1
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Huang SY, Pierre VC. Achieving Selectivity for Phosphate over Pyrophosphate in Ethanol with Iron(III)-Based Fluorescent Probes. JACS AU 2022; 2:1604-1609. [PMID: 35911450 PMCID: PMC9326827 DOI: 10.1021/jacsau.2c00200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Two iron(III)-based molecular receptors employing 1,2-hydroxypyridinone ligands were developed for phosphate recognition and fluorescence sensing via indicator displacement assay (IDA). The tetra- and pentadentate ligands enable anion recognition by the iron(III) center via its remaining one or two open coordination sites. Weak protective coordination of fluorescein at those sites prevents the formation of μ-oxo dimers in aerated solutions. Its rapid and selective displacement by inorganic phosphate results in a 20-fold increase in the fluorescence of the indicator. Both receptors exhibit high affinity for inorganic phosphate and high selectivity over common competing anions, including halides, acetate, carbonate, and, remarkably, pyrophosphate as well as arsenate. Coordination of phosphate to the iron(III) center was confirmed by ATR-IR and 31P NMR spectroscopy.
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2
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Mao Q, Das PK, Le Gac S, Boitrel B, Dorcet V, Oohora K, Hayashi T, Kitagishi H. Functional Myoglobin Model Composed of a Strapped Porphyrin/Cyclodextrin Supramolecular Complex with an Overhanging COOH That Increases O 2/CO Binding Selectivity in Aqueous Solution. Inorg Chem 2021; 60:12392-12404. [PMID: 34319113 DOI: 10.1021/acs.inorgchem.1c01628] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A water-soluble strapped iron(III)tetraarylporphyrin (FeIIIPor-1) bearing two propylpyridinium groups at the side chains and a carboxylic acid group at the overhanging position of the strap was synthesized to mimic the function of myoglobin with the distal polar functionality in aqueous solution. FeIIIPor-1 forms a stable 1:1 inclusion complex with a per-O-methylated β-cyclodextrin dimer having a pyridine linker (Py3OCD), providing a hydrophobic environment and a proximal fifth ligand to stabilize the O2-complex. The ferrous complex (FeIIPorCD-1) binds both O2 and CO in aqueous solution. The O2 and CO binding affinities (P1/2O2 and P1/2CO) and half-life time (t1/2) of the O2 complex of FeIIPorCD-1 are 6.3 and 0.021 Torr, and 7 h, respectively, at pH 7 and 25 °C. The control compound without the strap structure (FeIIPorCD-2) has similar oxygen binding characteristics (P1/2O2 = 8.0 Torr), but much higher CO binding affinity (P1/2CO = 3.8 × 10-4 Torr), and longer t1/2 (30 h). The O2 and CO kinetics indicate that the strapped structure in FeIIPorCD-1 inhibits the entrance of these gaseous ligands into the iron(II) center, as evidenced by lower konO2 and konCO values. Interestingly, the CO complex of FeIIPorCD-1 is significantly destabilized (relatively larger koffCO), while the koffO2 value is much smaller than that of FeIIPorCD-2, resulting in significantly increased O2/CO selectivity (reduced M value, where M = P1/2O2/P1/2CO = 320) in FeIIPorCD-1 compared to FeIIPorCD-2 (M = 21000).
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Affiliation(s)
- Qiyue Mao
- Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe-city, Kyoto 610-0321, Japan
| | - Pradip K Das
- Institut des Sciences Chimiques de Rennes, Université Rennes, CNRS, UMR 6226, Rennes F-35000, France
| | - Stéphane Le Gac
- Institut des Sciences Chimiques de Rennes, Université Rennes, CNRS, UMR 6226, Rennes F-35000, France
| | - Bernard Boitrel
- Institut des Sciences Chimiques de Rennes, Université Rennes, CNRS, UMR 6226, Rennes F-35000, France
| | - Vincent Dorcet
- Institut des Sciences Chimiques de Rennes, Université Rennes, CNRS, UMR 6226, Rennes F-35000, France
| | - Koji Oohora
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Japan
| | - Takashi Hayashi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Japan
| | - Hiroaki Kitagishi
- Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe-city, Kyoto 610-0321, Japan
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3
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Mao Q, Kawaguchi AT, Mizobata S, Motterlini R, Foresti R, Kitagishi H. Sensitive quantification of carbon monoxide in vivo reveals a protective role of circulating hemoglobin in CO intoxication. Commun Biol 2021; 4:425. [PMID: 33782534 PMCID: PMC8007703 DOI: 10.1038/s42003-021-01880-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 02/17/2021] [Indexed: 12/14/2022] Open
Abstract
Carbon monoxide (CO) is a gaseous molecule known as the silent killer. It is widely believed that an increase in blood carboxyhemoglobin (CO-Hb) is the best biomarker to define CO intoxication, while the fact that CO accumulation in tissues is the most likely direct cause of mortality is less investigated. There is no reliable method other than gas chromatography to accurately determine CO content in tissues. Here we report the properties and usage of hemoCD1, a synthetic supramolecular compound composed of an iron(II)porphyrin and a cyclodextrin dimer, as an accessible reagent for a simple colorimetric assay to quantify CO in biological samples. The assay was validated in various organ tissues collected from rats under normal conditions and after exposure to CO. The kinetic profile of CO in blood and tissues after CO treatment suggested that CO accumulation in tissues is prevented by circulating Hb, revealing a protective role of Hb in CO intoxication. Furthermore, hemoCD1 was used in vivo as a CO removal agent, showing that it acts as an effective adjuvant to O2 ventilation to eliminate residual CO accumulated in organs, including the brain. These findings open new therapeutic perspectives to counteract the toxicity associated with CO poisoning. Mao et al. report highly sensitive quantification of carbon monoxide with a simple colorimetric assay, exploiting a synthetic supramolecular compound, hemoCD1. It can reveal distribution of CO in organs including the brain and can also serve as a CO scavenger for residual CO accumulated in organs. Finally, the authors showed circulating hemoglobin plays a protective role in CO intoxication.
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Affiliation(s)
- Qiyue Mao
- Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe, Kyoto, Japan
| | - Akira T Kawaguchi
- Cell Transplantation and Regenerative Medicine, Tokai University, Isehara, Kanagawa, Japan
| | - Shun Mizobata
- Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe, Kyoto, Japan
| | | | - Roberta Foresti
- University Paris Est Creteil, INSERM, IMRB, Creteil, France.
| | - Hiroaki Kitagishi
- Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe, Kyoto, Japan.
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4
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Watanabe M, Kanai Y, Nakamura S, Nishimura R, Shibata T, Momotake A, Yanagisawa S, Ogura T, Matsuo T, Hirota S, Neya S, Suzuki A, Yamamoto Y. Synergistic Effect of Distal Polar Interactions in Myoglobin and Their Structural Consequences. Inorg Chem 2018; 57:14269-14279. [DOI: 10.1021/acs.inorgchem.8b02302] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | | | | | - Sachiko Yanagisawa
- Department of Life Science, Graduate School of Life Science, University of Hyogo,
Sayo-cho, Sayo-gun, Hyogo 678-1297, Japan
| | - Takashi Ogura
- Department of Life Science, Graduate School of Life Science, University of Hyogo,
Sayo-cho, Sayo-gun, Hyogo 678-1297, Japan
| | - Takashi Matsuo
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
| | - Shun Hirota
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
| | - Saburo Neya
- Department of Physical Chemistry, Graduate School of Pharmaceutical Sciences, Chiba University, Chuoh-Inohana, Chiba 260-8675, Japan
| | - Akihiro Suzuki
- Department of Materials Engineering, National Institute of Technology, Nagaoka College, Nagaoka 940-8532, Japan
| | - Yasuhiko Yamamoto
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance, University of Tsukuba, Tsukuba 305-8577, Japan
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5
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Baglia RA, Zaragoza JPT, Goldberg DP. Biomimetic Reactivity of Oxygen-Derived Manganese and Iron Porphyrinoid Complexes. Chem Rev 2017; 117:13320-13352. [PMID: 28991451 PMCID: PMC6058703 DOI: 10.1021/acs.chemrev.7b00180] [Citation(s) in RCA: 204] [Impact Index Per Article: 29.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Heme proteins utilize the heme cofactor, an iron porphyrin, to perform a diverse range of reactions including dioxygen binding and transport, electron transfer, and oxidation/oxygenations. These reactions share several key metalloporphyrin intermediates, typically derived from dioxygen and its congeners such as hydrogen peroxide. These species are composed of metal-dioxygen, metal-superoxo, metal-peroxo, and metal-oxo adducts. A wide variety of synthetic metalloporphyrinoid complexes have been synthesized to generate and stabilize these intermediates. These complexes have been studied to determine the spectroscopic features, structures, and reactivities of such species in controlled and well-defined environments. In this Review, we summarize recent findings on the reactivity of these species with common porphyrinoid scaffolds employed for biomimetic studies. The proposed mechanisms of action are emphasized. This Review is organized by structural type of metal-oxygen intermediate and broken into subsections based on the metal (manganese and iron) and porphyrinoid ligand (porphyrin, corrole, and corrolazine).
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Affiliation(s)
- Regina A. Baglia
- Department of Chemistry, The Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Jan Paulo T. Zaragoza
- Department of Chemistry, The Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - David P. Goldberg
- Department of Chemistry, The Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
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6
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Vashishat R, Chabba S, Mahajan RK. Surface active ionic liquid induced conformational transition in aqueous medium of hemoglobin. RSC Adv 2017. [DOI: 10.1039/c7ra00075h] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The molecular interactions and effect of SAILs on the conformation of human hemoglobin (Hb) has been studied using various techniques.
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Affiliation(s)
- Rajni Vashishat
- Department of Chemistry
- UGC-Centre for Advanced Studies
- Guru Nanak Dev University
- Amritsar-143005
- India
| | - Shruti Chabba
- Department of Chemistry
- UGC-Centre for Advanced Studies
- Guru Nanak Dev University
- Amritsar-143005
- India
| | - Rakesh Kumar Mahajan
- Department of Chemistry
- UGC-Centre for Advanced Studies
- Guru Nanak Dev University
- Amritsar-143005
- India
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7
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Kanai Y, Nishimura R, Nishiyama K, Shibata T, Yanagisawa S, Ogura T, Matsuo T, Hirota S, Neya S, Suzuki A, Yamamoto Y. Effects of Heme Electronic Structure and Distal Polar Interaction on Functional and Vibrational Properties of Myoglobin. Inorg Chem 2016; 55:1613-22. [DOI: 10.1021/acs.inorgchem.5b02520] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuki Kanai
- Department of Chemistry, University of Tsukuba, Tsukuba 305-8571, Japan
| | - Ryu Nishimura
- Department of Chemistry, University of Tsukuba, Tsukuba 305-8571, Japan
| | - Kotaro Nishiyama
- Department of Chemistry, University of Tsukuba, Tsukuba 305-8571, Japan
| | - Tomokazu Shibata
- Department of Chemistry, University of Tsukuba, Tsukuba 305-8571, Japan
| | - Sachiko Yanagisawa
- Department of Life
Science, Graduate School of Life Science, University of Hyogo, RSC-UH Leading Program Center, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Takashi Ogura
- Department of Life
Science, Graduate School of Life Science, University of Hyogo, RSC-UH Leading Program Center, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Takashi Matsuo
- Graduate School of
Materials Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
| | - Shun Hirota
- Graduate School of
Materials Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
| | - Saburo Neya
- Department of Physical Chemistry, Graduate School of Pharmaceutical
Sciences, Chiba University, Chuoh-Inohana, Chiba 260-8675, Japan
| | - Akihiro Suzuki
- Department
of Materials Engineering, Nagaoka National College of Technology, Nagaoka 940-8532, Japan
| | - Yasuhiko Yamamoto
- Department of Chemistry, University of Tsukuba, Tsukuba 305-8571, Japan
- Life Science
Center of Tsukuba Advanced Research Alliance, University of Tsukuba, Tsukuba 305-8577, Japan
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8
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Nishimura R, Shibata T, Tai H, Ishigami I, Ogura T, Nagao S, Matsuo T, Hirota S, Imai K, Neya S, Suzuki A, Yamamoto Y. Relationship between the Electron Density of the Heme Fe Atom and the Vibrational Frequencies of the Fe-Bound Carbon Monoxide in Myoglobin. Inorg Chem 2013; 52:3349-55. [DOI: 10.1021/ic3028447] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ryu Nishimura
- Department of Chemistry, University of Tsukuba, Tsukuba 305-8571, Japan
| | - Tomokazu Shibata
- Department of Chemistry, University of Tsukuba, Tsukuba 305-8571, Japan
| | - Hulin Tai
- Department of Chemistry, University of Tsukuba, Tsukuba 305-8571, Japan
| | - Izumi Ishigami
- Department of Life Science, Graduate School
of Life Science, University of Hyogo, Kamigori-cho,
Ako-gun, Hyogo 678-1297, Japan
| | - Takashi Ogura
- Department of Life Science, Graduate School
of Life Science, University of Hyogo, Kamigori-cho,
Ako-gun, Hyogo 678-1297, Japan
| | - Satoshi Nagao
- Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
| | - Takashi Matsuo
- Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
| | - Shun Hirota
- Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
| | - Kiyohiro Imai
- Department of Frontier Bioscience,
Faculty of Bioscience and Applied Chemistry, Hosei University, Koganei, Tokyo 184-8584, Japan
| | - Saburo Neya
- Department of Physical Chemistry, Graduate School of Pharmaceutical
Sciences, Chiba University, Chuoh-Inohana,
Chiba 260-8675, Japan
| | - Akihiro Suzuki
- Department
of Materials Engineering, Nagaoka National College of Technology, Nagaoka 940-8532, Japan
| | - Yasuhiko Yamamoto
- Department of Chemistry, University of Tsukuba, Tsukuba 305-8571, Japan
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9
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Shibata T, Matsumoto D, Nishimura R, Tai H, Matsuoka A, Nagao S, Matsuo T, Hirota S, Imai K, Neya S, Suzuki A, Yamamoto Y. Relationship between oxygen affinity and autoxidation of myoglobin. Inorg Chem 2012; 51:11955-60. [PMID: 23082875 DOI: 10.1021/ic301848t] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Studies using myoglobins reconstituted with a variety of chemically modified heme cofactors revealed that the oxygen affinity and autoxidation reaction rate of the proteins are highly correlated to each other, both decreasing with decreasing the electron density of the heme iron atom. An Fe(3+)-O(2)(-)-like species has been expected for the Fe(2+)-O(2) bond in the protein, and the electron density of the heme iron atom influences the resonance process between the two forms. A shift of the resonance toward the Fe(2+)-O(2) form results in lowering of the O(2) affinity due to an increase in the O(2) dissociation rate. On the other hand, a shift of the resonance toward the Fe(3+)-O(2)(-)-like species results in acceleration of the autoxidation through increasing H(+) affinity of the bound ligand.
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Affiliation(s)
- Tomokazu Shibata
- Department of Chemistry, University of Tsukuba, Tsukuba 305-8571, Japan
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10
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Moreira LM, Poli AL, Lyon JP, Aimbire F, Toledo JC, Costa-Filho AJ, Imasato H. Ligand changes in ferric species of the giant extracellular hemoglobin of Glossoscolex paulistusas function of pH: correlations between redox, spectroscopic and oligomeric properties and general implications with different hemoproteins. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s108842461000201x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The present review is focused on the relationship between oligomeric and heme properties of HbGp, emphasizing the characteristics that can be generalized to other hemoproteins. This study represents the state-of-the-art with respect to the approaches for investigating giant extracellular hemoglobins as well as the correlation between oligomeric assembly alterations and their consequent changes in the first coordination sphere. A wide introduction focused on the properties of this hemoglobin is developed. Indeed, this hemoprotein is considered an interesting prototype of blood substitute and biosensor due to its peculiar properties, such as resistance to autoxidation and oligomeric stability. Previous studies by our group employing UV-vis, EPR and CD spectroscopies have been revised in a complete approach, in agreement with recent and relevant data from the literature. In fact, a consistent and inter-related spectroscopic study is described propitiating a wide assignment of "fingerprint" peaks found in the techniques evaluated in this paper. This review furnishes physicochemical information regarding the identification of ferric heme species of hemoproteins and metallic complexes through their spectroscopic bands. This effort at the attribution of UV-vis, EPR and CD peaks is not restricted to HbGp, and includes a comparative analysis of several hemoproteins involving relevant implications regarding several types of iron-porphyrin systems.
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Affiliation(s)
- Leonardo Marmo Moreira
- Instituto de Pesquisa e Desenvolvimento, Universidade do Vale do Paraíba, 12244-000 São José dos Campos SP, Brazil
- Instituto de Química de São Carlos, Universidade de São Paulo, 13560-970 São Carlos SP, Brazil
- Instituto de Pesquisa e Qualidade Acadêmica (IPQA), Universidade Camilo Castelo Branco, São José dos Campos SP, Brazil
| | - Alessandra Lima Poli
- Instituto de Química de São Carlos, Universidade de São Paulo, 13560-970 São Carlos SP, Brazil
| | - Juliana Pereira Lyon
- Instituto de Pesquisa e Desenvolvimento, Universidade do Vale do Paraíba, 12244-000 São José dos Campos SP, Brazil
| | - Flávio Aimbire
- Instituto de Pesquisa e Desenvolvimento, Universidade do Vale do Paraíba, 12244-000 São José dos Campos SP, Brazil
- Instituto de Pesquisa e Qualidade Acadêmica (IPQA), Universidade Camilo Castelo Branco, São José dos Campos SP, Brazil
| | | | | | - Hidetake Imasato
- Instituto de Química de São Carlos, Universidade de São Paulo, 13560-970 São Carlos SP, Brazil
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11
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New Roles Assigned to the α1–β1 (and α2–β2) Interface of the Human Hemoglobin Molecule from Physiological to Cellular. APPLIED SCIENCES-BASEL 2011. [DOI: 10.3390/app1010013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Karasugi K, Kitagishi H, Kano K. Gold Nanoparticles Carrying Diatomic Molecules (O2 and CO) in Aqueous Solution. Chem Asian J 2011; 6:825-33. [DOI: 10.1002/asia.201000756] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2010] [Indexed: 01/20/2023]
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13
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Sugawara Y, Hayashi Y, Shigemasa Y, Abe Y, Ohgushi I, Ueno E, Shimamoto F. Molecular biosensing mechanisms in the spleen for the removal of aged and damaged red cells from the blood circulation. SENSORS 2010; 10:7099-121. [PMID: 22163593 PMCID: PMC3231191 DOI: 10.3390/s100807099] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2010] [Revised: 06/25/2010] [Accepted: 07/10/2010] [Indexed: 12/01/2022]
Abstract
Heinz bodies are intraerythrocytic inclusions of hemichrome formed as a result of hemoglobin (Hb) oxidation. They typically develop in aged red cells. Based on the hypothesis that hemichrome formation is an innate characteristic of physiologically normal Hb molecules, we present an overview of our previous findings regarding the molecular instability of Hb and the formation of hemichrome, as well as recent findings on Heinz body formation within normal human erythrocytes. Human adult Hb (HbO2 A) prepared from healthy donors showed a tendency to produce hemichrome, even at close to physiological temperature and pH. Recent studies found that the number of Heinz bodies formed in red cells increased with increasing temperature when freshly drawn venous blood from healthy donors was subjected to mild heating above 37 °C. These findings suggest that Hb molecules control the removal of non-functional erythrocytes from the circulation via hemichrome formation and subsequent Heinz body clustering. In this review, we discuss the molecular biosensing mechanisms in the spleen, where hemichrome formation and subsequent Heinz body clustering within erythrocytes play a key role in the removal of aged and damaged red cells from the blood circulation.
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Affiliation(s)
- Yoshiaki Sugawara
- Department of Health Science, Prefectural University of Hiroshima, Hiroshima 734-8558, Japan.
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14
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Shikama K, Matsuoka A. Structure-Function Relationships in Unusual Nonvertebrate Globins. Crit Rev Biochem Mol Biol 2010; 39:217-59. [PMID: 15596552 DOI: 10.1080/10409230490514008] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Based on the literature and our own results, this review summarizes the most recent state of nonvertebrate myoglobin (Mb) and hemoglobin (Hb) research, not as a general survey of the subject but as a case study. For this purpose, we have selected here four typical globins to discuss their unique structures and properties in detail. These include Aplysia myoglobin, which served as a prototype for the unusual globins lacking the distal histidine residue; midge larval hemoglobin showing a high degree of polymorphism; Tetrahymena hemoglobin evolved with a truncated structure; and yeast flavohemoglobin carrying an enigmatic two-domain structure. These proteins are not grouped by any common features other than the fact they have globin domains and heme groups. As a matter of course, various biochemical functions other than the conventional oxygen transport or storage have been proposed so far to these primitive or ancient hemoglobins or myoglobins, but the precise in vivo activity is still unclear. In this review, special emphasis is placed on the stability properties of the heme-bound O2. Whatever the possible roles of nonvertebrate myoglobins and hemoglobins may be (or might have been), the binding of molecular oxygen to iron(II) must be the primary event to manifest their physiological functions in vivo. However, the reversible and stable binding of O2 to iron(II) is not a simple process, since the oxygenated form of Mb or Hb is oxidized easily to its ferric met-form with the generation of superoxide anion. The metmyoglobin or methemoglobin thus produced cannot bind molecular oxygen and is therefore physiologically inactive. In this respect, protozoan ciliate myoglobin and yeast flavohemoglobin are of particular interest in their very unique structures. Indeed, both proteins have been found to have completely different strategies for overcoming many difficulties in the reversible and stable binding of molecular oxygen, as opposed to the irreversible oxidation of heme iron(II). Such comparative studies of the stability of MbO2 or HbO2 are of primary importance, not only for a full understanding of the globin evolution, but also for planning new molecular designs for synthetic oxygen carriers that may be able to function in aqueous solution and at physiological temperature.
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Affiliation(s)
- Keiji Shikama
- Biological Institute, Graduate School of Life Sciences, Tohoku University, Sendai, Japan.
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15
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Kano K, Itoh Y, Kitagishi H, Hayashi T, Hirota S. A Supramolecular Receptor of Diatomic Molecules (O2, CO, NO) in Aqueous Solution. J Am Chem Soc 2008; 130:8006-15. [DOI: 10.1021/ja8009583] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Koji Kano
- Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan, Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 562-0014, and Graduate School of Material Sciences, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
| | - Yoshiki Itoh
- Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan, Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 562-0014, and Graduate School of Material Sciences, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
| | - Hiroaki Kitagishi
- Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan, Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 562-0014, and Graduate School of Material Sciences, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
| | - Takashi Hayashi
- Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan, Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 562-0014, and Graduate School of Material Sciences, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
| | - Shun Hirota
- Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan, Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 562-0014, and Graduate School of Material Sciences, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
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16
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Fitzgerald JP, Lebenson JR, Wang G, Yee GT, Noll BC, Sommer RD. Iron Tetraanthracenotetraazaporphyrins: Synthesis, Structural Characterization, Ligand Binding Properties, and Unexpected Selectivity of a Bis-“Bowl” Tetraazaporphyrin. Inorg Chem 2008; 47:4520-30. [DOI: 10.1021/ic702149z] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jeffrey P. Fitzgerald
- Departments of Chemistry, United States Naval Academy, Annapolis, Maryland 21402, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, DePaul University, Chicago, Illinois 60614, and Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - Joshua R. Lebenson
- Departments of Chemistry, United States Naval Academy, Annapolis, Maryland 21402, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, DePaul University, Chicago, Illinois 60614, and Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - Guangbin Wang
- Departments of Chemistry, United States Naval Academy, Annapolis, Maryland 21402, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, DePaul University, Chicago, Illinois 60614, and Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - Gordon T. Yee
- Departments of Chemistry, United States Naval Academy, Annapolis, Maryland 21402, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, DePaul University, Chicago, Illinois 60614, and Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - Bruce C. Noll
- Departments of Chemistry, United States Naval Academy, Annapolis, Maryland 21402, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, DePaul University, Chicago, Illinois 60614, and Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - Roger D. Sommer
- Departments of Chemistry, United States Naval Academy, Annapolis, Maryland 21402, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, DePaul University, Chicago, Illinois 60614, and Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
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17
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Xie X, He X, Song Z. A sensitive chemiluminescence procedure for the determination of carbon monoxide with myoglobin-luminol chemiluminescence system. APPLIED SPECTROSCOPY 2007; 61:706-10. [PMID: 17697464 DOI: 10.1366/000370207781393398] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
A novel chemiluminescence method combined with the flow injection technique for the determination of carbon monoxide is presented in this paper. The chemiluminescence signal based on the reaction between myoglobin and luminol in an alkaline medium was remarkably enhanced by carbon monoxide. The enhanced chemiluminescence intensity was linear with carbon monoxide concentration in the range from 0.01 to 10.0 pmol.L(-1), and the detection limit was 3x10(-3) pmol.L(-1) (3sigma). The whole process, including sampling and washing, could be completed in 0.5 min with a relative standard deviation of less than 4.0%. The proposed method was applied successfully in the assay of carbon monoxide in human serum and artificial water samples without any pretreatment procedure.
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Affiliation(s)
- Xiaofeng Xie
- Department of Chemistry, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, Northwest University, Xi'an, 710069, China
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18
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Kano K, Kitagishi H, Dagallier C, Kodera M, Matsuo T, Hayashi T, Hisaeda Y, Hirota S. Iron porphyrin-cyclodextrin supramolecular complex as a functional model of myoglobin in aqueous solution. Inorg Chem 2007; 45:4448-60. [PMID: 16711695 DOI: 10.1021/ic060137b] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The 1:1 inclusion complex of 5,10,15,20-tetrakis(4-sulfonatophenyl)porphinato iron(II) (Fe(II)TPPS) and an O-methylated beta-cyclodextrin dimer having a pyridine linker (1) binds dioxygen reversibly in aqueous solution. The O2 adduct was very stable (t(1/2) = 30.1 h) at pH 7.0 and 25 degrees C. ESI-MS and NMR spectroscopic measurements and molecular mechanics (MM) calculations indicated the inclusion of the sulfonatophenyl groups at the 5- and 15-positions of Fe(III)TPPS or Fe(II)TPPS into two cyclodextrin moieties of 1 to form a supramolecular 1:1 complex (hemoCD1 for the Fe(II)TPPS complex), whose iron center is completely covered by two cyclodextrin moieties. Equilibrium measurements and laser flash photolysis provided the affinities ( and ) and rate constants for O2 and CO binding of hemoCD1 (k(O2)(on), k(O2)(off), k(CO)(on), and k(CO)(off)). The CO affinity relative to the O2 affinity of hemoCD1 was abnormally high. Although resonance Raman spectra suggested weak back-bonding of d(pi)(Fe) --> pi(CO) and hence a weak CO-Fe bond, the CO adduct of hemoCD1 was very stable. The hydrophobic CO molecule dissociated from CO-hemoCD1 hardly breaks free from a shallow cleft in hemoCD1 surrounded by an aqueous bulk phase leading to fast rebinding of CO to hemoCD1. Isothermal titration calorimetry furnished the association constant (K(O2)), DeltaH degrees , and DeltaS degrees for O2 association to be (2.71 +/- 0.51) x 10(4) M(-1), -65.2 +/- 4.4 kJ mol(-1), and -133.9 +/- 16.1 J mol(-1) K(-1), respectively. The autoxidation of oxy-hemoCD1 was accelerated by H+ and OH-. The inorganic anions also accelerated the autoxidation of oxy-hemoCD1. The O2-Fe(II) bond is equivalent to the O2.--Fe(III) bond, which is attacked by the inorganic anions or the water molecule to produce met-hemoCD1 and a superoxide anion.
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Affiliation(s)
- Koji Kano
- Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan. kkano@ mail.doshisha.ac.jp
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19
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Korendovych IV, Kryatova OP, Reiff WM, Rybak-Akimova EV. Iron(II) Complexes with Amide-Containing Macrocycles as Non-Heme Porphyrin Analogues. Inorg Chem 2007; 46:4197-211. [PMID: 17419619 DOI: 10.1021/ic0701209] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Iron(II) complexes of macrocyclic pentadendate ligands 3,6,9,12,18-pentaazabicyclo[12.3.1]octadeca-1(18),14,16-triene-2,13-dione (H2pydioneN5) and 16-chloro-3,6,9,12,18-pentaazabicyclo[12.3.1]octadeca-1(18),14,16-triene-2,13-dione (H2pyCldioneN5) were synthesized and fully characterized. Complexes with one or two deprotonated amide groups of H2pydione were both isolated. In the former case the metal ion has a distorted octahedral coordination sphere; in the latter case the complex adopts a pentagonal-bipyramidal geometry. NMR experiments show that the protonation state of the ligand is preserved in a dimethyl sulfoxide (DMSO) solution. The complexes maintain a high-spin state even at low temperatures. Detailed kinetic studies of oxygenation of the iron(II) complexes showed that the deprotonation state of the complex has a profound effect on the reactivity with dioxygen. Oxygenation of the dideprotonated complex of iron(II), Fe(pydioneN5), in aprotic solvents proceeds via a path that is analogous to that of iron(II) porphyrins: via iron(III) superoxo and diiron(III) peroxo species, as evidenced by the spectral changes during the reaction, which is second-order in the concentration of the iron(II) complex, and with an inverse dependence of the reaction rate on the concentration of dioxygen. The final products of oxygenation are crystallographically characterized iron(III) mu-oxo dimers. We have also found that the presence of 1-methylimidazole stabilizes the diiron peroxo intermediate. The reaction of Fe(pydioneN5) with dioxygen in methanol is distinctly different under the same conditions. The reaction is first-order in both iron(II) complex and dioxygen, and no intermediate is spectroscopically observed. Similar behavior was observed for the monodeprotonated complex Fe(HpydioneN5)(Cl). The presence of an accessible proton either from the solvent (reactions in methanol) or from the complex itself (in Fe(HpydioneN5)(Cl)) proves sufficient to alter the oxygenation pathway in these macrocyclic systems, which is reminiscent of the properties of iron(II) porphyrin complexes. The new amidopyridine macrocycles can be considered as new members of the "expanded porphyrin analogue" family. The expansion of the cavity provides control over the spin state and availability of protons. These macrocyclic systems also allow for easy synthetic modifications, paving the way to new, versatile metal complexes.
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Affiliation(s)
- Ivan V Korendovych
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, USA
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20
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Momenteau M. Models of Hemoprotein Active Sites. PERSPECTIVES IN SUPRAMOLECULAR CHEMISTRY 2007. [DOI: 10.1002/9780470511473.ch4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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21
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Huszánk R, Lendvay G, Horváth O. Air-stable, heme-like water-soluble iron(II) porphyrin: in situ preparation and characterization. J Biol Inorg Chem 2007; 12:681-90. [PMID: 17333300 DOI: 10.1007/s00775-007-0217-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2006] [Accepted: 01/29/2007] [Indexed: 10/23/2022]
Abstract
Preparation of the water-soluble, kinetically labile, high-spin iron(II) tetrakis(4-sulfonatophenyl)porphyrin, Fe(II)TPPS(4-), has been realized in neutral or weakly acidic solutions containing acetate buffer. The buffer played a double role in these systems: it was used for both adjusting pH and, via formation of an acetato complex, trapping trace amounts of iron(III) ions, which would convert the iron(II) porphyrins to the corresponding iron(III) species. Fe(II)TPPS(4-) proved to be stable in these solutions even after saturation with air or oxygen. In the absence of acetate ions, however, iron(II) ions play a catalytic role in the formation of iron(III) porphyrins. While the kinetically inert iron(III) porphyrin, Fe(III)TPPS(3-), is a regular one with no emission and photoredox properties, the corresponding iron(II) porphyrin displays photoinduced features which are typical of sitting-atop complexes (redshifted Soret absorption and blueshifted emission and Q absorption bands, photoinduced porphyrin ligand-to-metal charge transfer, LMCT, reaction). In the photolysis of Fe(II)TPPS(4-) the LMCT process is followed by detachment of the reduced metal center and an irreversible ring-opening of the porphyrin ligand, resulting in the degradation of the complex. Possible oxygen-binding ability of Fe(II)TPPS(4-) (as a heme model) has been studied as well. Density functional theory calculations revealed that in solutions with high acetate concentration there is very little chance for iron(II) porpyrin to bind and release O(2), deviating from heme in a hydrophobic microenvironment in hemoglobin. In the presence of an iron(III)-trapping additive that is much less strongly coordinated to the iron(II) center than the acetate ion, Fe(II)TPPS(4-) may function as a heme model.
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Affiliation(s)
- Róbert Huszánk
- Department of General and Inorganic Chemistry, University of Pannonia, P.O. Box 158, Veszprém 8201, Hungary
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23
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Kano K, Kitagishi H, Mabuchi T, Kodera M, Hirota S. A Myoglobin Functional Model Composed of a Ferrous Porphyrin and a Cyclodextrin Dimer with an Imidazole Linker. Chem Asian J 2006; 1:358-66. [PMID: 17441072 DOI: 10.1002/asia.200600070] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A 1:1 inclusion complex (Fe(II)PImCD) of 5,10,15,20-tetrakis- (4-sulfonatophenyl)porphinatoiron(II) (Fe(II)P) and an O-methylated beta-cyclodextrin dimer with an imidazole linker (ImCD) was found to bind dioxygen in aqueous solution. The half-saturation pressure of dioxygen (P(1/2)O2) is 1.7 torr at 25 degrees C, which is 10 times lower than that for a previous myoglobin functional model (hemoCD) with a pyridine linker. Meanwhile, the half-life of oxygenated Fe(II)PImCD is 3 h, which is 10 times shorter than that of oxygenated hemoCD. The covering of the iron(II) center by a microscopic environment is essential for preventing autoxidation of oxygenated ferrous porphyrin, which is promoted by nucleophilic attack of H2O and/or nucleophiles such as inorganic anions. Due to structural requirements, covering of the Fe(II) center of Fe(II)PImCD is insufficient compared with the case of hemoCD. As a result, water molecules can penetrate more easily the cleft of the O2-Fe(II)PImCD complex and act as an autoxidation inducer. This structure also causes poorer selectivity against carbon monoxide (M = 1040). In contrast, the dioxygen affinity of Fe(II)PImCD is much higher than that of hemoCD because the imidazole moiety is a stronger electron donor than pyridine.
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Affiliation(s)
- Koji Kano
- Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan.
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24
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Shikama K. Nature of the FeO2 bonding in myoglobin and hemoglobin: A new molecular paradigm. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2005; 91:83-162. [PMID: 16005052 DOI: 10.1016/j.pbiomolbio.2005.04.001] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The iron(II)-dioxygen bond in myoglobin and hemoglobin is a subject of wide interest. Studies range from examinations of physical-chemical properties dependent on its electronic structure, to investigations of the stability as a function of oxygen supply. Among these, stability properties are of particular importance in vivo. Like all known dioxygen carriers synthesized so far with transition metals, the oxygenated forms of myoglobin and hemoglobin are known to be oxidized easily to their ferric met-forms, which cannot bind molecular oxygen and are therefore physiologically inactive. The mechanistic details of this autoxidation reaction, which are of clinical, as well as of physical-chemical, interest, have long been investigated by a number of authors, but a full understanding of the heme oxidation has not been reached so far. Recent kinetic and thermodynamic studies of the stability of oxymyoglobin (MbO2) and oxyhemoglobin (HbO2) have revealed new features in the FeO2 bonding. In vivo, the iron center is always subject to a nucleophilic attack of the water molecule or hydroxyl ion, which can enter the heme pocket from the surrounding solvent and thereby irreversibly displace the bound dioxygen from MbO2 or HbO2 in the form of O2- so that the iron is converted to the ferric met-form. Since the autoxidation reaction of MbO2 or HbO2 proceeds through a nucleophilic displacement following one-electron transfer from iron(II) to the bound O2, this reaction may be viewed as a meeting point of the stabilization and the activation of molecular oxygen performed by hemoproteins. Along with these lines of evidence, we finally discuss the stability property of human HbO2 and provide with the most recent state of hemoglobin research. The HbA molecule contains two types of alphabeta contacts and seems to differentiate them quite properly for its functional properties. The alpha1beta2 or alpha2beta1 contact is associated with the cooperative oxygen binding, whereas the alpha1beta1 or alpha2beta2 contact is used for controlling the stability of the bound O2. We can thus form a unified picture for hemoglobin function by closely integrating the cooperative and the stable binding of molecular oxygen with iron(II) in aqueous solvent. These new views on the nature of FeO2 bonding and the possible role of globin moiety in stabilizing MbO2 and HbO2 are of primary importance, not only for a full understanding of various hemoprotein reactions with O2, but also for planning new molecular designs for synthetic oxygen carriers which may be able to function in aqueous solvent and at physiological temperature.
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Affiliation(s)
- Keiji Shikama
- Biological Institute, Graduate School of Life Sciences, Tohoku University, Sendai, Japan.
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25
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Poli AL, Moreira LM, Hidalgo AA, Imasato H. Autoxidation studies of extracellular hemoglobin of Glossoscolex paulistus at pH 9: cyanide and hydroxyl effect. Biophys Chem 2005; 114:253-60. [PMID: 15829360 DOI: 10.1016/j.bpc.2004.12.041] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2004] [Revised: 12/15/2004] [Accepted: 12/17/2004] [Indexed: 10/25/2022]
Abstract
The complex oligomeric assembly of the hemoglobin subunits may influence the autoxidation rate. To understand this relation, the rate of autoxidation was studied at pH 9.0, where the Glossoscolex paulistus Hemoglobin (GpHb) dissociates. At alkaline pH, this hemoglobin is dissociated into monomers, trimers and tetramers, allowing the study of the integral protein and monomer subunit autoxidation on independent experiments. The autoxidation rate was evaluated in the presence and absence of cyanide (CN(-)), a strong field ligand to the ferric ion. The oxidation kinetic was monitored using the UV-vis absorption at 415 nm, and resulted in: i) bi-exponential kinetics for the whole hemoglobin (indicating a fast and a slow oxidative process) and ii) mono-exponential for the monomer (indicating a single process). To understand the specific characteristics of each autoxidation process, Arrhenius plots allowed the determination of the activation energy. The experimental results indicate for the whole hemoglobin in the absence of CN(-) an activation energy of 150 +/- 10 kJ mol(-1) for the fast and the slow processes. Under the same conditions the monomer displayed an activation energy of 160 +/- 10 kJ mol(-1), very close to the value obtained for the integral protein. The pseudo-second order rate constant for the whole protein autoxidation by CN(-) showed two different behaviors characterized by a rate constant k(CN1)' = 0.11 +/- 0.02 s(-1) mol(-1) L for CN(-) concentrations lower than 0.012 mol L(-1); and k(CN1)" = 0.76 +/- 0.04 s(-1) mol(-1) L at higher concentrations for the fast process, while the slow process remain constant with k(CN2) = 0.033 +/- 0.002 s(-1) mol(-1) L. The monomer has a characteristic rate constant of 0.041 +/- 0.002 s(-1) mol(-1) L for all cyanide concentrations. Comparing the results for the slow process of the whole hemoglobin and the oxidation of the monomer, it is possible to infer that the slow process has a strong contribution of the monomer in the whole hemoglobin kinetic. Moreover, as disulfide linkers sustain the trimer assembly, cooperativity may explain the higher kinetic constant for this subunit.
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Huszánk R, Horváth O. A heme-like, water-soluble iron(II) porphyrin: thermal and photoinduced properties, evidence for sitting-atop structure. Chem Commun (Camb) 2004:224-6. [PMID: 15724193 DOI: 10.1039/b414673e] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Water-soluble ferrous porphyrin (Fe(II)TPPS) was prepared by complexation reaction of free base porphyrin (H2TPPS) with iron(II) ions in the presence of iron(III)-trapping acetate buffer; the catalytic and photoinduced properties of this air-stable complex proved unambiguously its sitting-atop structure.
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Affiliation(s)
- Róbert Huszánk
- University of Veszprém, Department of General and Inorganic Chemistry, H-8200 Veszprém, P.O. Box 158, Hungary
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27
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ASHIDA S, NOGUCHI SF, SATO R. Development of a Spectrophotometric Assay System for Evaluating Reducibility of Water-Soluble Substances. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2004. [DOI: 10.3136/fstr.10.432] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Shikama K, Matsuoka A. Human haemoglobin: a new paradigm for oxygen binding involving two types of alphabeta contacts. ACTA ACUST UNITED AC 2003; 270:4041-51. [PMID: 14519115 DOI: 10.1046/j.1432-1033.2003.03791.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
This review summarizes the most recent state of haemoglobin (Hb) research based on the literature and our own results. In particular, an attempt is made to form a unified picture for haemoglobin function by reconciling the cooperative oxygen binding with the stabilization of the bound dioxygen in aqueous solvent. The HbA molecule contains two types of alphabeta contacts. One type is the alpha1beta2 or alpha2beta1 contacts, called sliding contacts, and these are strongly associated with the cooperative binding of O2 to the alpha2beta2 tetramer. The other type is the alpha1beta1 or alpha2beta2 contacts, called packing contacts, but whose role in Hb function was not clear until quite recently. However, detailed pH-dependence studies of the autoxidation rate of HbO2 have revealed that the alpha1beta1 and alpha2beta2 interfaces are used for controlling the stability of the bound O2. When the alpha1beta1 or alpha2beta2 contact is formed, the beta chain is subjected to a conformational constraint which causes the distal (E7) histidine to be tilted slightly away from the bound dioxygen, preventing the proton-catalysed nucleophilic displacement of O2- from the FeO2 by an entering water molecule. This is one of the most characteristic features of HbO2 stability. Finally we discuss the role of the alpha1beta1 or alpha2beta2 contacts by providing some examples of unstable haemoglobin mutants. These pathological mutations are found mostly on the beta chain, especially in the alpha1beta1 contact regions. In this way, HbA seems to differentiate two types of alphabeta contacts for its functional properties.
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Affiliation(s)
- Keiji Shikama
- Biological Institute, Graduate School of Life Sciences, Tohoku University, Sendai, Japan.
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Sugawara Y, Kadono E, Suzuki A, Yukuta Y, Shibasaki Y, Nishimura N, Kameyama Y, Hirota M, Ishida C, Higuchi N, Haramoto K, Sakai Y, Soda H. Hemichrome formation observed in human haemoglobin A under various buffer conditions. ACTA PHYSIOLOGICA SCANDINAVICA 2003; 179:49-59. [PMID: 12940938 DOI: 10.1046/j.1365-201x.2003.01142.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIM To observe hemichrome formation in human haemoglobin A under various buffer conditions. METHOD Hemichrome formation of human oxyhaemoglobin A (HbO2) was studied spectrophotometrically in 0.1 m buffer at various temperatures and pH values. RESULTS Following autoxidation in ferrous HbO2, it was evident that formation of hemichrome, which tends to precipitate, occurred at various stages during the course of the autoxidation reaction namely at initial, intermediate or final stages, depending on temperature and pH of the solution. By varying temperature of the solution from 35 to 55 degrees C and pH from 4.5 to 10.5, it is shown here that HbO2 exhibits high susceptibility for hemichrome formation and its occurrence is a function of pH, temperature and progress of autoxidation of HbO2. Unlike HbO2 and its separated haemoglobin chains, monomeric bovine heart myoglobin (MbO2) did not easily form hemichrome. CONCLUSION These findings provide a clue on the crucial role of haemoglobin molecule for senescent cell recognition or homeostasis in the blood circulation.
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Affiliation(s)
- Y Sugawara
- Department of Health Science, Hiroshima Prefectural Women's University, Health Science, Hiroshima, Japan
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Kamimura S, Matsuoka A, Imai K, Shikama K. The swinging movement of the distal histidine residue and the autoxidation reaction for midge larval hemoglobins. EUROPEAN JOURNAL OF BIOCHEMISTRY 2003; 270:1424-33. [PMID: 12653997 DOI: 10.1046/j.1432-1033.2003.03498.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Some insects have a globin exclusively in their fast-growing larval stage. This is the case in the 4th-instar larva of Tokunagayusurika akamusi, a common midge found in Japan. In the polymorphic hemoglobin comprised of 11 separable components, hemoglobin VII (Ta-VII Hb) was of particular interest. When its ferric met-form was exposed to pH 5.0 from 7.2, the distal histidine was found to swing away from the E7 position. As a result, the iron(III) was converted from a hexacoordinate to a pentacoordinate form by a concomitant loss of the axial water ligand. The corresponding spectral changes in the Soret band were therefore followed by stopped-flow and rapid-scan techniques, and the observed first-order rate constants of k(out) = 25 s(-1) and kin = 128 s(-1) were obtained for the outward and inward movements, respectively, of the distal histidine residue in 0.1 m buffer at 25 degrees C. For O2 affinity, Ta-VII Hb showed a value of P50 = 1.7 Torr at pH 7.4, accompanied with a remarkable Bohr effect (deltaH+ = -0.58) almost equal to that of mammalian hemoglobins. We have also investigated the stability property of Ta-VII HbO2 in terms of the autoxidation rate over a wide range of pH from 4 to 11. The resulting pH-dependence curve was compared with those of another component Ta-V HbO2 and sperm whale MbO2, and described based on a nucleophilic displacement mechanism. In light of the O2 binding affinity, Bohr effect and considerable stability of the bound O2 against acidic autoxidation, we conclude that T. akamusi Hb VII can play an important role in O2 transport and storage as the major component in the larval hemolymph.
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Affiliation(s)
- Satoshi Kamimura
- Biological Institute, Graduate School of Life Sciences, Tohoku University, Sendai, Japan
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Kobayashi G, Nakamura T, Ohmachi H, Matsuoka A, Ochiai T, Shikama K. Yeast flavohemoglobin from Candida norvegensis. Its structural, spectral, and stability properties. J Biol Chem 2002; 277:42540-8. [PMID: 12192008 DOI: 10.1074/jbc.m206529200] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Flavohemoglobin was isolated directly from the yeast Candida norvegensis and studied on its structural, spectral, and stability properties. In Candida flavohemoglobin, the 155 N-terminal residues make a heme-containing domain, while the remaining 234 C-terminal residues serve as a FAD-containing reductase domain. A pair of His-95 and Gln-63 was assigned to the proximal and distal residues, respectively. In purification procedure FAD was partially dissociated on a Butyl-Toyopearl column, so that FAD-lacking flavohemoglobin was also obtainable. In this ferric species, the Soret and charge-transfer bands were all characteristic of a penta-coordinate form. Compared with the recombinant heme domain expressed in Escherichia coli, we have measured the autoxidation rate over a wide pH range. The resulting pH dependence curves were then analyzed in terms of a nucleophilic displacement mechanism. As a result, the heme domain was found to be extremely susceptible to autoxidation, its rate being more than 100 times higher than that of sperm whale MbO2. However, this inherently high oxidation rate was dramatically suppressed in Candida flavohemoglobin to an extent almost comparable to the stability of mammalian myoglobins. These new findings lead us to conclude that Candida flavohemoglobin, differently from bacterial flavohemoglobins, can serve as an oxygen storage protein in aerobic conditions.
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Affiliation(s)
- Gen Kobayashi
- Biological Institute, Graduate School of Life Sciences, Tohoku University, Sendai 980-8578, Japan
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The effect of dodecyl trimethylammonium bromide on the formation of methemoglobins and hemichrome. Colloids Surf B Biointerfaces 2002. [DOI: 10.1016/s0927-7765(02)00003-6] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Yasuda JP, Ichikawa T, Tsuruga M, Matsuoka A, Sugawara Y, Shikama K. The alpha 1 beta 1 contact of human hemoglobin plays a key role in stabilizing the bound dioxygen. EUROPEAN JOURNAL OF BIOCHEMISTRY 2002; 269:202-11. [PMID: 11784314 DOI: 10.1046/j.0014-2956.2002.02635.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
When the alpha and beta chains were separated from human oxyhemoglobin (HbO(2)), each individual chain was oxidized easily to the ferric form, their rates being almost the same with a very strong acid-catalysis. In the HbO(2) tetramer, on the other hand, both chains become considerably resistant to autoxidation over a wide range of pH values (pH 5-11). Moreover, HbA showed a biphasic autoxidation curve containing the two rate constants, i.e. k(f) for the fast oxidation due to the alpha chains, and k(s) for the slow oxidation to the beta chains. The k(f)/k(s) ratio increased from 3.2 at pH 7.5-7.3 at pH 5.8, but became 1 : 1 at pH values higher than 8.5. In the present work, we used the valency hybrid tetramers such as (alpha(3+))2(beta O(2))(2) and (alpha O(2)(2)(beta(3+))(2), and demonstrated that the autoxidation rate of either the alpha or beta chains (when O2- ligated) is independent of the valency state of the corresponding counterpart chains. From these results, we have concluded that the formation of the alpha 1 beta 1 or alpha 2 beta 2 contact suppresses remarkably the autoxidation rate of the beta chain and thus plays a key role in stabilizing the HbO(2) tetramer. Its mechanistic details were also given in terms of a nucleophilic displacement of O(2)(-) from the FeO(2) center, and the emphasis was placed on the proton-catalyzed process performed by the distal histidine residue.
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Affiliation(s)
- Jun pei Yasuda
- Biological Institute, Graduate School of Science, Tohoku University, Sendai, Japan
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Korenaga S, Igarashi J, Matsuoka A, Shikama K. A primitive myoglobin from Tetrahymena pyriformis: its heme environment, autoxidizability, and genomic DNA structure. BIOCHIMICA ET BIOPHYSICA ACTA 2000; 1543:131-45. [PMID: 11087949 DOI: 10.1016/s0167-4838(00)00187-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A myoglobin-like protein isolated from Tetrahymena pyriformis is composed of 121 amino acid residues. This is much smaller than sperm whale myoglobin by 32 residues, suggesting a distinct origin from the common globin gene. We have therefore examined this unique protein for its structural, spectral and stability properties. As a result, the rate of autoxidation of Tetrahymena oxymyoglobin (MbO(2)) was found to be almost comparable to that of sperm whale MbO(2) over a wide range of pH 4-12 in 0.1 M buffer at 25 degrees C. Moreover, both pH profiles exhibited the remarkable proton-assisted process, which can be performed in sperm whale myoglobin by the distal (E7) histidine as its catalytic residue. These kinetic observations are also in full accord with spectral examinations for the presence of a distal histidine in ciliated protozoa myoglobin. At the same time, we have isolated the globin genes both from T. pyriformis and Tetrahymena thermophila, and found that there is no intron in their genomic structures. This is in sharp contrast to previous reports on the homologous globin genes from Paramecium caudatum and Chlamydomonas eugametos. Rather, the Tetrahymena genes seemed to be related to the cyanobacterial globin gene from Nostoc commune. These contracted or truncated globins thus have a marked diversity in the cDNA, protein, and genomic structures.
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Affiliation(s)
- S Korenaga
- Biological Institute, Graduate School of Science, Tohoku Unviersity, Sendai 980-8578, Japan
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Suzuki T, Watanabe YH, Nagasawa M, Matsuoka A, Shikama K. Dual nature of the distal histidine residue in the autoxidation reaction of myoglobin and hemoglobin comparison of the H64 mutants. EUROPEAN JOURNAL OF BIOCHEMISTRY 2000; 267:6166-74. [PMID: 11012669 DOI: 10.1046/j.1432-1327.2000.01685.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The oxygenated form of myoglobin or hemoglobin is oxidized easily to the ferric met-form with generation of the superoxide anion. To make clear the possible role(s) of the distal histidine (H64) residue in the reaction, we have carried out detailed pH-dependence studies of the autoxidation rate, using some typical H64 mutants of sperm whale myoglobin, over the wide range of pH 5-12 in 0.1 M buffer at 25 degrees C. Each mutation caused a dramatic increase in the autoxidation rate with the trend H64V >/= H64G >/= H64L >> H64Q > H64 (wild-type) at pH 7.0, whereas each mutant protein showed a characteristic pH-profile which is essentially different from that of the wild-type or native sperm whale MbO2. In particular, all the mutants have lost the acid-catalyzed process that can play a dominant role in the autoxidation reaction of most mammalian myoglobins or hemoglobins. Kinetic analyses of various types of pH-profiles lead us to conclude that the distal histidine residue can play a dual role in the nucleophilic displacement of O2- from MbO2 or HbO2 in protic, aqueous solution. One is in a proton-relay mechanism via its imidazole ring, and the other is in the maximum protection of the FeO2 center against a water molecule or an hydroxyl ion that can enter the heme pocket from the surrounding solvent.
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Affiliation(s)
- T Suzuki
- Biological Institute, Graduate School of Science, Tohoku University, Sendai, Japan
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36
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Tada T, Watanabe YH, Matsuoka A, Ikeda-Saito M, Imai K, Ni-hei Y, Shikama K. African elephant myoglobin with an unusual autoxidation behavior: comparison with the H64Q mutant of sperm whale myoglobin. BIOCHIMICA ET BIOPHYSICA ACTA 1998; 1387:165-76. [PMID: 9748556 DOI: 10.1016/s0167-4838(98)00118-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Elephant myoglobins both from Asian and African species have a glutamine in place of the usual distal (E7) histidine at position 64. We have isolated native oxymyoglobin directly from the skeletal muscle of African elephant (Loxodonta africana), and examined the autoxidation rate of oxymyoglobin (MbO2) to metmyoglobin (metMb) as a function of pH in 0.1 M buffer at 25 degreesC. As a result, African elephant MbO2 was found to be equally resistant to autoxidation as sperm whale myoglobin. However, the elephant myoglobin exhibited a distinct rate saturation below pH 6. Kinetic analysis of the pH profiles for the autoxidation rate has disclosed that African elephant MbO2 does not show any proton-catalyzed process, such as the one that can play a dominant role in the autoxidation reaction of sperm whale myoglobin by involving the distal histidine as its catalytic residue. Such a greater stability of African elephant MbO2 at low pH could be explained almost completely by the single H64Q mutation of sperm whale myoglobin. In African elephant aqua-metmyoglobin the Soret band was considerably broadened so as to produce another peak in the pentacoordinate 395 nm region. This unique spectral feature was therefore analyzed to show that the myoglobin is in equilibrium between two species, depending upon the presence or absence of a water molecule at the sixth coordinate position.
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Affiliation(s)
- T Tada
- Biological Institute, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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Shikama K. The Molecular Mechanism of Autoxidation for Myoglobin and Hemoglobin: A Venerable Puzzle. Chem Rev 1998; 98:1357-1374. [PMID: 11848936 DOI: 10.1021/cr970042e] [Citation(s) in RCA: 213] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Keiji Shikama
- Biological Institute, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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Tsuruga M, Matsuoka A, Hachimori A, Sugawara Y, Shikama K. The molecular mechanism of autoxidation for human oxyhemoglobin. Tilting of the distal histidine causes nonequivalent oxidation in the beta chain. J Biol Chem 1998; 273:8607-15. [PMID: 9535834 DOI: 10.1074/jbc.273.15.8607] [Citation(s) in RCA: 102] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Human oxyhemoglobin showed a biphasic autoxidation curve containing two rate constants, i.e. kf for the fast autoxidation due to the alpha chains, and ks for the slow autoxidation of the beta chains, respectively. Consequently, the autoxidation of the HbO2 tetramer produces two different curves from the pH dependence of kf and ks. The analysis of these curves revealed that the beta chain of the HbO2 tetramer does not exhibit any proton-catalyzed autoxidation, unlike the alpha chain, where a proton-catalyzed process involving the distal histidine residue can play a dominant role in the autoxidation rate. When the alpha and beta chains were separated from the HbO2 tetramer, however, each chain was oxidized much more rapidly than in the tetrameric parent. Moreover, the separated beta chain was recovered completely to strong acid catalysis in its autoxidation rate. These new findings lead us to conclude that the formation of the alpha1beta1 contact produces in the beta chain a conformational constraint whereby the distal histidine at position 63 is tilted away slightly from the bound dioxygen, preventing the proton-catalyzed displacement of O-2 by a solvent water molecule. The beta chains have thus acquired a delayed autoxidation in the HbO2 tetramer.
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Affiliation(s)
- M Tsuruga
- Biological Institute, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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39
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Fenwick CW, English AM, Wishart JF. pH and Driving Force Dependence of Intramolecular Oxyferryl Heme Reduction in Myoglobin. J Am Chem Soc 1997. [DOI: 10.1021/ja963108g] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Craig W. Fenwick
- Contribution from the Department of Chemistry and Biochemistry, Concordia University, 1455 de Maisonneuve Boulevard West, Montreal, Quebec H3G 1M8, Canada, and Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973-5000
| | - Ann M. English
- Contribution from the Department of Chemistry and Biochemistry, Concordia University, 1455 de Maisonneuve Boulevard West, Montreal, Quebec H3G 1M8, Canada, and Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973-5000
| | - James F. Wishart
- Contribution from the Department of Chemistry and Biochemistry, Concordia University, 1455 de Maisonneuve Boulevard West, Montreal, Quebec H3G 1M8, Canada, and Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973-5000
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40
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Kolchinski AG, Korybut-Daszkiewicz B, Rybak-Akimova EV, Busch DH, Alcock NW, Clase HJ. Unsubstituted CyclidenesA Novel Family of Lacunar Dioxygen Carriers with Enhanced Stability toward Autoxidation: Synthesis, Characterization, and a Representative X-ray Structure. J Am Chem Soc 1997. [DOI: 10.1021/ja9624477] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. G. Kolchinski
- Contribution from the Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, and Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - B. Korybut-Daszkiewicz
- Contribution from the Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, and Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - E. V. Rybak-Akimova
- Contribution from the Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, and Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - D. H. Busch
- Contribution from the Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, and Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - N. W. Alcock
- Contribution from the Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, and Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - H. J. Clase
- Contribution from the Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, and Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
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41
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Tsuruga M, Shikama K. Biphasic nature in the autoxidation reaction of human oxyhemoglobin. BIOCHIMICA ET BIOPHYSICA ACTA 1997; 1337:96-104. [PMID: 9003441 DOI: 10.1016/s0167-4838(96)00156-2] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
In comparison with myoglobin molecule as a reference, we have studied the autoxidation rate of human oxyhemoglobin (HbO2) as a function of its concentration in 0.1 M buffer at 35 degrees C and in the presence of 1 mM EDTA. At pH 6.5, HbA showed a biphasic autoxidation reaction that can be described completely by a first-order rate equation containing two rate constants-kf, for fast autoxidation of the alpha-chain, and ks, for slow autoxidation of the beta-chain, respectively. When tetrameric HbO2 was dissociated into alpha beta-dimers by dilution, the value of kf increased markedly to an extent comparable with the autoxidation rate of horse heart oxymyoglobin (MbO2). The rate constant Ks, on the other hand, was found to remain at an almost constant value over the whole concentration range from 1.0 x 10(-3) M to 3.2 x 10(-6) M in heme. At pH 8.5 and pH 10.0, however, the autoxidation of HbO2 was monophasic, and no enhancement in the rate was observed by diluting hemoglobin solutions. Taking into consideration the effects of 2,3-diphosphoglyceric acid and chloride anion on the autoxidation rate of HbO2, we have characterized the differential susceptibility of the alpha- and beta-chains to the autoxidation reaction in aqueous solution.
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Affiliation(s)
- M Tsuruga
- Biological Institute, Graduate School of Science, Tohoku University, Sendai, Japan
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42
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The dimer-monomer conversion of Cerithidea myoglobin coupled with the heme iron oxidation. Comp Biochem Physiol B Biochem Mol Biol 1996. [DOI: 10.1016/s0305-0491(96)00162-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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43
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44
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Franceschi F, Gullotti M, Monzani E, Casella L, Papaefthymiou V. Cytochrome c oxidase models. A novel dinuclear iron–copper complex derived from a covalently modified deuteroporphyrin–L-histidine–bis(benzimidazole) ligand. Chem Commun (Camb) 1996. [DOI: 10.1039/cc9960001645] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Shikama K, Matsuoka A, Iwaasa H. The unique structures of protozoan myoglobin and yeast hemoglobin: an evolutionary diversity. Int J Biochem Cell Biol 1995; 27:1107-15. [PMID: 7584595 DOI: 10.1016/1357-2725(95)00084-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A hemoglobin-like protein is found in some of the single-celled organisms, but its structure is quite different from that of mammalian myoglobin or hemoglobin. For instance, a protozoan myoglobin isolated from Paramecium caudatum consists of 116 amino acid residues, so that this contracted form is nearly two thirds of sperm whale myoglobin. Yeast hemoglobin from Candida norvegensis, on the other hand, is composed of a single polypeptide chain with 387 amino acid residues, but of two distinct domains carrying different functions; that is the N-terminal, heme-containing region and the C-terminal, FAD-containing reductase domain. The very unique structures of these ancient hemoproteins tell us their own strategies to overcome many difficulties in the reversible and stable binding of molecular oxygen, a very strong oxidizing agent, to the heme iron(II) in aqueous solutions.
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Affiliation(s)
- K Shikama
- Biological Institute, Faculty of Science, Tohoku University, Sendai, Japan
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46
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Atef MM, Abd el-Baset MS, el-Kareem A, Aida S, Fadel MA. Effects of a static magnetic field on haemoglobin structure and function. Int J Biol Macromol 1995; 17:105-11. [PMID: 7547716 DOI: 10.1016/0141-8130(95)93525-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The exposure of mice to static magnetic fields (MF) of different strengths (1000-4000 G) for 10 min was studied. The effects of these magnetic fields on the function of haemoglobin (Hb), and its conformational stability, auto-oxidation kinetics, bioenergetics and viscosity, and those of different Hb derivatives were investigated. The fractions and concentrations of the inactive Hb pigments (such as methaemoglobin, carboxyhaemoglobin and sulfohaemoglobin) and the active Hb (in the HbO2 form) were determined using a newly developed multi-component spectrophotometric method. The direct effect of magnetic fields of relatively high strengths (3500 and 4000 G) led to different Hb conformations, accompanied by changes in intermolecular interactions represented by the slope of the eta sp/C = F(C) lines and Huggins' constant K', while no measurable change in the intrinsic viscosity [eta] of Hb was observed. These results indicate a lack of changes in the dimensions and shape of the Hb molecule. Study of the kinetics of oxyhaemoglobin auto-oxidation revealed decreases in the auto-oxidation reaction rate of 2-5.9% and 10-17%, under the effect of static MFs of strengths 1000-2500 G and 3500-4000 G, respectively.
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Affiliation(s)
- M M Atef
- Biochemistry Department, National Research Center, Cairo, Egypt
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47
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Akiyama K, Fukuda M, Kobayashi N, Matsuoka A, Shikama K. The pH-dependent swinging-out of the distal histidine residue in ferric hemoglobin of a midge larva (Tokunagayusurika akamusi). BIOCHIMICA ET BIOPHYSICA ACTA 1994; 1208:306-9. [PMID: 7947962 DOI: 10.1016/0167-4838(94)90117-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Hemoglobin VII (TaVII) is a major component in the larval hemolymph of Tokunagayusurika akamusi, a common midge (Diptera) found in Japan. This protein contains 150 amino-acid residues including the usual distal histidine at position 64. When the aquomet-form was placed in acidic pH range, its Soret peak was considerably blue-shifted and accompanied by a marked decrease in intensity, indicative of the protein being converted into a structure quite similar to that of Aplysia myoglobin lacking the distal histidine residue. The pH-dependent magnetic circular dichroism spectra in the Soret region have also revealed that TaVII hemoglobin is in an equilibrium between a hexacoordinate and a pentacoordinate structure for its ferric heme iron. We attribute this to a transition from an iron-ligated water molecule that is hydrogen-bonded to the distal histidine, to a water-free iron with the histidine swung-out of the heme pocket. Furthermore, this process was described by the involvement of a single dissociable group with pKa = 6.3 in 0.1 M KCl at 25 degrees C.
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Affiliation(s)
- K Akiyama
- Biological Institute, Tohoku University, Sendai, Japan
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48
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Shikama K, Matsuoka A. Aplysia myoglobin with unusual properties: another prototype in myoglobin and haemoglobin biochemistry. Biol Rev Camb Philos Soc 1994; 69:233-51. [PMID: 8054446 DOI: 10.1111/j.1469-185x.1994.tb01507.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- K Shikama
- Biological Institute, Faculty of Science, Tohoku University, Sendai, Japan
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49
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Tajima G, Shikama K. Decomposition of hydrogen peroxide by metmyoglobin: a cyclic formation of the ferryl intermediate. THE INTERNATIONAL JOURNAL OF BIOCHEMISTRY 1993; 25:101-5. [PMID: 8432378 DOI: 10.1016/0020-711x(93)90495-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
1. Metmyoglobin reacted with H2O2 to form ferryl-myoglobin, which reverted back spontaneously to the met-form. 2. Through this cyclic reaction of myoglobin between metMb(III) and ferryl-Mb(IV), we proposed that H2O2, one of the potent oxidants in vivo, can be decomposed continuously in cardiac and skeletal muscle tissues in the absence of catalase and peroxidase.
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Affiliation(s)
- G Tajima
- Department of Biological Science, College of General Education, Tohoku University, Sendai, Japan
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Matsuoka A, Kobayashi N, Shikama K. The Soret magnetic circular dichroism of ferric high-spin myoglobins. A probe for the distal histidine residue. EUROPEAN JOURNAL OF BIOCHEMISTRY 1992; 210:337-41. [PMID: 1446682 DOI: 10.1111/j.1432-1033.1992.tb17426.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
To find a simple criterion for the presence of the distal (E7) histidine residue in myoglobins and hemoglobins, the Soret magnetic-circular-dichroic spectra were examined for ferric metmyoglobins from various species. A distinct and symmetric dispersion-type curve was obtained for myoglobins containing the distal histidine, whereas a relatively weak and unsymmetric pattern was observed for myoglobins lacking this residue, such as those from three kinds of gastropodic sea molluscs, a shark and the African elephant. The magnetic-circular-dichroic spectra obtained would thus be a direct reflection of the presence or absence of a water molecule at the sixth coordinate position of the heme iron(III), this axial water ligand being stabilized by hydrogen-bond formation to the distal histidine residue. On the basis of these Soret magnetic-circular-dichroic signals, we also examined the structure of a protozoan myoglobin (or a monomeric hemoglobin) from Paramecium caudatum of particular interest for the evolution of these proteins from protozoa to higher animals.
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Affiliation(s)
- A Matsuoka
- Biological Institute and Pharmaceutical Institute, Tohoku University, Sendai, Japan
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