1
|
Liu L, Hu J, Tang J, Chen S, Wu L, Li Z, Hou H, Liang S, Yang J. Peroxymonosulfate activation by trace iron(III) porphyrin for facile degradation of organic pollutants via nonradical oxidation. CHEMOSPHERE 2024; 349:140847. [PMID: 38043614 DOI: 10.1016/j.chemosphere.2023.140847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 11/07/2023] [Accepted: 11/27/2023] [Indexed: 12/05/2023]
Abstract
Nonradical species with great resistance to interference have shown great advantages in complex wastewater treatment. Herein, a novel system constructed by biodegradable tetrakis-(4-carboxyphenyl)-porphyrinatoiron(III) (FeIII-TCPP) and peroxymonosulfate (PMS) was proposed for facile decontamination. Nonradical pathway is observed in FeIII-TCPP/PMS, where 1O2 and high-valent iron-oxo species play dominant roles. The genres and valence of high-valent iron-oxo species, including iron(IV)-oxo porphyrin radical-cationic species [OFeIV-TCPP•+] and iron(IV)-hydroxide species [FeIV-TCPP(OH)], are ascertained, along with their generation mechanism. The axial ligand on the iron axial site affects the ground spin state of FeIII-TCPP, further influencing the thermodynamic reaction pathway of active species. With trace catalyst in micromoles, FeIII-TCPP exhibits high efficiency by degrading bisphenol S (BPS) completely within 5 min, while Co2+/PMS can only achieve a maximum of 26.2% under identical condition. Beneficial from nonradical pathways, FeIII-TCPP/PMS demonstrates a wide pH range of 3-10 and exhibits minimal sensitivity to interference of concomitant materials. BPS is primarily eliminated through β-scission and hydroxylation. Specifically, 1O2 electrophilically attacks the C-S bond of BPS, while high-valent iron-oxo species interacts with BPS through an oxygen-bound mechanism. This study provides novel insights into efficient activation of PMS by iron porphyrin, enabling the removal of refractory pollutants through nonradical pathway.
Collapse
Affiliation(s)
- Lu Liu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Technology Research Center of Water Supply Safety and Pollution Control, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| | - Jingping Hu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Technology Research Center of Water Supply Safety and Pollution Control, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China.
| | - Jianjian Tang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Technology Research Center of Water Supply Safety and Pollution Control, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| | - Sijing Chen
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Technology Research Center of Water Supply Safety and Pollution Control, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| | - Longsheng Wu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Technology Research Center of Water Supply Safety and Pollution Control, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| | - Zhen Li
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Technology Research Center of Water Supply Safety and Pollution Control, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| | - Huijie Hou
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Technology Research Center of Water Supply Safety and Pollution Control, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| | - Sha Liang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Technology Research Center of Water Supply Safety and Pollution Control, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| | - Jiakuan Yang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Technology Research Center of Water Supply Safety and Pollution Control, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| |
Collapse
|
2
|
Yang X, Hu J, Wu L, Hou H, Liang S, Yang J. Cooperation of multiple active species generated in hydrogen peroxide activation by iron porphyrin for phenolic pollutants degradation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 313:120097. [PMID: 36089136 DOI: 10.1016/j.envpol.2022.120097] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 08/25/2022] [Accepted: 08/30/2022] [Indexed: 06/15/2023]
Abstract
The narrow acid pH range and the nonselectivity of the dominant •OH limit the Fenton systems to remediate the organic wastewater. Inspired by the role of heme in physiological processes, we employed iron porphyrin as a novel homogeneous catalyst to address this issue. Multiple active species are identified during the activation of H2O2, including high-valent iron porphyrin ((por)Fe(IV)) species ((por)Fe(IV)-OH, (por)+•Fe(IV)=O) and oxygen-centered radicals (•OH, HO2•/•O2-), as well as atomic hydrogen (*H) and carbon-centered radicals. With the cooperation of these active species, the degradation of pollutants could be resistant to the interference of concomitant ions and proceed over a wide pH range. This cooperative behavior is further verified by intermediates identified from bisphenol A degradation. Specifically, the presence of *H could facilitate the cleavage of the C-C bond and the addition of unsaturated or aromatic molecules. (Por)+•Fe(IV)=O could hydroxylate substrates with an oxygen rebound mechanism. Hydrogen atom abstraction of contaminants could be performed by (por)Fe(IV)-OH to form desaturated products by attacking oxygen-centered radicals. The ecotoxicity of bisphenol A could be significantly decreased through degradation. This study would provide a new approach to wastewater treatment and shed light on the interaction between metalloporphyrin and peroxide in an aqueous solution.
Collapse
Affiliation(s)
- Xiaorong Yang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| | - Jingping Hu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Technology Research Center of Water Supply Safety and Pollution Control, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China.
| | - Longsheng Wu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| | - Huijie Hou
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| | - Sha Liang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| | - Jiakuan Yang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Technology Research Center of Water Supply Safety and Pollution Control, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| |
Collapse
|
3
|
Yamada Y, Kura J, Toyoda Y, Tanaka K. High catalytic methane oxidation activity of monocationic μ-nitrido-bridged iron phthalocyanine dimer with sixteen methyl groups. Dalton Trans 2021; 50:6718-6724. [PMID: 33908999 DOI: 10.1039/d1dt00941a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Herein, we report the highly potent catalytic methane oxidation activity of a monocationic μ-nitrido-bridged iron phthalocyanine dimer with 16 peripheral methyl groups. It was confirmed that this complex oxidized methane stably into MeOH, HCHO, and HCOOH in a catalytic manner in an acidic aqueous solution containing excess H2O2 at 60 °C. The total turnover number of the reaction reached 135 after 12 h, which is almost seven times higher than that of a monocatinoic μ-nitrido-bridged iron phthalocyanine dimer with no peripheral substituents. This suggests that the increased number of peripheral electron-donating substituents could have facilitated the generation of a reactive high-valent iron-oxo species as well as hydrogen abstraction from methane by the reactive iron-oxo species.
Collapse
Affiliation(s)
- Yasuyuki Yamada
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan. and Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan and JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Jyunichi Kura
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan.
| | - Yuka Toyoda
- Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Kentaro Tanaka
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan.
| |
Collapse
|
4
|
Pieszka M, Han S, Volkmann C, Graf R, Lieberwirth I, Landfester K, Ng DYW, Weil T. Controlled Supramolecular Assembly Inside Living Cells by Sequential Multistaged Chemical Reactions. J Am Chem Soc 2020; 142:15780-15789. [PMID: 32812422 PMCID: PMC7499420 DOI: 10.1021/jacs.0c05261] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Synthetic assembly within living cells represents an innovative way to explore purely chemical tools that can direct and control cellular behavior. We use a simple and modular platform that is broadly accessible and yet incorporates highly intricate molecular recognition, immolative, and rearrangement chemistry. Short bimodular peptide sequences undergo a programmed sequence of events that can be tailored within the living intracellular environment. Each sequential stage of the pathways beginning with the cellular uptake, intracellular transport, and localization imposes distinct structural changes that result in the assembly of fibrillar architectures inside cells. The observation of apoptosis, which is characterized by the binding of Annexin V, demonstrates that programmed cell death can be promoted by the peptide assembly. Higher complexity of the assemblies was also achieved by coassembly of two different sequences, resulting in intrinsically fluorescent architectures. As such, we demonstrate that the in situ construction of architectures within cells will broaden the community's perspective toward how structure formation can impact a living system.
Collapse
Affiliation(s)
- Michaela Pieszka
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.,Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Shen Han
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Christiane Volkmann
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Robert Graf
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Ingo Lieberwirth
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Katharina Landfester
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - David Y W Ng
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Tanja Weil
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.,Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| |
Collapse
|
5
|
Liu C, Liu K, Mukhopadhyay A, Paulino V, Bernard B, Olivier JH. Butadiyne-Bridged (Porphinato)Zinc(II) Chromophores Assemble into Free-Standing Nanosheets. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00345] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Chuan Liu
- Department of Chemistry, The University of Miami, 1301 Memorial Drive, Cox Science Building, Coral Gables, Florida 33146, United States
| | - Kaixuan Liu
- Department of Chemistry, The University of Miami, 1301 Memorial Drive, Cox Science Building, Coral Gables, Florida 33146, United States
| | - Arindam Mukhopadhyay
- Department of Chemistry, The University of Miami, 1301 Memorial Drive, Cox Science Building, Coral Gables, Florida 33146, United States
| | - Victor Paulino
- Department of Chemistry, The University of Miami, 1301 Memorial Drive, Cox Science Building, Coral Gables, Florida 33146, United States
| | - Brianna Bernard
- Department of Chemistry, The University of Miami, 1301 Memorial Drive, Cox Science Building, Coral Gables, Florida 33146, United States
| | - Jean-Hubert Olivier
- Department of Chemistry, The University of Miami, 1301 Memorial Drive, Cox Science Building, Coral Gables, Florida 33146, United States
| |
Collapse
|
6
|
Zhang P, Hu J, Liu B, Yang J, Hou H. Recent advances in metalloporphyrins for environmental and energy applications. CHEMOSPHERE 2019; 219:617-635. [PMID: 30554049 DOI: 10.1016/j.chemosphere.2018.12.024] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 11/30/2018] [Accepted: 12/03/2018] [Indexed: 06/09/2023]
Abstract
Porphyrin-based chemistry has reached an unprecedented period of rapid development after decades of study. Due to attractive multifunctional properties, porphyrins and their analogues have emerged as multifunctional organometals for environmental and energy purposes. In particular, pioneer works have been conducted to explore their application in pollution abatement, energy conversion and storage and molecule recognition. This review summarizes recent advances of porphyrins chemistry, focusing on elucidating the nature of catalytic process. The Fenton-like redox chemistry and photo-excitability of porphyrins and their analogues are discussed, highlighting the generation of high-valent iron oxo porphyrin species. Finally, challenges in current research are identified and perspectives for future development in this area are presented.
Collapse
Affiliation(s)
- Peng Zhang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| | - Jingping Hu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China.
| | - Bingchuan Liu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| | - Jiakuan Yang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| | - Huijie Hou
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China.
| |
Collapse
|
7
|
|
8
|
Novel PEI–AuNPs–Mn III PPIX nanocomposite with enhanced peroxidase-like catalytic activity in aqueous media. CR CHIM 2018. [DOI: 10.1016/j.crci.2017.11.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
|
9
|
Dembowski M, Colla CA, Yu P, Qiu J, Szymanowski JES, Casey WH, Burns PC. The Propensity of Uranium-Peroxide Systems to Preserve Nanosized Assemblies. Inorg Chem 2017; 56:9602-9608. [DOI: 10.1021/acs.inorgchem.7b01095] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mateusz Dembowski
- Department of Chemistry
and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Christopher A. Colla
- Department of Earth and Planetary Sciences, University of California, Davis, California 95616, United States
| | - Ping Yu
- The Keck NMR Facility, University of California, Davis, California 95616, United States
| | - Jie Qiu
- Department of Civil and Environmental Engineering
and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Jennifer E. S. Szymanowski
- Department of Civil and Environmental Engineering
and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - William H. Casey
- Department of Earth and Planetary Sciences, University of California, Davis, California 95616, United States
- Department of Chemistry, University of California, Davis, California 95616, United States
| | - Peter C. Burns
- Department of Chemistry
and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Civil and Environmental Engineering
and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| |
Collapse
|
10
|
Oszajca M, Brindell M, Orzeł Ł, Dąbrowski JM, Śpiewak K, Łabuz P, Pacia M, Stochel-Gaudyn A, Macyk W, van Eldik R, Stochel G. Mechanistic studies on versatile metal-assisted hydrogen peroxide activation processes for biomedical and environmental incentives. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.05.013] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
11
|
Bosshart H. Supra-therapeutic plasma concentrations of haloperidol induce moderate inhibition of lipopolysaccharide-induced interleukin-8 release in human monocytes. ANNALS OF TRANSLATIONAL MEDICINE 2016; 4:396. [PMID: 27867948 DOI: 10.21037/atm.2016.10.56] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND The clinical use of antipsychotics and mood-stabilizing drugs with proven efficacy is largely determined by the occurrence of treatment-emergent adverse events and routine clinical chemistry and haematology data, which together define the safety and tolerability profile of these psychopharmaceuticals. Whereas the effects of mood-stabilizing drugs on functional properties of blood cells have been poorly investigated, the effects of antipsychotics have received more attention. Such studies have yielded conflicting results. This study examined the effects of the mood-stabilizing drugs carbamazepine and valproic acid and of the antipsychotic drugs olanzapine, risperidone and haloperidol on the production of the pro-inflammatory chemokine interleukin-8 (IL-8), which is released from human monocytes when activated by Gram-negative lipopolysaccharide (LPS). METHODS Peripheral human whole blood was diluted with Roswell Park Memorial Institute (RPMI) cell culture medium and stimulated with LPS. Accumulating IL-8 was quantified in the supernatant with an adapted enzyme-linked immunosorbent assay (ELISA) and the results correlated to the number of monocytes at venipuncture. RESULTS At supra-therapeutic concentrations of 100 µM, haloperidol inhibited the LPS-induced release of IL-8 in peripheral human monocytes moderately, whereas olanzapine, risperidone, carbamazepine and valproic acid showed no such effect. CONCLUSIONS The results suggest that these mood-stabilizing drugs and antipsychotics are endowed with clinically favorable inertness rather than pro-inflammatory properties.
Collapse
Affiliation(s)
- Herbert Bosshart
- Psychiatric Outpatient Facility, Turnerstrasse 7a, CH-8006 Zurich, Switzerland
| |
Collapse
|
12
|
Oszajca M, Franke A, Brindell M, Stochel G, van Eldik R. Redox cycling in the activation of peroxides by iron porphyrin and manganese complexes. ‘Catching’ catalytic active intermediates. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.01.013] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
13
|
Cai YB, Li XH, Jing J, Zhang JL. Effect of distal histidines on hydrogen peroxide activation by manganese reconstituted myoglobin. Metallomics 2014; 5:828-35. [PMID: 23575474 DOI: 10.1039/c3mt20275e] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Myoglobins provide an opportunity to investigate the effect of the secondary coordination sphere on the functionality and reactivity of non-native metal porphyrins inside well-defined protein scaffolds. In this work, we reconstituted myoglobin by the replacement of natural heme with manganese(iii) protoporphyrin IX and firstly investigated the effect of distal histidine on the reaction of Mn(III) porphyrin with H2O2 and one-electron oxidation of ABTS. We have prepared L29H, F43H, H64F, L29H/H64F, F43H/H64F, L29H/F43H and L29H/F43H/H64F mutants and reconstituted apo-myoglobins with manganese(iii) protoporphyrin IX. Distal histidine at the 64 position plays an essential role in binding H2O2 through hydrogen bond formation, which facilitates the coordination of H2O2 to the Mn center. The second histidine at the 43 position is important in the cleavage of the O-O bond and to form the highly valent Mn(iv)-oxo intermediate. His29 has less efficiency to activate H2O2, because it is too far from the Mn center. The cooperative effect of dual distal histidines at positions 64 and 43 on the activation of H2O2 was observed and the F43H Mn(III)Mb mutant exhibited 5-fold and 10-fold reaction rate increases in the activation of H2O2 and one-electron oxidation of ABTS versus wild-type Mn(III)Mb. This is different from the distal histidine effect on the H2O2 activation by heme in Mb. This work will provide new insights to understand the fundamental chemistry of manganese in oxidation, and further construct biomimetic Mn models for peroxidase, inside or outside of protein scaffolds.
Collapse
Affiliation(s)
- Yuan-Bo Cai
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing, P. R. China
| | | | | | | |
Collapse
|
14
|
Mayfield JA, Blanc B, Rodgers KR, Lukat-Rodgers GS, DuBois JL. Peroxidase-type reactions suggest a heterolytic/nucleophilic O-O joining mechanism in the heme-dependent chlorite dismutase. Biochemistry 2013; 52:6982-94. [PMID: 24001266 DOI: 10.1021/bi4005599] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Heme-containing chlorite dismutases (Clds) catalyze a highly unusual O-O bond-forming reaction. The O-O cleaving reactions of hydrogen peroxide and peracetic acid (PAA) with the Cld from Dechloromonas aromatica (DaCld) were studied to better understand the Cl-O cleavage of the natural substrate and subsequent O-O bond formation. While reactions with H2O2 result in slow destruction of the heme, at acidic pH heterolytic cleavage of the O-O bond of PAA cleanly yields the ferryl porphyrin cation radical (compound I). At alkaline pH, the reaction proceeds more rapidly, and the first observed intermediate is a ferryl heme. Freeze-quench EPR confirmed that the latter has an uncoupled protein-based radical, indicating that compound I is the first intermediate formed at all pH values and that radical migration is faster at alkaline pH. These results suggest by analogy that two-electron Cl-O bond cleavage to yield a ferryl-porphyrin cation radical is the most likely initial step in O-O bond formation from chlorite.
Collapse
Affiliation(s)
- Jeffrey A Mayfield
- Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States
| | | | | | | | | |
Collapse
|
15
|
Larsen RW, Wojtas L, Perman J, Musselman RL, Zaworotko MJ, Vetromile CM. Mimicking Heme Enzymes in the Solid State: Metal–Organic Materials with Selectively Encapsulated Heme. J Am Chem Soc 2011; 133:10356-9. [DOI: 10.1021/ja203068u] [Citation(s) in RCA: 157] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Randy W. Larsen
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Lukasz Wojtas
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Jason Perman
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Ronald L. Musselman
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Michael J. Zaworotko
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Carissa M. Vetromile
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| |
Collapse
|
16
|
Mahammed A, Gross Z. Highly efficient catalase activity of metallocorroles. Chem Commun (Camb) 2010; 46:7040-2. [PMID: 20730224 DOI: 10.1039/c0cc01989e] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The iron(iii) complex of a bipolar and amphiphilic corrole, which binds strongly to proteins and undergoes protein-mediated cellular uptake, catalyzes the decomposition of hydrogen peroxide faster (k(cat) = 6400 M(-1) s(-1)) and more efficiently (turnover frequency >120 s(-1)) than previously reported synthetic compounds with catalase-like activity.
Collapse
Affiliation(s)
- Atif Mahammed
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | | |
Collapse
|
17
|
Silveira-Lacerda EDP, Vilanova-Costa CAST, Hamaguchi A, Pavanin LA, Goulart LR, Homsi-Brandenburgo MI, Dos Santos WB, Soares AM, Nomizo A. The ruthenium complex cis-(dichloro)tetraammineruthenium(III) chloride presents selective cytotoxicity against murine B cell lymphoma (A-20), murine ascitic sarcoma 180 (S-180), human breast adenocarcinoma (SK-BR-3), and human T cell leukemia (Jurkat) tumor cell lines. Biol Trace Elem Res 2010; 135:98-111. [PMID: 19727575 DOI: 10.1007/s12011-009-8498-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2009] [Accepted: 08/06/2009] [Indexed: 11/30/2022]
Abstract
The aim of present study was to verify the in vitro antitumor activity of a ruthenium complex, cis-(dichloro)tetraammineruthenium(III) chloride (cis-[RuCl(2)(NH(3))(4)]Cl) toward different tumor cell lines. The antitumor studies showed that ruthenium(III) complex presents a relevant cytotoxic activity against murine B cell lymphoma (A-20), murine ascitic sarcoma 180 (S-180), human breast adenocarcinoma (SK-BR-3), and human T cell leukemia (Jurkat) cell lines and a very low cytotoxicity toward human peripheral blood mononuclear cells. The ruthenium(III) complex decreased the fraction of tumor cells in G0/G1 and/or G2-M phases, indicating that this compound may act on resting/early entering G0/G1 cells and/or precycling G2-M cells. The cytotoxic activity of a high concentration (2 mg mL(-1)) of cis-[RuCl(2)(NH(3))(4)]Cl toward Jurkat cells correlated with an increased number of annexin V-positive cells and also the presence of DNA fragmentation, suggesting that this compound induces apoptosis in tumor cells. The development of new antineoplastic medications demands adequate knowledge in order to avoid inefficient or toxic treatments. Thus, a mechanistic understanding of how metal complexes achieve their activities is crucial to their clinical success and to the rational design of new compounds with improved potency.
Collapse
Affiliation(s)
- Elisângela de Paula Silveira-Lacerda
- Laboratório de Genética Molecular e Citogenética, Instituto de Ciências Biológicas-ICB I-Sala 200, Universidade Federal de Goiás-UFG, Campus Samambaia Campus II, Goiânia, Goiás, Brazil.
| | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Zhang JL, Garner DK, Liang L, Barrios DA, Lu Y. Noncovalent modulation of pH-dependent reactivity of a Mn-salen cofactor in myoglobin with hydrogen peroxide. Chemistry 2009; 15:7481-9. [PMID: 19557774 DOI: 10.1002/chem.200802449] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
To demonstrate protein modulation of metal-cofactor reactivity through noncovalent interactions, pH-dependent sulfoxidation and 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) oxidation reactivity of a designed myoglobin (Mb) containing non-native Mn-salen complex (1) was investigated using H2O2 as the oxidant. Incorporation of 1 inside the Mb resulted in an increase in the turnover numbers through exclusion of water from the metal complex and prevention of Mn-salen dimer formation. Interestingly, the presence of protein in itself is not enough to confer the increase activity as mutation of the distal His64 in Mb to Phe to remove hydrogen-bonding interactions resulted in no increase in the turnover numbers, while mutation His64 to Arg, another residue with ability to hydrogen-bond interactions, resulted in an increase in reactivity. These results strongly suggest that the distal ligand His64, through its hydrogen-bonding interaction, plays important roles in enhancing and fine-tuning reactivity of the Mn-salen complex. Nonlinear least-squares fitting of rate versus pH plots demonstrates that 1.Mb(H64X) (X=H, R and F) and the control Mn-salen 1 exhibit pKa values varying from pH 6.4 to 8.3, and that the lower pKa of the distal ligand in 1.Mb(H64X), the higher the reactivity it achieves. Moreover, in addition to the pKa at high pH, 1.Mb displays another pKa at low pH, with pKa of 5.0+/-0.08. A comparison of the effect of different pH on sulfoxidation and ABTS oxidation indicates that, while the intermediate produced at low pH conditions could only perform sulfoxidation, the intermediate at high pH could oxidize both sulfoxides and ABTS. Such a fine-control of reactivity through hydrogen-bonding interactions by the distal ligand to bind, orient and activate H2O2 is very important for designing artificial enzymes with dramatic different and tunable reactivity from catalysts without protein scaffolds.
Collapse
Affiliation(s)
- Jun-Long Zhang
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave., Urbana, IL 61801, USA
| | | | | | | | | |
Collapse
|
19
|
Sharma VK, Cabelli D. Reduction of Oxyiron(V) by Sulfite and Thiosulfate in Aqueous Solution. J Phys Chem A 2009; 113:8901-6. [DOI: 10.1021/jp901994x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Virender K. Sharma
- Department of Chemistry, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida 32901, and Chemistry Department, Brookhaven National Laboratory, Upton, Long Island, New York 11973
| | - Diane Cabelli
- Department of Chemistry, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida 32901, and Chemistry Department, Brookhaven National Laboratory, Upton, Long Island, New York 11973
| |
Collapse
|
20
|
Brausam A, Eigler S, Jux N, van Eldik R. Mechanistic Investigations of the Reaction of an Iron(III) Octa-Anionic Porphyrin Complex with Hydrogen Peroxide and the Catalyzed Oxidation of Diammonium-2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonate). Inorg Chem 2009; 48:7667-78. [DOI: 10.1021/ic9005955] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ariane Brausam
- Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Siegfried Eigler
- Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Norbert Jux
- Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Rudi van Eldik
- Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| |
Collapse
|
21
|
Hou MH, Lu WJ, Lin HY, Yuann JMP. Studies of Sequence-Specific DNA Binding, DNA Cleavage, and Topoisomerase I Inhibition by the Dimeric Chromomycin A3 Complexed with FeII. Biochemistry 2008; 47:5493-502. [DOI: 10.1021/bi701915f] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ming-Hon Hou
- Biotechnology Center, National Chung Hsing University, Taichung, 402 Taiwan, Institute of Bioinformatics, National Chung Hsing University, Taichung, 402 Taiwan, Department of Life Science, National Chung Hsing University, Taichung, 402 Taiwan, and Department of Biotechnology, Ming Chuan University, Taoyuan County, 333 Taiwan
| | - Wen-Je Lu
- Biotechnology Center, National Chung Hsing University, Taichung, 402 Taiwan, Institute of Bioinformatics, National Chung Hsing University, Taichung, 402 Taiwan, Department of Life Science, National Chung Hsing University, Taichung, 402 Taiwan, and Department of Biotechnology, Ming Chuan University, Taoyuan County, 333 Taiwan
| | - Hsin-Ying Lin
- Biotechnology Center, National Chung Hsing University, Taichung, 402 Taiwan, Institute of Bioinformatics, National Chung Hsing University, Taichung, 402 Taiwan, Department of Life Science, National Chung Hsing University, Taichung, 402 Taiwan, and Department of Biotechnology, Ming Chuan University, Taoyuan County, 333 Taiwan
| | - Jeu-Ming P. Yuann
- Biotechnology Center, National Chung Hsing University, Taichung, 402 Taiwan, Institute of Bioinformatics, National Chung Hsing University, Taichung, 402 Taiwan, Department of Life Science, National Chung Hsing University, Taichung, 402 Taiwan, and Department of Biotechnology, Ming Chuan University, Taoyuan County, 333 Taiwan
| |
Collapse
|
22
|
Nakayama N, Tsuchiya S, Ogawa S. Hydrocarbon oxidation with hydrogen peroxide and pentafluoroiodosylbenzene catalyzed by unusually distorted macrocycle manganese complexes. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.molcata.2007.07.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
23
|
Sychev AY, Isak VG. Iron compounds and the mechanisms of the homogeneous catalysis of the activation of O2and H2O2and of the oxidation of organic substrates. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc1995v064n12abeh000195] [Citation(s) in RCA: 122] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
24
|
Shintaku M, Matsuura K, Yoshioka S, Takahashi S, Ishimori K, Morishima I. Absence of a detectable intermediate in the compound I formation of horseradish peroxidase at ambient temperature. J Biol Chem 2005; 280:40934-8. [PMID: 16221678 DOI: 10.1074/jbc.m503472200] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A microsecond-resolved absorption spectrometer was developed to investigate the elementary steps in hydrogen peroxide (H(2)O(2)) activation reaction of horseradish peroxidase (HRP) at ambient temperature. The kinetic absorption spectra of HRP upon the mixing with various concentrations of H(2)O(2) (0.5-3 mm) were monitored in the time range from 50 to 300 mus. The time-resolved spectra in the Soret region possessed isosbestic points that were close to those between the resting state and compound I. The kinetic changes in the Soret absorbance could be well fitted by a single exponential function. Accordingly, no distinct spectrum of the putative intermediate between the resting state and compound I was identified. These results were consistent with the proposal that the O-O bond activation in heme peroxidases is promoted by the imidazolium form of the distal histidine that exists only transiently. It was estimated that the rate constant for the breakage of the O-O bond in H(2)O(2) by HRP is significantly faster than 1 x 10(4) s(-1).
Collapse
Affiliation(s)
- Masato Shintaku
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo, Kyoto 615-8510, Japan
| | | | | | | | | | | |
Collapse
|
25
|
Erman JE, Vitello LB. Yeast cytochrome c peroxidase: mechanistic studies via protein engineering. BIOCHIMICA ET BIOPHYSICA ACTA 2002; 1597:193-220. [PMID: 12044899 DOI: 10.1016/s0167-4838(02)00317-5] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Cytochrome c peroxidase (CcP) is a yeast mitochondrial enzyme that catalyzes the reduction of hydrogen peroxide to water by ferrocytochrome c. It was the first heme enzyme to have its crystallographic structure determined and, as a consequence, has played a pivotal role in developing ideas about structural control of heme protein reactivity. Genetic engineering of the active site of CcP, along with structural, spectroscopic, and kinetic characterization of the mutant proteins has provided considerable insight into the mechanism of hydrogen peroxide activation, oxygen-oxygen bond cleavage, and formation of the higher-oxidation state intermediates in heme enzymes. The catalytic mechanism involves complex formation between cytochrome c and CcP. The cytochrome c/CcP system has been very useful in elucidating the complexities of long-range electron transfer in biological systems, including protein-protein recognition, complex formation, and intracomplex electron transfer processes.
Collapse
Affiliation(s)
- James E Erman
- Department of Chemistry and Biochemistry, Northern Illinois University, Normal Rd., DeKalb, IL 60115-2862, USA.
| | | |
Collapse
|
26
|
Abstract
The present paper highlights and reviews current research in the field of hemoprotein models. Hemoproteins have been extensively studied in order to understand structure-function relationships, and to design new molecules with desired functions. A wide number of synthetic analogues have been developed, using quite different approaches. They differ in molecular structures, ranging from simple meso-substituted tetraaryl-metalloporphyrins and peptide-porphyrin conjugates. In this paper we summarize the state of the art on peptide based hemoprotein models. We also report here the approach used by us to develop a new class of molecules, named mimochromes. They can be regarded as miniaturized hemoproteins, because mimochromes are low molecular weight compounds with some structural and functional properties common to those of the parent high molecular weight protein. The basic structure of mimochromes is a deuteroporphyrin ring covalently linked to two helical peptide chains. Two molecules of this series have been fully characterized. All the information derived from their structural analysis has been applied to the design of new analogues with additional functions.
Collapse
Affiliation(s)
- F Nastri
- Centro Interuniversitario di Ricerca sui Peptidi Bioattivi, Napoli, Italy
| | | | | | | | | | | |
Collapse
|
27
|
Rubino FM, Banfi S, Pozzi G, Quici S. A study on the solution and gas-phase chemistry of Mn(III) and Fe(III) tetraarylporphyrin complexes by fast-atom bombardment mass spectrometry : 1: Generation of molecular signals. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 1993; 4:249-254. [PMID: 24234854 DOI: 10.1016/1044-0305(93)85088-f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/1992] [Revised: 10/26/1992] [Accepted: 10/28/1992] [Indexed: 06/02/2023]
Abstract
Fast-atom bombardment mass spectrometry has been used to investigate the chemical behavior of Fe(III) and Mn(III) tetraarylporphyrins (TAP) in both the condensed and gas phases and to clarify the mechanisms responsible for the production of positive and negative ions. The differences in the behavior of Fe(III) and Mn(III) complexes in the positive ion mode could be correlated with those in their electronic structures and knowledge of the mechanism for the generation of negatively charged species was applied to characterize the counterion coordinated to the Mn(III)-TAP. Thus, the unprecedented, complete characterization of even complex Mn(III)-TAP was made possible.
Collapse
Affiliation(s)
- F M Rubino
- ITBA-CNR, v. Ampere 56, I-20131, Miland, Italy
| | | | | | | |
Collapse
|
28
|
Adams PA. The peroxidasic activity of the haem octapeptide microperoxidase-8 (MP-8): the kinetic mechanism of the catalytic reduction of H2O2by MP-8 using 2,2′-azinobis-(3-ethylbenzothiazoline-6-sulphonate)(ABTS) as reducing substrate. ACTA ACUST UNITED AC 1990. [DOI: 10.1039/p29900001407] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
29
|
Vygodina TV, Konstantinov AA. H2O2-induced conversion of cytochrome c oxidase peroxy complex to oxoferryl state. Ann N Y Acad Sci 1988; 550:124-38. [PMID: 2854384 DOI: 10.1111/j.1749-6632.1988.tb35329.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Addition of high H2O2 concentrations to a peroxy complex of proteoliposome-bound cytochrome oxidase converts the complex to a spectrally distinct species. The difference spectrum of the high-peroxide compound versus the oxidized enzyme is characterized in a visible range by a broad symmetrical band at 580 nm (delta epsilon approximately equal to 4 mM-1 cm-1) with a minor second maximum at approximately 535 nm; a complete disappearance of the 605-607-nm peak occurs which is typical of the peroxy complex. In the Soret band, the spectrum of the high H2O2 compound is virtually indistinguishable from that of the initial peroxide adduct. The high-peroxide compound appears to be identical with an oxoferryl intermediate formed in the forward and reversed cytochrome oxidase reaction. The transition of the peroxy complex to the oxoferryl state is favored by alkaline pH and counteracted by ferricyanide. The peroxy and oxoferryl complexes of cytochrome c oxidase can also be formed with t-butylhydroperoxide.
Collapse
Affiliation(s)
- T V Vygodina
- A.N. Belozersky Laboratory of Molecular Biology and Bioorganic Chemistry, Moscow State University, U.S.S.R
| | | |
Collapse
|