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Hagen WR. The Development of Tungsten Biochemistry-A Personal Recollection. Molecules 2023; 28:molecules28104017. [PMID: 37241758 DOI: 10.3390/molecules28104017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 04/27/2023] [Accepted: 05/08/2023] [Indexed: 05/28/2023] Open
Abstract
The development of tungsten biochemistry is sketched from the viewpoint of personal participation. Following its identification as a bio-element, a catalogue of genes, enzymes, and reactions was built up. EPR spectroscopic monitoring of redox states was, and remains, a prominent tool in attempts to understand tungstopterin-based catalysis. A paucity of pre-steady-state data remains a hindrance to overcome to this day. Tungstate transport systems have been characterized and found to be very specific for W over Mo. Additional selectivity is presented by the biosynthetic machinery for tungstopterin enzymes. Metallomics analysis of hyperthermophilic archaeon Pyrococcus furiosus indicates a comprehensive inventory of tungsten proteins.
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Affiliation(s)
- Wilfred R Hagen
- Department of Biotechnology, Delft University of Technology, Building 58, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
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2
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INTERACTION OF OBLIGATE ANAEROBIC DESTROYER OF SOLID ORGANIC WASTE Clostridium butyricum GMP1 WITH SOLUBLE COMPOUNDS OF TOXIC METALS Cr(VI), Mo(VI) AND W(VI). BIOTECHNOLOGIA ACTA 2020. [DOI: 10.15407/biotech13.05.073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Increasing pollution of environment by toxic metals is the urgent problem requiring effective solution worldwide. The goal of the work was to study the dynamics of the interaction of Cr(VI), Mo(VI), W(VI) compounds with obligate anaerobic microorganisms Clostridium butyricum GMP1, which ferment organic compounds with the synthesis of hydrogen. The standard methods were used to determine рН and redox potential (Eh), the gas composition, and the concentration of metals. The application Clostridium butyricum GMP1 was showed to be useful to investigate its interaction with toxic metals. The higher redox potential of metal provided the opportunity for its faster and more effective reduction. The patterns of the reduction of toxic metals Cr(VI), Mo(VI) and W(VI) by obligate anaerobic strain Clostridium butyricum GMP1 were obtained. The experimental data confirmed the thermodynamically calculated correlation between the redox potential of the metal reduction to insoluble form and effectiveness of its removal. Obtained results can serve as the basis for further optimization and development of environmental biotechnologies for wastewater treatment with the simultaneous destruction of solid organic waste and hydrogen synthesis.
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Habib U, Hoffman M. Effect of molybdenum and tungsten on the reduction of nitrate in nitrate reductase, a DFT study. Chem Cent J 2017; 11:35. [PMID: 29086812 PMCID: PMC5405038 DOI: 10.1186/s13065-017-0263-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 04/11/2017] [Indexed: 12/03/2022] Open
Abstract
The molybdenum and tungsten active site model complexes, derived from the protein X-ray crystal structure of the first W-containing nitrate reductase isolated from Pyrobaculum aerophilum, were computed for nitrate reduction at the COSMO-B3LYP/SDDp//B3LYP/Lanl2DZ(p) energy level of density functional theory. The molybdenum containing active site model complex (Mo–Nar) has the largest activation energy (34.4 kcal/mol) for the oxygen atom transfer from the nitrate to the metal center as compared to the tungsten containing active site model complex (W–Nar) (12.0 kcal/mol). Oxidation of the educt complex is close to thermoneutral (−1.9 kcal/mol) for the Mo active site model complex but strongly exothermic (−34.7 kcal/mol) for the W containing active site model complex, however, the MVI to MIV reduction requires equal amount of reductive power for both metal complexes, Mo–Nar or W–Nar.
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Affiliation(s)
- Uzma Habib
- Research Center for Modeling and Simulation (RCMS), National University of Science and Technology (NUST), H-12, Islamabad, Pakistan.
| | - Matthias Hoffman
- Institute of Inorganic Chemistry, Heidelberg University, Heidelberg, Germany
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4
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Gupta R, Sheikh HN, Kalsotra BL, Singh V. Synthesis and characterization of isothiocyanato complexes of dioxotungsten(VI) with mannich base ligands: Precursors for the preparation of pure phase nanosized tungsten(VI) trioxide. JOURNAL OF SAUDI CHEMICAL SOCIETY 2016. [DOI: 10.1016/j.jscs.2013.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Mondal P, Ray R, Das A, Lahiri GK. Revelation of Varying Bonding Motif of Alloxazine, a Flavin Analogue, in Selected Ruthenium(II/III) Frameworks. Inorg Chem 2015; 54:3012-21. [DOI: 10.1021/acs.inorgchem.5b00122] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Prasenjit Mondal
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, India 400076
| | - Ritwika Ray
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, India 400076
| | - Ankita Das
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, India 400076
| | - Goutam Kumar Lahiri
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, India 400076
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6
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Holm RH, Solomon EI, Majumdar A, Tenderholt A. Comparative molecular chemistry of molybdenum and tungsten and its relation to hydroxylase and oxotransferase enzymes. Coord Chem Rev 2011. [DOI: 10.1016/j.ccr.2010.10.017] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Zhang Y, Gladyshev VN. Comparative Genomics of Trace Elements: Emerging Dynamic View of Trace Element Utilization and Function. Chem Rev 2009; 109:4828-61. [DOI: 10.1021/cr800557s] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Yan Zhang
- Department of Biochemistry and Redox Biology Center, University of Nebraska, Lincoln, Nebraska 68588-0664
| | - Vadim N. Gladyshev
- Department of Biochemistry and Redox Biology Center, University of Nebraska, Lincoln, Nebraska 68588-0664
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9
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Hrobárik P, Malkina OL, Malkin VG, Kaupp M. Relativistic two-component calculations of electronic g-tensor for oxo-molybdenum(V) and oxo-tungsten(V) complexes: The important role of higher-order spin-orbit contributions. Chem Phys 2009. [DOI: 10.1016/j.chemphys.2008.10.028] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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10
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Saleem M, Sharma M, Sheikh HN, Kalsotra BL. Mixed ligand complexes of tungsten(VI) containing aroyl hydrazones and isothiocyanate. J COORD CHEM 2008. [DOI: 10.1080/00958970801914058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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Xiaoming L, Zhen W, Chunxia W, Man L, Chaohui Y. Synthesis and structures of cis -WO 2 complexes with 2,3-dihydroxynaphthalene. J COORD CHEM 2008. [DOI: 10.1080/00958970701595981] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Lu Xiaoming
- a Department of Chemistry , Capital Normal University , Beijing 100037, China
- b Wuhan Institute of Physics and Mathematics , Wuhan, 430071, China
| | - Wang Zhen
- a Department of Chemistry , Capital Normal University , Beijing 100037, China
| | - Wei Chunxia
- a Department of Chemistry , Capital Normal University , Beijing 100037, China
| | - Liu Man
- a Department of Chemistry , Capital Normal University , Beijing 100037, China
| | - Ye Chaohui
- b Wuhan Institute of Physics and Mathematics , Wuhan, 430071, China
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12
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Pantazis DA, Chen XY, Landis CR, Neese F. All-Electron Scalar Relativistic Basis Sets for Third-Row Transition Metal Atoms. J Chem Theory Comput 2008; 4:908-19. [DOI: 10.1021/ct800047t] [Citation(s) in RCA: 872] [Impact Index Per Article: 54.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dimitrios A. Pantazis
- Lehrstuhl für Theoretische Chemie, Institut für Physikalische und Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany, and Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706
| | - Xian-Yang Chen
- Lehrstuhl für Theoretische Chemie, Institut für Physikalische und Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany, and Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706
| | - Clark R. Landis
- Lehrstuhl für Theoretische Chemie, Institut für Physikalische und Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany, and Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706
| | - Frank Neese
- Lehrstuhl für Theoretische Chemie, Institut für Physikalische und Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany, and Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706
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13
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Andreesen JR, Makdessi K. Tungsten, the surprisingly positively acting heavy metal element for prokaryotes. Ann N Y Acad Sci 2007; 1125:215-29. [PMID: 18096847 DOI: 10.1196/annals.1419.003] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The history and changing function of tungsten as the heaviest element in biological systems is given. It starts from an inhibitory element/anion, especially for the iron molybdenum-cofactor (FeMoCo)-containing enzyme nitrogenase involved in dinitrogen fixation, as well as for the many "metal binding pterin" (MPT)-, also known as tricyclic pyranopterin- containing classic molybdoenzymes, such as the sulfite oxidase and the xanthine dehydrogenase family of enzymes. They are generally involved in the transformation of a variety of carbon-, nitrogen- and sulfur-containing compounds. But tungstate can serve as a potential positively acting element for some enzymes of the dimethyl sulfoxide (DMSO) reductase family, especially for CO(2)-reducing formate dehydrogenases (FDHs), formylmethanofuran dehydrogenases and acetylene hydratase (catalyzing only an addition of water, but no redox reaction). Tungsten even becomes an essential element for nearly all enzymes of the aldehyde oxidoreductase (AOR) family. Due to the close chemical and physical similarities between molybdate and tungstate, the latter was thought to be only unselectively cotransported or cometabolized with other tetrahedral anions, such as molybdate and also sulfate. However, it has now become clear that it can also be very selectively transported compared to molybdate into some prokaryotic cells by two very selective ABC-type of transporters that contain a binding protein TupA or WtpA. Both proteins exhibit an extremely high affinity for tungstate (K(D) < 1 nM) and can even discriminate between tungstate and molybdate. By that process, tungsten finally becomes selectively incorporated into the few enzymes noted above.
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Affiliation(s)
- Jan R Andreesen
- Institute of Biology/Microbiology, Martin-Luther-University Halle-Wittenberg, Halle, Germany.
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14
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Lu XM, Pei XH, Wang XJ, Ye CH. The Reaction of Molybdenum with 2,3-Dihydroxynaphthalene. CHINESE J CHEM 2007. [DOI: 10.1002/cjoc.200790085] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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15
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Pathania MS, Sheikh HN, Kalsotra BL. Dipyridinium tetraisothiocyanatodioxotungstate(VI) and related compounds. RUSS J COORD CHEM+ 2007. [DOI: 10.1134/s1070328407040069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Xiaoming L, Bo W, Fugen S, Jing W, Chaohui Y. Synthesis, structure and NMR of cis-dioxotungsten (VI) complexes with 2-methoxypyridine and 2,3-dihydroxynaphthalene bidentate ligands. J Mol Struct 2006. [DOI: 10.1016/j.molstruc.2005.12.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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17
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Arzoumanian H, Agrifoglio G, Capparelli MV, Atencio R, Briceño A, Alvarez-Larena A. Synthesis and characterization of thiocyanato and chlorodioxo tungsten(VI) compounds: Comparative oxygen atom transfer capability with molybdenum analogs. Inorganica Chim Acta 2006. [DOI: 10.1016/j.ica.2005.08.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Wong YL, Cowley AR, Dilworth JR. Synthesis, structures, electrochemistry and properties of dioxo-molybdenum(VI) and -tungsten(VI) complexes with novel asymmetric N2OS, and partially symmetric N2S2, NOS2 N-capped tripodal ligands. Inorganica Chim Acta 2004. [DOI: 10.1016/j.ica.2004.07.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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19
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Moura JJG, Brondino CD, Trincão J, Romão MJ. Mo and W bis-MGD enzymes: nitrate reductases and formate dehydrogenases. J Biol Inorg Chem 2004; 9:791-9. [PMID: 15311335 DOI: 10.1007/s00775-004-0573-9] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2004] [Accepted: 06/14/2004] [Indexed: 10/26/2022]
Abstract
Molybdenum and tungsten are second- and third-row transition elements, respectively, which are found in a mononuclear form in the active site of a diverse group of enzymes that generally catalyze oxygen atom transfer reactions. Mononuclear Mo-containing enzymes have been classified into three families: xanthine oxidase, DMSO reductase, and sulfite oxidase. The proteins of the DMSO reductase family present the widest diversity of properties among its members and our knowledge about this family was greatly broadened by the study of the enzymes nitrate reductase and formate dehydrogenase, obtained from different sources. We discuss in this review the information of the better characterized examples of these two types of Mo enzymes and W enzymes closely related to the members of the DMSO reductase family. We briefly summarize, also, the few cases reported so far for enzymes that can function either with Mo or W at their active site.
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Affiliation(s)
- José J G Moura
- REQUIMTE/CQFB, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.
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20
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Hagedoorn PL, Hagen WR, Stewart LJ, Docrat A, Bailey S, Garner CD. Redox characteristics of the tungsten DMSO reductase ofRhodobacter capsulatus. FEBS Lett 2003; 555:606-10. [PMID: 14675782 DOI: 10.1016/s0014-5793(03)01359-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The dimethylsulfoxide reductase (DMSOR) from Rhodobacter capsulatus is known to retain its three-dimensional structure and enzymatic activity upon substitution of molybdenum, the metal that occurs naturally at the active site, by tungsten. The redox properties of tungsten-substituted DMSOR (W-DMSOR) have been investigated by a dye-mediated reductive titration with the concentration of the W(V) state monitored by EPR spectroscopy. At pH 7.0, E(m)(W(VI)/W(V)) is -194 mV and E(m)(W(V)/W(IV)) is -134 mV. Each E(m) value of W-DMSOR is significantly lower (220 and 334 mV, respectively) than that of the corresponding couple of Mo-DMSOR. These redox potentials are consistent with the ability of Mo-DMSOR to catalyze both the reduction of DMSO to DMS and the back reaction, whereas W-DMSOR is very effective in catalyzing the forward reaction, but shows no ability to catalyze the oxidation of DMS to DMSO.
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Affiliation(s)
- Peter Leon Hagedoorn
- Kluyver Department of Biotechnology, Delft University of Technology, Julianalaan 67, 2628 BC, Delft, The Netherlands.
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21
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Sugimoto H, Siren K, Tsukube H, Tanaka K. Mono-Dithiolene Molybdenum(IV) Complexes of cis-1,2-Dicyano-1,2-ethylenedithiolate (mnt2): New Models for Molybdenum Enzymes. Eur J Inorg Chem 2003. [DOI: 10.1002/ejic.200200638] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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Hagedoorn PL, van't Slot P, van Leeuwen HP, Hagen WR. Electroanalytical determination of tungsten and molybdenum in proteins. Anal Biochem 2001; 297:71-8. [PMID: 11567529 DOI: 10.1006/abio.2001.5300] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Recent crystal structure determinations accelerated the progress in the biochemistry of tungsten-containing enzymes. In order to characterize these enzymes, a sensitive determination of this metal in protein-containing samples is necessary. An electroanalytical tungsten determination has successfully been adapted to determine the tungsten and molybdenum content in enzymes. The tungsten and molybdenum content can be measured simultaneously from 1 to 10 microg of purified protein with little or no sample handling. More crude protein samples require precipitation of interfering surface active material with 10% perchloric acid. This method affords the isolation of novel molybdenum- and tungsten-containing proteins via molybdenum and tungsten monitoring of column fractions, without using radioactive isotopes. A screening of soluble proteins from Pyrococcus furiosus for tungsten, using anion-exchange column chromatography to separate the proteins, has been performed. The three known tungsten-containing enzymes from P. furiosus were recovered with this screening.
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Affiliation(s)
- P L Hagedoorn
- Kluyver Department of Biotechnology, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands.
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23
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Thapper A, Balmes O, Lorber C, Svensson PH, Holm R, Nordlander E. Synthesis and structural characterization of two tungsten(VI) dioxo complexes with N,O- and N,S-coordinating ligands. Inorganica Chim Acta 2001. [DOI: 10.1016/s0020-1693(01)00509-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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24
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Hornung FM, Heilmann O, Kaim W, Zalis S, Fiedler J. Metal vs ligand reduction in complexes of 1,3-dimethylalloxazine (DMA) with copper(I), ruthenium(II), and tungsten(VI). Crystal structures of (DMA)WO2Cl2 and (bis(1-methylimidazol-2-yl)ketone)WO2Cl2. Inorg Chem 2000; 39:4052-8. [PMID: 11198860 DOI: 10.1021/ic0001816] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The complexes [(DMA)Cu(PPh3)2](BF4) (1) (DMA = 1,3-dimethylalloxazine), [(DMA)Ru(bpy)2](PF6)2 (2), and (DMA)WO2Cl2 (3) were obtained as O4-N5-chelated species, as evident from an X-ray crystal structure analysis for 3 and from spectroscopy (NMR, IR, and UV-vis spectroelectrochemistry) for 1 and 2. The tungsten(VI) center in 3 has its oxide ligands in a cis/equatorial position and the chloride ligands in a trans/axial position; it also exhibits a relatively short bond to O4 (2.232(3) A) and a very long bond to N5 (2.462(3) A). Comparison with the new structurally characterized compound (BIK)WO2Cl2 (4) (BIK = bis(1-methylimidazol-2-yl)ketone), which has W-N bonds of about 2.30 A, confirms the unusual length of the W-N bond in 3, probably caused by repulsion between one of the oxo ligands and the peri-hydrogen atom (H6) of DMA. One-electron reduction of the complexes occurs reversibly at room temperature in THF (1, 2) or at 198 K in CH2Cl2 (3). EPR spectroscopy reveals that this process is ligand-centered for 1 and 2 but metal-centered for 3. Density functional methods and ab initio methodology are used to illustrate the correspondence in spin distribution between the radical anion pi systems of alloxazine and isoalloxazine ("flavosemiquinone").
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Affiliation(s)
- F M Hornung
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
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Stewart LJ, Bailey S, Bennett B, Charnock JM, Garner CD, McAlpine AS. Dimethylsulfoxide reductase: an enzyme capable of catalysis with either molybdenum or tungsten at the active site. J Mol Biol 2000; 299:593-600. [PMID: 10835270 DOI: 10.1006/jmbi.2000.3702] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
DMSO reductase (DMSOR) from Rhodobacter capsulatus, well-characterised as a molybdoenzyme, will bind tungsten. Protein crystallography has shown that tungsten in W-DMSOR is ligated by the dithiolene group of the two pyranopterins, the oxygen atom of Ser147 plus another oxygen atom, and is located in a very similar site to that of molybdenum in Mo-DMSOR. These conclusions are consistent with W L(III)-edge X-ray absorption, EPR and UV/visible spectroscopic data. W-DMSOR is significantly more active than Mo-DMSOR in catalysing the reduction of DMSO but, in contrast to the latter, shows no significant ability to catalyse the oxidation of DMS.
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Affiliation(s)
- L J Stewart
- CLRC Daresbury Laboratory, Daresbury, Warrington, Cheshire, WA4 4AD, UK
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Sung KM, Holm RH. Synthesis and structures of bis(dithiolene)-tungsten(IV) complexes related to the active sites of tungstoenzymes. Inorg Chem 2000; 39:1275-81. [PMID: 12526419 DOI: 10.1021/ic991153u] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Recent protein crystallographic results on tungsten enzymes and primary sequence relationships between certain molybdenum and tungsten enzymes provoke interest in the generalized bis(dithiolene) complexes [WIV(QR)(S2C2R'2)2]1- and [WVIO(QR)(S2C2R'2)2]1- (Q = O, S, Se) as minimal representations of enzyme sites. The existence and stability of W(IV) complexes have been explored by synthesis. Reaction of [W(CO)2(S2C2Me2)2] (1) with PhO- results in complete CO substitution to give [W(OPh)(S2C2Me2)2]1- (2). Reaction of 1 with PhQ- affords the monocarbonyls [W(CO)(QPh)(S2C2Me2)2]1- (Q = S (3), Se (5)). The use of sterically demanding 2,4,6-Pri3C6H2Q- also yields monocarbonyls, [W(CO)(QC6H2-2,4,6-Pri3)(S2C2Me2)2]1- (Q = S (4), Se (6)). The X-ray structures of square pyramidal 2 and trigonal prismatic 3-6 (with unidentate ligands cis) are described. The tendency to substitute one or both carbonyl ligands in 1 in the formation of [MIV(QAr)(S2C2Me2)2]1- and [MIV(CO)(QAr)(SeC2Me2)2]1- with M = Mo and W is related to the M-Q bond length and ligand steric demands. The results demonstrate a stronger binding of CO by W(IV) than Mo(IV), a behavior previously demonstrated by thermodynamic and kinetic features of zerovalent carbonyl complexes. Complexes 3-6 can be reversibly reduced to W(III) at approximately -1.5 V versus SCE. On the basis of the potential for 2(-2.07 V), monocarbonyl ligation stabilizes W(III) by approximately 500 mV. This work is part of a parallel investigation of the chemistry of bis(dithiolene)-molybdenum (Lim, B. S.; Donahue, J. P.; Holm, R. H. Inorg. Chem. 2000, 39, 263) and -tungsten complexes related to enzyme active sites.
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Affiliation(s)
- K M Sung
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA
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Zális S, Stoll H, Baerends EJ, Kaim W. The d(0), d(1) and d(2) Configurations in Known and Unknown Tetrathiometal Compounds MS(4)(n)()(-) (M = Mo, Tc, Ru; W, Re, Os). A Quantum Chemical Study. Inorg Chem 1999; 38:6101-6105. [PMID: 11671319 DOI: 10.1021/ic990891f] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The known tetrathiometalates MoS(4)(2)(-)(/3)(-), WS(4)(2)(-)(/3)(-), ReS(4)(-)(/2)(-)(/3)(-), and the unknown species TcS(4)(-)(/2)(-), RuS(4)(0/)(-), and OsS(4)(0/)(-)(/2)(-) were calculated using ab initio and DFT methods. The one-electron reduced species with d(1) configuration were shown to exhibit a slight Jahn-Teller distortion (T(d)() --> D(2)(d)()); the largest corresponding stabilization energy was obtained for MoS(4)(3)(-) with -4.17 kcal/mol. Trends in vacuum bonding energies involve a destabilization on going from 5d(n)() to 4d(n)() systems and on reduction from d(0) to d(1) species, with the exception of Ru and Os complexes where the d(1) configurations are more stable than the d(0) forms. The d(2) species ReS(4)(3)(-) and OsS(4)(2)(-) have vacuum bonding energies similar to those of d(1) analogues. The metal contribution to the lowest unoccupied MO (e) of d(0) forms is lowest for the neutral RuS(4) and OsS(4) and highest for the dianions MoS(4)(2)(-) and WS(4)(2)(-). The DFT approach supported by correlated ab initio calculations describes the main features of the electronic spectra of the d(0) complexes. For the experimentally best accessible ReS(4)(n)()(-) system the absorption energies and stretching frequencies were well reproduced, and the related but hitherto unknown OsS(4)(-) ion is predicted to be a fairly stable paramagnetic species.
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Affiliation(s)
- Stanislav Zális
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejskova 3, CZ-18223 Prague, Czech Republic, Institut für Theoretische Chemie der Universität, Pfaffenwaldring 55, D-70550 Stuttgart, Germany, Afdeling Theoretische Chemie, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, and Institut für Anorganische Chemie der Universität, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
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Musgrave KB, Donahue JP, Lorber C, Holm RH, Hedman B, Hodgson KO. An X-ray Spectroscopic Investigation of Bis(dithiolene)molybdenum(IV,V,VI) and -tungsten(IV,V,VI) Complexes: Symmetrized Structural Representations of the Active Sites of Molybdoenzymes in the DMSO Reductase Family and of Tungstoenzymes in the AOR and F(M)DH Families. J Am Chem Soc 1999. [DOI: 10.1021/ja990753p] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kristin B. Musgrave
- Contribution from the Department of Chemistry, Stanford University, Stanford, California 94305, Stanford Synchrotron Radiation Laboratory, SLAC, Stanford University, Stanford, California 94309, and the Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138
| | - James P. Donahue
- Contribution from the Department of Chemistry, Stanford University, Stanford, California 94305, Stanford Synchrotron Radiation Laboratory, SLAC, Stanford University, Stanford, California 94309, and the Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138
| | - Christian Lorber
- Contribution from the Department of Chemistry, Stanford University, Stanford, California 94305, Stanford Synchrotron Radiation Laboratory, SLAC, Stanford University, Stanford, California 94309, and the Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138
| | - R. H. Holm
- Contribution from the Department of Chemistry, Stanford University, Stanford, California 94305, Stanford Synchrotron Radiation Laboratory, SLAC, Stanford University, Stanford, California 94309, and the Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138
| | - Britt Hedman
- Contribution from the Department of Chemistry, Stanford University, Stanford, California 94305, Stanford Synchrotron Radiation Laboratory, SLAC, Stanford University, Stanford, California 94309, and the Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138
| | - Keith O. Hodgson
- Contribution from the Department of Chemistry, Stanford University, Stanford, California 94305, Stanford Synchrotron Radiation Laboratory, SLAC, Stanford University, Stanford, California 94309, and the Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138
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Goddard CA, Holm RH. Synthesis and Reactivity Aspects of the Bis(dithiolene) Chalcogenide Series [WIVQ(S2C2R2)2]2- (Q = O, S, Se). Inorg Chem 1999. [DOI: 10.1021/ic9903329] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Christine A. Goddard
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138
| | - R. H. Holm
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138
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