201
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Yin DT, Urresti S, Lafond M, Johnston EM, Derikvand F, Ciano L, Berrin JG, Henrissat B, Walton PH, Davies GJ, Brumer H. Structure-function characterization reveals new catalytic diversity in the galactose oxidase and glyoxal oxidase family. Nat Commun 2015; 6:10197. [PMID: 26680532 PMCID: PMC4703870 DOI: 10.1038/ncomms10197] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 11/16/2015] [Indexed: 11/09/2022] Open
Abstract
Alcohol oxidases, including carbohydrate oxidases, have a long history of research that has generated fundamental biological understanding and biotechnological applications. Despite a long history of study, the galactose 6-oxidase/glyoxal oxidase family of mononuclear copper-radical oxidases, Auxiliary Activity Family 5 (AA5), is currently represented by only very few characterized members. Here we report the recombinant production and detailed structure-function analyses of two homologues from the phytopathogenic fungi Colletotrichum graminicola and C. gloeosporioides, CgrAlcOx and CglAlcOx, respectively, to explore the wider biocatalytic potential in AA5. EPR spectroscopy and crystallographic analysis confirm a common active-site structure vis-à-vis the archetypal galactose 6-oxidase from Fusarium graminearum. Strikingly, however, CgrAlcOx and CglAlcOx are essentially incapable of oxidizing galactose and galactosides, but instead efficiently catalyse the oxidation of diverse aliphatic alcohols. The results highlight the significant potential of prospecting the evolutionary diversity of AA5 to reveal novel enzyme specificities, thereby informing both biology and applications.
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Affiliation(s)
- DeLu Tyler Yin
- Michael Smith Laboratories and Department of Chemistry, University of British Columbia, 2185 East Mall, Vancouver, British Columbia, Canada V6T 1Z4
| | - Saioa Urresti
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
| | - Mickael Lafond
- Michael Smith Laboratories and Department of Chemistry, University of British Columbia, 2185 East Mall, Vancouver, British Columbia, Canada V6T 1Z4.,Institut des Sciences Moléculaires de Marseille-Team BiosCiences UMR 7313-CNRS, Aix-Marseille University, Avenue Escadrille Normandie Niemen, Marseille 13397, France
| | - Esther M Johnston
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
| | - Fatemeh Derikvand
- Michael Smith Laboratories and Department of Chemistry, University of British Columbia, 2185 East Mall, Vancouver, British Columbia, Canada V6T 1Z4
| | - Luisa Ciano
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
| | - Jean-Guy Berrin
- INRA, UMR1163 Biodiversité et Biotechnologie Fongiques Marseille F-13288, France
| | - Bernard Henrissat
- Architecture et Fonction des Macromolécules Biologiques, CNRS-Aix-Marseille University, 163 Avenue de Luminy, Marseille 13288, France.,INRA, USC 1408 AFMB, Marseille 13288, France.,Department of Biological Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Paul H Walton
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
| | - Gideon J Davies
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
| | - Harry Brumer
- Michael Smith Laboratories and Department of Chemistry, University of British Columbia, 2185 East Mall, Vancouver, British Columbia, Canada V6T 1Z4
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202
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Chiang L, Clarke RM, Herasymchuk K, Sutherland M, Prosser KE, Shimazaki Y, Storr T. Electronic Structure Evaluation of an Oxidized Tris(methoxy)-Substituted Ni Salen Complex. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201501144] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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203
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Ghosh M, Nikhil YLK, Dhar BB, Sen Gupta S. Mechanism of Alcohol Oxidation by Fe(V)(O) at Room Temperature. Inorg Chem 2015; 54:11792-8. [PMID: 26645088 DOI: 10.1021/acs.inorgchem.5b01937] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Selective oxidation of alcohol to its corresponding carbonyl compound is an important chemical process in biological as well as industrial reactions. The heme containing enzyme CytP450 has been known to selectively oxidize alcohols to their corresponding carbonyl compounds. The mechanism of this reaction, which involves high-valent Fe(IV)(O)-porphyrin(•+) intermediate with alcohol, has been well-studied extensively both with the native enzyme and with model complexes. In this paper, we report for the first time the mechanistic insight of alcohol oxidation with Fe(V)(O) complex of biuret TAML (bTAML), which is isoelectronic with Fe(IV)(O)-porphyrin(•+) intermediate form in CytP450. The oxidations displayed saturation kinetics, which allowed us to determine both the binding constants and first-order rate constants for the reaction. The K and k values observed for the oxidation of benzyl alcohol by Fe(V)(O) at room temperature (K = 300 M(-1), k = 0.35 s(-1)) is very similar to that obtained by CytP450 compound I at -50 °C (K = 214 M(-1), k = 0.48 s(-1)). Thermodynamic parameters determined from van't Hoff's plot (ΔH∼ -4 kcal/mol) suggest hydrogen bonding interaction between substrate and bTAML ligand framework of the Fe(V)(O) complex. Analysis of H/D KIE (kH/kD ∼ 19 at 303 K), Hammett correlation and linearity in Bell-Evans-Polyanski plot points to the C-H abstraction as the rate determination step. Finally, experiments using Fe(V)(O(18)) for benzyl alcohol oxidation and use of the "radical clock" cyclobutanol as a substrate shows the absence of a rebound mechanism as is observed for CytP450. Instead, an ET/PT process is proposed after C-H abstraction leading to formation of the aldehyde, similar to what has been proposed for the heme and nonheme model compounds.
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Affiliation(s)
- Munmun Ghosh
- Chemical Engineering Division, CSIR-National Chemical Laboratory , Pune 411008, India
| | - Y L K Nikhil
- Chemical Engineering Division, CSIR-National Chemical Laboratory , Pune 411008, India
| | - Basab B Dhar
- Department of Chemistry, Shiv Nadar University , Goutam Buddha Nagar, UP 201314, India
| | - Sayam Sen Gupta
- Chemical Engineering Division, CSIR-National Chemical Laboratory , Pune 411008, India
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204
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Benisvy L, Zats GM, Fleker O, Yufit DS, Orio M, Romanenko G, Ovcharenko V. X-ray structure of a Ni(II)-tri-phenoxyl radical complex. Dalton Trans 2015; 44:17924-6. [PMID: 26427015 DOI: 10.1039/c5dt03131a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The diimino-diphenolato neutral square-planar Ni(ii) complex, NiL2, is readily oxidised with 2 equiv. of Ag[SbF6], to produce an unprecedented octahedral Ni(ii) tris(phenoxyl) radical complex, [Ni(L˙)3][SbF6]2. This study reveals, for the first time, the X-ray structure of a metal-tri-phenoxyl radical complex.
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Affiliation(s)
- Laurent Benisvy
- Department of Chemistry, Bar-Ilan University, Ramat Gan 52900, Israel.
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205
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Toftgaard Pedersen A, Birmingham WR, Rehn G, Charnock SJ, Turner NJ, Woodley JM. Process Requirements of Galactose Oxidase Catalyzed Oxidation of Alcohols. Org Process Res Dev 2015. [DOI: 10.1021/acs.oprd.5b00278] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Asbjørn Toftgaard Pedersen
- Department
of Chemical and Biochemical Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - William R. Birmingham
- School
of Chemistry, University of Manchester, Manchester Institute of Biotechnology, 131 Princess Street, Manchester, M1 7DN, United Kingdom
| | - Gustav Rehn
- Department
of Chemical and Biochemical Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Simon J. Charnock
- Prozomix
Ltd, Station Court, Haltwhistle, Northumberland NE49 9HN, United Kingdom
| | - Nicholas J. Turner
- School
of Chemistry, University of Manchester, Manchester Institute of Biotechnology, 131 Princess Street, Manchester, M1 7DN, United Kingdom
| | - John M. Woodley
- Department
of Chemical and Biochemical Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
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206
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Parween A, Mandal TK, Guillot R, Naskar S. Acid–base behavior, electrochemical properties and DFT study of redox non-innocent phenol–imidazole ligands and their Cu complexes. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.06.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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207
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Parikka K, Master E, Tenkanen M. Oxidation with galactose oxidase: Multifunctional enzymatic catalysis. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcatb.2015.06.006] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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208
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Ghafar A, Parikka K, Sontag-Strohm T, Österberg M, Tenkanen M, Mikkonen KS. Strengthening effect of nanofibrillated cellulose is dependent on enzymatically oxidized polysaccharide gel matrices. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.07.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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209
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de Bellefeuille D, Orio M, Barra AL, Aukauloo A, Journaux Y, Philouze C, Ottenwaelder X, Thomas F. Redox Noninnocence of the Bridge in Copper(II) Salophen and Bis(oxamato) Complexes. Inorg Chem 2015; 54:9013-26. [DOI: 10.1021/acs.inorgchem.5b01285] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- David de Bellefeuille
- Department
of Chemistry and Biochemistry, Concordia University, Montreal, Quebec H4B 1R6, Canada
| | - Maylis Orio
- Laboratoire
de Spectrochimie Infrarouge et Raman, Université des Sciences et Technologies de Lille, UMR CNRS 8516, 59655 Villeneuve
d’Ascq Cedex, France
| | - Anne-Laure Barra
- Laboratoire National des Champs Magnétiques Intenses, CNRS, 25 rue des Martyrs, 38042 Grenoble, France
| | - Ally Aukauloo
- Institut
de Chimie Moléculaire et des Matériaux d’Orsay,
UMR CNRS 8182, Université Paris-Sud XI, 91405 Orsay, France
- Service de Bioénergétique,
Biologie Structurale et Mécanismes (SB2SM), CEA, iBiTec-S;
Biochimie Biophysique et Biologie Structurale (B3S),
I2BC, UMR 9198, 91191 Gif-sur-Yvette, France
| | - Yves Journaux
- Institut
de Chimie Moléculaire et des Matériaux d’Orsay,
UMR CNRS 8182, Université Paris-Sud XI, 91405 Orsay, France
- Sorbonne Universités,
UPMC Université Paris 06, UMR CNRS 8232, Institut
Parisien de Chimie Moléculaire, France
| | - Christian Philouze
- Equipe
CIRE, Département de Chimie Moléculaire, UMR CNRS 5250, Université Grenoble-Alpes, 38041 Grenoble Cedex 9, France
| | - Xavier Ottenwaelder
- Department
of Chemistry and Biochemistry, Concordia University, Montreal, Quebec H4B 1R6, Canada
| | - Fabrice Thomas
- Equipe
CIRE, Département de Chimie Moléculaire, UMR CNRS 5250, Université Grenoble-Alpes, 38041 Grenoble Cedex 9, France
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210
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Paria S, Ohta T, Morimoto Y, Ogura T, Sugimoto H, Fujieda N, Goto K, Asano K, Suzuki T, Itoh S. Generation, Characterization, and Reactivity of a Cu(II)-Alkylperoxide/Anilino Radical Complex: Insight into the O-O Bond Cleavage Mechanism. J Am Chem Soc 2015; 137:10870-3. [PMID: 26291639 DOI: 10.1021/jacs.5b04104] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The reaction of [Cu(I)(TIPT3tren) (CH3CN)]ClO4 (1) and cumene hydroperoxide (C6H5C(CH3)2OOH, ROOH) at -60 °C in CH2Cl2 gave a Cu(II)-alkylperoxide/anilino radical complex 2, the formation of which was confirmed by UV-vis, resonance Raman, EPR, and CSI-mass spectroscopy. The mechanism of formation of 2, as well as its reactivity, has been explored.
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Affiliation(s)
- Sayantan Paria
- Department of Material and Life Science, Division of Advanced Science and Biotechnology, Graduate School of Engineering, Osaka University , 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Takehiro Ohta
- Picobiology Institute, Graduate School of Life Science, University of Hyogo , RSC-UH LP Center, Koto 1-1-1, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Yuma Morimoto
- Department of Material and Life Science, Division of Advanced Science and Biotechnology, Graduate School of Engineering, Osaka University , 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Takashi Ogura
- Picobiology Institute, Graduate School of Life Science, University of Hyogo , RSC-UH LP Center, Koto 1-1-1, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Hideki Sugimoto
- Department of Material and Life Science, Division of Advanced Science and Biotechnology, Graduate School of Engineering, Osaka University , 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Nobutaka Fujieda
- Department of Material and Life Science, Division of Advanced Science and Biotechnology, Graduate School of Engineering, Osaka University , 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Kei Goto
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology , 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Kaori Asano
- Comprehensive Analysis Center, The Institute of Scientific and Industrial Research (ISIR), Osaka University , 8-1 Mihogaoka, Ibaraki, Osaka 567-0057, Japan
| | - Takeyuki Suzuki
- Comprehensive Analysis Center, The Institute of Scientific and Industrial Research (ISIR), Osaka University , 8-1 Mihogaoka, Ibaraki, Osaka 567-0057, Japan
| | - Shinobu Itoh
- Department of Material and Life Science, Division of Advanced Science and Biotechnology, Graduate School of Engineering, Osaka University , 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
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211
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Shibata N, Toraya T. Molecular architectures and functions of radical enzymes and their (re)activating proteins. J Biochem 2015; 158:271-92. [PMID: 26261050 DOI: 10.1093/jb/mvv078] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 07/22/2015] [Indexed: 02/07/2023] Open
Abstract
Certain proteins utilize the high reactivity of radicals for catalysing chemically challenging reactions. These proteins contain or form a radical and therefore named 'radical enzymes'. Radicals are introduced by enzymes themselves or by (re)activating proteins called (re)activases. The X-ray structures of radical enzymes and their (re)activases revealed some structural features of these molecular apparatuses which solved common enigmas of radical enzymes—i.e. how the enzymes form or introduce radicals at the active sites, how they use the high reactivity of radicals for catalysis, how they suppress undesired side reactions of highly reactive radicals and how they are (re)activated when inactivated by extinction of radicals. This review highlights molecular architectures of radical B12 enzymes, radical SAM enzymes, tyrosyl radical enzymes, glycyl radical enzymes and their (re)activating proteins that support their functions. For generalization, comparisons of the recently reported structures of radical enzymes with those of canonical radical enzymes are summarized here.
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Affiliation(s)
- Naoki Shibata
- Department of Life Science, Graduate School of Life Science, University of Hyogo, 3-2-1 Koto, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan and
| | - Tetsuo Toraya
- Department of Bioscience and Biotechnology, Graduate School of Natural Science and Technology, Okayama University, Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
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212
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Jurss JW, Khnayzer RS, Panetier JA, El Roz KA, Nichols EM, Head-Gordon M, Long JR, Castellano FN, Chang CJ. Bioinspired design of redox-active ligands for multielectron catalysis: effects of positioning pyrazine reservoirs on cobalt for electro- and photocatalytic generation of hydrogen from water. Chem Sci 2015; 6:4954-4972. [PMID: 29142725 PMCID: PMC5664355 DOI: 10.1039/c5sc01414j] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Accepted: 06/09/2015] [Indexed: 01/18/2023] Open
Abstract
Mononuclear metalloenzymes in nature can function in cooperation with precisely positioned redox-active organic cofactors in order to carry out multielectron catalysis. Inspired by the finely tuned redox management of these bioinorganic systems, we present the design, synthesis, and experimental and theoretical characterization of a homologous series of cobalt complexes bearing redox-active pyrazines. These donor moieties are locked into key positions within a pentadentate ligand scaffold in order to evaluate the effects of positioning redox non-innocent ligands on hydrogen evolution catalysis. Both metal- and ligand-centered redox features are observed in organic as well as aqueous solutions over a range of pH values, and comparison with analogs bearing redox-inactive zinc(ii) allows for assignments of ligand-based redox events. Varying the geometric placement of redox non-innocent pyrazine donors on isostructural pentadentate ligand platforms results in marked effects on observed cobalt-catalyzed proton reduction activity. Electrocatalytic hydrogen evolution from weak acids in acetonitrile solution, under diffusion-limited conditions, reveals that the pyrazine donor of axial isomer 1-Co behaves as an unproductive electron sink, resulting in high overpotentials for proton reduction, whereas the equatorial pyrazine isomer complex 2-Co is significantly more active for hydrogen generation at lower voltages. Addition of a second equatorial pyrazine in complex 3-Co further minimizes overpotentials required for catalysis. The equatorial derivative 2-Co is also superior to its axial 1-Co congener for electrocatalytic and visible-light photocatalytic hydrogen generation in biologically relevant, neutral pH aqueous media. Density functional theory calculations (B3LYP-D2) indicate that the first reduction of catalyst isomers 1-Co, 2-Co, and 3-Co is largely metal-centered while the second reduction occurs at pyrazine. Taken together, the data establish that proper positioning of non-innocent pyrazine ligands on a single cobalt center is indeed critical for promoting efficient hydrogen catalysis in aqueous media, akin to optimally positioned redox-active cofactors in metalloenzymes. In a broader sense, these findings highlight the significance of electronic structure considerations in the design of effective electron-hole reservoirs for multielectron transformations.
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Affiliation(s)
- Jonah W Jurss
- Department of Chemistry , University of California , Berkeley , California 94720 , USA . ; ;
- Department of Chemistry and Biochemistry , University of Mississippi , University , MS 38677 , USA
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Rony S Khnayzer
- Department of Chemistry , North Carolina State University , Raleigh , NC 27695-8204 , USA .
- Department of Natural Sciences , Lebanese American University , Beirut 1102-2801 , Chouran , Lebanon
| | - Julien A Panetier
- Department of Chemistry , University of California , Berkeley , California 94720 , USA . ; ;
- Materials Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Karim A El Roz
- Department of Chemistry , North Carolina State University , Raleigh , NC 27695-8204 , USA .
| | - Eva M Nichols
- Department of Chemistry , University of California , Berkeley , California 94720 , USA . ; ;
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Martin Head-Gordon
- Department of Chemistry , University of California , Berkeley , California 94720 , USA . ; ;
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Jeffrey R Long
- Department of Chemistry , University of California , Berkeley , California 94720 , USA . ; ;
- Materials Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Felix N Castellano
- Department of Chemistry , North Carolina State University , Raleigh , NC 27695-8204 , USA .
| | - Christopher J Chang
- Department of Chemistry , University of California , Berkeley , California 94720 , USA . ; ;
- Department of Molecular and Cell Biology , University of California , Berkeley , California 94720 , USA
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
- Howard Hughes Medical Institute , University of California , Berkeley , California 94720 , USA
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213
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Le Poul N, Le Mest Y, Jabin I, Reinaud O. Supramolecular modeling of mono-copper enzyme active sites with calix[6]arene-based funnel complexes. Acc Chem Res 2015; 48:2097-106. [PMID: 26103534 DOI: 10.1021/acs.accounts.5b00152] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Supramolecular bioinorganic chemistry is a natural evolution in biomimetic metallic systems since it constitutes a further degree of complexity in modeling. The traditional approach consisting of mimicking the first coordination sphere of metal sites proved to be very efficient, because valuable data are extracted from these examples to gain insight in natural systems mechanisms. But it does not reproduce several specific aspects of enzymes that can be mimicked by the implementation of a cavity embedding the labile active site and thus controlling the properties of the metal ion by noncovalent interactions. This Account reports on a strategy aimed at reproducing some supramolecular aspects encountered in the natural systems. The cavity complexes described herein display a coordination site constructed on a macrocycle. Thanks to a careful design of the cavity-based ligands, complexes orienting their labile site specifically toward the inside of the macrocycle were obtained. The supramolecular systems are based on the flexible calix[6]arene core that surrounds the metal ion labile site, thereby constraining exogenous molecules to pass through the conic funnel to reach the metal center. Such an architecture confers to the metal ion very unusual properties and behaviors, which in many aspects are biologically relevant. Three generations of calix[6]-based ligands are presented and discussed in the context of modeling the monocopper sites encountered in some enzymes. A wide range of phenomena are highlighted such as the impact that the size and shape of the access channel to the metal center have on the selectivity and rate of the binding process, the possible remote control of the electronics through small modifications operated on the cavity edges, induced-fit behavior associated with host-guest association (shoe-tree effect) that affects the redox properties of the metal ion and the electron exchange pathway, consequences of forbidden associative ligand exchange allowing a redox switch to drive an "antithermodynamic" ligand exchange, drastic effects of the full control of the second coordination sphere, and dioxygen activation in a confined chamber conducted to a selective and unusual four-electron redox process. All these findings bring new clues for better understanding the control exerted by the proteic environment on a metal center, allow the identification of new reaction pathways, and lead to new proposals for enzymatic catalytic cycle (such as the formation of an alkylhydroperoxide intermediate for mononuclear Cu-hydroxylases). The supramolecular systems may also be exploited for designing highly selective and sensitive probes for molecules of particular function and shape or to design new selective catalysts.
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Affiliation(s)
- Nicolas Le Poul
- Laboratoire de Chimie,
Electrochimie Moléculaires et Chimie Analytique, CNRS UMR 6521, Université de Bretagne Occidentale, 6 Avenue Le Gorgeu, 29238 Brest, France
| | - Yves Le Mest
- Laboratoire de Chimie,
Electrochimie Moléculaires et Chimie Analytique, CNRS UMR 6521, Université de Bretagne Occidentale, 6 Avenue Le Gorgeu, 29238 Brest, France
| | - Ivan Jabin
- Laboratoire de Chimie Organique, Université Libre de Bruxelles (ULB), Avenue F. Roosevelt 50, CP160/06, B-1050 Brussels, Belgium
| | - Olivia Reinaud
- Laboratoire de Chimie et de Biochimie Pharmacologiques
et Toxicologiques, Sorbonne Paris Cité, Université Paris Descartes, CNRS UMR 8601, 45 Rue des Saints Pères, 75006 Paris, France
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214
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Das B, Al-Hunaiti A, Haukka M, Demeshko S, Meyer S, Shteinman AA, Meyer F, Repo T, Nordlander E. Catalytic Oxidation of Alkanes and Alkenes by H2O2with a μ-Oxido Diiron(III) Complex as Catalyst/Catalyst Precursor. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500576] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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215
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Pickl M, Fuchs M, Glueck SM, Faber K. The substrate tolerance of alcohol oxidases. Appl Microbiol Biotechnol 2015; 99:6617-42. [PMID: 26153139 PMCID: PMC4513209 DOI: 10.1007/s00253-015-6699-6] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 05/10/2015] [Accepted: 05/15/2015] [Indexed: 11/29/2022]
Abstract
Alcohols are a rich source of compounds from renewable sources, but they have to be activated in order to allow the modification of their carbon backbone. The latter can be achieved via oxidation to the corresponding aldehydes or ketones. As an alternative to (thermodynamically disfavoured) nicotinamide-dependent alcohol dehydrogenases, alcohol oxidases make use of molecular oxygen but their application is under-represented in synthetic biotransformations. In this review, the mechanism of copper-containing and flavoprotein alcohol oxidases is discussed in view of their ability to accept electronically activated or non-activated alcohols and their propensity towards over-oxidation of aldehydes yielding carboxylic acids. In order to facilitate the selection of the optimal enzyme for a given biocatalytic application, the substrate tolerance of alcohol oxidases is compiled and discussed: Substrates are classified into groups (non-activated prim- and sec-alcohols; activated allylic, cinnamic and benzylic alcohols; hydroxy acids; sugar alcohols; nucleotide alcohols; sterols) together with suitable alcohol oxidases, their microbial source, relative activities and (stereo)selectivities.
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Affiliation(s)
- Mathias Pickl
- Department of Chemistry, Organic & Bioorganic Chemistry, University of Graz, Heinrichstrasse 28, A-8010, Graz, Austria
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216
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Properties of the indole ring in metal complexes. A comparison with the phenol ring. J Inorg Biochem 2015; 148:105-15. [DOI: 10.1016/j.jinorgbio.2015.03.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 03/01/2015] [Accepted: 03/02/2015] [Indexed: 11/20/2022]
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217
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Chiang L, Herasymchuk K, Thomas F, Storr T. Influence of Electron-Withdrawing Substituents on the Electronic Structure of Oxidized Ni and Cu Salen Complexes. Inorg Chem 2015; 54:5970-80. [DOI: 10.1021/acs.inorgchem.5b00783] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Linus Chiang
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Khrystyna Herasymchuk
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Fabrice Thomas
- Département de Chimie Moléculaire,
Chimie Inorganique Redox (CIRE), UMR-5250, Université Grenoble Alpes, BP 53, 38041 Grenoble
Cedex 9, France
| | - Tim Storr
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
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218
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Ali A, Barman SK, Mukherjee R. Palladium(II) Complex of a Redox-Active Amidophenolate-Based O,N,S,N Ligand: Its Monocation and Dication and Reactivity with PPh3. Inorg Chem 2015; 54:5182-94. [DOI: 10.1021/ic503103e] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Akram Ali
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India
| | - Suman K. Barman
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India
- Department of Chemistry, Indian Institute of Science Education and Research Kolkata, Mohanpur 741 246, India
| | - Rabindranath Mukherjee
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India
- Department of Chemistry, Indian Institute of Science Education and Research Kolkata, Mohanpur 741 246, India
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219
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220
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Syntheses, crystal structures, spectral study and DFT calculation of three new copper(II) complexes derived from pyridoxal hydrochloride, N,N-dimethylethylenediamine and N,N-diethylethylenediamine. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.01.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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221
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Sun W, Ren H, Tao Y, Xiao D, Qin X, Deng L, Shao M, Gao J, Chen X. Two Aromatic Rings Coupled a Sulfur-Containing Group to Favor Protein Electron Transfer by Instantaneous Formations of π∴S:π↔π:S∴π or π∴π:S↔π:π∴S Five-Electron Bindings. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2015; 119:9149-9158. [PMID: 26120374 PMCID: PMC4479289 DOI: 10.1021/acs.jpcc.5b01740] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The cooperative interactions among two aromatic rings with a S-containing group are described, which may participate in electron hole transport in proteins. Ab initio calculations reveal the possibility for the formations of the π∴S:π↔π:S∴π and π∴π:S↔π:π∴S five-electron bindings in the corresponding microsurrounding structures in proteins, both facilitating electron hole transport as efficient relay stations. The relay functionality of these two special structures comes from their low local ionization energies and proper binding energies, which varies with the different aromatic amino acids, S-containing residues, and the arrangements of the same aromatic rings according to the local microsurroundings in proteins.
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Affiliation(s)
- Weichao Sun
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400030, People's Republic of China
| | - Haisheng Ren
- Department of Chemistry and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Ye Tao
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400030, People's Republic of China
| | - Dong Xiao
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400030, People's Republic of China
| | - Xin Qin
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400030, People's Republic of China
| | - Li Deng
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400030, People's Republic of China
| | - Mengyao Shao
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400030, People's Republic of China
| | - Jiali Gao
- Department of Chemistry and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Xiaohua Chen
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400030, People's Republic of China
- Department of Chemistry and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
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222
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Yu Y, Lv X, Li J, Zhou Q, Cui C, Hosseinzadeh P, Mukherjee A, Nilges MJ, Wang J, Lu Y. Defining the role of tyrosine and rational tuning of oxidase activity by genetic incorporation of unnatural tyrosine analogs. J Am Chem Soc 2015; 137:4594-7. [PMID: 25672571 PMCID: PMC4676419 DOI: 10.1021/ja5109936] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2014] [Indexed: 12/31/2022]
Abstract
While a conserved tyrosine (Tyr) is found in oxidases, the roles of phenol ring pKa and reduction potential in O2 reduction have not been defined despite many years of research on numerous oxidases and their models. These issues represent major challenges in our understanding of O2 reduction mechanism in bioenergetics. Through genetic incorporation of unnatural amino acid analogs of Tyr, with progressively decreasing pKa of the phenol ring and increasing reduction potential, in the active site of a functional model of oxidase in myoglobin, a linear dependence of both the O2 reduction activity and the fraction of H2O formation with the pKa of the phenol ring has been established. By using these unnatural amino acids as spectroscopic probe, we have provided conclusive evidence for the location of a Tyr radical generated during reaction with H2O2, by the distinctive hyperfine splitting patterns of the halogenated tyrosines and one of its deuterated derivatives incorporated at the 33 position of the protein. These results demonstrate for the first time that enhancing the proton donation ability of the Tyr enhances the oxidase activity, allowing the Tyr analogs to augment enzymatic activity beyond that of natural Tyr.
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Affiliation(s)
- Yang Yu
- Center of Biophysics and Computational Biology, Department of Chemistry, Department of Biochemistry, Illinois EPR Research
Center, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Xiaoxuan Lv
- Laboratory
of Non-Coding RNA, Institute of Biophysics, Chinese Academy of Sciences, Chaoyang District, Beijing, 100101, P. R. China
- University of Chinese
Academy of Sciences, Beijing 100049, P. R. China
| | - Jiasong Li
- Laboratory
of Non-Coding RNA, Institute of Biophysics, Chinese Academy of Sciences, Chaoyang District, Beijing, 100101, P. R. China
- University of Chinese
Academy of Sciences, Beijing 100049, P. R. China
| | - Qing Zhou
- Laboratory
of Non-Coding RNA, Institute of Biophysics, Chinese Academy of Sciences, Chaoyang District, Beijing, 100101, P. R. China
- University of Chinese
Academy of Sciences, Beijing 100049, P. R. China
| | - Chang Cui
- Center of Biophysics and Computational Biology, Department of Chemistry, Department of Biochemistry, Illinois EPR Research
Center, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Parisa Hosseinzadeh
- Center of Biophysics and Computational Biology, Department of Chemistry, Department of Biochemistry, Illinois EPR Research
Center, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Arnab Mukherjee
- Center of Biophysics and Computational Biology, Department of Chemistry, Department of Biochemistry, Illinois EPR Research
Center, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Mark J. Nilges
- Center of Biophysics and Computational Biology, Department of Chemistry, Department of Biochemistry, Illinois EPR Research
Center, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Jiangyun Wang
- Laboratory
of Non-Coding RNA, Institute of Biophysics, Chinese Academy of Sciences, Chaoyang District, Beijing, 100101, P. R. China
- University of Chinese
Academy of Sciences, Beijing 100049, P. R. China
| | - Yi Lu
- Center of Biophysics and Computational Biology, Department of Chemistry, Department of Biochemistry, Illinois EPR Research
Center, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
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223
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Cao Q, Dornan LM, Rogan L, Hughes NL, Muldoon MJ. Aerobic oxidation catalysis with stable radicals. Chem Commun (Camb) 2015; 50:4524-43. [PMID: 24667871 DOI: 10.1039/c3cc47081d] [Citation(s) in RCA: 258] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Selective oxidation reactions are challenging when carried out on an industrial scale. Many traditional methods are undesirable from an environmental or safety point of view. There is a need to develop sustainable catalytic approaches that use molecular oxygen as the terminal oxidant. This review will discuss the use of stable radicals (primarily nitroxyl radicals) in aerobic oxidation catalysis. We will discuss the important advances that have occurred in recent years, highlighting the catalytic performance, mechanistic insights and the expanding synthetic utility of these catalytic systems.
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Affiliation(s)
- Qun Cao
- School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, Stranmillis Road, Belfast, UKBT9 5AG.
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224
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Yang Y, Zhou Q, Wang L, Liu X, Zhang W, Hu M, Dong J, Li J, Xiaoxuan L, Ouyang H, Li H, Gao F, Gong W, Lu Y, Wang J. Significant Improvement of Oxidase Activity through the Genetic Incorporation of a Redox-active Unnatural Amino Acid. Chem Sci 2015; 6:3881-3885. [PMID: 26417427 PMCID: PMC4583198 DOI: 10.1039/c5sc01126d] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2015] [Accepted: 04/13/2015] [Indexed: 12/19/2022] Open
Abstract
Incorporation of 3-methoxytyrosine boosts the oxidase activity of the myoglobin model of oxidase, stressing the importance of the redox potential tuning of tyrosine.
While nature employs various covalent and non-covalent strategies to modulate tyrosine (Y) redox potential and pKa in order to optimize enzyme activities, such approaches have not been systematically applied for the design of functional metalloproteins. Through the genetic incorporation of 3-methoxytyrosine (OMeY) into myoglobin, we replicated important features of cytochrome c oxidase (CcO) in this small soluble protein, which exhibits selective O2 reduction activity while generating a small amount of reactive oxygen species (ROS). These results demonstrate that the electron donating ability of a tyrosine residue in the active site is important for CcO function. Moreover, we elucidated the structural basis for the genetic incorporation of OMeY into proteins by solving the X-ray structure of OMeY specific aminoacyl-tRNA synthetase complexed with OMeY.
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Affiliation(s)
- Yu Yang
- Center of Biophysics and Computational Biology and Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA
| | - Qing Zhou
- Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing, 100101, China
| | - Li Wang
- School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, 230026, China ; Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing, 100101, China
| | - Xiaohong Liu
- Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing, 100101, China
| | - Wei Zhang
- Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing, 100101, China
| | - Meirong Hu
- Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing, 100101, China
| | - Jianshu Dong
- Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing, 100101, China
| | - Jiasong Li
- School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, 230026, China ; Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing, 100101, China
| | - Lv Xiaoxuan
- Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing, 100101, China
| | - Hanlin Ouyang
- Center of Biophysics and Computational Biology and Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA
| | - Han Li
- Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing, 100101, China
| | - Feng Gao
- Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing, 100101, China
| | - Weimin Gong
- Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing, 100101, China
| | - Yi Lu
- Center of Biophysics and Computational Biology and Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA
| | - Jiangyun Wang
- Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing, 100101, China
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225
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Abstract
DesII is a member of the radical SAM family of enzymes that catalyzes radical-mediated transformations of TDP-4-amino-4,6-didexoy-D-glucose as well as other sugar nucleotide diphosphates. Like nearly all radical SAM enzymes, the reactions begin with the reductive homolysis of SAM to produce a 5'-deoxyadenosyl radical which is followed by regiospecific hydrogen atom abstraction from the substrate. What happens next, however, depends on the nature of the substrate radical so produced. In the case of the biosynthetically relevant substrate, a radical-mediated deamination ensues; however, when this amino group is replaced with a hydroxyl, one instead observes dehydrogenation. The factors that govern the fate of the initially generated substrate radical as well as the mechanistic details underlying these transformations have been a key focus of research into the chemistry of DesII. This review will discuss recent discoveries pertaining to the enzymology of DesII, how it may relate to understanding other radical-mediated lyases and dehydrogenases and the working hypotheses currently being investigated regarding the mechanism of DesII catalysis.
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Affiliation(s)
- Mark W. Ruszczycky
- Division of Medicinal Chemistry, College of Pharmacy, University of Texas at Austin, Austin, Texas 78712, United States
| | - Hung-wen Liu
- Department of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States
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226
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Henthorn JT, Lin S, Agapie T. Combination of redox-active ligand and lewis acid for dioxygen reduction with π-bound molybdenum-quinonoid complexes. J Am Chem Soc 2015; 137:1458-64. [PMID: 25577950 DOI: 10.1021/ja5100405] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of π-bound Mo-quinonoid complexes supported by pendant phosphines have been synthesized. Structural characterization revealed strong metal-arene interactions between Mo and the π system of the quinonoid fragment. The Mo-catechol complex (2a) was found to react within minutes with 0.5 equiv of O(2) to yield a Mo-quinone complex (3), H(2)O, and CO. Si- and B-protected Mo-catecholate complexes also react with O(2) to yield 3 along with (R(2)SiO)n and (ArBO)(3) byproducts, respectively. Formally, the Mo-catecholate fragment provides two electrons, while the elements bound to the catecholate moiety act as acceptors for the O(2) oxygens. Unreactive by itself, the Mo-dimethyl catecholate analogue reduces O(2) in the presence of added Lewis acid, B(C(6)F(5))(3), to generate a Mo(I) species and a bis(borane)-supported peroxide dianion, [[(F(5)C(6))(3)B](2)O(2)(2-)], demonstrating single-electron-transfer chemistry from Mo to the O(2) moiety. The intramolecular combination of a molybdenum center, redox-active ligand, and Lewis acid reduces O(2) with pendant acids weaker than B(C(6)F(5))(3). Overall, the π-bound catecholate moiety acts as a two-electron donor. A mechanism is proposed in which O(2) is reduced through an initial one-electron transfer, coupled with transfer of the Lewis acidic moiety bound to the quinonoid oxygen atoms to the reduced O(2) species.
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Affiliation(s)
- Justin T Henthorn
- Division of Chemistry and Chemical Engineering, California Institute of Technology , 1200 East California Boulevard, MC 127-72, Pasadena, California 91125, United States
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227
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Kochem A, Gellon G, Jarjayes O, Philouze C, du Moulinet d'Hardemare A, van Gastel M, Thomas F. Nickel(ii) radical complexes of thiosemicarbazone ligands appended by salicylidene, aminophenol and aminothiophenol moieties. Dalton Trans 2015; 44:12743-56. [DOI: 10.1039/c5dt00944h] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The neutral nickel(ii) complexes are chameleon pro-radical compounds: under their one-electron oxidized form they feature an iminosemiquinonate (or iminothiosemiquinonate) radical, while under their reduced form they are α-diimine π-radicals.
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Affiliation(s)
- Amélie Kochem
- Département de Chimie Moléculaire - Chimie Inorganique Redox Biomimétique (CIRE) - UMR CNRS 5250
- Université J. Fourier
- 38041 Grenoble cedex 9
- France
- Max Planck Institute for Chemical Energy Conversion
| | - Gisèle Gellon
- Département de Chimie Moléculaire - Chimie Inorganique Redox Biomimétique (CIRE) - UMR CNRS 5250
- Université J. Fourier
- 38041 Grenoble cedex 9
- France
| | - Olivier Jarjayes
- Département de Chimie Moléculaire - Chimie Inorganique Redox Biomimétique (CIRE) - UMR CNRS 5250
- Université J. Fourier
- 38041 Grenoble cedex 9
- France
| | - Christian Philouze
- Département de Chimie Moléculaire - Chimie Inorganique Redox Biomimétique (CIRE) - UMR CNRS 5250
- Université J. Fourier
- 38041 Grenoble cedex 9
- France
| | - Amaury du Moulinet d'Hardemare
- Département de Chimie Moléculaire - Chimie Inorganique Redox Biomimétique (CIRE) - UMR CNRS 5250
- Université J. Fourier
- 38041 Grenoble cedex 9
- France
| | - Maurice van Gastel
- Max Planck Institute for Chemical Energy Conversion
- D-45470 Mülheim an der Ruhr
- Germany
| | - Fabrice Thomas
- Département de Chimie Moléculaire - Chimie Inorganique Redox Biomimétique (CIRE) - UMR CNRS 5250
- Université J. Fourier
- 38041 Grenoble cedex 9
- France
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228
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Abstract
In order to address how diverse metalloprotein active sites, in particular those containing iron and copper, guide O₂binding and activation processes to perform diverse functions, studies of synthetic models of the active sites have been performed. These studies have led to deep, fundamental chemical insights into how O₂coordinates to mono- and multinuclear Fe and Cu centers and is reduced to superoxo, peroxo, hydroperoxo, and, after O-O bond scission, oxo species relevant to proposed intermediates in catalysis. Recent advances in understanding the various factors that influence the course of O₂activation by Fe and Cu complexes are surveyed, with an emphasis on evaluating the structure, bonding, and reactivity of intermediates involved. The discussion is guided by an overarching mechanistic paradigm, with differences in detail due to the involvement of disparate metal ions, nuclearities, geometries, and supporting ligands providing a rich tapestry of reaction pathways by which O₂is activated at Fe and Cu sites.
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229
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Mondal MK, Biswas AK, Ganguly B, Mukherjee C. Unprecedented iminobenzosemiquinone and iminobenzoquinone coordinated mononuclear Cu(ii) complex formation under air. Dalton Trans 2015; 44:9375-81. [DOI: 10.1039/c4dt03263b] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ligand H4LS(AP/AP) comprised of two orthogonally placed non-innocent unit that were bridged by a common -ortho S atom. It reacted with CuCl2·2H2O and provided a mononuclear diamagnetic Cu(ii) complex where two non-innocent units were in two different oxidation states.
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Affiliation(s)
| | - Abul Kalam Biswas
- Computation and Simulation Unit (Analytical Discipline and Centralized Instrument Facility)
- CSIR–Central Salt and Marine Chemicals Research Institute
- Bhavnagar-364002
- India
| | - Bishwajit Ganguly
- Computation and Simulation Unit (Analytical Discipline and Centralized Instrument Facility)
- CSIR–Central Salt and Marine Chemicals Research Institute
- Bhavnagar-364002
- India
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230
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Katari M, Payen de la Garanderie E, Nicol E, Steinmetz V, van der Rest G, Carmichael D, Frison G. Combining gas phase electron capture and IRMPD action spectroscopy to probe the electronic structure of a metastable reduced organometallic complex containing a non-innocent ligand. Phys Chem Chem Phys 2015; 17:25689-92. [DOI: 10.1039/c5cp01501d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Gas-phase reduction of a Zn(ii) complex followed by IR spectroscopy shows that the incoming electron is localized on the metal rather than on the ligand.
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Affiliation(s)
- Madanakrishna Katari
- Laboratoire de Chimie Moléculaire
- Ecole polytechnique and CNRS
- 91128 Palaiseau Cedex
- France
| | | | - Edith Nicol
- Laboratoire de Chimie Moléculaire
- Ecole polytechnique and CNRS
- 91128 Palaiseau Cedex
- France
| | - Vincent Steinmetz
- Laboratoire de Chimie Physique
- Université Paris Sud
- CNRS
- 91405 Orsay
- France
| | | | - Duncan Carmichael
- Laboratoire de Chimie Moléculaire
- Ecole polytechnique and CNRS
- 91128 Palaiseau Cedex
- France
| | - Gilles Frison
- Laboratoire de Chimie Moléculaire
- Ecole polytechnique and CNRS
- 91128 Palaiseau Cedex
- France
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231
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Rakshit R, Ghorai S, Sarmah A, Tiwari A, Roy RK, Mukherjee C. Inter-ligand azo (NN) unit formation and stabilization of a Co(ii)-diradical complex via metal-to-ligand dπ–pπ* back donation: synthesis, characterization, and theoretical study. Dalton Trans 2015; 44:3724-7. [DOI: 10.1039/c4dt03214d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ligand H2Rich(AP)N3 provided a diradical-containing Co(ii) complex via an inter-ligand azo (NN) bond formation.
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Affiliation(s)
- Richa Rakshit
- Department of Chemistry
- Indian Institute of Technology
- Guwahati
- India
| | - Samir Ghorai
- Department of Chemistry
- Indian Institute of Technology
- Guwahati
- India
| | - Amrit Sarmah
- Department of Chemistry
- Birla Institute of Technology and Science (BITS)
- Pilani 333031
- India
| | - Archana Tiwari
- Department of Physics
- School of Physical Sciences
- Sikkim University
- India
| | - Ram Kinkar Roy
- Department of Chemistry
- Birla Institute of Technology and Science (BITS)
- Pilani 333031
- India
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232
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Expression, purification, and characterization of galactose oxidase of Fusarium sambucinum in E. coli. Protein Expr Purif 2014; 108:73-79. [PMID: 25543085 PMCID: PMC4370742 DOI: 10.1016/j.pep.2014.12.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 12/14/2014] [Accepted: 12/16/2014] [Indexed: 11/01/2022]
Abstract
A gene encoding a galactose oxidase (GalOx) was isolated from Fusarium sambucinum cultures and overexpressed in Escherichia coli yielding 4.4mg enzyme per L of growth culture with a specific activity of 159Umg(-1). By adding a C-terminal His-tag the enzyme could be easily purified with a single affinity chromatography step with high recovery rate (90%). The enzyme showed a single band on SDS-PAGE with an apparent molecular mass of 68.5kDa. The pH optimum for the oxidation of galactose was in the range of pH 6-7.5. Optimum temperature for the enzyme activity was 35°C, with a half-life of 11.2min, 5.3min, and 2.7min for incubation at 40°C, 50°C, and 60°C, respectively. From all tested substrates, the highest relative activity was found for 1-methyl-β-galactopyranoside (226Umg(-1)) and the highest catalytic efficiency (kcat/Km) for melibiose (2700mM(-1)s(-1)). The enzyme was highly specific for molecular oxygen as an electron acceptor, and showed no appreciable activity with a range of alternative acceptors investigated. Different chemicals were tested for their effect on GalOx activity. The activity was significantly reduced by EDTA, NaN3, and KCN.
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233
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Broere DLJ, Metz LL, de Bruin B, Reek JNH, Siegler MA, van der Vlugt JI. Redox-Active Ligand-Induced Homolytic Bond Activation. Angew Chem Int Ed Engl 2014; 54:1516-20. [DOI: 10.1002/anie.201410048] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 10/30/2014] [Indexed: 01/17/2023]
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234
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Broere DLJ, Metz LL, de Bruin B, Reek JNH, Siegler MA, van der Vlugt JI. Redox-Active Ligand-Induced Homolytic Bond Activation. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201410048] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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235
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Alaji Z, Safaei E, Chiang L, Clarke RM, Mu C, Storr T. A Copper Complex of a Noninnocent Iminophenol-Amidopyridine Hybrid Ligand: Synthesis, Characterization, and Aerobic Alcohol Oxidation. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402687] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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236
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Zhang LB, Hao XQ, Zhang SK, Liu K, Ren B, Gong JF, Niu JL, Song MP. Copper-Mediated Direct Alkoxylation of Arenes Using an N,O-Bidentate Directing System. J Org Chem 2014; 79:10399-409. [DOI: 10.1021/jo502005j] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Lin-Bao Zhang
- The
College of Chemistry and Molecular Engineering, Henan Key Laboratory
of Chemical Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Xin-Qi Hao
- The
College of Chemistry and Molecular Engineering, Henan Key Laboratory
of Chemical Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Shou-Kun Zhang
- The
College of Chemistry and Molecular Engineering, Henan Key Laboratory
of Chemical Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Ke Liu
- The
College of Chemistry and Molecular Engineering, Henan Key Laboratory
of Chemical Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Baozeng Ren
- School
of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Jun-Fang Gong
- The
College of Chemistry and Molecular Engineering, Henan Key Laboratory
of Chemical Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Jun-Long Niu
- The
College of Chemistry and Molecular Engineering, Henan Key Laboratory
of Chemical Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Mao-Ping Song
- The
College of Chemistry and Molecular Engineering, Henan Key Laboratory
of Chemical Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
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237
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Das OINDRILA, Paine TAPANKANTI. Copper Catalysts for Aerobic Oxidation of Alcohols. TRANSITION METAL CATALYSIS IN AEROBIC ALCOHOL OXIDATION 2014. [DOI: 10.1039/9781782621652-00040] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Inspired by reactions catalyzed by galactose oxidase, a copper-containing enzyme, extensive studies were carried out on copper-based catalysts for alcohol oxidation using O2 as the terminal oxidant. Significant advances have been made towards the development of homogeneous and heterogeneous copper catalysts. These advances over the past decades are reviewed.
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Affiliation(s)
- OINDRILA Das
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science 2A&2B Raja S. C. Mullick Road, Jadavpur Kolkata 700032 India
| | - TAPAN KANTI Paine
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science 2A&2B Raja S. C. Mullick Road, Jadavpur Kolkata 700032 India
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238
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Porter T, Kaminsky W, Mayer JM. Preparation, structural characterization, and thermochemistry of an isolable 4-arylphenoxyl radical. J Org Chem 2014; 79:9451-4. [PMID: 25184812 PMCID: PMC4201357 DOI: 10.1021/jo501531a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Indexed: 01/31/2023]
Abstract
The preparation and full characterization of the 4-(nitrophenyl)phenoxyl radical, 2,6-di-(t)butyl-4-(4'-nitrophenyl) phenoxyl radical ((t)Bu2NPArO(•)) is described. This is a rare example of an isolable and crystallographically characterized phenoxyl radical and is the only example in which the parent phenol is also crystallographically well-defined. Analysis of EPR spectra indicates some spin delocalization onto the secondary aromatic ring and nitro group. Equilibrium studies show that the corresponding phenol has an O-H bond dissociation free energy (BDFE) of 77.8 ± 0.5 kcal mol(-1) in MeCN (77.5 ± 0.5 kcal mol(-1) in toluene). This value is higher than related isolated phenoxyl radicals, making this a useful reagent for hydrogen atom transfer (HAT) studies. Additional thermochemical and spectroscopic parameters are also discussed.
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Affiliation(s)
- Thomas
R. Porter
- Department
of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Werner Kaminsky
- Department
of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - James M. Mayer
- Department
of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
- Department
of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520, United States
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239
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Doble MV, Ward AC, Deuss PJ, Jarvis AG, Kamer PC. Catalyst design in oxidation chemistry; from KMnO4 to artificial metalloenzymes. Bioorg Med Chem 2014; 22:5657-77. [DOI: 10.1016/j.bmc.2014.07.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2014] [Revised: 06/27/2014] [Accepted: 07/01/2014] [Indexed: 01/07/2023]
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240
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Kawai M, Yamaguchi T, Masaoka S, Tani F, Kohzuma T, Chiang L, Storr T, Mieda K, Ogura T, Szilagyi RK, Shimazaki Y. Influence of ligand flexibility on the electronic structure of oxidized Ni(III)-phenoxide complexes. Inorg Chem 2014; 53:10195-202. [PMID: 25254603 DOI: 10.1021/ic501181k] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
One-electron-oxidized Ni(III)-phenoxide complexes with salen-type ligands, [Ni(salen)py2](2+) ([1(en)-py](2+)) and [Ni(1,2-salcn)py2](2+) ([1(cn)-py](2+)), with a five-membered chelate dinitrogen backbone and [Ni(salpn)py2](2+) ([2(pn)-py](2+)), with a six-membered chelate backbone, have been characterized with a combination of experimental and theoretical methods. The five-membered chelate complexes [1(en)-py](2+) and [1(cn)-py](2+) were assigned as Ni(III)-phenoxyl radical species, while the six-membered chelate complex [2(pn)-py](2+) was concluded to be a Ni(II)-bis(phenoxyl radical) species with metal-centered reduction in the course of the one-electron oxidation of the Ni(III)-phenoxide complex [2(pn)-py](+). Thus, the oxidation state of the one-electron-oxidized Ni(III) salen-type complexes depends on the chelate ring size of the dinitrogen backbone.
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Affiliation(s)
- Minoru Kawai
- College of Science and ‡Graduate School of Science and Engineering, Ibaraki University , Bunkyo, Mito 310-8512, Japan
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241
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Catalytic performance and mechanism of Cu(II)-hydrazone complexes as models of galactose oxidase. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.06.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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242
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Ryland BL, Stahl SS. Practical aerobic oxidations of alcohols and amines with homogeneous copper/TEMPO and related catalyst systems. Angew Chem Int Ed Engl 2014; 53:8824-38. [PMID: 25044821 PMCID: PMC4165639 DOI: 10.1002/anie.201403110] [Citation(s) in RCA: 388] [Impact Index Per Article: 38.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Indexed: 12/25/2022]
Abstract
Oxidations of alcohols and amines are common reactions in the synthesis of organic molecules in the laboratory and industry. Aerobic oxidation methods have long been sought for these transformations, but few practical methods exist that offer advantages over traditional oxidation methods. Recently developed homogeneous Cu/TEMPO (TEMPO = 2,2,6,6-tetramethylpiperidinyl-N-oxyl) and related catalyst systems appear to fill this void. The reactions exhibit high levels of chemoselectivity and broad functional-group tolerance, and they often operate efficiently at room temperature with ambient air as the oxidant. These advances, together with their historical context and recent applications, are highlighted in this Minireview.
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Affiliation(s)
- Bradford L. Ryland
- Department of Chemistry, University of Wisconsin- Madison 1101 University Avenue, Madison, Wisconsin 53706 (USA)
| | - Shannon S. Stahl
- Department of Chemistry, University of Wisconsin- Madison 1101 University Avenue, Madison, Wisconsin 53706 (USA)
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243
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Kochem A, Carrillo A, Philouze C, van Gastel M, du Moulinet d'Hardemare A, Thomas F. Copper(II)‐Coordinated α‐Azophenols: Effect of the Metal‐Ion Geometry on Phenoxyl/Phenolate Oxidation Potential and Reactivity. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402312] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Amélie Kochem
- Université Grenoble Alpes, Département de Chimie Moléculaire, UMR CNRS 5250, BP 53, 38041 Grenoble Cedex 9, France, http://dcm.ujf‐grenoble.fr
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34‐36, 45470 Mülheim an der Ruhr, Germany, http://www.cec.mpg.de
| | - Alexandre Carrillo
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34‐36, 45470 Mülheim an der Ruhr, Germany, http://www.cec.mpg.de
| | - Christian Philouze
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34‐36, 45470 Mülheim an der Ruhr, Germany, http://www.cec.mpg.de
| | - Maurice van Gastel
- Université Grenoble Alpes, Département de Chimie Moléculaire, UMR CNRS 5250, BP 53, 38041 Grenoble Cedex 9, France, http://dcm.ujf‐grenoble.fr
| | - Amaury du Moulinet d'Hardemare
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34‐36, 45470 Mülheim an der Ruhr, Germany, http://www.cec.mpg.de
| | - Fabrice Thomas
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34‐36, 45470 Mülheim an der Ruhr, Germany, http://www.cec.mpg.de
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244
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Ryland BL, Stahl SS. Praktische aerobe Oxidationen von Alkoholen und Aminen mit dem homogenen Kupfer/TEMPO- und verwandten Katalysatorsystemen. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403110] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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245
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Lecarme L, Chiang L, Philouze C, Jarjayes O, Storr T, Thomas F. Detailed Geometric and Electronic Structures of a One-Electron-Oxidized Ni Salophen Complex and Its Amido Derivatives. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402265] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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246
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Synthesis, characterization and effect of the fluorine substitution on the redox reactivity and in vitro anticancer behaviors of N-polyfluorophenyl-3,5-di-tert-butylsalicylaldimines and their Cu(II) complexes. J Fluor Chem 2014. [DOI: 10.1016/j.jfluchem.2014.03.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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247
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Chiang L, Savard D, Shimazaki Y, Thomas F, Storr T. FeIII Bipyrrolidine Phenoxide Complexes and Their Oxidized Analogues. Inorg Chem 2014; 53:5810-9. [DOI: 10.1021/ic500663x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Linus Chiang
- Department of Chemistry, Simon Fraser University , Burnaby, British Columbia V5A 1S6, Canada
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248
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Fedushkin IL, Skatova AA, Dodonov VA, Chudakova VA, Bazyakina NL, Piskunov AV, Demeshko SV, Fukin GK. Digallane with Redox-Active Diimine Ligand: Dualism of Electron-Transfer Reactions. Inorg Chem 2014; 53:5159-70. [DOI: 10.1021/ic500259k] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Igor L. Fedushkin
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, Nizhny Novgorod 603950, Russian Federation
- Nizhny Novgorod State University, Prospect Gagarina 23, Nizhny Novgorod 603950, Russian Federation
| | - Alexandra A. Skatova
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, Nizhny Novgorod 603950, Russian Federation
| | - Vladimir A. Dodonov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, Nizhny Novgorod 603950, Russian Federation
| | - Valentina A. Chudakova
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, Nizhny Novgorod 603950, Russian Federation
| | - Natalia L. Bazyakina
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, Nizhny Novgorod 603950, Russian Federation
| | - Alexander V. Piskunov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, Nizhny Novgorod 603950, Russian Federation
- Nizhny Novgorod State University, Prospect Gagarina 23, Nizhny Novgorod 603950, Russian Federation
| | - Serhiy V. Demeshko
- Institut für Anorganische Chemie, Georg-August-Universität, Tammannstrasse 4, Göttingen 37077, Germany
| | - Georgy K. Fukin
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, Nizhny Novgorod 603950, Russian Federation
- Nizhny Novgorod State University, Prospect Gagarina 23, Nizhny Novgorod 603950, Russian Federation
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249
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Tyrosine-mediated two-dimensional peptide assembly and its role as a bio-inspired catalytic scaffold. Nat Commun 2014; 5:3665. [DOI: 10.1038/ncomms4665] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 03/14/2014] [Indexed: 12/30/2022] Open
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250
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Migliore A, Polizzi NF, Therien M, Beratan DN. Biochemistry and theory of proton-coupled electron transfer. Chem Rev 2014; 114:3381-465. [PMID: 24684625 PMCID: PMC4317057 DOI: 10.1021/cr4006654] [Citation(s) in RCA: 345] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Indexed: 02/01/2023]
Affiliation(s)
- Agostino Migliore
- Department
of Chemistry, Department of Biochemistry, and Department of Physics, Duke University, Durham, North Carolina 27708, United States
| | - Nicholas F. Polizzi
- Department
of Chemistry, Department of Biochemistry, and Department of Physics, Duke University, Durham, North Carolina 27708, United States
| | - Michael
J. Therien
- Department
of Chemistry, Department of Biochemistry, and Department of Physics, Duke University, Durham, North Carolina 27708, United States
| | - David N. Beratan
- Department
of Chemistry, Department of Biochemistry, and Department of Physics, Duke University, Durham, North Carolina 27708, United States
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