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Bari SE, Olabe JA, Slep LD. Three Redox States of Metallonitrosyls in Aqueous Solution. ADVANCES IN INORGANIC CHEMISTRY 2015. [DOI: 10.1016/bs.adioch.2014.10.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Broclawik E, Stępniewski A, Radoń M. Nitric oxide as a non-innocent ligand in (bio-)inorganic complexes: spin and electron transfer in Fe(II)-NO bond. J Inorg Biochem 2014; 136:147-53. [PMID: 24495545 DOI: 10.1016/j.jinorgbio.2014.01.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 01/10/2014] [Accepted: 01/10/2014] [Indexed: 11/27/2022]
Abstract
The nature of electron density transfer upon bond formation between NO ligand and Fe(II) center is analyzed on the basis of DFT calculation for two {Fe-NO}(7) complexes with entirely diverse geometric and electronic structures: Fe(II)P(NH3)NO (with bent Fe-N-O unit) and [Fe(II)(H2O)5(NO)](2+) (with linear Fe-N-O structure). Proper identification of an electronic status of the fragments, "prepared" to make a bond, was found necessary to get meaningful resolution of charge and spin transfer processes from a spin-resolved analysis of natural orbitals for chemical valence. The Fe(II)P(NH3)NO adduct (built of NO(0) (S=1/2) and Fe(II)P(NH3) (S=0) fragments) showed a strong π*-backdonation competing with spin transfer via a σ-donation, yielding significant red-shift of the NO stretching frequency. [Fe(II)(H2O)5(NO)](2+) (built of NO(0) (S=1/2) antiferromagnetically coupled to Fe(II)(H2O)5 (S=2) fragment) gave no noticeable charge or spin transfer between fragments; a slight blue-shift of the NO stretching frequency could be related to a residual π-donation due to weak π-bonding.
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Affiliation(s)
- Ewa Broclawik
- Jerzy Haber Institute of Catalysis PAS, ul. Niezapominajek 8, 30-239 Krakow, Poland.
| | - Adam Stępniewski
- Jerzy Haber Institute of Catalysis PAS, ul. Niezapominajek 8, 30-239 Krakow, Poland
| | - Mariusz Radoń
- Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060 Krakow, Poland
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New members of a class of dinitrosyliron complexes (DNICs): The characteristic EPR signal of the six-coordinate and five-coordinate {Fe(NO)2}9 DNICs. J Inorg Biochem 2012; 113:83-93. [DOI: 10.1016/j.jinorgbio.2012.03.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2012] [Revised: 03/16/2012] [Accepted: 03/21/2012] [Indexed: 11/22/2022]
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Radoń M, Broclawik E, Pierloot K. Electronic structure of selected FeNO7 complexes in heme and non-heme architectures: a density functional and multireference ab initio study. J Phys Chem B 2010; 114:1518-28. [PMID: 20047294 DOI: 10.1021/jp910220r] [Citation(s) in RCA: 134] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The multiconfigurational CASSCF/CASPT2 approach, along with various functionals of density functional theory, is applied to selected iron(II)-nitrosyl ({FeNO}(7)) complexes, both with heme and nonheme groups. The energetics of the lowest doublet and quartet spin states at the correlated ab initio (CASPT2) level is presented for the first time. Comparison of the CASSCF and (unrestricted) DFT spin densities indicates that the nonhybrid functionals yield the spin densities most closely to the ab initio ones. The analysis of the multiconfigurational CASSCF wave function in terms of the localized active orbitals allows one to resolve the nature of Fe-NO bonding as a mixture of Fe(II)-NO(0) and Fe(III)-NO(-) resonance structures (in comparable contributions) for both spin states and various ligands.
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Affiliation(s)
- Mariusz Radoń
- Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060 Kraków, Poland
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A study of NO trafficking from dinitrosyl-iron complexes to the recombinant E. coli transcriptional factor SoxR. J Biol Inorg Chem 2008; 13:961-72. [PMID: 18449575 DOI: 10.1007/s00775-008-0383-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2008] [Accepted: 04/18/2008] [Indexed: 10/22/2022]
Abstract
SoxR is a transcriptional factor in Escherichia coli that induces the expression of SoxS to initiate the production of enzymes in response to oxidative stress. In addition to superoxide, SoxR is also sensitive to cellular NO to produce a protein-bound dinitrosyl-iron complex (DNIC) with a characteristic electron paramagnetic resonance (EPR) signal at g(av)=2.03. Toward developing a strategy for NO sensing based on this property of SoxR, we have overexpressed and purified the recombinant His-tagged SoxR protein. Upon treatment of the purified protein under anaerobic conditions with (1) NO solution, (2) S-nitrosothiol (RSNO), and (3) chemically synthesized low molecular weight DNICs (LMW-DNICs), we have observed enhancement of the EPR signal at g(av)=2.03 from the protein-bound DNICs over time, reflecting the redistribution of NO from the NO solution, RSNO and LMW-DNICs to the SoxR. We have exploited this NO exchange to investigate the kinetics and mechanisms of release and delivery of NO from various LMW-DNICs to an isopropyl-beta-D-thiogalactopyranoside-dependent SoxR expressed in E. coli cells. These experiments revealed that the NO from RSNO and LMW-DNICs could cross the biological membrane and enter the cytoplasm of the cell to form the SoxR protein-bound DNIC complex. For comparison, we have also studied the direct NO transfer from the LMW-DNICs to the SoxR protein in buffer. The NO transfer was found to be rapid. From the kinetic data derived, we showed that LMW-DNICs with bidentate thiolate ligands displayed greater stability in aqueous solution but exhibited more facile NO delivery to cytoplasmic SoxR in whole cells.
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Olabe JA. The coordination chemistry of nitrosyl in cyanoferrates. An exhibit of bioinorganic relevant reactions. Dalton Trans 2008:3633-48. [DOI: 10.1039/b803153c] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Cheng HY, Chang S. On the [Fe(H2O)5XO]2+ (XC, N, O) complex ions via density functional theory. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.theochem.2005.03.044] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Beck W, Enzmann A, Mayer P. Formation and Structure of Iodotrinitrosyliron, [Fe(NO)3I]. Z Anorg Allg Chem 2005. [DOI: 10.1002/zaac.200400453] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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D'Autréaux B, Horner O, Oddou JL, Jeandey C, Gambarelli S, Berthomieu C, Latour JM, Michaud-Soret I. Spectroscopic description of the two nitrosyl-iron complexes responsible for fur inhibition by nitric oxide. J Am Chem Soc 2004; 126:6005-16. [PMID: 15137765 DOI: 10.1021/ja031671a] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ferric uptake regulation protein (Fur) is a global regulator, ubiquitous in Gram negative bacteria, that acts as a transcriptional repressor when it binds ferrous ion. Fur is involved in responses to several types of stress related to iron metabolism, such as stress induced by nitric oxide (NO) generated by macrophages against bacterial invasion. NO was recently shown to react with Fe(2+) ions in FeFur (iron substituted Fur protein) leading to an Fur bound iron-nitrosyl complex, unable to bind DNA, and characterized by a g = 2.03 EPR signal, associated with an S = (1)/(2) ground state. This electronic configuration could arise from either a mononitrosyl-iron [Fe(NO)](7) or a dinitrosyl-iron [Fe(NO)(2)](9) complex. The use of several spectroscopic tools such as EPR, ENDOR, FTIR, Mössbauer, and UV-visible spectroscopies as well as mass spectrometry analysis was necessary to characterize the iron-nitrosyl species in Fur. Furthermore, changes of C132 and C137 into glycines by site directed mutagenesis reveal that neither of the two cysteines is required for the formation of the g = 2.03 signal. Altogether, we found that two species are responsible for Fur inhibition in NO stress conditions: the major species, S(1/2), is an [Fe(NO)(2)](9) (S = (1)/(2)) complex without bound thiolate and the minor species is probably a diamagnetic [Fe(NO)(2)](8) (S = 0) complex. This is the first characterization of these physiologically relevant species potentially linking iron metabolism and the response to NO toxicity in bacteria.
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Affiliation(s)
- Benoît D'Autréaux
- Laboratoire de Physicochimie des Métaux en Biologie, UMR CNRS-CEA-UJF 5155, CEA-Grenoble, 38054 Grenoble Cedex 9, France
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Chiang CY, Miller ML, Reibenspies JH, Darensbourg MY. Bismercaptoethanediazacyclooctane as a N2S2 Chelating Agent and Cys−X−Cys Mimic for Fe(NO) and Fe(NO)2. J Am Chem Soc 2004; 126:10867-74. [PMID: 15339171 DOI: 10.1021/ja049627y] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The N-protonated bismercaptoethanediazacyclooctane serves as a bidentate dithiolate ligand to oxidized Fe(NO)(2) of Enemark-Feltam notation, E-F [Fe(NO)(2)],(9) mimicking Cys-X-Cys binding of Fe(NO)(2) to proteins or thio-biomolecules. The neutral compound is characterized by the well-known g = 2.03 EPR signal which is a hallmark of dinitrosyl iron complexes, DNIC's. The Fe(NO)(2) unit can be removed from the chelate by excess PhS(-), producing (PhS)(2)Fe(NO)(2)(-). Transfer of NO from Fe(H(+)bme-daco)(NO)(2) (nu(NO) = 1740, 1696 cm(-)(1)) to Fe(II) of [(bme-daco)Fe](2) yields the five-coordinate, square-pyramidal N(2)S(2)Fe(NO) (nu(NO) = 1649 cm(-)(1)), where NO is in the apical position. Its isotropic EPR signal at g = 2.05 is consistent with E-F [Fe(NO)](7) formulation. In excess NO, Roussin's red ester-type molecules are formed as dinuclear or tetranuclear species, [(micro-SRS)[Fe(2)(NO)(4)]](n)() (n =1, 2). These well-characterized molecules furnish reference points for positions and patterns in nu(NO) vibrational spectroscopy expected to be useful for in vivo studies of NO degradation of iron-sulfur clusters in ferredoxins.
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Affiliation(s)
- Chao-Yi Chiang
- Contribution from the Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
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Cheng HY, Chang S, Tsai PY. On the “Brown-Ring” Reaction Product via Density-Functional Theory. J Phys Chem A 2003. [DOI: 10.1021/jp031136x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Hsiu-Yao Cheng
- Department of Chemistry, Tunghai University, Taichung, Taiwan, Republic of China, and Department of Electrical Engineering, National Tsinghua University, Hsinchu, Taiwan, Republic of China
| | - Shyang Chang
- Department of Chemistry, Tunghai University, Taichung, Taiwan, Republic of China, and Department of Electrical Engineering, National Tsinghua University, Hsinchu, Taiwan, Republic of China
| | - Po-Yu Tsai
- Department of Chemistry, Tunghai University, Taichung, Taiwan, Republic of China, and Department of Electrical Engineering, National Tsinghua University, Hsinchu, Taiwan, Republic of China
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Detrembleur C, Teyssié P, Jérôme R. Control of the Radical Polymerization of tert-Butyl Methacrylate in Water by a Novel Combination of Sodium Nitrite and Iron(II) Sulfate. Macromolecules 2002. [DOI: 10.1021/ma011368z] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- C. Detrembleur
- Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman, B6, 4000 Liège, Belgium
| | - Ph. Teyssié
- Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman, B6, 4000 Liège, Belgium
| | - R. Jérôme
- Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman, B6, 4000 Liège, Belgium
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Wanat A, Schneppensieper T, Stochel G, van Eldik R, Bill E, Wieghardt K. Kinetics, mechanism, and spectroscopy of the reversible binding of nitric oxide to aquated iron(II). An undergraduate text book reaction revisited. Inorg Chem 2002; 41:4-10. [PMID: 11782137 DOI: 10.1021/ic010628q] [Citation(s) in RCA: 113] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A detailed kinetic and mechanistic analysis of the classical "brown-ring" reaction of [Fe(H(2)O)(6)](2+) with NO was performed using stopped-flow and laser flash photolysis techniques at ambient and high pressure. The kinetic parameters for the "on" and "off" reactions at 25 degrees C were found to be k(on) = 1.42 x 10(6) M(-1) s(-1), DeltaH(++)(on) = 37.1 +/- 0.5 kJ mol(-1), DeltaS(++)(on) = -3 +/- 2 J K(-1) mol(-1), DeltaV(++)(on) = +6.1 +/- 0.4 cm(3) mol(-1), and k(off) = 3240 +/- 750 s(-1), DeltaH(++)(off) = 48.4 +/- 1.4 kJ mol(-1), DeltaS(++)(off) = -15 +/- 5 J K(-1) mol(-1), DeltaV(++)(off) = +1.3 +/- 0.2 cm(3) mol(-1). These parameters suggest that both reactions follow an interchange dissociative (I(d)) ligand substitution mechanism, which correlates well with the suggested mechanism for the water exchange reaction on [Fe(H(2)O)(6)](2+). In addition, Mössbauer spectroscopy and EPR measurements were performed on the reaction product [Fe(H(2)O)(5)(NO)](2+). The Mössbauer and EPR parameters closely resemble those of the [FeNO](7) units in any of the other well-characterized nitrosyl complexes. It is concluded that its electronic structure is best described by the presence of high-spin Fe(III) antiferromagnetically coupled to NO(-) (S = 1) yielding the observed spin quartet ground state (S = (3)/(2)), i.e., [Fe(III)(H(2)O)(5)(NO(-))](2+), and not [Fe(I)(H(2)O)(5)(NO(+))](2+) as usually quoted in undergraduate text books.
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Affiliation(s)
- Alicja Wanat
- Institute for Inorganic Chemistry, University of Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
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Glidewell C, Johnson IL. Electron paramagnetic resonance study of the reactions of roussin esters Fe2(SR)2(NO)4 with a range of nucleophilic anions. Polyhedron 1988. [DOI: 10.1016/s0277-5387(00)80387-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Butler AR, Glidewell C, Li MH. Nitrosyl Complexes of Iron-Sulfur Clusters. ADVANCES IN INORGANIC CHEMISTRY 1988. [DOI: 10.1016/s0898-8838(08)60235-4] [Citation(s) in RCA: 108] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Butler AR, Glidewell C, Hyde AR, Walton JC. Formation of paramagnetic mononuclear iron nitrosyl complexes from diamagnetic di- and tetranuclear iron-sulphur nitrosyls: characterisation by EPR spectroscopy and study of thiolate and nitrosyl ligand exchange reactions. Polyhedron 1985. [DOI: 10.1016/s0277-5387(00)87029-1] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Reactions of bis-μ-iodo-bis(dinitrosyliron) with halide ions and with thiols: An electron paramagnetic resonance study. Polyhedron 1985. [DOI: 10.1016/s0277-5387(00)84503-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Rehder D, Schmidt J. The relations between nuclear and electron spin resonance parameters of the phosphine complexes ?5-(C5H5)V(CO)3PR3 and Fe(NO)2(PR3)Br. TRANSIT METAL CHEM 1977. [DOI: 10.1007/bf01402677] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Jezowska-Trezebiatowska B, Jezierski A. Electron spin resonance spectroscopy of iron nitrosyl complexes with organic ligands. J Mol Struct 1973. [DOI: 10.1016/0022-2860(73)85142-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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The electronic and three-dimensional structure of the paramagnetic dinitrosyl complexes of ferrous iron. J STRUCT CHEM+ 1971. [DOI: 10.1007/bf00739105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Bennetto H, Jones J, Twigg M. Replacement of dimethyl sulfoxide by imidazole at the axial sites of ferrous phthalocyanine. II. Inorganica Chim Acta 1970. [DOI: 10.1016/s0020-1693(00)93268-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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