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Boyeldieu A, Poli J, Ali Chaouche A, Fierobe H, Giudici‐Orticoni M, Méjean V, Jourlin‐Castelli C. Multiple detection of both attractants and repellents by the dCache-chemoreceptor SO_1056 of Shewanella oneidensis. FEBS J 2022; 289:6752-6766. [PMID: 35668695 PMCID: PMC9796306 DOI: 10.1111/febs.16548] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 05/17/2022] [Accepted: 06/06/2022] [Indexed: 01/01/2023]
Abstract
Chemoreceptors are usually transmembrane proteins dedicated to the detection of compound gradients or signals in the surroundings of a bacterium. After detection, they modulate the activation of CheA-CheY, the core of the chemotactic pathway, to allow cells to move upwards or downwards depending on whether the signal is an attractant or a repellent, respectively. Environmental bacteria such as Shewanella oneidensis harbour dozens of chemoreceptors or MCPs (methyl-accepting chemotaxis proteins). A recent study revealed that MCP SO_1056 of S. oneidensis binds chromate. Here, we show that this MCP also detects an additional attractant (l-malate) and two repellents (nickel and cobalt). The experiments were performed in vivo by the agarose-in-plug technique after overproducing MCP SO_1056 and in vitro, when possible, by submitting the purified ligand-binding domain (LBD) of SO_1056 to a thermal shift assay (TSA) coupled to isothermal titration calorimetry (ITC). ITC assays revealed a KD of 3.4 μm for l-malate and of 47.7 μm for nickel. We conclude that MCP SO_1056 binds attractants and repellents of unrelated composition. The LBD of SO_1056 belongs to the double Cache_1 family and is highly homologous to PctA, a chemoreceptor from Pseudomonas aeruginosa that detects several amino acids. Therefore, LBDs of the same family can bind diverse compounds, confirming that experimental approaches are required to define accurate LBD-binding molecules or signals.
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Affiliation(s)
- Anne Boyeldieu
- Laboratoire de Bioénergétique et Ingénierie des Protéines (BIP, UMR7281), Centre National de la Recherche Scientifique, Institut de Microbiologie de la Méditerranée (IMM), Institut Microbiologie, Bioénergies et Biotechnologie (IM2B)Aix Marseille UniversitéFrance,Present address:
Laboratoire de Microbiologie et de Génétique Moléculaires, UMR5100, Centre de Biologie Intégrative (CBI), Centre National de la Recherche Scientifique (CNRS)Université de Toulouse, UPSFrance
| | - Jean‐Pierre Poli
- Laboratoire de Bioénergétique et Ingénierie des Protéines (BIP, UMR7281), Centre National de la Recherche Scientifique, Institut de Microbiologie de la Méditerranée (IMM), Institut Microbiologie, Bioénergies et Biotechnologie (IM2B)Aix Marseille UniversitéFrance,Université de Corse Pasquale PaoliCorteFrance
| | - Amine Ali Chaouche
- Laboratoire de Bioénergétique et Ingénierie des Protéines (BIP, UMR7281), Centre National de la Recherche Scientifique, Institut de Microbiologie de la Méditerranée (IMM), Institut Microbiologie, Bioénergies et Biotechnologie (IM2B)Aix Marseille UniversitéFrance
| | - Henri‐Pierre Fierobe
- Laboratoire de Chimie Bactérienne (LCB, UMR7283), Centre National de la Recherche Scientifique, Institut de Microbiologie de la Méditerranée (IMM), Institut Microbiologie, Bioénergies et Biotechnologie (IM2B)Aix Marseille UniversitéFrance
| | - Marie‐Thérèse Giudici‐Orticoni
- Laboratoire de Bioénergétique et Ingénierie des Protéines (BIP, UMR7281), Centre National de la Recherche Scientifique, Institut de Microbiologie de la Méditerranée (IMM), Institut Microbiologie, Bioénergies et Biotechnologie (IM2B)Aix Marseille UniversitéFrance
| | - Vincent Méjean
- Laboratoire de Bioénergétique et Ingénierie des Protéines (BIP, UMR7281), Centre National de la Recherche Scientifique, Institut de Microbiologie de la Méditerranée (IMM), Institut Microbiologie, Bioénergies et Biotechnologie (IM2B)Aix Marseille UniversitéFrance
| | - Cécile Jourlin‐Castelli
- Laboratoire de Bioénergétique et Ingénierie des Protéines (BIP, UMR7281), Centre National de la Recherche Scientifique, Institut de Microbiologie de la Méditerranée (IMM), Institut Microbiologie, Bioénergies et Biotechnologie (IM2B)Aix Marseille UniversitéFrance
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Chaouche AA, Houot L, Duché D, Iobbi-Nivol C, Giudici-Orticoni MT, Fons M, Méjean V. The Tol-Pal system of Escherichia coli plays an unexpected role in the import of the oxyanions chromate and phosphate. Res Microbiol 2022; 173:103967. [PMID: 35660524 DOI: 10.1016/j.resmic.2022.103967] [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: 02/25/2022] [Revised: 05/23/2022] [Accepted: 05/24/2022] [Indexed: 10/18/2022]
Abstract
Chromate is a toxic metal that enters bacteria by using oxyanion importers. Here, we show that each mutant of the Tol-Pal system of Escherichia coli exhibited increased chromate resistance. This system, which spans the cell envelope, plays a major role in envelope integrity and septation. The ΔtolQR mutant accumulated three-fold less chromate than the wild-type. Addition of phosphate but not sulfate to rich medium drastically reduced chromate toxicity and import in the wild-type strain. Furthermore, the intracellular concentration of free inorganic phosphate was significantly reduced for the ΔtolR mutant in comparison to the wild-type strain. Moreover, extracellular labelled phosphate was significantly less incorporated into the ΔtolR mutant. Finally, two distinct TolQR mutant complexes, specifically affected in Tol-Pal energization without affecting the TolQRA complex structure, did not complement the ΔtolQR mutant for inorganic phosphate accumulation. We thus propose that, while the Pst system is well known to import inorganic phosphate, the Tol-Pal system participates to phosphate uptake in particular at medium to high extracellular phosphate concentrations. Since mutations disabling the Tol-Pal system lead to pleiotropic effects, chromate resistance and reduced inorganic phosphate import could occur from an indirect effect of mutations in components of the Tol-Pal system.
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Affiliation(s)
- Amine Ali Chaouche
- Aix Marseille Univ, CNRS, BIP UMR 7281, IMM, IM2B, 31 Chemin Joseph Aiguier, CS70071, 13402, Marseille Cedex 09, France.
| | - Laetitia Houot
- Aix Marseille Univ, CNRS, LISM UMR 7255, IMM, IM2B, 31 Chemin Joseph Aiguier, CS70071, 13402, Marseille Cedex 09, France.
| | - Denis Duché
- Aix Marseille Univ, CNRS, LISM UMR 7255, IMM, IM2B, 31 Chemin Joseph Aiguier, CS70071, 13402, Marseille Cedex 09, France.
| | - Chantal Iobbi-Nivol
- Aix Marseille Univ, CNRS, BIP UMR 7281, IMM, IM2B, 31 Chemin Joseph Aiguier, CS70071, 13402, Marseille Cedex 09, France.
| | - Marie-Thérèse Giudici-Orticoni
- Aix Marseille Univ, CNRS, BIP UMR 7281, IMM, IM2B, 31 Chemin Joseph Aiguier, CS70071, 13402, Marseille Cedex 09, France.
| | - Michel Fons
- Aix Marseille Univ, CNRS, BIP UMR 7281, IMM, IM2B, 31 Chemin Joseph Aiguier, CS70071, 13402, Marseille Cedex 09, France.
| | - Vincent Méjean
- Aix Marseille Univ, CNRS, BIP UMR 7281, IMM, IM2B, 31 Chemin Joseph Aiguier, CS70071, 13402, Marseille Cedex 09, France
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Boyeldieu A, Ali Chaouche A, Méjean V, Jourlin-Castelli C. Combining two optimized and affordable methods to assign chemoreceptors to a specific signal. Anal Biochem 2021; 620:114139. [PMID: 33621526 DOI: 10.1016/j.ab.2021.114139] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 01/20/2021] [Accepted: 02/12/2021] [Indexed: 01/01/2023]
Abstract
Chemotaxis allows bacteria to detect specific compounds and move accordingly. This pathway involves signal detection by chemoreceptors (MCPs). Attributing a chemoreceptor to a ligand is difficult because there is a lot of redundancy in the MCPs that recognize a single ligand. We propose a methodology to define which chemoreceptors bind a given ligand. First, an MCP is overproduced to increase sensitivity to the ligand(s) it recognizes, thus promoting accumulation of cells around an agarose plug containing a low attractant concentration. Second, the ligand-binding domain (LBD) of the chemoreceptor is fused to maltose-binding protein (MBP), which facilitates purification and provides a control for a thermal shift assay (TSA). An increase in the melting temperature of the LBD in the presence of the ligand indicates that the chemoreceptor directly binds it. We showed that overexpression of two Shewanella oneidensis chemoreceptors (SO_0987 and SO_1056) promoted swimming toward an agarose plug containing a low concentration of chromate. The LBD of each of the two chemoreceptors was fused to MBP. A TSA revealed that only the LBD from SO_1056 had its melting temperature increased by chromate. In conclusion, we describe an efficient approach to define chemoreceptor-ligand pairs before undertaking more-sophisticated biochemical and structural studies.
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Affiliation(s)
- Anne Boyeldieu
- Aix Marseille Univ, CNRS, BIP UMR 7281, IMM, IM2B, Marseille, France
| | | | - Vincent Méjean
- Aix Marseille Univ, CNRS, BIP UMR 7281, IMM, IM2B, Marseille, France
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Lemaire ON, Infossi P, Ali Chaouche A, Espinosa L, Leimkühler S, Giudici-Orticoni MT, Méjean V, Iobbi-Nivol C. Small membranous proteins of the TorE/NapE family, crutches for cognate respiratory systems in Proteobacteria. Sci Rep 2018; 8:13576. [PMID: 30206249 PMCID: PMC6134056 DOI: 10.1038/s41598-018-31851-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [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: 06/05/2018] [Accepted: 08/23/2018] [Indexed: 01/18/2023] Open
Abstract
In this report, we investigate small proteins involved in bacterial alternative respiratory systems that improve the enzymatic efficiency through better anchorage and multimerization of membrane components. Using the small protein TorE of the respiratory TMAO reductase system as a model, we discovered that TorE is part of a subfamily of small proteins that are present in proteobacteria in which they play a similar role for bacterial respiratory systems. We reveal by microscopy that, in Shewanella oneidensis MR1, alternative respiratory systems are evenly distributed in the membrane contrary to what has been described for Escherichia coli. Thus, the better efficiency of the respiratory systems observed in the presence of the small proteins is not due to a specific localization in the membrane, but rather to the formation of membranous complexes formed by TorE homologs with their c-type cytochrome partner protein. By an in vivo approach combining Clear Native electrophoresis and fluorescent translational fusions, we determined the 4:4 stoichiometry of the complexes. In addition, mild solubilization of the cytochrome indicates that the presence of the small protein reinforces its anchoring to the membrane. Therefore, assembly of the complex induced by this small protein improves the efficiency of the respiratory system.
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Affiliation(s)
- Olivier N Lemaire
- Aix-Marseille Université, Laboratoire de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, Centre National de la Recherche Scientifique, 13402, Marseille, France
| | - Pascale Infossi
- Aix-Marseille Université, Laboratoire de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, Centre National de la Recherche Scientifique, 13402, Marseille, France
| | - Amine Ali Chaouche
- Aix-Marseille Université, Laboratoire de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, Centre National de la Recherche Scientifique, 13402, Marseille, France
| | - Leon Espinosa
- Aix-Marseille Université, Laboratoire de Chimie Bactérienne, Institut de Microbiologie de la Méditerranée, Centre National de la Recherche Scientifique, 13402, Marseille, France
| | - Silke Leimkühler
- Institute of Biochemistry and Biology, Department of Molecular Enzymology, University of Potsdam, 14476, Potsdam, Germany
| | - Marie-Thérèse Giudici-Orticoni
- Aix-Marseille Université, Laboratoire de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, Centre National de la Recherche Scientifique, 13402, Marseille, France
| | - Vincent Méjean
- Aix-Marseille Université, Laboratoire de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, Centre National de la Recherche Scientifique, 13402, Marseille, France
| | - Chantal Iobbi-Nivol
- Aix-Marseille Université, Laboratoire de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, Centre National de la Recherche Scientifique, 13402, Marseille, France.
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Baaziz H, Gambari C, Boyeldieu A, Ali Chaouche A, Alatou R, Méjean V, Jourlin-Castelli C, Fons M. ChrASO, the chromate efflux pump of Shewanella oneidensis, improves chromate survival and reduction. PLoS One 2017; 12:e0188516. [PMID: 29166414 PMCID: PMC5699817 DOI: 10.1371/journal.pone.0188516] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [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: 09/22/2017] [Accepted: 11/08/2017] [Indexed: 01/22/2023] Open
Abstract
The chromate efflux pump encoding gene chrASO was identified on the chromosome of Shewanella oneidensis MR1. Although chrASO is expressed without chromate, its expression level increases when Cr(VI) is added. When deleted, the resulting mutant ΔchrASO exhibits a chromate sensitive phenotype compared to that of the wild-type strain. Interestingly, heterologous expression of chrASO in E. coli confers resistance to high chromate concentration. Moreover, expression of chrASO in S. oneidensis and E. coli significantly improves Cr(VI) reduction. This effect could result either from extracytoplasmic chromate reduction or from a better cell survival leading to enhanced Cr(VI) reduction.
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Affiliation(s)
- Hiba Baaziz
- Unité de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, Aix-Marseille Université, Centre National de la Recherche Scientifique, Marseille, France
- Laboratoire de Biologie Moléculaire et Cellulaire, Université des Frères Mentouri Constantine 1, Constantine, Algeria
| | - Cyril Gambari
- Unité de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, Aix-Marseille Université, Centre National de la Recherche Scientifique, Marseille, France
| | - Anne Boyeldieu
- Unité de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, Aix-Marseille Université, Centre National de la Recherche Scientifique, Marseille, France
| | - Amine Ali Chaouche
- Unité de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, Aix-Marseille Université, Centre National de la Recherche Scientifique, Marseille, France
| | - Radia Alatou
- Laboratoire de Biologie Moléculaire et Cellulaire, Université des Frères Mentouri Constantine 1, Constantine, Algeria
| | - Vincent Méjean
- Unité de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, Aix-Marseille Université, Centre National de la Recherche Scientifique, Marseille, France
| | - Cécile Jourlin-Castelli
- Unité de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, Aix-Marseille Université, Centre National de la Recherche Scientifique, Marseille, France
| | - Michel Fons
- Unité de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, Aix-Marseille Université, Centre National de la Recherche Scientifique, Marseille, France
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