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Rayi S, Cai Y, Greenwich JL, Fuqua C, Gerdt JP. Interbacterial Biofilm Competition through a Suite of Secreted Metabolites. ACS Chem Biol 2024; 19:462-470. [PMID: 38261537 PMCID: PMC10951839 DOI: 10.1021/acschembio.3c00655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Abstract
Polymicrobial biofilms are ubiquitous, and the complex interspecies interactions within them are cryptic. We discovered the chemical foundation of antagonistic interactions in a model dual-species biofilm in which Pseudomonas aeruginosa inhibits the biofilm formation of Agrobacterium tumefaciens. Three known siderophores produced by P. aeruginosa (pyoverdine, pyochelin, and dihydroaeruginoic acid) were each capable of inhibiting biofilm formation. Surprisingly, a mutant that was incapable of producing these siderophores still secreted an antibiofilm metabolite. We discovered that this inhibitor was N5-formyl-N5-hydroxy-l-ornithine (fOHOrn)─a precursor in pyoverdine biosynthesis. Unlike the siderophores, this inhibitor did not appear to function via extracellular metal sequestration. In addition to this discovery, the compensatory overproduction of a new biofilm inhibitor illustrates the risk of pleiotropy in genetic knockout experiments. In total, this work lends new insight into the chemical nature of dual-species biofilm regulation and reveals a new naturally produced inhibitor of A. tumefaciens biofilm formation.
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Affiliation(s)
- Soniya Rayi
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Yanyao Cai
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Jennifer L Greenwich
- Department of Biology, Indiana University, Bloomington, Indiana 47405, United States
| | - Clay Fuqua
- Department of Biology, Indiana University, Bloomington, Indiana 47405, United States
| | - Joseph P Gerdt
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
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2
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Rehm K, Vollenweider V, Kümmerli R, Bigler L. Rapid identification of pyoverdines of fluorescent Pseudomonas spp. by UHPLC-IM-MS. Biometals 2023; 36:19-34. [PMID: 36261676 PMCID: PMC9925543 DOI: 10.1007/s10534-022-00454-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 09/26/2022] [Indexed: 11/02/2022]
Abstract
Siderophores are iron-chelating molecules produced by bacteria and other microbes. They are involved with virulence in infections and play key roles in bacterial community assembly and as plant protectants due to their pathogen control properties. Although assays exist to screen whether newly isolated bacteria can produce siderophores, the chemical structures of many of these bio-active molecules remain unidentified due to the lack of rapid analytical procedures. An important group of siderophores are pyoverdines. They consist of a structurally diverse group of chromopeptides, whose amino acid sequence is characteristic for the fluorescent Pseudomonas species that secrets them. Although over 60 pyoverdine structures have been described so far, their characterization is cumbersome and several methods (isoelectrofocusing, iron uptake measurement, mass determination) are typically combined as ambiguous results are often achieved by a single method. Those additional experiments consume valuable time and resources and prevent high-throughput analysis. In this work, we present a new pyoverdine characterisation option by recording their collision cross sections (CCS) using trapped ion mobility spectrometry. This can be done simultaneously in combination with UHPLC and high-resolution MS resulting in a rapid identification of pyoverdines. The high specificity of CCS values is presented for 17 pyoverdines secreted by different Pseudomonas strains. The pyoverdine mass determination by full scan MS was supported by fragments obtained from broadband collision induced dissociation (bbCID). As iron contaminations in laboratories are not uncommon, CCS values of ferripyoverdines were also evaluated. Thereby, unusual and highly characteristic ion mobility patterns were obtained that are suitable as an alternative identification marker.
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Affiliation(s)
- Karoline Rehm
- Department of Chemistry, University of Zurich, Winterthurerstr. 190, 8057, Zurich, Switzerland
| | - Vera Vollenweider
- Department of Quantitative Biomedicine, University of Zurich, Winterthurerstr. 190, 8057, Zurich, Switzerland
| | - Rolf Kümmerli
- Department of Quantitative Biomedicine, University of Zurich, Winterthurerstr. 190, 8057, Zurich, Switzerland
| | - Laurent Bigler
- Department of Chemistry, University of Zurich, Winterthurerstr. 190, 8057, Zurich, Switzerland.
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3
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Kircheva N, Dudev T. Competition between abiogenic and biogenic metal cations in biological systems: Mechanisms of gallium's anticancer and antibacterial effect. J Inorg Biochem 2020; 214:111309. [PMID: 33212396 DOI: 10.1016/j.jinorgbio.2020.111309] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 11/03/2020] [Accepted: 11/08/2020] [Indexed: 11/29/2022]
Abstract
Metal cations are key players in a plethora of essential biological processes. Over the course of evolution specific biological functions have been bestowed upon two dozen of (biogenic) metal species, some of the most frequently found being sodium, potassium, magnesium, calcium, zinc, manganese, iron, and copper. On the other hand, there is a group of less studied abiogenic metals like lithium, strontium and gallium that possess not known functions in living organisms, but, by mimicking the native ions and/or competing with them for binding to key metalloenzymes, may exert beneficial effect on humans in particular medical conditions. This review summarizes and critically examines the mechanisms of gallium's therapeutic action in anticancer and antibacterial therapies by exploiting the tools of molecular modeling and experimental biochemistry. These approaches allow for identifying key factors for Ga3+ beneficial effect such as the electrostatic interactions with the protein ligands, substrates or bacterial siderophores, intramolecular hydrogen bond formation, and pH and dielectric properties of the medium. Several intriguing questions concerning the gallium competition with the native ferric ion have found their answers.
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Affiliation(s)
- Nikoleta Kircheva
- Institute of Optical Materials and Technologies "Acad. J. Malinowski", Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria.
| | - Todor Dudev
- Faculty of Chemistry and Pharmacy, Sofia University "St. Kl. Ohridski", 1164 Sofia, Bulgaria.
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4
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Kircheva N, Dudev T. Gallium as an Antibacterial Agent: A DFT/SMD Study of the Ga3+/Fe3+ Competition for Binding Bacterial Siderophores. Inorg Chem 2020; 59:6242-6254. [DOI: 10.1021/acs.inorgchem.0c00367] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nikoleta Kircheva
- Institute of Optical Materials and Technologies “Acad. J. Malinowski”, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
| | - Todor Dudev
- Faculty of Chemistry and Pharmacy, Sofia University, 1164 Sofia, Bulgaria
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5
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Nicolafrancesco C, Porcaro F, Pis I, Nappini S, Simonelli L, Marini C, Frangipani E, Visaggio D, Visca P, Mobilio S, Meneghini C, Fratoddi I, Iucci G, Battocchio C. Gallium- and Iron-Pyoverdine Coordination Compounds Investigated by X-ray Photoelectron Spectroscopy and X-ray Absorption Spectroscopy. Inorg Chem 2019; 58:4935-4944. [DOI: 10.1021/acs.inorgchem.8b03574] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Chiara Nicolafrancesco
- Department of Science, Roma Tre University, Via della Vasca Navale 79, 00146 Rome, Italy
| | - Francesco Porcaro
- University of Bordeaux, CNRS, IN2P3, CENBG, UMR 5797, F-33170 Gradignan, France
| | - Igor Pis
- Elettra-Sincrotrone Trieste S.C.p.A., SS 14, km 163,5 Basovizza, I-34149 Trieste, Italy
| | - Silvia Nappini
- IOM-CNR Laboratorio TASC, SS 14, Km 163,5 Basovizza, I-34149 Trieste, Italy
| | - Laura Simonelli
- CELLS—ALBA Synchrotron Radiation Facility, Carrer de la Llum 2-26, 08290 Cerdanyola del Vallès, Barcelona, Spain
| | - Carlo Marini
- CELLS—ALBA Synchrotron Radiation Facility, Carrer de la Llum 2-26, 08290 Cerdanyola del Vallès, Barcelona, Spain
| | - Emanuela Frangipani
- Department of Science, Roma Tre University, Via della Vasca Navale 79, 00146 Rome, Italy
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, 61029 Province of Pesaro and Urbino, Italy
| | - Daniela Visaggio
- Department of Science, Roma Tre University, Via della Vasca Navale 79, 00146 Rome, Italy
| | - Paolo Visca
- Department of Science, Roma Tre University, Via della Vasca Navale 79, 00146 Rome, Italy
| | - Settimio Mobilio
- Department of Science, Roma Tre University, Via della Vasca Navale 79, 00146 Rome, Italy
| | - Carlo Meneghini
- Department of Science, Roma Tre University, Via della Vasca Navale 79, 00146 Rome, Italy
| | | | - Giovanna Iucci
- Department of Science, Roma Tre University, Via della Vasca Navale 79, 00146 Rome, Italy
| | - Chiara Battocchio
- Department of Science, Roma Tre University, Via della Vasca Navale 79, 00146 Rome, Italy
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6
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Ciui B, Tertiş M, Cernat A, Săndulescu R, Wang J, Cristea C. Finger-Based Printed Sensors Integrated on a Glove for On-Site Screening Of Pseudomonas aeruginosa Virulence Factors. Anal Chem 2018; 90:7761-7768. [DOI: 10.1021/acs.analchem.8b01915] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Bianca Ciui
- Analytical Chemistry Department, Iuliu Haţieganu University of Medicine and Pharmacy, Cluj-Napoca 400349, Romania
| | - Mihaela Tertiş
- Analytical Chemistry Department, Iuliu Haţieganu University of Medicine and Pharmacy, Cluj-Napoca 400349, Romania
| | - Andreea Cernat
- Analytical Chemistry Department, Iuliu Haţieganu University of Medicine and Pharmacy, Cluj-Napoca 400349, Romania
| | - Robert Săndulescu
- Analytical Chemistry Department, Iuliu Haţieganu University of Medicine and Pharmacy, Cluj-Napoca 400349, Romania
| | - Joseph Wang
- Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, United States
| | - Cecilia Cristea
- Analytical Chemistry Department, Iuliu Haţieganu University of Medicine and Pharmacy, Cluj-Napoca 400349, Romania
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7
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Bouvier B, Cézard C. Impact of iron coordination isomerism on pyoverdine recognition by the FpvA membrane transporter of Pseudomonas aeruginosa. Phys Chem Chem Phys 2017; 19:29498-29507. [PMID: 29082401 DOI: 10.1039/c7cp04529h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Pyoverdines, the primary siderophores of Pseudomonas bacteria, scavenge the iron essential to bacterial life in the outside medium and transport it back into the periplasm. Despite their relative simplicity, pyoverdines feature remarkably flexible recognition characteristics whose origins at the atomistic level remain only partially understood: the ability to bind other metals than ferric iron, the capacity of outer membrane transporters to recognize and internalize noncognate pyoverdines from other pseudomonads… One of the less examined factors behind this polymorphic recognition lies in the ability for pyoverdines to bind iron with two distinct chiralities, at the cost of a conformational switch. Herein, we use free energy simulations to study how the stereochemistry of the iron chelating groups influences the structure and dynamics of two common pyoverdines and impacts their recognition by the FpvA membrane transporter of P. aeruginosa. We show that conformational preferences for one metal binding chirality over the other, observed in solution depending on the nature of the pyoverdine, are canceled out by the FpvA transporter, which recognizes both chiralities equally well for both pyoverdines under study. However, FpvA discriminates between pyoverdines by altering the kinetics of stereoisomer interconversion. We present structural causes of this intriguing recognition mechanism and discuss its possible significance in the context of the competitive scavenging of iron.
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Affiliation(s)
- Benjamin Bouvier
- Laboratoire de Glycochimie, des Antimicrobiens et des Agroressources, CNRS UMR7378/Université de Picardie Jules Verne, 10 rue Baudelocque, 80039 Amiens Cedex, France.
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8
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Schalk IJ, Cunrath O. An overview of the biological metal uptake pathways in Pseudomonas aeruginosa. Environ Microbiol 2016; 18:3227-3246. [PMID: 27632589 DOI: 10.1111/1462-2920.13525] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 09/07/2016] [Indexed: 12/21/2022]
Abstract
Biological metal ions, including Co, Cu, Fe, Mg, Mn, Mo, Ni and Zn ions, are necessary for the survival and the growth of all microorganisms. Their biological functions are linked to their particular chemical properties: they play a role in structuring macromolecules and/or act as co-factors catalyzing diverse biochemical reactions. These metal ions are also essential for microbial pathogens during infection: they are involved in bacterial metabolism and various virulence factor functions. Therefore, during infection, bacteria need to acquire biological metal ions from the host such that there is competition for these ions between the bacterium and the host. Evidence is increasingly emerging of "nutritional immunity" against pathogens in the hosts; this includes strategies making access to metals difficult for infecting bacteria. It is clear that biological metals play key roles during infection and in the battle between the pathogens and the host. Here, we summarize current knowledge about the strategies used by Pseudomonas aeruginosa to access the various biological metals it requires. P. aeruginosa is a medically significant Gram-negative bacterial opportunistic pathogen that can cause severe chronic lung infections in cystic fibrosis patients and that is responsible for nosocomial infections worldwide.
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Affiliation(s)
- Isabelle J Schalk
- UMR 7242, Université de Strasbourg-CNRS, ESBS, Blvd Sébastien Brant, F-67413, Illkirch, Strasbourg, France.
| | - Olivier Cunrath
- UMR 7242, Université de Strasbourg-CNRS, ESBS, Blvd Sébastien Brant, F-67413, Illkirch, Strasbourg, France
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9
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Cellular organization of siderophore biosynthesis in Pseudomonas aeruginosa: Evidence for siderosomes. J Inorg Biochem 2015; 148:27-34. [PMID: 25697961 DOI: 10.1016/j.jinorgbio.2015.01.017] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Revised: 01/27/2015] [Accepted: 01/27/2015] [Indexed: 11/24/2022]
Abstract
Pyoverdine I (PVDI) and pyochelin (PCH) are the two major siderophores produced by Pseudomonas aeruginosa PAO1 to import iron. The biochemistry of the biosynthesis of these two siderophores has been described in detail in the literature over recent years. PVDI assembly requires the coordinated action of seven cytoplasmic enzymes and is followed by a periplasmic maturation before secretion of the siderophore into the extracellular medium by the efflux system PvdRT-OpmQ. PCH biosynthesis also involves seven cytoplasmic enzymes but no periplasmic maturation. Recent findings indicate that the cytoplasmic enzymes involved in each of these two siderophore biosynthesis pathways can form siderophore-specific multi-enzymatic complexes called siderosomes associated with the inner leaflet of the cytoplasmic membrane. This organization may optimize the transfer of the siderophore precursors between the various participating enzymes and avoid the diffusion of siderophore precursors, able to chelate metals, throughout the cytoplasm. Here, we describe these recently published findings and discuss the existence of these siderosomes in P. aeruginosa.
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10
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Schalk IJ, Mislin GLA, Brillet K. Structure, function and binding selectivity and stereoselectivity of siderophore-iron outer membrane transporters. CURRENT TOPICS IN MEMBRANES 2012; 69:37-66. [PMID: 23046646 DOI: 10.1016/b978-0-12-394390-3.00002-1] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
To get access to iron, microorganisms produce and release into their environment small organic metal chelators called siderophores. In parallel, they produce siderophore-iron outer membrane transporters (also called TonB-Dependent Transporters or TBDT) embedded in the outer membrane; these proteins actively reabsorb the siderophore loaded with iron from the extracellular medium. This active uptake requires energy in the form of the proton motive force transferred from the inner membrane to the outer membrane transporter via the inner membrane TonB complex. Siderophores produced by microorganisms are structurally very diverse with molecular weights of 150 up to 2000Da. Siderophore-iron uptake from the extracellular medium by TBDTs is a highly selective and sometimes even stereoselective process, with each siderophore having a specific TBDT. Unlike the siderophores, all TBDTs have similar structures and belong to the outer membrane β-barrel protein superfamily. The way in which the siderophore-iron complex passes through the TBDT is still unclear. In some bacteria, TBDTs are also partners of signaling cascades regulating the expression of proteins involved in siderophore biosynthesis and siderophore-iron acquisition.
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Affiliation(s)
- Isabelle J Schalk
- UMR 7242, Université de Strasbourg-CNRS, ESBS, Boulevard Sébastien Brant, Strasbourg, France.
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11
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Willemse-Erix DFM, Jachtenberg JW, Schut TB, van Leeuwen W, van Belkum A, Puppels G, Maquelin K. Towards Raman-based epidemiological typing of Pseudomonas aeruginosa. JOURNAL OF BIOPHOTONICS 2010; 3:506-511. [PMID: 20572285 DOI: 10.1002/jbio.201000026] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Raman spectra of bacteria can be used as highly specific fingerprints, enabling discrimination at strain level. Pseudomonas aeruginosa strains can be strongly pigmented, making it difficult to obtain high quality spectra of such isolates due to high fluorescent spectral backgrounds. Furthermore, the spectra that could be measured with acceptable quality often showed large spectral variations limiting the reproducibility required for strain level discrimination. P. aeruginosa produces a characteristic yellowish green fluorescent pigment, called pyoverdin. Applying a washing procedure to reduce the amount of fluorescent pigment, enabled the highly pigmented isolates to be measured with sufficient spectral quality. Isolation of the pigment/pyoverdin spectral features, together with spectral scaling methods improved reproducibility. It will be important to analyze the range of the spectral variations that can occur and ensure the correction of all of these factors to obtain the highest reproducibility required for strain level typing.
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Affiliation(s)
- Diana F M Willemse-Erix
- Department of Medical Microbiology and Infectious Diseases, Erasmus Medical Center, Rotterdam, The Netherlands
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12
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Greenwald J, Nader M, Celia H, Gruffaz C, Geoffroy V, Meyer JM, Schalk IJ, Pattus F. FpvA bound to non-cognate pyoverdines: molecular basis of siderophore recognition by an iron transporter. Mol Microbiol 2009; 72:1246-59. [PMID: 19504741 DOI: 10.1111/j.1365-2958.2009.06721.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first step in the specific uptake of iron via siderophores in Gram-negative bacteria is the recognition and binding of a ferric siderophore by its cognate receptor. We investigated the molecular basis of this event through structural and biochemical approaches. FpvA, the pyoverdine-Fe transporter from Pseudomonas aeruginosa ATCC 15692 (PAO1 strain), is able to transport ferric-pyoverdines originating from other species, whereas most fluorescent pseudomonads are only able to use the one they produce among the more than 100 known different pyoverdines. We solved the structure of FpvA bound to non-cognate pyoverdines of high- or low-affinity and found a close correlation between receptor-ligand structure and the measured affinities. The structure of the first amino acid residues of the pyoverdine chain distinguished the high- and low-affinity binders while the C-terminal portion of the pyoverdines, often cyclic, does not appear to contribute extensively to the interaction between the siderophore and its transporter. The specificity of the ferric-pyoverdine binding site of FpvA is conferred by the structural elements common to all ferric-pyoverdines, i.e. the chromophore, iron, and its chelating groups.
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Affiliation(s)
- Jason Greenwald
- Laboratoire de Biologie Structurale des Membranes, UMR7175, Ecole Supérieure de Biotechnologie de Strasbourg, Bd Sébastien Brant, BP10413, 67412 Illkirch, France.
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13
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Iron acquisition by Pseudomonas aeruginosa in the lungs of patients with cystic fibrosis. Biometals 2009; 22:53-60. [PMID: 19130260 DOI: 10.1007/s10534-008-9197-9] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2008] [Accepted: 12/07/2008] [Indexed: 12/30/2022]
Abstract
The bacterium Pseudomonas aeruginosa is commonly isolated from the general environment and also infects the lungs of patients with cystic fibrosis (CF). Iron in mammals is not freely available to infecting pathogens although significant amounts of extracellular iron are available in the sputum that occurs in the lungs of CF patients. P. aeruginosa has a large number of systems to acquire this essential nutrient and many of these systems have been characterised in the laboratory. However, which iron acquisition systems are active in CF is not well understood. Here we review recent research that sheds light on how P. aeruginosa obtains iron in the lungs of CF patients.
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