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Karmakar S, Patra S, Pramanik K, Adhikary A, Dey A, Majumdar A. Reactivity of Thiolate and Hydrosulfide with a Mononuclear {FeNO} 7 Complex Featuring a Very High N-O Stretching Frequency. Inorg Chem 2024; 63:8537-8555. [PMID: 38679874 DOI: 10.1021/acs.inorgchem.3c03274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
Synthesis, characterization, electronic structure, and redox reactions of a mononuclear {FeNO}7 complex with a very high N-O stretching frequency in solution are presented. Nitrosylation of [(LKP)Fe(DMF)]2+ (1) (LKP = tris((1-methyl-4,5-diphenyl-1H-imidazol-2-yl)methyl)amine) produced a five-coordinate {FeNO}7 complex, [(LKP)Fe(NO)]2+ (2). While complex 2 could accommodate an additional water molecule to generate a six-coordinate {FeNO}7 complex, [(LKP)Fe(NO)(H2O)]2+ (3), the coordinated H2O in 3 dissociates to generate 2 in solution. The molecular structure of 2 features a nearly linear Fe-N-O unit with an Fe-N distance of 1.744(4) Å, N-O distance of 1.162(5) Å, and
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Affiliation(s)
- Soumik Karmakar
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Suman Patra
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Koushik Pramanik
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Amit Adhikary
- Department of Chemistry, Technology Campus, University of Calcutta, JD Block, Sector III, Salt Lake, Kolkata 700098, India
| | - Abhishek Dey
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Amit Majumdar
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
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2
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Venero ECS, Giambartolomei L, Sosa E, Fernández do Porto D, López NI, Tribelli PM. Nitrosative stress under microaerobic conditions triggers inositol metabolism in Pseudomonas extremaustralis. PLoS One 2024; 19:e0301252. [PMID: 38696454 PMCID: PMC11065229 DOI: 10.1371/journal.pone.0301252] [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] [Received: 12/23/2023] [Accepted: 03/13/2024] [Indexed: 05/04/2024] Open
Abstract
Bacteria are exposed to reactive oxygen and nitrogen species that provoke oxidative and nitrosative stress which can lead to macromolecule damage. Coping with stress conditions involves the adjustment of cellular responses, which helps to address metabolic challenges. In this study, we performed a global transcriptomic analysis of the response of Pseudomonas extremaustralis to nitrosative stress, induced by S-nitrosoglutathione (GSNO), a nitric oxide donor, under microaerobic conditions. The analysis revealed the upregulation of genes associated with inositol catabolism; a compound widely distributed in nature whose metabolism in bacteria has aroused interest. The RNAseq data also showed heightened expression of genes involved in essential cellular processes like transcription, translation, amino acid transport and biosynthesis, as well as in stress resistance including iron-dependent superoxide dismutase, alkyl hydroperoxide reductase, thioredoxin, and glutathione S-transferase in response to GSNO. Furthermore, GSNO exposure differentially affected the expression of genes encoding nitrosylation target proteins, encompassing metalloproteins and proteins with free cysteine and /or tyrosine residues. Notably, genes associated with iron metabolism, such as pyoverdine synthesis and iron transporter genes, showed activation in the presence of GSNO, likely as response to enhanced protein turnover. Physiological assays demonstrated that P. extremaustralis can utilize inositol proficiently under both aerobic and microaerobic conditions, achieving growth comparable to glucose-supplemented cultures. Moreover, supplementing the culture medium with inositol enhances the stress tolerance of P. extremaustralis against combined oxidative-nitrosative stress. Concordant with the heightened expression of pyoverdine genes under nitrosative stress, elevated pyoverdine production was observed when myo-inositol was added to the culture medium. These findings highlight the influence of nitrosative stress on proteins susceptible to nitrosylation and iron metabolism. Furthermore, the activation of myo-inositol catabolism emerges as a protective mechanism against nitrosative stress, shedding light on this pathway in bacterial systems, and holding significance in the adaptation to unfavorable conditions.
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Affiliation(s)
| | - Lucia Giambartolomei
- Facultad de Ciencias Exactas y Naturales, Departamento de Química Biológica, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Ezequiel Sosa
- Instituto de Cálculo, Facultad de Ciencias Exactas y Naturales, UBA, Buenos Aires, Argentina
| | - Darío Fernández do Porto
- Facultad de Ciencias Exactas y Naturales, Departamento de Química Biológica, Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto de Cálculo, Facultad de Ciencias Exactas y Naturales, UBA, Buenos Aires, Argentina
| | - Nancy I. López
- IQUIBICEN-CONICET, Buenos Aires, Argentina
- Facultad de Ciencias Exactas y Naturales, Departamento de Química Biológica, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Paula M. Tribelli
- IQUIBICEN-CONICET, Buenos Aires, Argentina
- Facultad de Ciencias Exactas y Naturales, Departamento de Química Biológica, Universidad de Buenos Aires, Buenos Aires, Argentina
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3
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Wójciuk KE, Sadło J, Lewandowska H, Brzóska K, Kruszewski M. A Crucial Role of Proteolysis in the Formation of Intracellular Dinitrosyl Iron Complexes. Molecules 2024; 29:1630. [PMID: 38611909 PMCID: PMC11013114 DOI: 10.3390/molecules29071630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 03/22/2024] [Accepted: 03/25/2024] [Indexed: 04/14/2024] Open
Abstract
Dinitrosyl iron complexes (DNICs) stabilize nitric oxide in cells and tissues and constitute an important form of its storage and transportation. DNICs may comprise low-molecular-weight ligands, e.g., thiols, imidazole groups in chemical compounds with low molecular weight (LMWDNICs), or high-molecular-weight ligands, e.g., peptides or proteins (HMWDNICs). The aim of this study was to investigate the role of low- and high-molecular-weight ligands in DNIC formation. Lysosomal and proteasomal proteolysis was inhibited by specific inhibitors. Experiments were conducted on human erythroid K562 cells and on K562 cells overexpressing a heavy chain of ferritin. Cell cultures were treated with •NO donor. DNIC formation was monitored by electron paramagnetic resonance. Pretreatment of cells with proteolysis inhibitors diminished the intensity and changed the shape of the DNIC-specific EPR signal in a treatment time-dependent manner. The level of DNIC formation was significantly influenced by the presence of protein degradation products. Interestingly, formation of HMWDNICs depended on the availability of LMWDNICs. The extent of glutathione involvement in the in vivo formation of DNICs is minor yet noticeable, aligning with our prior research findings.
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Affiliation(s)
- Karolina E. Wójciuk
- Nuclear Facilities Operations Department, National Centre for Nuclear Research (NCBJ), 05-400 Otwock, Poland
- Centre for Radiobiology and Biological Dosimetry, Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland; (H.L.); (K.B.); (M.K.)
| | - Jarosław Sadło
- Centre for Radiation Chemistry and Technology, Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland;
| | - Hanna Lewandowska
- Centre for Radiobiology and Biological Dosimetry, Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland; (H.L.); (K.B.); (M.K.)
- School of Health & Medical Sciences, University of Economics and Human Sciences in Warsaw, 59 Okopowa St., 01-043 Warsaw, Poland
| | - Kamil Brzóska
- Centre for Radiobiology and Biological Dosimetry, Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland; (H.L.); (K.B.); (M.K.)
| | - Marcin Kruszewski
- Centre for Radiobiology and Biological Dosimetry, Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland; (H.L.); (K.B.); (M.K.)
- Department of Molecular Biology and Translational Research, Institute of Rural Health, Jaczewskiego 2, 20-090 Lublin, Poland
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4
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Dodd EL, Le Brun NE. Probing the mechanism of the dedicated NO sensor [4Fe-4S] NsrR: the effect of cluster ligand environment. J Inorg Biochem 2024; 252:112457. [PMID: 38176366 DOI: 10.1016/j.jinorgbio.2023.112457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/11/2023] [Accepted: 12/16/2023] [Indexed: 01/06/2024]
Abstract
NsrR from Streptomyces coelicolor is a bacterial nitric oxide (NO) sensor/nitrosative stress regulator as its primary function, and has been shown to have differential response at low, mid, and high levels of NO. These must correspond to discrete structural changes at the protein-bound [4Fe-4S] cluster in response to stepwise nitrosylation of the cluster. We have investigated the effect of the monohapto carboxylate ligand in the site differentiated [4Fe-4S] cluster cofactor of the protein NsrR on modulating its reactivity to NO with a focus on indentifying mechanistic intermediates. We have prepared a synthetic model [4Fe-4S] cluster complex with tripodal ligand and one single site differentiated site occupied by either thiolate or carboxylate ligand. We report here the mechanistic details of sequential steps of nitrosylation as observed by ESI MS and IR spectroscopy. Parallel non-denaturing mass spectrometry analyses were performed using site-differentiated variants of NsrR with the native aspartic acid, cysteine, or alanine in the position of the forth ligand to the cluster. A mono-nitrosylated synthetic [4Fe-4S] cluster was observed for the first time in a biologically-relevant thiolate-based coordination environment. Combined synthetic and protein data give unprecedented clarity in the modulation of nitrosylation of a [4Fe-4S] cluster.
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Affiliation(s)
- Erin L Dodd
- Centre for Molecular and Structural Biochemistry, School of Chemistry, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK.
| | - Nick E Le Brun
- Centre for Molecular and Structural Biochemistry, School of Chemistry, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
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5
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Monkcom EC, Gómez L, Lutz M, Ye S, Bill E, Costas M, Klein Gebbink RJM. Synthesis, Structure and Reactivity of a Mononuclear N,N,O-Bound Fe(II) α-Keto-Acid Complex. Chemistry 2024; 30:e202302710. [PMID: 37882223 DOI: 10.1002/chem.202302710] [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: 08/18/2023] [Revised: 10/23/2023] [Accepted: 10/25/2023] [Indexed: 10/27/2023]
Abstract
A bulky, tridentate phenolate ligand (ImPh2 NNOtBu ) was used to synthesise the first example of a mononuclear, facial, N,N,O-bound iron(II) benzoylformate complex, [Fe(ImPh2 NNOtBu )(BF)] (2). The X-ray crystal structure of 2 reveals that the iron centre is pentacoordinate (τ=0.5), with a vacant site located cis to the bidentate BF ligand. The Mössbauer parameters of 2 are consistent with high-spin iron(II), and are very close to those reported for α-ketoglutarate-bound non-heme iron enzyme active sites. According to NMR and UV-vis spectroscopies, the structural integrity of 2 is retained in both coordinating and non-coordinating solvents. Cyclic voltammetry studies show that the iron centre has a very low oxidation potential and is more prone to electrochemical oxidation than the redox-active phenolate ligand. Complex 2 reacts with NO to form a S=3 /2 {FeNO}7 adduct in which NO binds directly to the iron centre, according to EPR, UV-vis, IR spectroscopies and DFT analysis. Upon O2 exposure, 2 undergoes oxidative decarboxylation to form a diiron(III) benzoate complex, [Fe2 (ImPh2 NNOtBu )2 (μ2 -OBz)(μ2 -OH)2 ]+ (3). A small amount of hydroxylated ligand was also observed by ESI-MS, hinting at the formation of a high-valent iron(IV)-oxo intermediate. Initial reactivity studies show that 2 is capable of oxygen atom transfer reactivity with O2 , converting methyl(p-tolyl)sulfide to sulfoxide.
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Affiliation(s)
- Emily C Monkcom
- Organic Chemistry and Catalysis, Institute for Sustainable and Circular Chemistry, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands
| | - Laura Gómez
- Serveis Tècnics de Recerca, Universitat de Girona, Pic de Peguera 15, Parc Cientific, 17003, Girona, Spain
| | - Martin Lutz
- Structural Biochemistry, Bijvoet Centre for Biomolecular Research, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands
| | - Shengfa Ye
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Eckhard Bill
- Max-Planck-Institut für Chemische Energiekonversion, 45470, Mülheim an der Ruhr, Germany
| | - Miquel Costas
- Institut de Química Computacional i Catàlisi, Universitat de Girona, Pic de Peguera 15, Parc Cientific, 17003, Girona, Spain
| | - Robertus J M Klein Gebbink
- Organic Chemistry and Catalysis, Institute for Sustainable and Circular Chemistry, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands
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6
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Wu WY, Zheng WY, Chen WT, Tsai FT, Tsai ML, Pao CW, Chen JL, Liaw WF. Electronic Structure and Transformation of Dinitrosyl Iron Complexes (DNICs) Regulated by Redox Non-Innocent Imino-Substituted Phenoxide Ligand. Inorg Chem 2024; 63:2431-2442. [PMID: 38258796 PMCID: PMC10848267 DOI: 10.1021/acs.inorgchem.3c03367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 01/04/2024] [Accepted: 01/10/2024] [Indexed: 01/24/2024]
Abstract
The coupled NO-vibrational peaks [IR νNO 1775 s, 1716 vs, 1668 vs cm-1 (THF)] between two adjacent [Fe(NO)2] groups implicate the electron delocalization nature of the singly O-phenoxide-bridged dinuclear dinitrosyliron complex (DNIC) [Fe(NO)2(μ-ON2Me)Fe(NO)2] (1). Electronic interplay between [Fe(NO)2] units and [ON2Me]- ligand in DNIC 1 rationalizes that "hard" O-phenoxide moiety polarizes iron center(s) of [Fe(NO)2] unit(s) to enforce a "constrained" π-conjugation system acting as an electron reservoir to bestow the spin-frustrated {Fe(NO)2}9-{Fe(NO)2}9-[·ON2Me]2- electron configuration (Stotal = 1/2). This system plays a crucial role in facilitating the ligand-based redox interconversion, working in harmony to control the storage and redox-triggered transport of the [Fe(NO)2]10 unit, while preserving the {Fe(NO)2}9 core in DNICs {Fe(NO)2}9-[·ON2Me]2- [K-18-crown-6-ether)][(ON2Me)Fe(NO)2] (2) and {Fe(NO)2}9-[·ON2Me] [(ON2Me)Fe(NO)2][PF6] (3). Electrochemical studies suggest that the redox interconversion among [{Fe(NO)2}9-[·ON2Me]2-] DNIC 3 ↔ [{Fe(NO)2}9-[ON2Me]-] ↔ [{Fe(NO)2}9-[·ON2Me]] DNIC 2 are kinetically feasible, corroborated by the redox shuttle between O-bridged dimerized [(μ-ONMe)2Fe2(NO)4] (4) and [K-18-crown-6-ether)][(ONMe)Fe(NO)2] (5). In parallel with this finding, the electronic structures of [{Fe(NO)2}9-{Fe(NO)2}9-[·ON2Me]2-] DNIC 1, [{Fe(NO)2}9-[·ON2Me]2-] DNIC 2, [{Fe(NO)2}9-[·ON2Me]] DNIC 3, [{Fe(NO)2}9-[ONMe]-]2 DNIC 4, and [{Fe(NO)2}9-[·ONMe]2-] DNIC 5 are evidenced by EPR, SQUID, and Fe K-edge pre-edge analyses, respectively.
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Affiliation(s)
- Wun-Yan Wu
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Wei-Yuan Zheng
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Wei-Ting Chen
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Fu-Te Tsai
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Ming-Li Tsai
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
| | - Chih-Wen Pao
- National Synchrotron Radiation
Research Center, Hsinchu 30013, Taiwan
| | - Jeng-Lung Chen
- National Synchrotron Radiation
Research Center, Hsinchu 30013, Taiwan
| | - Wen-Feng Liaw
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
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7
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Sanina NA, Utenyshev AN, Dorovatovskii PV, Emel'yanova NS, Ovanesyan NS, Kulikov AV, Sulimenkov IV, Luzhkov VB, Pokidova OV, Aldoshin SM. Synthesis of a tetranitrosyl iron complex with unique structure and properties as an inhibitor of phosphodiesterases. Dalton Trans 2023; 52:18090-18101. [PMID: 37997167 DOI: 10.1039/d3dt03104g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
A novel neutral tetranitrosyl iron complex {[Fe(H2O)4]2+[FeR2(NO)2]22-}·4H2O (1) with R = 5-(3-pyridyl)-4H-1,2,4-triazole-3-thiolyls (C7H5N4S), which is a supramolecular ensemble, has been synthesized and studied. As follows from X-ray diffraction analysis, this is an octahedral Fe2+complex (Lewis acid) with two monoanionic dinitrosyl groups [FeR2(NO)2]- (Lewis base) and 4 water molecules as the ligands. As follows from Mössbauer spectra, the coordinating Fe2+ ion is in a low-spin state S = 0, and the dinitrosyl Fe+ ion is in a low-spin state S = 1/2. According to the data of EPR spectroscopy, mass-spectrometry and amperometry, complex 1 in solution forms dinitrosyl particles of [Fe(C7H6N4S-H)2(NO)2]- composition, which are responsible for NO generation. In addition, complex 1 was shown to be a 5-6 times more efficient phosphodiesterase (PDE) inhibitor at 5 × 10-5 M and 10-4 M concentrations than its thioligand. Probable binding sites of the [FeR2(NO)2]- ligand for the bovine PDE1B model have been determined by molecular docking and quantum-chemical calculations.
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Affiliation(s)
- N A Sanina
- Federal Research Center of Problems of Chemical Physics and Medicine Chemistry, Russian Academy of Sciences, 1 Acad. Semenov Av., Chernogolovka, 142432, Russia.
- M.V. Lomonosov Moscow State University, 119991, Moscow, Russia
- Federal State University of Education, 141014, Mytishchi, Russia
| | - A N Utenyshev
- Federal Research Center of Problems of Chemical Physics and Medicine Chemistry, Russian Academy of Sciences, 1 Acad. Semenov Av., Chernogolovka, 142432, Russia.
| | - P V Dorovatovskii
- National Research Center "Kurchatov Institute", 123182, Moscow, Russia
| | - N S Emel'yanova
- Federal Research Center of Problems of Chemical Physics and Medicine Chemistry, Russian Academy of Sciences, 1 Acad. Semenov Av., Chernogolovka, 142432, Russia.
| | - N S Ovanesyan
- Federal Research Center of Problems of Chemical Physics and Medicine Chemistry, Russian Academy of Sciences, 1 Acad. Semenov Av., Chernogolovka, 142432, Russia.
| | - A V Kulikov
- Federal Research Center of Problems of Chemical Physics and Medicine Chemistry, Russian Academy of Sciences, 1 Acad. Semenov Av., Chernogolovka, 142432, Russia.
| | - I V Sulimenkov
- Chernogolovka Branch of N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Academician Semenov avenue 1/10, Chernogolovka, 142432, Moscow region, Russia
| | - V B Luzhkov
- Federal Research Center of Problems of Chemical Physics and Medicine Chemistry, Russian Academy of Sciences, 1 Acad. Semenov Av., Chernogolovka, 142432, Russia.
| | - O V Pokidova
- Federal Research Center of Problems of Chemical Physics and Medicine Chemistry, Russian Academy of Sciences, 1 Acad. Semenov Av., Chernogolovka, 142432, Russia.
| | - S M Aldoshin
- Federal Research Center of Problems of Chemical Physics and Medicine Chemistry, Russian Academy of Sciences, 1 Acad. Semenov Av., Chernogolovka, 142432, Russia.
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8
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Chang WC, Du WT, Lin YX, Jhang RL, Hsieh CH. Phosphine/thiolate-containing dinitrosyl cobalt complexes (DNCCs): synthesis, characterization, interconversion, X-ray diffraction identification and NO release. Dalton Trans 2023; 52:13724-13731. [PMID: 37706636 DOI: 10.1039/d3dt01681a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/15/2023]
Abstract
Cobalt carbonyl/nitrosyl complexes, (PPh3)(CO)2Co(NO) (1) and (PPh3)2(CO)Co(NO) (2), were obtained by reacting (CO)3Co(NO) with one equiv. and two equiv. of PPh3, respectively. The process of isoelectronic replacement of CO with NO+ resulted in the formation of a cationic complex {Co(NO)2}10 [(PPh3)2Co(NO)2][BF4] (3). Complex (PPh3)(SPh)Co(NO)2 (4), which contains a thiophenolate ligand, was synthesized by ligand exchange of complex 3 with [PPh4][SPh] in a 1 : 1 molar ratio in THF solution. The addition of one equiv. of [PPh4][SPh] to complex 4 led to the formation of complex [PPh4][(SPh)2Co(NO)2] (5). The interconversions among complexes 1-5 were substantiated with the application of IR spectroscopy and X-ray single-crystal diffraction techniques. Notably, complex 4 exhibited commendable NOs (nitric oxide species: NO+/˙NO/NO-) transfer capabilities in the presence of [Fe(TPP)Cl] (5,10,15,20-tetraphenyl-21H,23H-porphine iron(III) chloride).
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Affiliation(s)
- Wen-Chieh Chang
- Department of Chemistry, Tamkang University, Tamsui, New Taipei City 25137, Taiwan.
| | - Wan-Tin Du
- Department of Chemistry, Tamkang University, Tamsui, New Taipei City 25137, Taiwan.
| | - Yi-Xuan Lin
- Department of Chemistry, Tamkang University, Tamsui, New Taipei City 25137, Taiwan.
| | - Ruei-Lin Jhang
- Department of Chemistry, Tamkang University, Tamsui, New Taipei City 25137, Taiwan.
| | - Chung-Hung Hsieh
- Department of Chemistry, Tamkang University, Tamsui, New Taipei City 25137, Taiwan.
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9
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Habib I, Lu TT, Sabbah A, Chen KH, Tsai FT, Liaw WF. One-Pot Photosynthesis of Cubic Fe@Fe 3O 4 Core-Shell Nanoparticle Well-Dispersed in N-Doping Carbonaceous Polymer Using a Molecular Dinitrosyl Iron Precursor. Inorg Chem 2022; 61:20719-20724. [PMID: 36516228 DOI: 10.1021/acs.inorgchem.2c03773] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Nanoscale zerovalent iron (NZVI) features potential application to biomedicine, (electro-/photo)catalysis, and environmental remediation. However, multiple-synthetic steps and limited ZVI content prompt the development of a novel strategy for efficient preparation of NZVI composites. Herein, a dinitrosyl iron complex [(N3MDA)Fe(NO)2] (1-N3MDA) was explored as a molecular precursor for one-pot photosynthesis of a cubic Fe@Fe3O4 core-shell nanoparticle (ZVI% = 60%) well-dispersed in an N-doping carbonaceous polymer (NZVI@NC). Upon photolysis of 1-N3MDA, photosensitizer Eosin Y, and sacrificial reductant TEA, the α-diimine N3MDA and noninnocent NO ligands (1) enable the slow reduction of 1-N3MDA into an unstable [(N3MDA)Fe(NO)2]- species, (2) serve as a capping reagent for controlled nucleation of zerovalent Fe atom into Fe nanoparticle, and (3) promote the polymerization of degraded Eosin Y with N3MDA yielding an N-doping carbonaceous matrix in NZVI@NC. This discovery of a one-pot photosynthetic process for NZVI@NC inspires continued efforts on its application to photolytic water splitting and ferroptotic chemotherapy in the near future.
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Affiliation(s)
| | | | - Amr Sabbah
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
| | - Kuei-Hsien Chen
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
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10
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Kim Y, Sridharan A, Suess DLM. The Elusive Mononitrosylated [Fe 4 S 4 ] Cluster in Three Redox States. Angew Chem Int Ed Engl 2022; 61:e202213032. [PMID: 36194444 PMCID: PMC9669169 DOI: 10.1002/anie.202213032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Indexed: 11/06/2022]
Abstract
Iron-sulfur clusters are well-established targets in biological nitric oxide (NO) chemistry, but the key intermediate in these processes-a mononitrosylated [Fe4 S4 ] cluster-has not been fully characterized in a protein or a synthetic model thereof. Here, we report the synthesis of a three-member redox series of isostructural mononitrosylated [Fe4 S4 ] clusters. Mononitrosylation was achieved by binding NO to a 3 : 1 site-differentiated [Fe4 S4 ]+ cluster; subsequent oxidation and reduction afforded the other members of the series. All three clusters feature a local high-spin Fe3+ center antiferromagnetically coupled to 3 [NO]- . The observation of an anionic NO ligand suggests that NO binding is accompanied by formal electron transfer from the cluster to NO. Preliminary reactivity studies with the monocationic cluster demonstrate that exposure to excess NO degrades the cluster, supporting the intermediacy of mononitrosylated intermediates in NO sensing/signaling.
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Affiliation(s)
- Youngsuk Kim
- Department of ChemistryMassachusetts Institute of Technology77 Massachusetts AveCambridgeMA 02139USA
- Department of ChemistryPusan National UniversityBusan46241Republic of Korea
| | - Arun Sridharan
- Department of ChemistryMassachusetts Institute of Technology77 Massachusetts AveCambridgeMA 02139USA
| | - Daniel L. M. Suess
- Department of ChemistryMassachusetts Institute of Technology77 Massachusetts AveCambridgeMA 02139USA
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11
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Sanina NA, Kozub GI, Kondrat'eva TA, Korchagin DV, Shilov GV, Morgunov RB, Ovanesyan NS, Kulikov AV, Stupina TS, Terent'ev AA, Aldoshin SM. Anionic dinitrosyl iron complexes – new nitric oxide donors with selective toxicity to human glioblastoma cells. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Heinemann J, Böttcher H. Triphenylmethyl Thionitrite: An Efficient NO Transfer Reagent During the Synthesis of a Triruthenium Nitrosyl Cluster. Z Anorg Allg Chem 2022. [DOI: 10.1002/zaac.202100368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jan Heinemann
- Department Chemie Ludwig-Maximilians-Universität Butenandtstrasse 5–13 D) 81377 München Germany
| | - Hans‐Christian Böttcher
- Department Chemie Ludwig-Maximilians-Universität Butenandtstrasse 5–13 D) 81377 München Germany
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13
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Lehnert N, Kim E, Dong HT, Harland JB, Hunt AP, Manickas EC, Oakley KM, Pham J, Reed GC, Alfaro VS. The Biologically Relevant Coordination Chemistry of Iron and Nitric Oxide: Electronic Structure and Reactivity. Chem Rev 2021; 121:14682-14905. [PMID: 34902255 DOI: 10.1021/acs.chemrev.1c00253] [Citation(s) in RCA: 92] [Impact Index Per Article: 30.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Nitric oxide (NO) is an important signaling molecule that is involved in a wide range of physiological and pathological events in biology. Metal coordination chemistry, especially with iron, is at the heart of many biological transformations involving NO. A series of heme proteins, nitric oxide synthases (NOS), soluble guanylate cyclase (sGC), and nitrophorins, are responsible for the biosynthesis, sensing, and transport of NO. Alternatively, NO can be generated from nitrite by heme- and copper-containing nitrite reductases (NIRs). The NO-bearing small molecules such as nitrosothiols and dinitrosyl iron complexes (DNICs) can serve as an alternative vehicle for NO storage and transport. Once NO is formed, the rich reaction chemistry of NO leads to a wide variety of biological activities including reduction of NO by heme or non-heme iron-containing NO reductases and protein post-translational modifications by DNICs. Much of our understanding of the reactivity of metal sites in biology with NO and the mechanisms of these transformations has come from the elucidation of the geometric and electronic structures and chemical reactivity of synthetic model systems, in synergy with biochemical and biophysical studies on the relevant proteins themselves. This review focuses on recent advancements from studies on proteins and model complexes that not only have improved our understanding of the biological roles of NO but also have provided foundations for biomedical research and for bio-inspired catalyst design in energy science.
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Affiliation(s)
- Nicolai Lehnert
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Eunsuk Kim
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Hai T Dong
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Jill B Harland
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Andrew P Hunt
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Elizabeth C Manickas
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Kady M Oakley
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - John Pham
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Garrett C Reed
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Victor Sosa Alfaro
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
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14
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Tung CY, Tseng YT, Lu TT, Liaw WF. Insight into the Electronic Structure of Biomimetic Dinitrosyliron Complexes (DNICs): Toward the Syntheses of Amido-Bridging Dinuclear DNICs. Inorg Chem 2021; 60:15846-15873. [PMID: 34009960 DOI: 10.1021/acs.inorgchem.1c00566] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The ubiquitous function of nitric oxide (NO) guided the biological discovery of the natural dinitrosyliron unit (DNIU) [Fe(NO)2] as an intermediate/end product after Fe nitrosylation of nonheme cofactors. Because of the natural utilization of this cofactor for the biological storage and delivery of NO, a bioinorganic study of synthetic dinitrosyliron complexes (DNICs) has been extensively explored in the last 2 decades. The bioinorganic study of DNICs involved the development of synthetic methodology, spectroscopic discrimination, biological application of NO-delivery reactivity, and translational application to the (catalytic) transformation of small molecules. In this Forum Article, we aim to provide a systematic review of spectroscopic and computational insights into the bonding nature within the DNIU [Fe(NO)2] and the electronic structure of different types of DNICs, which highlights the synchronized advance in synthetic methodology and spectroscopic tools. With regard to the noninnocent nature of a NO ligand, spectroscopic and computational tools were utilized to provide qualitative/quantitative assignment of oxidation states of Fe and NO in DNICs with different redox levels and ligation modes as well as to probe the Fe-NO bonding interaction modulated by supporting ligands. Besides the strong antiferromagnetic coupling between high-spin Fe and paramagnetic NO ligands within the covalent DNIU [Fe(NO)2], in polynuclear DNICs, the effects of the Fe···Fe distance, nature of the bridging ligands, and type of bridging modes on the regulation of the magnetic coupling among paramagnetic DNIU [Fe(NO)2] are further reviewed. In the last part of this Forum Article, the sequential reaction of {Fe(NO)2}10 DNIC [(NO)2Fe(AMP)] (1-red) with NO(g), HBF4, and KC8 establishes a synthetic cycle, {Fe(NO)2}9-{Fe(NO)2}9 DNIC [(NO)2Fe(μ-dAMP)2Fe(NO)2] (1) → {Fe(NO)2}9 DNIC [(NO2)Fe(AMP)][BF4] (1-H) → {Fe(NO)2}10 DNIC 1-red → DNIC 1, for the transformation of NO into HNO/N2O. Of importance, the NO-induced transformation of {Fe(NO)2}10 DNIC 1-red and [(NO)2Fe(DTA)] (2-red; DTA = diethylenetriamine) unravels a synthetic strategy for preparation of the {Fe(NO)2}9-{Fe(NO)2}9 DNICs [(NO)2Fe(μ-NHR)2Fe(NO)2] containing amido-bridging ligands, which hold the potential to feature distinctive physical properties, chemical reactivities, and biological applications.
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Affiliation(s)
- Chi-Yen Tung
- Department of Chemistry, National Tsing Hua University (NTHU), Hsinchu 30013 Taiwan
| | - Yu-Ting Tseng
- Department of Chemistry, National Tsing Hua University (NTHU), Hsinchu 30013 Taiwan
| | - Tsai-Te Lu
- Institute of Biomedical Engineering, National Tsing Hua University (NTHU), Hsinchu 30013, Taiwan
| | - Wen-Feng Liaw
- Department of Chemistry, National Tsing Hua University (NTHU), Hsinchu 30013 Taiwan
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15
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Oakley KM, Zhao Z, Lehane RL, Ma J, Kim E. Generation of H 2S from Thiol-Dependent NO Reactivity of Model [4Fe-4S] Cluster and Roussin's Black Anion. Inorg Chem 2021; 60:15910-15917. [PMID: 34180664 DOI: 10.1021/acs.inorgchem.1c01328] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Iron-sulfur clusters (Fe-S) have been well established as a target for nitric oxide (NO) in biological systems. Complementary to protein-bound studies, synthetic models have provided a platform to study what iron nitrosylated products and byproducts are produced depending on a controlled reaction environment. We have previously shown a model [2Fe-2S] system that produced a dinitrosyl iron complex (DNIC) upon nitrosylation along with hydrogen sulfide (H2S), another important gasotransmitter, in the presence of thiol, and hypothesized a similar reactivity pattern with [4Fe-4S] clusters which have largely produced inconsistent reaction products across biological and synthetic systems. Roussin's black anion (RBA), [Fe4(μ3-S)3(NO)7]-, is a previously established reaction product from synthetic [4Fe-4S] clusters with NO. Here, we present a new reactivity for the nitrosylation of a synthetic [4Fe-4S] cluster in the presence of thiol and thiolate. [Et4N]2[Fe4S4(SPh)4] (1) was nitrosylated in the presence of excess PhSH to generate H2S and an "RBA-like" intermediate that when further reacted with [NEt4][SPh] produced a {Fe(NO)2}9 DNIC, [Et4N][Fe(NO)2(SPh)2] (2). This "RBA-like" intermediate proved difficult to isolate but shares striking similarities to RBA in the presence of thiol based on IR υ(NO) stretching frequencies. Surprisingly, the same reaction products were produced when the reaction started with RBA and thiol. Similar to 1/NO, RBA in the presence of thiol and thiolate generates stoichiometric amounts of DNIC while releasing its bridging sulfides as H2S. These results suggest not only that RBA may not be the final product of [4Fe-4S] + NO but also that RBA has unprecedented reactivity with thiols and thiolates which may explain current challenges around identifying biological nitrosylated Fe-S clusters.
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Affiliation(s)
- Kady M Oakley
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Ziyi Zhao
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Ryan L Lehane
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Ji Ma
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Eunsuk Kim
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
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16
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Sanina NA, Isaeva YA, Utenyshev AN, Dorovatovskii PV, Ovanesyan NS, Emel'yanova NS, Pokidova OV, Tat'yanenko LV, Sulimenkov IV, Kotel'nikov AI, Aldoshin SM. Synthesis, structure, and PDE inhibiting activity of the anionic DNIC with 5-(3-pyridyl)-4H-1,2,4-triazole-3-thiolyl, the nitric oxide donor. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120559] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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17
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Truzzi DR, Medeiros NM, Augusto O, Ford PC. Dinitrosyl Iron Complexes (DNICs). From Spontaneous Assembly to Biological Roles. Inorg Chem 2021; 60:15835-15845. [PMID: 34014639 DOI: 10.1021/acs.inorgchem.1c00823] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Dinitrosyl iron complexes (DNICs) are spontaneously and rapidly generated in cells. Their assembly requires nitric oxide (NO), biothiols, and nonheme iron, either labile iron or iron-sulfur clusters. Despite ubiquitous detection by electron paramagnetic resonance in NO-producing cells, the DNIC's chemical biology remains only partially understood. In this Forum Article, we address the reaction mechanisms for endogenous DNIC formation, with a focus on a labile iron pool as the iron source. The capability of DNICs to promote S-nitrosation is discussed in terms of S-nitrosothiol generation associated with the formation and chemical reactivity of DNICs. We also highlight how elucidation of the chemical reactivity and the dynamics of DNICs combined with the development of detection/quantification methods can provide further information regarding their participation in physiological and pathological processes.
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Affiliation(s)
- Daniela R Truzzi
- Departamento de Bioquímica, Instituto de Química de São Paulo, Universidade de São Paulo, Caixa Postal 26077, CEP05513-970 São Paulo, São Paulo, Brazil
| | - Nathalia M Medeiros
- Departamento de Bioquímica, Instituto de Química de São Paulo, Universidade de São Paulo, Caixa Postal 26077, CEP05513-970 São Paulo, São Paulo, Brazil
| | - Ohara Augusto
- Departamento de Bioquímica, Instituto de Química de São Paulo, Universidade de São Paulo, Caixa Postal 26077, CEP05513-970 São Paulo, São Paulo, Brazil
| | - Peter C Ford
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106-9510, United States
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18
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Pal N, White CJ, Demeshko S, Meyer F, Lehnert N, Majumdar A. A Monohydrosulfidodinitrosyldiiron Complex That Generates N 2O as a Model for Flavodiiron Nitric Oxide Reductases: Reaction Mechanism and Electronic Structure. Inorg Chem 2021; 60:15890-15900. [PMID: 34106714 DOI: 10.1021/acs.inorgchem.1c00429] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Flavodiiron nitric oxide reductases (FNORs) protect microbes from nitrosative stress under anaerobic conditions by mediating the reduction of nitric oxide (NO) to nitrous oxide (N2O). The proposed mechanism for the catalytic reduction of NO by FNORs involves a dinitrosyldiiron intermediate with a [hs-{FeNO}7]2 formulation, which produces N2O and a diferric species. Moreover, both NO and hydrogen sulfide (H2S) have been implicated in several similar physiological functions in biology and are also known to cross paths in cell signaling. Here we report the synthesis, spectroscopic and theoretical characterization, and N2O production activity of an unprecedented monohydrosulfidodinitrosyldiiron compound, with a [(HS)hs-{FeNO}7/hs-{FeNO}7] formulation, that models the key dinitrosyl intermediate of FNORs. The generation of N2O from this unique compound follows a semireduced pathway, where one-electron reduction generates a reactive hs-{FeNO}8 center via the occupation of an Fe-NO antibonding orbital. In contrast to the well-known reactivity of H2S and NO, the coordinated hydrosulfide remains unreactive toward NO and acts only as a spectator ligand during the NO reduction process.
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Affiliation(s)
- Nabhendu Pal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata 700032, West Bengal, India
| | - Corey J White
- Department of Chemistry, The University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Serhiy Demeshko
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstraße 4, Göttingen 37077, Germany
| | - Franc Meyer
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstraße 4, Göttingen 37077, Germany
| | - Nicolai Lehnert
- Department of Chemistry, The University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Amit Majumdar
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata 700032, West Bengal, India
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19
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Pal N, Jana M, Majumdar A. Reduction of NO by diiron complexes in relation to flavodiiron nitric oxide reductases. Chem Commun (Camb) 2021; 57:8682-8698. [PMID: 34373873 DOI: 10.1039/d1cc03149j] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reduction of nitric oxide (NO) to nitrous oxide (N2O) is associated with immense biological and health implications. Flavodiiron nitric oxide reductases (FNORs) are diiron containing enzymes that catalyze the two electron reduction of NO to N2O and help certain pathogenic bacteria to survive under "nitrosative stress" in anaerobic growth conditions. Consequently, invading bacteria can proliferate inside the body of mammals by bypassing the immune defense mechanism involving NO and may thus lead to harmful infections. Various mechanisms, namely the direct reduction, semireduction, superreduction and hyponitrite mechanisms, have been proposed over time for catalytic NO reduction by FNORs. Model studies in relation to the diiron active site of FNORs have immensely helped to replicate the minimal structure-reactivity relationship and to understand the mechanism of NO reduction. A brief overview of the FNOR activity and the proposed reaction mechanisms followed by a systematic description and detailed analysis of the model studies is presented, which describes the development in the area of NO reduction by diiron complexes and its implications. A great deal of successful modeling chemistry as well as the shortcomings related to the synthesis and reactivity studies is discussed in detail. Finally, future prospects in this particular area of research are proposed, which in due course may bring more clarity in the understanding of this important redox reaction.
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Affiliation(s)
- Nabhendu Pal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata 700032, India.
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20
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Poptic AL, Zhang S. Iron(II/III) Halide Complexes Promote the Interconversion of Nitric Oxide and S-Nitrosothiols through Reversible Fe-S Interaction. Inorg Chem 2021; 60:5190-5197. [PMID: 33705121 DOI: 10.1021/acs.inorgchem.1c00203] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Heme and non-heme iron in biology mediate the storage/release of NO• from S-nitrosothiols as a means to control the biological concentration of NO•. Despite their importance in many physiological processes, the mechanisms of N-S bond formation/cleavage at Fe centers have been controversial. Herein, we report the interconversion of NO• and S-nitrosothiols mediated by FeII/FeIII chloride complexes. The reaction of 2 equiv of S-nitrosothiol (Ph3CSNO) with [Cl6FeII2]2- results in facile release of NO• and formation of iron(III) halothiolate. Detailed spectroscopic studies, including in situ UV-vis, IR, and Mössbauer spectroscopy, support the interaction of the S atom with the FeII center. This is in contrast to the proposed mechanism of NO• release from the well-studied "red product" κ1-N bound S-nitrosothiol FeII complex, [(CN)5Fe(κ1-N-RSNO)]3-. Additionally, FeIII chloride can mediate NO• storage through the formation of S-nitrosothiols. Treatment of iron(III) halothiolate with 2 equiv of NO• regenerates Ph3CSNO with the FeII source trapped as the S = 3/2 {FeNO}7 species [Cl3FeNO]-, which is inert toward further coordination and activation of S-nitrosothiols. Our work demonstrates how labile iron can mediate the interconversion of NO•/thiolate and S-nitrosothiol, which has important implications toward how Nature manages the biological concentration of free NO•.
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Affiliation(s)
- Anna L Poptic
- Department of Chemistry & Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Shiyu Zhang
- Department of Chemistry & Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
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21
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Aldoshin SM, Bozhenko KV, Utenyshev AN, Sanina NA, Emel'yanova NS. Formation of supramolecular synthons in the crystalline structure of the dinitrosyl iron complexes with aliphatic thiourea ligands. J Mol Model 2020; 26:330. [PMID: 33150462 DOI: 10.1007/s00894-020-04594-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 10/28/2020] [Indexed: 11/28/2022]
Abstract
By means of quantum-chemical calculations using Density Functional Theory, Quantum Theory of Atoms in Molecules, and Natural Bond Orbitals, theoretical modeling of intermolecular interactions has been performed for eight nitrosyl iron complexes with aliphatic thiourea ligands, which was aimed at discovering the presence of the NO…NO intermolecular interactions and at studying the possibility of the NO…NO supramolecular synthon formation in their crystalline structure for explaining their unusual magnetic properties. Such interactions were shown to be either stacking or T-like interactions, depending on the relative position of nitrosyl ligands and energetically corresponding to Van der Waals bonds. Mainly LP(O), π (NO), and π*(NO) orbitals in various combinations participate in their formation, with π (FeN), π(FeО), and LP(N) orbitals hardly being participants. The involvement of the NO bond orbitals results in quenching the orbital moment of the NO groups. If NO groups are isolated from intermolecular interactions, they can preserve the unquenched orbital moment.
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Affiliation(s)
- S M Aldoshin
- Institute of Problems of Chemical Physics of the Russian Academy of Sciences (IPCP RAS), 142432 Chernogolovka Region, prosp. Acad. Semenova, 1, Moscow, Russian Federation.,Faculty of Fundamental Physicochemical Engineering, Moscow State University, Leninskie Gori, 1, Moscow, Russian Federation, 119991
| | - K V Bozhenko
- Institute of Problems of Chemical Physics of the Russian Academy of Sciences (IPCP RAS), 142432 Chernogolovka Region, prosp. Acad. Semenova, 1, Moscow, Russian Federation.,Faculty of Fundamental Physicochemical Engineering, Moscow State University, Leninskie Gori, 1, Moscow, Russian Federation, 119991
| | - A N Utenyshev
- Institute of Problems of Chemical Physics of the Russian Academy of Sciences (IPCP RAS), 142432 Chernogolovka Region, prosp. Acad. Semenova, 1, Moscow, Russian Federation
| | - N A Sanina
- Institute of Problems of Chemical Physics of the Russian Academy of Sciences (IPCP RAS), 142432 Chernogolovka Region, prosp. Acad. Semenova, 1, Moscow, Russian Federation.,Faculty of Fundamental Physicochemical Engineering, Moscow State University, Leninskie Gori, 1, Moscow, Russian Federation, 119991.,Scientific and Educational Center "Medical Chemistry" of Moscow State Regional University, 141014 Mytishchi Region, st. Vera Voloshina, 24, Moscow, Russian Federation
| | - N S Emel'yanova
- Institute of Problems of Chemical Physics of the Russian Academy of Sciences (IPCP RAS), 142432 Chernogolovka Region, prosp. Acad. Semenova, 1, Moscow, Russian Federation. .,Faculty of Fundamental Physicochemical Engineering, Moscow State University, Leninskie Gori, 1, Moscow, Russian Federation, 119991.
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22
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Saratovskikh EA, Martynenko VM, Psikha BL, Sanina NA. Reaction of adenosine triphosphoric acid and tetranitrosyl iron complex [Fe2(S(CH2)2NH3)2(NO)4]SO4·2.5H2O. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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23
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Zhuge YY, Shen XY, Liu YD, Shapleigh J, Li W. Application of acidic conditions and inert-gas sparging to achieve high-efficiency nitrous oxide recovery during nitrite denitrification. WATER RESEARCH 2020; 182:116001. [PMID: 32544733 DOI: 10.1016/j.watres.2020.116001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 05/21/2020] [Accepted: 05/28/2020] [Indexed: 06/11/2023]
Abstract
Nitrogen removal with energy recovery through denitrification dependent N2O production is garnering recent attention due to its cost advantages. The most effective current method requires alternating COD and nitrite to achieve high N2O production making it incompatible with typical wastewaters and consequently difficult to use in most settings. The work described here introduces a robust and highly efficient N2O recovery approach which has the potential to work with wastewaters containing COD and nitrite simultaneously. This method relies on low pH incubation and inert gas sparging (IGS) to shift a community of mainly N2 producing nitrite denitrifiers to a community that accumulates N2O when incubated in the absence of IGS. Before experiencing IGS, samples from activated sludge incubated at a pH of 4.5 and 6.0 only achieved a maximum N2O production efficiency (PE_N2O) of ∼26%. After IGS the PE_N2O values increased to ∼97.5% and ∼80.2% for samples from these same pH 4.5 and pH 6.0 reactors, respectively. IGS did not lead to N2O production in a pH 7.5 bioreactor. Meta-omics analysis revealed that IGS resulted in an increase in bacteria utilizing the clade I nitrous oxide reductase (nosZI) relative to bacteria utilizing the clade II nitrous oxide reductase (nosZII). This likely results from IGS flushing out N2O leaving nitrite as the principal nitrogen oxide available for respiration, favoring nosZI utilizing bacteria which are more likely to be complete denitrifiers. Metatranscriptomic analysis suggested that the high PE_N2O values that occurred after stopping IGS result from the NO generated by chemodenitrification accumulating to levels that inactivate [4Fe:4S] clusters in the NosR protein essential for N2O reduction in the nosZI denitrifiers. This study provides an efficient and straightforward method for N2O recovery, widening the options for energy recovery from nitrogen-based wastes.
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Affiliation(s)
- Yang-Yang Zhuge
- National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China; State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China
| | - Xun-Yu Shen
- National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China; State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China
| | - Yong-di Liu
- National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China; State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China
| | | | - Wei Li
- National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China; State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China.
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24
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Vanin AF. The Free-Radical Nature of Nitric Oxide Molecules as a Determinant of their Conversion to Nitrosonium Cations in Living Systems. Biophysics (Nagoya-shi) 2020. [DOI: 10.1134/s0006350920030239] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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25
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Amanullah S, Dey A. The role of porphyrin peripheral substituents in determining the reactivities of ferrous nitrosyl species. Chem Sci 2020; 11:5909-5921. [PMID: 32832056 PMCID: PMC7407271 DOI: 10.1039/d0sc01625j] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 05/07/2020] [Indexed: 12/02/2022] Open
Abstract
Ferrous nitrosyl {FeNO}7 species is an intermediate common to the catalytic cycles of Cd1NiR and CcNiR, two heme-based nitrite reductases (NiR), and its reactivity varies dramatically in these enzymes.
Ferrous nitrosyl {FeNO}7 species is an intermediate common to the catalytic cycles of Cd1NiR and CcNiR, two heme-based nitrite reductases (NiR), and its reactivity varies dramatically in these enzymes. The former reduces NO2– to NO in the denitrification pathway while the latter reduces NO2– to NH4+ in a dissimilatory nitrite reduction. With very similar electron transfer partners and heme based active sites, the origin of this difference in reactivity has remained unexplained. Differences in the structure of the heme d1 (Cd1NiR), which bears electron-withdrawing groups and has saturated pyrroles, relative to heme c (CcNiR) are often invoked to explain these reactivities. A series of iron porphyrinoids, designed to model the electron-withdrawing peripheral substitution as well as the saturation present in heme d1 in Cd1NiR, and their NO adducts were synthesized and their properties were investigated. The data clearly show that the presence of electron-withdrawing groups (EWGs) and saturated pyrroles together in a synthetic porphyrinoid (FeDEsC) weakens the Fe–NO bond in {FeNO}7 adducts along with decreasing the bond dissociation free energies (BDFENH) of the {FeHNO}8 species. The EWG raises the E° of the {FeNO}7/8 process, making the electron transfer (ET) facile, but decreases the pKa of {FeNO}8 species, making protonation (PT) difficult, while saturation has the opposite effect. The weakening of the Fe–NO bonding biases the {FeNO}7 species of FeDEsC for NO dissociation, as in Cd1NiR, which is otherwise set-up for a proton-coupled electron transfer (PCET) to form an {FeHNO}8 species eventually leading to its further reduction to NH4+.
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Affiliation(s)
- Sk Amanullah
- School of Chemical Sciences , Indian Association for the Cultivation of Science , 2A & 2B Raja SC Mullick Road , Kolkata , India - 700032 .
| | - Abhishek Dey
- School of Chemical Sciences , Indian Association for the Cultivation of Science , 2A & 2B Raja SC Mullick Road , Kolkata , India - 700032 .
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Jana M, White CJ, Pal N, Demeshko S, Cordes (née Kupper) C, Meyer F, Lehnert N, Majumdar A. Functional Models for the Mono- and Dinitrosyl Intermediates of FNORs: Semireduction versus Superreduction of NO. J Am Chem Soc 2020; 142:6600-6616. [DOI: 10.1021/jacs.9b13795] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Manish Jana
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, West Bengal, India
| | - Corey J. White
- Department of Chemistry, The University of Michigan, 930 N. University Avenue, Ann Arbor 48109, Michigan, United States
| | - Nabhendu Pal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, West Bengal, India
| | - Serhiy Demeshko
- Institut für Anorganische Chemie, Georg-August-Universität, Tammannstraße 4, Göttingen 37077, Germany
| | | | - Franc Meyer
- Institut für Anorganische Chemie, Georg-August-Universität, Tammannstraße 4, Göttingen 37077, Germany
| | - Nicolai Lehnert
- Department of Chemistry, The University of Michigan, 930 N. University Avenue, Ann Arbor 48109, Michigan, United States
| | - Amit Majumdar
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, West Bengal, India
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Structures and Properties of Dinitrosyl Iron and Cobalt Complexes Ligated by Bis(3,5-diisopropyl-1-pyrazolyl)methane. INORGANICS 2019. [DOI: 10.3390/inorganics7100116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Two dinitrosyl iron and cobalt complexes [Fe(NO)2(L1”)](BF4) and [Co(NO)2(L1”)](BF4) are synthesized and characterized, supported by a less hindered bidentate nitrogen ligand bis(3,5-diisopropyl-1-pyrazolyl)methane (denoted as L1”), are surprisingly stable under argon atmosphere. X-ray structural analysis shows a distorted tetrahedral geometry. Spectroscopic and structural parameters of the dinitrosyl iron and cobalt complexes are consistent with the previous reported {Fe(NO)2}9 and {Co(NO)2}10. Two N–O and M–N(O) stretching frequencies and their magnetic properties are also consistent with the above electronic structural assignments. We explored the dioxygen reactivities of the obtained dinitrosyl complexes. Moreover, the related [FeCl2(L1”)], [Co(NO3)2(L1”)], and [Co(NO2)2(L1”)] complexes are also characterized in detail.
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Cho SL, Liao CJ, Lu TT. Synthetic methodology for preparation of dinitrosyl iron complexes. J Biol Inorg Chem 2019; 24:495-515. [DOI: 10.1007/s00775-019-01668-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 05/15/2019] [Indexed: 12/29/2022]
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Sanina N, Kozub G, Zhukova O, Korchagin D, Kondrat'eva T, Morgunov R, Talantsev A, Ovanesyan N, Kulikov A, Aldoshin S. New agent for nitric oxide (NO) chemotherapy: Synthesis and properties of DNIC with hydrazinium cation in solid phase and solutions. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.11.092] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Crack JC, Le Brun NE. Mass Spectrometric Identification of [4Fe–4S](NO)
x
Intermediates of Nitric Oxide Sensing by Regulatory Iron–Sulfur Cluster Proteins. Chemistry 2019; 25:3675-3684. [DOI: 10.1002/chem.201806113] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Jason C. Crack
- Centre for Molecular and Structural BiochemistrySchool of ChemistryUniversity of East Anglia Norwich Research Park Norwich NR4 7TJ UK
| | - Nick E. Le Brun
- Centre for Molecular and Structural BiochemistrySchool of ChemistryUniversity of East Anglia Norwich Research Park Norwich NR4 7TJ UK
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31
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Grabarczyk DB, Ash PA, Myers WK, Dodd EL, Vincent KA. Dioxygen controls the nitrosylation reactions of a protein-bound [4Fe4S] cluster. Dalton Trans 2019; 48:13960-13970. [DOI: 10.1039/c9dt00924h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Iron–sulfur clusters are exceptionally tuneable protein cofactors, and as one of their many roles they are involved in biological responses to nitrosative stress.
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Affiliation(s)
- Daniel B. Grabarczyk
- Department of Chemistry
- University of Oxford
- Inorganic Chemistry Laboratory
- Oxford
- UK
| | - Philip A. Ash
- Department of Chemistry
- University of Oxford
- Inorganic Chemistry Laboratory
- Oxford
- UK
| | - William K. Myers
- Department of Chemistry
- University of Oxford
- Inorganic Chemistry Laboratory
- Oxford
- UK
| | - Erin L. Dodd
- Department of Chemistry
- University of Oxford
- Inorganic Chemistry Laboratory
- Oxford
- UK
| | - Kylie A. Vincent
- Department of Chemistry
- University of Oxford
- Inorganic Chemistry Laboratory
- Oxford
- UK
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Amanullah S, Saha P, Saha R, Dey A. Synthetic Iron Porphyrins for Probing the Differences in the Electronic Structures of Heme a3, Heme d, and Heme d1. Inorg Chem 2018; 58:152-164. [DOI: 10.1021/acs.inorgchem.8b02063] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Sk Amanullah
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Paramita Saha
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Rajat Saha
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Abhishek Dey
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700032, India
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Schiewer CE, Müller CS, Dechert S, Bergner M, Wolny JA, Schünemann V, Meyer F. Effect of Oxidation and Protonation States on [2Fe–2S] Cluster Nitrosylation Giving {Fe(NO)2}9 Dinitrosyl Iron Complexes (DNICs). Inorg Chem 2018; 58:769-784. [DOI: 10.1021/acs.inorgchem.8b02927] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Christine E. Schiewer
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Christina S. Müller
- Fachbereich Physik, Technische Universität Kaiserslautern, D-67663 Kaiserslautern, Germany
| | - Sebastian Dechert
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Marie Bergner
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Juliusz A. Wolny
- Fachbereich Physik, Technische Universität Kaiserslautern, D-67663 Kaiserslautern, Germany
| | - Volker Schünemann
- Fachbereich Physik, Technische Universität Kaiserslautern, D-67663 Kaiserslautern, Germany
| | - Franc Meyer
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
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Lu TT, Wang YM, Hung CH, Chiou SJ, Liaw WF. Bioinorganic Chemistry of the Natural [Fe(NO)2] Motif: Evolution of a Functional Model for NO-Related Biomedical Application and Revolutionary Development of a Translational Model. Inorg Chem 2018; 57:12425-12443. [DOI: 10.1021/acs.inorgchem.8b01818] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
| | - Yun-Ming Wang
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu 30013, Taiwan
| | | | - Show-Jen Chiou
- Department of Applied Chemistry, National Chiayi University, Chiayi 60004, Taiwan
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Ekanger LA, Oyala PH, Moradian A, Sweredoski MJ, Barton JK. Nitric Oxide Modulates Endonuclease III Redox Activity by a 800 mV Negative Shift upon [Fe 4S 4] Cluster Nitrosylation. J Am Chem Soc 2018; 140:11800-11810. [PMID: 30145881 DOI: 10.1021/jacs.8b07362] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Here we characterize the [Fe4S4] cluster nitrosylation of a DNA repair enzyme, endonuclease III (EndoIII), using DNA-modified gold electrochemistry and protein film voltammetry, electrophoretic mobility shift assays, mass spectrometry of whole and trypsin-digested protein, and a variety of spectroscopies. Exposure of EndoIII to nitric oxide under anaerobic conditions transforms the [Fe4S4] cluster into a dinitrosyl iron complex, [(Cys)2Fe(NO)2]-, and Roussin's red ester, [(μ-Cys)2Fe2(NO)4], in a 1:1 ratio with an average retention of 3.05 ± 0.01 Fe per nitrosylated cluster. The formation of the dinitrosyl iron complex is consistent with previous reports, but the Roussin's red ester is an unreported product of EndoIII nitrosylation. Hyperfine sublevel correlation (HYSCORE) pulse EPR spectroscopy detects two distinct classes of NO with 14N hyperfine couplings consistent with the dinitrosyl iron complex and reduced Roussin's red ester. Whole-protein mass spectrometry of EndoIII nitrosylated with 14NO and 15NO support the assignment of a protein-bound [(μ-Cys)2Fe2(NO)4] Roussin's red ester. The [Fe4S4]2+/3+ redox couple of DNA-bound EndoIII is observable using DNA-modified gold electrochemistry, but nitrosylated EndoIII does not display observable redox activity using DNA electrochemistry on gold despite having a similar DNA-binding affinity as the native protein. However, direct electrochemistry of protein films on graphite reveals the reduction potential of native and nitrosylated EndoIII to be 127 ± 6 and -674 ± 8 mV vs NHE, respectively, corresponding to a shift of approximately -800 mV with cluster nitrosylation. Collectively, these data demonstrate that DNA-bound redox activity, and by extension DNA-mediated charge transport, is modulated by [Fe4S4] cluster nitrosylation.
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36
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Li F, Meyer RL, Carpenter SH, VanGelder LE, Nichols AW, Machan CW, Neidig ML, Matson EM. Nitric oxide activation facilitated by cooperative multimetallic electron transfer within an iron-functionalized polyoxovanadate-alkoxide cluster. Chem Sci 2018; 9:6379-6389. [PMID: 30310566 PMCID: PMC6115649 DOI: 10.1039/c8sc00987b] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 06/30/2018] [Indexed: 01/06/2023] Open
Abstract
Cooperative multimetallic electron transfer to accommodate substrate binding.
A series of NO-bound, iron-functionalized polyoxovanadate–alkoxide (FePOV–alkoxide) clusters have been synthesized, providing insight into the role of multimetallic constructs in the coordination and activation of a substrate. Upon exposure of the heterometallic cluster to NO, the vanadium-oxide metalloligand is oxidized by a single electron, shuttling the reducing equivalent to the {FeNO} subunit to form a {FeNO}7 species. Four NO-bound clusters with electronic distributions ranging from [VV3VIV2]{FeNO}7 to [VIV5]{FeNO}7 have been synthesized, and characterized via1H NMR, infrared, and electronic absorption spectroscopies. The ability of the FePOV–alkoxide cluster to store reducing equivalents in the metalloligand for substrate coordination and activation highlights the ultility of the metal-oxide scaffold as a redox reservoir.
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Affiliation(s)
- F Li
- Department of Chemistry , University of Rochester , Rochester , New York 14627 , USA .
| | - R L Meyer
- Department of Chemistry , University of Rochester , Rochester , New York 14627 , USA .
| | - S H Carpenter
- Department of Chemistry , University of Rochester , Rochester , New York 14627 , USA .
| | - L E VanGelder
- Department of Chemistry , University of Rochester , Rochester , New York 14627 , USA .
| | - A W Nichols
- Department of Chemistry , University of Virginia , Charlottesville , Virginia 22904-4319 , USA
| | - C W Machan
- Department of Chemistry , University of Virginia , Charlottesville , Virginia 22904-4319 , USA
| | - M L Neidig
- Department of Chemistry , University of Rochester , Rochester , New York 14627 , USA .
| | - E M Matson
- Department of Chemistry , University of Rochester , Rochester , New York 14627 , USA .
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37
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Crack JC, Hamilton CJ, Le Brun NE. Mass spectrometric detection of iron nitrosyls, sulfide oxidation and mycothiolation during nitrosylation of the NO sensor [4Fe-4S] NsrR. Chem Commun (Camb) 2018; 54:5992-5995. [PMID: 29790499 PMCID: PMC5994877 DOI: 10.1039/c8cc01339j] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Identification of RRE-type iron-nitrosyl species formed upon nitrosylation of [4Fe–4S] NsrR.
The bacterial nitric oxide (NO)-sensing transcriptional regulator NsrR binds a [4Fe–4S] cluster that enables DNA-binding and thus repression of the cell's NO stress response. Upon exposure to NO, the cluster undergoes a complex nitrosylation reaction resulting in a mixture of iron-nitrosyl species, which spectroscopic studies have indicated are similar to well characterized low molecular weight dinitrosyl iron complex (DNIC), Roussin's Red Ester (RRE) and Roussin's Black Salt (RBS). Here we report mass spectrometric studies that enable the unambiguous identification of NsrR-bound RRE-type species, including a persulfide bound form that results from the oxidation of cluster sulfide. In the presence of the low molecular weight thiols glutathione and mycothiol, glutathionylated and mycothiolated forms of NsrR were readily formed.
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Affiliation(s)
- Jason C Crack
- Centre for Molecular and Structural Biochemistry, School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK.
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38
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Reed CJ, Agapie T. Tetranuclear Fe Clusters with a Varied Interstitial Ligand: Effects on the Structure, Redox Properties, and Nitric Oxide Activation. Inorg Chem 2018; 56:13360-13367. [PMID: 29052979 DOI: 10.1021/acs.inorgchem.7b02114] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A new series of tetranuclear Fe clusters displaying an interstitial μ4-F ligand was prepared for a comparison to previously reported μ4-O analogues. With a single nitric oxide (NO) coordinated as a reporter of small-molecule activation, the μ4-F clusters were characterized in five redox states, from FeII3{FeNO}8 to FeIII3{FeNO}7, with NO stretching frequencies ranging from 1680 to 1855 cm-1, respectively. Despite accessing more reduced states with an F- bridge, a two-electron reduction of the distal Fe centers is necessary for the μ4-F clusters to activate NO to the same degree as the μ4-O system; consequently, NO reactivity is observed at more positive potentials with μ4-O than μ4-F. Moreover, the μ4-O ligand better translates redox changes of remote metal centers to diatomic ligand activation. The implication for biological active sites is that the higher-charge bridging ligand is more effective in tuning cluster properties, including the involvement of remote metal centers, for small-molecule activation.
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Affiliation(s)
- Christopher J Reed
- Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Theodor Agapie
- Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
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Banerjee A, Sen S, Paul A. Theoretical Investigations on the Mechanistic Aspects of O2
Activation by a Biomimetic Dinitrosyl Iron Complex. Chemistry 2018; 24:3330-3339. [DOI: 10.1002/chem.201705726] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Ambar Banerjee
- Raman Centre for Atomic Molecular and Optical Sciences; Indian Association for the Cultivation of Science; 2A&2B Raja S.C. Mulick Road, Jadavpur Kolkata 700032 West Bengal India
| | - Souloke Sen
- Raman Centre for Atomic Molecular and Optical Sciences; Indian Association for the Cultivation of Science; 2A&2B Raja S.C. Mulick Road, Jadavpur Kolkata 700032 West Bengal India
- Theoretical Chemistry Department; VU University; Faculty of Sciences; 1081 HV Amsterdam The Netherlands
| | - Ankan Paul
- Raman Centre for Atomic Molecular and Optical Sciences; Indian Association for the Cultivation of Science; 2A&2B Raja S.C. Mulick Road, Jadavpur Kolkata 700032 West Bengal India
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40
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Fe-S Clusters Emerging as Targets of Therapeutic Drugs. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:3647657. [PMID: 29445445 PMCID: PMC5763138 DOI: 10.1155/2017/3647657] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 11/27/2017] [Accepted: 12/06/2017] [Indexed: 01/11/2023]
Abstract
Fe-S centers exhibit strong electronic plasticity, which is of importance for insuring fine redox tuning of protein biological properties. In accordance, Fe-S clusters are also highly sensitive to oxidation and can be very easily altered in vivo by different drugs, either directly or indirectly due to catabolic by-products, such as nitric oxide species (NOS) or reactive oxygen species (ROS). In case of metal ions, Fe-S cluster alteration might be the result of metal liganding to the coordinating sulfur atoms, as suggested for copper. Several drugs presented through this review are either capable of direct interaction with Fe-S clusters or of secondary Fe-S clusters alteration following ROS or NOS production. Reactions leading to Fe-S cluster disruption are also reported. Due to the recent interest and progress in Fe-S biology, it is very likely that an increasing number of drugs already used in clinics will emerge as molecules interfering with Fe-S centers in the near future. Targeting Fe-S centers could also become a promising strategy for drug development.
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Shmatko NY, Korchagin DV, Shilov GV, Ovanesyan NS, Kulikov AV, Sanina NA, Aldoshin SM. The cationic dinitrosyl iron complexes family with thiocarbamide derivatives: Synthesis, structure and properties in the solid state. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.08.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kobayashi K. Sensing Mechanisms in the Redox-Regulated, [2Fe-2S] Cluster-Containing, Bacterial Transcriptional Factor SoxR. Acc Chem Res 2017. [PMID: 28636310 DOI: 10.1021/acs.accounts.7b00137] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Bacteria possess molecular biosensors that enable responses to a variety of stressful conditions, including oxidative stress, toxic compounds, and interactions with other organisms, through elaborately coordinated regulation of gene expression. In Escherichia coli and related bacteria, the transcription factor SoxR functions as a sensor of oxidative stress and nitric oxide (NO). SoxR protein contains a [2Fe-2S] cluster essential for its transcription-enhancing activity, which is regulated by redox changes in the [2Fe-2S] cluster. We have explored the mechanistic and structural basis of SoxR proteins function and determined how the chemistry at the [2Fe-2S] cluster causes the subsequent regulatory response. In this Account, I describe our recent achievements in three different areas using physicochemical techniques, primarily pulse radiolysis. First, redox-dependent conformational changes in SoxR-bound DNA were studied by site-specifically replacing selected bases with the fluorescent probes 2-aminopurine and pyrrolocytosine. X-ray analyses of the DNA-SoxR complex in the oxidized state revealed that the DNA structure is distorted in the center regions, resulting in local untwisting of base pairs. However, the inactive, reduced state had remained uncharacterized. We found that reduction of the [2Fe-2S] cluster in the SoxR-DNA complex weakens the fluorescence intensity within a region confined to the central base pairs in the promoter region. Second, the reactions of NO with [2Fe-2S] clusters of E. coli SoxR were analyzed using pulse radiolysis. The transcriptional activation of SoxR in E. coli occurs through direct modification of [2Fe-2S] by NO to form a dinitrosyl iron complex (DNIC). The reaction of NO with [2Fe-2S] cluster of SoxR proceeded nearly quantitatively with concomitant reductive elimination of two equivalents S0 atoms. Intermediate nitrosylation products, however, were too unstable to observe. We found that the conversion proceeds through at least two steps, with the faster phase being the first reaction of the NO molecule with the [2Fe-2S] cluster. The slower reaction with the second equivalent NO molecule, however, was important for the formation of DNIC. Third, to elucidate the differences between the distinct responses of SoxR proteins from two different species, we studied the interaction of E. coli and Pseudomonas aeruginosa SoxR with superoxide anion using a mutagenic approach. Despite the homology between E. coli SoxR and P. aeruginosa SoxR, the function of P. aeruginosa SoxR differs from that of E. coli. The substitution of E. coli SoxR lysine residues, located close to [2Fe-2S] clusters, into P. aeruginosa SoxR dramatically affected the reaction with superoxide anion.
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Affiliation(s)
- Kazuo Kobayashi
- The Institute of Scientific
and Industrial Research, Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
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Proppe J, Reiher M. Reliable Estimation of Prediction Uncertainty for Physicochemical Property Models. J Chem Theory Comput 2017; 13:3297-3317. [PMID: 28581746 DOI: 10.1021/acs.jctc.7b00235] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
One of the major challenges in computational science is to determine the uncertainty of a virtual measurement, that is the prediction of an observable based on calculations. As highly accurate first-principles calculations are in general unfeasible for most physical systems, one usually resorts to parameteric property models of observables, which require calibration by incorporating reference data. The resulting predictions and their uncertainties are sensitive to systematic errors such as inconsistent reference data, parametric model assumptions, or inadequate computational methods. Here, we discuss the calibration of property models in the light of bootstrapping, a sampling method that can be employed for identifying systematic errors and for reliable estimation of the prediction uncertainty. We apply bootstrapping to assess a linear property model linking the 57Fe Mössbauer isomer shift to the contact electron density at the iron nucleus for a diverse set of 44 molecular iron compounds. The contact electron density is calculated with 12 density functionals across Jacob's ladder (PWLDA, BP86, BLYP, PW91, PBE, M06-L, TPSS, B3LYP, B3PW91, PBE0, M06, TPSSh). We provide systematic-error diagnostics and reliable, locally resolved uncertainties for isomer-shift predictions. Pure and hybrid density functionals yield average prediction uncertainties of 0.06-0.08 mm s-1 and 0.04-0.05 mm s-1, respectively, the latter being close to the average experimental uncertainty of 0.02 mm s-1. Furthermore, we show that both model parameters and prediction uncertainty depend significantly on the composition and number of reference data points. Accordingly, we suggest that rankings of density functionals based on performance measures (e.g., the squared coefficient of correlation, r2, or the root-mean-square error, RMSE) should not be inferred from a single data set. This study presents the first statistically rigorous calibration analysis for theoretical Mössbauer spectroscopy, which is of general applicability for physicochemical property models and not restricted to isomer-shift predictions. We provide the statistically meaningful reference data set MIS39 and a new calibration of the isomer shift based on the PBE0 functional.
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Affiliation(s)
- Jonny Proppe
- Laboratorium für Physikalische Chemie, ETH Zürich , Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Markus Reiher
- Laboratorium für Physikalische Chemie, ETH Zürich , Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
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Serrano PN, Wang H, Crack JC, Prior C, Hutchings MI, Thomson AJ, Kamali S, Yoda Y, Zhao J, Hu MY, Alp EE, Oganesyan VS, Le Brun NE, Cramer SP. Nitrosylation of Nitric-Oxide-Sensing Regulatory Proteins Containing [4Fe-4S] Clusters Gives Rise to Multiple Iron-Nitrosyl Complexes. Angew Chem Int Ed Engl 2016; 55:14575-14579. [PMID: 27778474 PMCID: PMC5204455 DOI: 10.1002/anie.201607033] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 10/05/2016] [Indexed: 12/13/2022]
Abstract
The reaction of protein-bound iron-sulfur (Fe-S) clusters with nitric oxide (NO) plays key roles in NO-mediated toxicity and signaling. Elucidation of the mechanism of the reaction of NO with DNA regulatory proteins that contain Fe-S clusters has been hampered by a lack of information about the nature of the iron-nitrosyl products formed. Herein, we report nuclear resonance vibrational spectroscopy (NRVS) and density functional theory (DFT) calculations that identify NO reaction products in WhiD and NsrR, regulatory proteins that use a [4Fe-4S] cluster to sense NO. This work reveals that nitrosylation yields multiple products structurally related to Roussin's Red Ester (RRE, [Fe2 (NO)4 (Cys)2 ]) and Roussin's Black Salt (RBS, [Fe4 (NO)7 S3 ]. In the latter case, the absence of 32 S/34 S shifts in the Fe-S region of the NRVS spectra suggest that a new species, Roussin's Black Ester (RBE), may be formed, in which one or more of the sulfide ligands is replaced by Cys thiolates.
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Affiliation(s)
| | - Hongxin Wang
- Department of ChemistryUniversity of CaliforniaDavisCA95616USA
- Physical Biosciences DivisionLawrence Berkeley National LaboratoryBerkeleyCA94720USA
| | - Jason C. Crack
- Centre for Molecular and Structural BiochemistrySchool of ChemistryUniversity of East AngliaNorwich Research ParkNorwichNR4 7TJUK
| | - Christopher Prior
- Centre for Molecular and Structural BiochemistrySchool of ChemistryUniversity of East AngliaNorwich Research ParkNorwichNR4 7TJUK
| | | | - Andrew J. Thomson
- Centre for Molecular and Structural BiochemistrySchool of ChemistryUniversity of East AngliaNorwich Research ParkNorwichNR4 7TJUK
| | - Saeed Kamali
- University of Tennessee Space InstituteTullahomeTN37388-9700USA
| | - Yoshitaka Yoda
- Research and Utilization DivisionSPring-8/JASRI1-1-1 Kouto, SayoHyogo679-5198Japan
| | - Jiyong Zhao
- Advanced Photon SourceArgonne National LaboratoryArgonneIL60439USA
| | - Michael Y. Hu
- Advanced Photon SourceArgonne National LaboratoryArgonneIL60439USA
| | - Ercan E. Alp
- Advanced Photon SourceArgonne National LaboratoryArgonneIL60439USA
| | - Vasily S. Oganesyan
- Centre for Molecular and Structural BiochemistrySchool of ChemistryUniversity of East AngliaNorwich Research ParkNorwichNR4 7TJUK
| | - Nick E. Le Brun
- Centre for Molecular and Structural BiochemistrySchool of ChemistryUniversity of East AngliaNorwich Research ParkNorwichNR4 7TJUK
| | - Stephen P. Cramer
- Department of ChemistryUniversity of CaliforniaDavisCA95616USA
- Physical Biosciences DivisionLawrence Berkeley National LaboratoryBerkeleyCA94720USA
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Serrano PN, Wang H, Crack JC, Prior C, Hutchings MI, Thomson AJ, Kamali S, Yoda Y, Zhao J, Hu MY, Alp EE, Oganesyan VS, Le Brun NE, Cramer SP. Nitrosylation of Nitric-Oxide-Sensing Regulatory Proteins Containing [4Fe-4S] Clusters Gives Rise to Multiple Iron-Nitrosyl Complexes. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Hongxin Wang
- Department of Chemistry; University of California; Davis CA 95616 USA
- Physical Biosciences Division; Lawrence Berkeley National Laboratory; Berkeley CA 94720 USA
| | - Jason C. Crack
- Centre for Molecular and Structural Biochemistry; School of Chemistry; University of East Anglia; Norwich Research Park Norwich NR4 7TJ UK
| | - Christopher Prior
- Centre for Molecular and Structural Biochemistry; School of Chemistry; University of East Anglia; Norwich Research Park Norwich NR4 7TJ UK
| | | | - Andrew J. Thomson
- Centre for Molecular and Structural Biochemistry; School of Chemistry; University of East Anglia; Norwich Research Park Norwich NR4 7TJ UK
| | - Saeed Kamali
- University of Tennessee Space Institute; Tullahome TN 37388-9700 USA
| | - Yoshitaka Yoda
- Research and Utilization Division; SPring-8/JASRI; 1-1-1 Kouto, Sayo Hyogo 679-5198 Japan
| | - Jiyong Zhao
- Advanced Photon Source; Argonne National Laboratory; Argonne IL 60439 USA
| | - Michael Y. Hu
- Advanced Photon Source; Argonne National Laboratory; Argonne IL 60439 USA
| | - Ercan E. Alp
- Advanced Photon Source; Argonne National Laboratory; Argonne IL 60439 USA
| | - Vasily S. Oganesyan
- Centre for Molecular and Structural Biochemistry; School of Chemistry; University of East Anglia; Norwich Research Park Norwich NR4 7TJ UK
| | - Nick E. Le Brun
- Centre for Molecular and Structural Biochemistry; School of Chemistry; University of East Anglia; Norwich Research Park Norwich NR4 7TJ UK
| | - Stephen P. Cramer
- Department of Chemistry; University of California; Davis CA 95616 USA
- Physical Biosciences Division; Lawrence Berkeley National Laboratory; Berkeley CA 94720 USA
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Synthesis and structure of new dinitrosyl iron complexes with bridging thiolate ligands [Fe2(μ-SR)2(NO)4]. Russ Chem Bull 2016. [DOI: 10.1007/s11172-015-1205-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Mashruwala AA, Bhatt S, Poudel S, Boyd ES, Boyd JM. The DUF59 Containing Protein SufT Is Involved in the Maturation of Iron-Sulfur (FeS) Proteins during Conditions of High FeS Cofactor Demand in Staphylococcus aureus. PLoS Genet 2016; 12:e1006233. [PMID: 27517714 PMCID: PMC4982691 DOI: 10.1371/journal.pgen.1006233] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 07/10/2016] [Indexed: 01/01/2023] Open
Abstract
Proteins containing DUF59 domains have roles in iron-sulfur (FeS) cluster assembly and are widespread throughout Eukarya, Bacteria, and Archaea. However, the function(s) of this domain is unknown. Staphylococcus aureus SufT is composed solely of a DUF59 domain. We noted that sufT is often co-localized with sufBC, which encode for the Suf FeS cluster biosynthetic machinery. Phylogenetic analyses indicated that sufT was recruited to the suf operon, suggesting a role for SufT in FeS cluster assembly. A S. aureus ΔsufT mutant was defective in the assembly of FeS proteins. The DUF59 protein Rv1466 from Mycobacterium tuberculosis partially corrected the phenotypes of a ΔsufT mutant, consistent with a widespread role for DUF59 in FeS protein maturation. SufT was dispensable for FeS protein maturation during conditions that imposed a low cellular demand for FeS cluster assembly. In contrast, the role of SufT was maximal during conditions imposing a high demand for FeS cluster assembly. SufT was not involved in the repair of FeS clusters damaged by reactive oxygen species or in the physical protection of FeS clusters from oxidants. Nfu is a FeS cluster carrier and nfu displayed synergy with sufT. Furthermore, introduction of nfu upon a multicopy plasmid partially corrected the phenotypes of the ΔsufT mutant. Biofilm formation and exoprotein production are critical for S. aureus pathogenesis and vancomycin is a drug of last-resort to treat staphylococcal infections. Defective FeS protein maturation resulted in increased biofilm formation, decreased production of exoproteins, increased resistance to vancomycin, and the appearance of phenotypes consistent with vancomycin-intermediate resistant S. aureus. We propose that SufT, and by extension the DUF59 domain, is an accessory factor that functions in the maturation of FeS proteins. In S. aureus, the involvement of SufT is maximal during conditions of high demand for FeS proteins.
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Affiliation(s)
- Ameya A. Mashruwala
- Department of Biochemistry and Microbiology, Rutgers University, New Brunswick, New Jersey, United States of America
| | - Shiven Bhatt
- Department of Biochemistry and Microbiology, Rutgers University, New Brunswick, New Jersey, United States of America
| | - Saroj Poudel
- Department of Microbiology and Immunology, Montana State University, Bozeman, Montana, United States of America
| | - Eric S. Boyd
- Department of Microbiology and Immunology, Montana State University, Bozeman, Montana, United States of America
- NASA Astrobiology Institute, Mountain View, California, United States of America
| | - Jeffrey M. Boyd
- Department of Biochemistry and Microbiology, Rutgers University, New Brunswick, New Jersey, United States of America
- * E-mail:
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Sanina NA, Shmatko NY, Korchagin DV, Shilov GV, Terent’ev AA, Stupina TS, Balakina AA, Komleva NV, Ovanesyan NS, Kulikov AV, Aldoshin SM. A new member of the cationic dinitrosyl iron complexes family incorporating N-ethylthiourea is effective against human HeLa and MCF-7 tumor cell lines. J COORD CHEM 2016. [DOI: 10.1080/00958972.2016.1142536] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Nataliya A. Sanina
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia
| | - Natal’ya Yu. Shmatko
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia
| | - Denis V. Korchagin
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia
| | - Gennadii V. Shilov
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia
| | - Alexey A. Terent’ev
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia
| | - Tatyana S. Stupina
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia
| | - Anastasiya A. Balakina
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia
| | - Natal’ya V. Komleva
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia
| | - Nikolay S. Ovanesyan
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia
| | - Alexander V. Kulikov
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia
| | - Sergey M. Aldoshin
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia
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de Ruiter G, Thompson NB, Lionetti D, Agapie T. Nitric oxide activation by distal redox modulation in tetranuclear iron nitrosyl complexes. J Am Chem Soc 2015; 137:14094-106. [PMID: 26390375 DOI: 10.1021/jacs.5b07397] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A series of tetranuclear iron complexes displaying a site-differentiated metal center was synthesized. Three of the metal centers are coordinated to our previously reported ligand, based on a 1,3,5-triarylbenzene motif with nitrogen and oxygen donors. The fourth (apical) iron center is coordinatively unsaturated and appended to the trinuclear core through three bridging pyrazolates and an interstitial μ4-oxide moiety. Electrochemical studies of complex [LFe3(PhPz)3OFe][OTf]2 revealed three reversible redox events assigned to the Fe(II)4/Fe(II)3Fe(III) (-1.733 V), Fe(II)3Fe(III)/Fe(II)2Fe(III)2 (-0.727 V), and Fe(II)2Fe(III)2/Fe(II)Fe(III)3 (0.018 V) redox couples. Combined Mössbauer and crystallographic studies indicate that the change in oxidation state is exclusively localized at the triiron core, without changing the oxidation state of the apical metal center. This phenomenon is assigned to differences in the coordination environment of the two metal sites and provides a strategy for storing electron and hole equivalents without affecting the oxidation state of the coordinatively unsaturated metal. The presence of a ligand-binding site allowed the effect of redox modulation on nitric oxide activation by an Fe(II) metal center to be studied. Treatment of the clusters with nitric oxide resulted in binding of NO to the apical iron center, generating a {FeNO}(7) moiety. As with the NO-free precursors, the three reversible redox events are localized at the iron centers distal from the NO ligand. Altering the redox state of the triiron core resulted in significant change in the NO stretching frequency, by as much as 100 cm(-1). The increased activation of NO is attributed to structural changes within the clusters, in particular, those related to the interaction of the metal centers with the interstitial atom. The differences in NO activation were further shown to lead to differential reactivity, with NO disproportionation and N2O formation performed by the more electron-rich cluster.
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Affiliation(s)
- Graham de Ruiter
- Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Niklas B Thompson
- Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Davide Lionetti
- Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Theodor Agapie
- Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
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Fitzpatrick J, Kim E. Synthetic modeling chemistry of iron-sulfur clusters in nitric oxide signaling. Acc Chem Res 2015. [PMID: 26197209 DOI: 10.1021/acs.accounts.5b00246] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Nitric oxide (NO) is an important signaling molecule that is involved in many physiological and pathological functions. Iron-sulfur proteins are one of the main reaction targets for NO, and the [Fe-S] clusters within these proteins are converted to various iron nitrosyl species upon reaction with NO, of which dinitrosyl iron complexes (DNICs) are the most prevalent. Much progress has been made in identifying the origin of cellular DNIC generation. However, it is not well-understood which other products besides DNICs may form during [Fe-S] cluster degradation nor what effects DNICs and other degradation products can have once they are generated in cells. Even more elusive is an understanding of the manner by which cells cope with unwanted [Fe-S] modifications by NO. This Account describes our synthetic modeling efforts to identify cluster degradation products derived from the [2Fe-2S]/NO reaction in order to establish their chemical reactivity and repair chemistry. Our intent is to use the chemical knowledge that we generate to provide insight into the unknown biological consequences of cluster modification. Our recent advances in three different areas are described. First, new reaction conditions that lead to the formation of previously unrecognized products during the reaction of [Fe-S] clusters with NO are identified. Hydrogen sulfide (H2S), a gaseous signaling molecule, can be generated from the reaction between [2Fe-2S] clusters and NO in the presence of acid or formal H• (e(-)/H(+)) donors. In the presence of acid, a mononitrosyl iron complex (MNIC) can be produced as the major iron-containing product. Second, cysteine analogues can efficiently convert MNICs back to [2Fe-2S] clusters without the need for any other reagents. This reaction is possible for cysteine analogues because of their ability to labilize NO from MNICs and their capacity to undergo C-S bond cleavage, providing the necessary sulfide for [2Fe-2S] cluster formation. Lastly, unique dioxygen reactivity of various types of DNICs has been established. N-bound neutral {Fe(NO)2}(10) DNICs react with O2 to generate low-temperature stable peroxynitrite (ONOO(-)) species, which then carry out nitration chemistry in the presence of phenolic substrates, relevant to tyrosine nitration chemistry. The reaction between S-bound anionic {Fe(NO)2}(9) DNICs and O2 results in the formation of Roussin's red esters (RREs) and thiol oxidation products, chemistry that may be important in biological cysteine oxidation. The N-bound cationic {Fe(NO)2}(9) DNICs can spontaneously release NO, and this property can be utilized in developing a new class of NO-donating agents with anti-inflammatory activity.
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Affiliation(s)
- Jessica Fitzpatrick
- Department
of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Eunsuk Kim
- Department
of Chemistry, Brown University, Providence, Rhode Island 02912, United States
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