilbert
- From the Laboratoire de Bioénergétique et Ingénierie des Protéines, IMM-CNRS, 13402 Marseille Cedex 20, France
| | - Pascale Infossi
- From the Laboratoire de Bioénergétique et Ingénierie des Protéines, IMM-CNRS, 13402 Marseille Cedex 20, France
| | - Gisèle Leroy
- From the Laboratoire de Bioénergétique et Ingénierie des Protéines, IMM-CNRS, 13402 Marseille Cedex 20, France
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Cremers CM, Reichmann D, Hausmann J, Ilbert M, Jakob U. Unfolding of metastable linker region is at the core of Hsp33 activation as a redox-regulated chaperone. J Biol Chem 2010; 285:11243-51. [PMID: 20139072 DOI: 10.1074/jbc.m109.084350] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Hsp33, a molecular chaperone specifically activated by oxidative stress conditions that lead to protein unfolding, protects cells against oxidative protein aggregation. Stress sensing in Hsp33 occurs via its C-terminal redox switch domain, which consists of a zinc center that responds to the presence of oxidants and an adjacent metastable linker region, which responds to unfolding conditions. Here we show that single mutations in the N terminus of Hsp33 are sufficient to either partially (Hsp33-M172S) or completely (Hsp33-Y12E) abolish this post-translational regulation of Hsp33 chaperone function. Both mutations appear to work predominantly via the destabilization of the Hsp33 linker region without affecting zinc coordination, redox sensitivity, or substrate binding of Hsp33. We found that the M172S substitution causes moderate destabilization of the Hsp33 linker region, which seems sufficient to convert the redox-regulated Hsp33 into a temperature-controlled chaperone. The Y12E mutation leads to the constitutive unfolding of the Hsp33 linker region thereby turning Hsp33 into a constitutively active chaperone. These results demonstrate that the redox-controlled unfolding of the Hsp33 linker region plays the central role in the activation process of Hsp33. The zinc center of Hsp33 appears to act as the redox-sensitive toggle that adjusts the thermostability of the linker region to the cell redox status. In vivo studies confirmed that even mild overexpression of the Hsp33-Y12E mutant protein inhibits bacterial growth, providing important evidence that the tight functional regulation of Hsp33 chaperone activity plays a vital role in bacterial survival.
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Affiliation(s)
- Claudia M Cremers
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan 48109, USA
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32
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Winter J, Ilbert M, Graf PCF, Ozcelik D, Jakob U. Bleach activates a redox-regulated chaperone by oxidative protein unfolding. Cell 2008; 135:691-701. [PMID: 19013278 DOI: 10.1016/j.cell.2008.09.024] [Citation(s) in RCA: 263] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2008] [Revised: 07/26/2008] [Accepted: 09/12/2008] [Indexed: 01/09/2023]
Abstract
Hypochlorous acid (HOCl), the active ingredient in household bleach, is an effective antimicrobial produced by the mammalian host defense to kill invading microorganisms. Despite the widespread use of HOCl, surprisingly little is known about its mode of action. In this study, we demonstrate that low molar ratios of HOCl to protein cause oxidative protein unfolding in vitro and target thermolabile proteins for irreversible aggregation in vivo. As a defense mechanism, bacteria use the redox-regulated chaperone Hsp33, which responds to bleach treatment with the reversible oxidative unfolding of its C-terminal redox switch domain. HOCl-mediated unfolding turns inactive Hsp33 into a highly active chaperone holdase, which protects essential Escherichia coli proteins against HOCl-induced aggregation and increases bacterial HOCl resistance. Our results substantially improve our molecular understanding about HOCl's functional mechanism. They suggest that the antimicrobial effects of bleach are largely based on HOCl's ability to cause aggregation of essential bacterial proteins.
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Affiliation(s)
- J Winter
- Department of Molecular, University of Michigan, Ann Arbor, MI 48109, USA
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33
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Leichert LI, Gehrke F, Gudiseva HV, Blackwell T, Ilbert M, Walker AK, Strahler JR, Andrews PC, Jakob U. Quantifying changes in the thiol redox proteome upon oxidative stress in vivo. Proc Natl Acad Sci U S A 2008; 105:8197-202. [PMID: 18287020 PMCID: PMC2448814 DOI: 10.1073/pnas.0707723105] [Citation(s) in RCA: 406] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2007] [Indexed: 12/19/2022] Open
Abstract
Antimicrobial levels of reactive oxygen species (ROS) are produced by the mammalian host defense to kill invading bacteria and limit bacterial colonization. One main in vivo target of ROS is the thiol group of proteins. We have developed a quantitative thiol trapping technique termed OxICAT to identify physiologically important target proteins of hydrogen peroxide (H(2)O(2)) and hypochlorite (NaOCl) stress in vivo. OxICAT allows the precise quantification of oxidative thiol modifications in hundreds of different proteins in a single experiment. It also identifies the affected proteins and defines their redox-sensitive cysteine(s). Using this technique, we identified a group of Escherichia coli proteins with significantly (30-90%) oxidatively modified thiol groups, which appear to be specifically sensitive to either H(2)O(2) or NaOCl stress. These results indicate that individual oxidants target distinct proteins in vivo. Conditionally essential E. coli genes encode one-third of redox-sensitive proteins, a finding that might explain the bacteriostatic effect of oxidative stress treatment. We identified a select group of redox-regulated proteins, which protect E. coli against oxidative stress conditions. These experiments illustrate that OxICAT, which can be used in a variety of different cell types and organisms, is a powerful tool to identify, quantify, and monitor oxidative thiol modifications in vivo.
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Affiliation(s)
- Lars I. Leichert
- *Department of Molecular, Cellular and Developmental Biology, University of Michigan, 830 North University, Ann Arbor, MI 48109
| | - Florian Gehrke
- *Department of Molecular, Cellular and Developmental Biology, University of Michigan, 830 North University, Ann Arbor, MI 48109
| | - Harini V. Gudiseva
- *Department of Molecular, Cellular and Developmental Biology, University of Michigan, 830 North University, Ann Arbor, MI 48109
| | - Tom Blackwell
- Department of Human Genetics, University of Michigan, 100 Washtenaw Road, Ann Arbor, MI 48109; and
| | - Marianne Ilbert
- *Department of Molecular, Cellular and Developmental Biology, University of Michigan, 830 North University, Ann Arbor, MI 48109
| | - Angela K. Walker
- Michigan Proteome Consortium, University of Michigan, 300 North Ingalls Building, Ann Arbor, MI 48109
| | - John R. Strahler
- Michigan Proteome Consortium, University of Michigan, 300 North Ingalls Building, Ann Arbor, MI 48109
| | - Philip C. Andrews
- Michigan Proteome Consortium, University of Michigan, 300 North Ingalls Building, Ann Arbor, MI 48109
| | - Ursula Jakob
- *Department of Molecular, Cellular and Developmental Biology, University of Michigan, 830 North University, Ann Arbor, MI 48109
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Ilbert M, Horst J, Ahrens S, Winter J, Graf PCF, Lilie H, Jakob U. The redox-switch domain of Hsp33 functions as dual stress sensor. Nat Struct Mol Biol 2007; 14:556-63. [PMID: 17515905 PMCID: PMC2782886 DOI: 10.1038/nsmb1244] [Citation(s) in RCA: 146] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2007] [Accepted: 04/04/2007] [Indexed: 11/09/2022]
Abstract
The redox-regulated chaperone Hsp33 is specifically activated upon exposure of cells to peroxide stress at elevated temperatures. Here we show that Hsp33 harbors two interdependent stress-sensing regions located in the C-terminal redox-switch domain of Hsp33: a zinc center sensing peroxide stress conditions and an adjacent linker region responding to unfolding conditions. Neither of these sensors works sufficiently in the absence of the other, making the simultaneous presence of both stress conditions a necessary requirement for Hsp33's full activation. Upon activation, Hsp33's redox-switch domain adopts a natively unfolded conformation, thereby exposing hydrophobic surfaces in its N-terminal substrate-binding domain. The specific activation of Hsp33 by the oxidative unfolding of its redox-switch domain makes this chaperone optimally suited to quickly respond to oxidative stress conditions that lead to protein unfolding.
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Affiliation(s)
- Marianne Ilbert
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, 830 N-University, Ann Arbor, Michigan 48109-1048, USA
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Abstract
Oxidative stress affects a wide variety of different cellular processes. Now, an increasing number of proteins have been identified that use the presence of reactive oxygen species or alterations in the cellular thiol-disulfide state as regulators of their protein function. This review focuses on two members of this growing group of redox-regulated proteins that utilize a cysteine-containing zinc center as the redox switch: Hsp33, the first molecular chaperone, whose ability to protect cells against stress-induced protein unfolding depends on the presence of reactive oxygen species and RsrA, the first anti-sigma factor that uses a cysteine-containing zinc center to sense and respond to cellular disulfide stress.
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Affiliation(s)
- Marianne Ilbert
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, 48109-1048, USA
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Genest O, Seduk F, Ilbert M, Méjean V, Iobbi-Nivol C. Signal peptide protection by specific chaperone. Biochem Biophys Res Commun 2006; 339:991-5. [PMID: 16337610 DOI: 10.1016/j.bbrc.2005.11.107] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2005] [Accepted: 11/18/2005] [Indexed: 10/25/2022]
Abstract
TorD is the private chaperone of TorA, a periplasmic respiratory molybdoenzyme of Escherichia coli. In this study, it is demonstrated that TorD is required to maintain the integrity of the twin-arginine signal sequence of the cytoplasmic TorA precursors. In the absence of TorD, 35 out of the 39 amino acid residues of the signal peptide were lost and the proteolysis of the N-terminal extremity of TorA precursors was not prevented by the molybdenum cofactor insertion. We thus propose that one of the main roles of TorD is to protect the TorA signal peptide to allow translocation of the enzyme by the TAT system.
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Affiliation(s)
- Olivier Genest
- Laboratoire de Chimie Bactérienne, Institut de Biologie Structurale et Microbiologie, Centre National de la Recherche Scientifique Marseille, France
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Abstract
TorD has been recognized as an accessory protein that improves maturation of TorA, the molybdenum cofactor-containing trimethylamine oxide reductase of Escherichia coli. In this study, we show that at 42 degrees C and in the absence of TorD TorA is poorly matured and almost completely degraded. Strikingly, TorD restores TorA maturation to the same level whatever the growth temperature. In vitro experiments in which apoTorA was incubated with or without TorD at various temperatures confirm that TorD is an essential chaperone for TorA at elevated temperatures preventing apoTorA mis-folding before cofactor insertion.
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Affiliation(s)
- Olivier Genest
- Laboratoire de Chimie Bactérienne, Institut de Biologie Structurale et Microbiologie, Centre National de la Recherche Scientifique, Cedex 20, 13402 Marseille, France
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Ilbert M, Méjean V, Iobbi-Nivol C. Functional and structural analysis of members of the TorD family, a large chaperone family dedicated to molybdoproteins. Microbiology (Reading) 2004; 150:935-943. [PMID: 15073303 DOI: 10.1099/mic.0.26909-0] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.1] [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: 11/18/2022] Open
Abstract
The trimethylamineN-oxide (TMAO) reductase TorA, a DMSO reductase family member, is a periplasmic molybdoenzyme ofEscherichia coli. The cytoplasmic protein TorD acts as a chaperone for TorA, allowing the efficient insertion of the molybdenum cofactor into the apoform of the enzyme prior to its secretion. This paper demonstrates that TorD is a member of a large family of prokaryotic proteins that are structurally related. Moreover, their genes generally belong to operons also encoding molybdoenzymes of the DMSO reductase family. Both the TorD and the DMSO reductase families present a similar phylogenetic organization, suggesting a co-evolution of these two families of proteins. This hypothesis is also supported by the fact that the TorD and DmsD chaperones cannot replace each other and thus appear dedicated to specific molybdopartners. Interestingly, it was found that the positive effect of TorD on TorA maturation, and the partial inhibitory effect of DmsD and homologues, are independent of the TorA signal sequence.
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Affiliation(s)
- Marianne Ilbert
- Laboratoire de Chimie Bactérienne, Institut de Biologie Structurale et Microbiologie, Centre National de la Recherche Scientifique, 31, chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | - Vincent Méjean
- Laboratoire de Chimie Bactérienne, Institut de Biologie Structurale et Microbiologie, Centre National de la Recherche Scientifique, 31, chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | - Chantal Iobbi-Nivol
- Laboratoire de Chimie Bactérienne, Institut de Biologie Structurale et Microbiologie, Centre National de la Recherche Scientifique, 31, chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
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Ilbert M, Méjean V, Giudici-Orticoni MT, Samama JP, Iobbi-Nivol C. Involvement of a mate chaperone (TorD) in the maturation pathway of molybdoenzyme TorA. J Biol Chem 2003; 278:28787-92. [PMID: 12766163 DOI: 10.1074/jbc.m302730200] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.0] [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
As many prokaryotic molybdoenzymes, the trimethylamine oxide reductase (TorA) of Escherichia coli requires the insertion of a bis(molybdopterin guanine dinucleotide)molybdenum cofactor in its catalytic site to be active and translocated to the periplasm. We show in vitro that the purified apo form of TorA was activated weakly when an appropriate bis(molybdopterin guanine dinucleotide)molybdenum source was provided, whereas addition of the TorD chaperone increased apoTorA activation up to 4-fold, allowing maturation of most of the apoprotein. We demonstrate that TorD alone is sufficient for the efficient activation of apoTorA by performing a minimal in vitro assay containing only the components for the cofactor synthesis, apoTorA and TorD. Interestingly, incubation of apoTorA with TorD before cofactor addition led to a significant increase of apoTorA activation, suggesting that TorD acts on apoTorA before cofactor insertion. This result is consistent with the fact that TorD binds to apoTorA and probably modifies its conformation in the absence of cofactor. Therefore, we propose that TorD is involved in the first step of TorA maturation to make it competent to receive the cofactor.
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Affiliation(s)
- Marianne Ilbert
- Laboratoire de Chimie Bactérienne and Laboratoire de Bioénergétique et Ingénierie des Protéines, Institut de Biologie Structurale et Microbiologie, CNRS, 31, chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
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Tranier S, Iobbi-Nivol C, Birck C, Ilbert M, Mortier-Barrière I, Méjean V, Samama JP. A novel protein fold and extreme domain swapping in the dimeric TorD chaperone from Shewanella massilia. Structure 2003; 11:165-74. [PMID: 12575936 DOI: 10.1016/s0969-2126(03)00008-x] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.6] [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: 11/17/2022]
Abstract
TorD is the cytoplasmic chaperone involved in the maturation of the molybdoenzyme TorA prior to the translocation of the folded protein into the periplasm. The X-ray structure at 2.4 A resolution of the TorD dimer reveals extreme domain swapping between the two subunits. The all-helical architecture of the globular domains within the intertwined molecular dimer shows no similarity with known protein structures. According to sequence similarities, this new fold probably represents the architecture of the chaperones associated with the bacterial DMSO/TMAO reductases and also that of proteins of yet unknown functions. The occurrence of multiple oligomeric forms and the chaperone activity of both monomeric and dimeric TorD raise questions about the possible biological role of domain swapping in this protein.
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Affiliation(s)
- Samuel Tranier
- Groupe de Cristallographie Biologique, Institut de Pharmacologie et Biologie Structurale, 205 route de Narbonne, 31077, Toulouse Cedex, France
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Tranier S, Mortier-Barrière I, Ilbert M, Birck C, Iobbi-Nivol C, Méjean V, Samama JP. Characterization and multiple molecular forms of TorD from Shewanella massilia, the putative chaperone of the molybdoenzyme TorA. Protein Sci 2002; 11:2148-57. [PMID: 12192070 PMCID: PMC2373589 DOI: 10.1110/ps.0202902] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Several bacteria use trimethylamine N-oxyde (TMAO) as an exogenous electron acceptor for anaerobic respiration. This metabolic pathway involves expression of the tor operon that codes for a periplasmic molybdopterin-containing reductase of the DMSO/TMAO family, a pentahemic c-type cytochrome, and the TorD cytoplasmic chaperone, possibly required for acquisition of the molybdenum cofactor and translocation of the reductase by the twin-arginine translocation system. In this report, we show that the TorD chaperone from Shewanella massilia forms multiple and stable oligomeric species. The monomeric, dimeric, and trimeric forms were purified to homogeneity and characterized by analytical ultracentrifugation. Small-angle X-ray scattering (SAXS) and preliminary diffraction data indicated that the TorD dimer is made of identical protein modules of similar size to the monomeric species. Interconversion of the native oligomeric forms occurred at acidic pH value. In this condition, ANS fluorescence indicates a non-native conformation of the polypeptide chain in which, according to the circular dichroism spectra, the alpha-helical content is similar to that of the native species. Surface plasmon resonance showed that both the monomeric and dimeric species bind the mature TorA enzyme, but that the dimer binds its target protein more efficiently. The possible biologic significance of these oligomers is discussed in relation to the chaperone activity of TorD, and to the ability of another member of the TorD family to bind the Twin Arginine leader sequences of the precursor of DMSO/TMAO reductases.
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Affiliation(s)
- Samuel Tranier
- Groupe de Cristallographie Biologique, Institut de Pharmacologie et Biologie Structurale, 31077 Toulouse Cedex, France
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