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Anandababu K, Ramasubramanian R, Wadepohl H, Comba P, Johnee Britto N, Jaccob M, Mayilmurugan R. A Structural and Functional Model for the Tris-Histidine Motif in Cysteine Dioxygenase. Chemistry 2019; 25:9540-9547. [PMID: 31090109 DOI: 10.1002/chem.201901005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 04/23/2019] [Indexed: 01/14/2023]
Abstract
The iron(II) complexes [Fe(L)(MeCN)3 ](SO3 CF3 )2 (L are two derivatives of tris(2-pyridyl)-based ligands) have been synthesized as models for cysteine dioxygenase (CDO). The molecular structure of one of the complexes exhibits octahedral coordination geometry and the Fe-Npy bond lengths [1.953(4)-1.972(4) Å] are similar to those in the Cys-bound FeII -CDO; Fe-NHis : 1.893-2.199 Å. The iron(II) centers of the model complexes exhibit relatively high FeIII/II redox potentials (E1/2 =0.988-1.380 V vs. ferrocene/ferrocenium electrode, Fc/Fc+ ), within the range for O2 activation and typical for the corresponding nonheme iron enzymes. The reaction of in situ generated [Fe(L)(MeCN)(SPh)]+ with excess O2 in acetonitrile (MeCN) yields selectively the doubly oxygenated phenylsulfinic acid product. Isotopic labeling studies using 18 O2 confirm the incorporation of both oxygen atoms of O2 into the product. Kinetic and preliminary DFT studies reveal the involvement of an FeIII peroxido intermediate with a rhombic S= 1 / 2 FeIII center (687-696 nm; g≈2.46-2.48, 2.13-2.15, 1.92-1.94), similar to the spectroscopic signature of the low-spin Cys-bound FeIII CDO (650 nm, g≈2.47, 2.29, 1.90). The proposed FeIII peroxido intermediates have been trapped, and the O-O stretching frequencies are in the expected range (approximately 920 and 820 cm-1 for the alkyl- and hydroperoxido species, respectively). The model complexes have a structure similar to that of the enzyme and structural aspects as well as the reactivity are discussed.
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Affiliation(s)
- Karunanithi Anandababu
- Bioinorganic Chemistry Laboratory/Physical Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai, 625021, India
| | - Ramamoorthy Ramasubramanian
- Bioinorganic Chemistry Laboratory/Physical Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai, 625021, India
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut and Interdisciplinary Center for Scientific Computing, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Peter Comba
- Anorganisch-Chemisches Institut and Interdisciplinary Center for Scientific Computing, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | | | - Madhavan Jaccob
- Department of Chemistry, Loyola College, Chennai, 600034, India
| | - Ramasamy Mayilmurugan
- Bioinorganic Chemistry Laboratory/Physical Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai, 625021, India
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Chaloner L, Ottenwaelder X. Bio-inspired oxidation chemistry of a Cu(II)-fluoride cryptate with C3-symmetry. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.10.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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3
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Aggregation of mononuclear copper complexes by metal-oxidation-induced ligand deprotonation. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.08.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Alabau RG, Esteruelas MA, Oliván M, Oñate E, Palacios AU, Tsai JY, Xia C. Osmium(II) Complexes Containing a Dianionic CCCC-Donor Tetradentate Ligand. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00776] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Roberto G. Alabau
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea (ISQCH), Centro
de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Miguel A. Esteruelas
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea (ISQCH), Centro
de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Montserrat Oliván
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea (ISQCH), Centro
de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Enrique Oñate
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea (ISQCH), Centro
de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Adrián U. Palacios
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea (ISQCH), Centro
de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Jui-Yi Tsai
- Universal Display Corporation, 375 Phillips Boulevard, Ewing, New Jersey 08618, United States
| | - Chuanjun Xia
- Universal Display Corporation, 375 Phillips Boulevard, Ewing, New Jersey 08618, United States
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Keller S, Brunner F, Prescimone A, Constable EC, Housecroft CE. Hexafluoridophosphate partial hydrolysis leading to the one-dimensional coordination polymer [{Cu(xantphos)(μ-PO2F2)}n]. INORG CHEM COMMUN 2015. [DOI: 10.1016/j.inoche.2015.06.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Bernhardt PV, Bosch S, Comba P, Gahan LR, Hanson GR, Mereacre V, Noble CJ, Powell AK, Schenk G, Wadepohl H. An Approach to More Accurate Model Systems for Purple Acid Phosphatases (PAPs). Inorg Chem 2015. [DOI: 10.1021/acs.inorgchem.5b00628] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Paul V. Bernhardt
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Simone Bosch
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
- Anorganisch-Chemisches Institut and Interdisciplinary
Center for Scientific Computing (IWR), Universität Heidelberg, Im Neuenheimer
Feld 270, D-69120 Heidelberg, Germany
| | - Peter Comba
- Anorganisch-Chemisches Institut and Interdisciplinary
Center for Scientific Computing (IWR), Universität Heidelberg, Im Neuenheimer
Feld 270, D-69120 Heidelberg, Germany
| | - Lawrence R. Gahan
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Graeme R. Hanson
- Centre for Advanced
Imaging, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Valeriu Mereacre
- Institut für Anorganisch Chemie, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, D-76131 Karlsruhe, Germany
| | - Christopher J. Noble
- Centre for Advanced
Imaging, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Annie K. Powell
- Institut für Anorganisch Chemie, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, D-76131 Karlsruhe, Germany
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Gerhard Schenk
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut and Interdisciplinary
Center for Scientific Computing (IWR), Universität Heidelberg, Im Neuenheimer
Feld 270, D-69120 Heidelberg, Germany
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Wiedemann D, Grohmann A. 3d- and 4d-Metal(II) Complexes of a Tris(pyridyl)ethane-Derived N4Ligand - A Structural Study and Reactivity Remarks. Z Anorg Allg Chem 2014. [DOI: 10.1002/zaac.201400047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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8
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Wiedemann D, Grohmann A. Bulk spin-crossover in the complex [FeL(NCS)2] of a tris(pyridyl)ethane-derived N4-ligand—a temperature-dependent crystallographic study. Dalton Trans 2014; 43:2406-17. [DOI: 10.1039/c3dt53070a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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