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Diuba AV, Vygodina TV, Azarkina NV, Arutyunyan AM, Soulimane T, Vos MH, Konstantinov AA. Individual heme a and heme a 3 contributions to the Soret absorption spectrum of the reduced bovine cytochrome c oxidase. BIOCHIMICA ET BIOPHYSICA ACTA. BIOENERGETICS 2023; 1864:148937. [PMID: 36403793 DOI: 10.1016/j.bbabio.2022.148937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 10/24/2022] [Accepted: 11/11/2022] [Indexed: 11/19/2022]
Abstract
Bovine cytochrome c oxidase (CcO) contains two hemes, a and a3, chemically identical but differing in coordination and spin state. The Soret absorption band of reduced aa3-type cytochrome c oxidase consists of overlapping bands of the hemes a2+ and a32+. It shows a peak at ∼444 nm and a distinct shoulder at ∼425 nm. However, attribution of individual spectral lineshapes to hemes a2+ and a32+ in the Soret is controversial. In the present work, we characterized spectral contributions of hemes a2+ and a32+ using two approaches. First, we reconstructed bovine CcO heme a2+ spectrum using a selective Ca2+-induced spectral shift of the heme a2+. Second, we investigated photobleaching of the reduced Thermus thermophilus ba3- and bovine aa3-oxidases in the Soret induced by femtosecond laser pulses in the Q-band. The resolved spectra show splitting of the electronic B0x-, B0y-transitions of both reduced hemes. The heme a2+ spectrum is shifted to the red relative to heme a32+ spectrum. The ∼425 nm shoulder is mostly attributed to heme a32+.
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Affiliation(s)
- Artem V Diuba
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Leninskie Gory 1, Bld.40, Moscow 119992, Russia.
| | - Tatiana V Vygodina
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Leninskie Gory 1, Bld.40, Moscow 119992, Russia.
| | - Natalia V Azarkina
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Leninskie Gory 1, Bld.40, Moscow 119992, Russia.
| | - Alexander M Arutyunyan
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Leninskie Gory 1, Bld.40, Moscow 119992, Russia.
| | - Tewfik Soulimane
- Materials and Surface Science Institute, University of Limerick, V94 T9PX, Ireland.
| | - Marten H Vos
- LOB, CNRS, INSERM, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau 91120, France.
| | - Alexander A Konstantinov
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Leninskie Gory 1, Bld.40, Moscow 119992, Russia
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Kopcova K, Blascakova L, Kozar T, Jancura D, Fabian M. Response of Heme Symmetry to the Redox State of Bovine Cytochrome c Oxidase. Biochemistry 2018; 57:4105-4113. [PMID: 29901388 DOI: 10.1021/acs.biochem.8b00459] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Second-derivative absorption spectroscopy was employed to monitor the response of effective symmetry of cytochromes a and a3 to the redox and ligation states of bovine cytochrome c oxidase (CcO). The Soret band π → π* electronic transitions were used to display the changes in symmetry of these chromophores induced by the reduction of CcO inhibited by the exogenous ligands and during catalytic turnover. The second derivative of the difference absorption spectra revealed only a single Soret band for the oxidized cytochromes a and a3 and cyanide-ligated oxidized cytochrome a3. In contrast, two absorption bands were resolved in ferrous cytochrome a and ferrous cytochrome a3 ligated with cyanide. A transition from one-band spectrum to two-band spectrum indicates the lowering of symmetry of these hemes due to the alteration of their immediate surroundings. It is suggested that the changes in polarity occurring in the vicinity of these cofactors are main reason for the split of the Soret band of both ferrous cytochrome a and cyanide-bound ferrous cytochrome a3.
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Affiliation(s)
- Katarina Kopcova
- Department of Biophysics, Faculty of Science , University of P. J. Safarik , Jesenna 5 , 041 54 Kosice , Slovak Republic
| | - Ludmila Blascakova
- Center for Interdisciplinary Biosciences, Technology and Innovation Park , University of P. J. Safarik , Jesenna 5 , 041 54 Kosice , Slovak Republic
| | - Tibor Kozar
- Center for Interdisciplinary Biosciences, Technology and Innovation Park , University of P. J. Safarik , Jesenna 5 , 041 54 Kosice , Slovak Republic
| | - Daniel Jancura
- Department of Biophysics, Faculty of Science , University of P. J. Safarik , Jesenna 5 , 041 54 Kosice , Slovak Republic.,Center for Interdisciplinary Biosciences, Technology and Innovation Park , University of P. J. Safarik , Jesenna 5 , 041 54 Kosice , Slovak Republic
| | - Marian Fabian
- Center for Interdisciplinary Biosciences, Technology and Innovation Park , University of P. J. Safarik , Jesenna 5 , 041 54 Kosice , Slovak Republic
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Dyuba AV, Vygodina TV, Konstantinov AA. Reconstruction of absolute absorption spectrum of reduced heme a in cytochrome C oxidase from bovine heart. BIOCHEMISTRY (MOSCOW) 2014; 78:1358-65. [PMID: 24460970 DOI: 10.1134/s0006297913120067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This paper presents a new experimental approach for determining the individual optical characteristics of reduced heme a in bovine heart cytochrome c oxidase starting from a small selective shift of the heme a absorption spectrum induced by calcium ions. The difference spectrum induced by Ca2+ corresponds actually to a first derivative (differential) of the heme a(2+) absolute absorption spectrum. Such an absolute spectrum was obtained for the mixed-valence cyanide complex of cytochrome oxidase (a(2+)a3(3+)-CN) and was subsequently used as a basis spectrum for further procession and modeling. The individual absorption spectrum of the reduced heme a in the Soret region was reconstructed as the integral of the difference spectrum induced by addition of Ca2+. The spectrum of heme a(2+) in the Soret region obtained in this way is characterized by a peak with a maximum at 447 nm and half-width of 17 nm and can be decomposed into two Gaussians with maxima at 442 and 451 nm and half-widths of ~10 nm (589 cm(-1)) corresponding to the perpendicularly oriented electronic π→π* transitions B0x and B0y in the porphyrin ring. The reconstructed spectrum in the Soret band differs significantly from the "classical" absorption spectrum of heme a(2+) originally described by Vanneste (Vanneste, W. H. (1966) Biochemistry, 65, 838-848). The differences indicate that the overall γ-band of heme a(2+) in cytochrome oxidase contains in addition to the B0x and B0y transitions extra components that are not sensitive to calcium ions, or, alternatively, that the Vanneste's spectrum of heme a(2+) contains significant contribution from heme a3(2+). The reconstructed absorption band of heme a(2+) in the α-band with maximum at 605 nm and half-width of 18 nm (850 cm(-1)) corresponds most likely to the individual Q0y transition of heme a, whereas the Q0x transition contributes only weakly to the spectrum.
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Affiliation(s)
- A V Dyuba
- Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology, Moscow, 119991, Russia.
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Mutation of cysteine residues alters the heme-binding pocket of indoleamine 2,3-dioxygenase-1. Biochem Biophys Res Commun 2013; 436:595-600. [DOI: 10.1016/j.bbrc.2013.05.119] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Accepted: 05/29/2013] [Indexed: 11/21/2022]
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Dyuba AV, Arutyunyan AM, Vygodina TV, Azarkina NV, Kalinovich AV, Sharonov YA, Konstantinov AA. Circular dichroism spectra of cytochrome c oxidase. Metallomics 2011; 3:417-32. [DOI: 10.1039/c0mt00099j] [Citation(s) in RCA: 5] [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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Horvath MP, Copeland RA, Makinen MW. The second derivative electronic absorption spectrum of cytochrome c oxidase in the Soret region. Biophys J 1999; 77:1694-711. [PMID: 10465779 PMCID: PMC1300456 DOI: 10.1016/s0006-3495(99)77016-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The electronic absorption spectrum of solubilized beef heart cytochrome c oxidase was analyzed in the 400-500 nm region to identify the origin of doublet features appearing in the second derivative spectrum associated with ferrocytochrome a. This doublet, centered near 22,600 cm(-1), was observed in the direct absorption spectrum of the a(2+)a(3)(3+).HCOO(-) form of the enzyme at cryogenic temperatures. Since evidence for this doublet at room temperature is obtained only on the basis of the second derivative spectrum, a novel mathematical approach was developed to analyze the resolving power of second derivative spectroscopy as a function of parameterization of spectral data. Within the mathematical limits defined for resolving spectral features, it was demonstrated that the integrated intensity of the doublet feature near 450 nm associated with ferrocytochrome a is independent of the ligand and oxidation state of cytochrome a(3). Furthermore, the doublet features, also observed in cytochrome c oxidase from Paracoccus denitrificans, were similarly associated with the heme A component and were correspondingly independent of the ligand and oxidation state of the heme A(3) chromophore. The doublet features are attributed to lifting of the degeneracy of the x and y polarized components of the B state of the heme A chromophore associated with the Soret transition.
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Affiliation(s)
- M P Horvath
- Department of Biochemistry and Molecular Biology, The University of Chicago, Cummings Life Science Center, Chicago, Illinois 60637 USA
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Shoji K, Tanigawa M, Hori K, Tomozawa Y, Yamanaka T. The effects of several nucleotides on the molecular state and catalytic activity of Thiobacillus novellus cytochrome c oxidase. ATP affects the oxidase uniquely. EUROPEAN JOURNAL OF BIOCHEMISTRY 1999; 264:960-4. [PMID: 10491145 DOI: 10.1046/j.1432-1327.1999.00703.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The catalytic activity and molecular aspects of Thiobacillus novellus cytpchrome c oxidase were affected by ATP. The steady-state kinetics in the oxidation of ferrocytochrome c by the oxidase varied with the presence or absence of ATP; the [S]-v curve of the reaction was sigmoid in the absence of ATP whereas it was a Michaelis-Menten-type hyperbola in the presence of 700 microM ATP. The oxidase was a dimer of the minimal structural subunit consisting of one molecule each of two subunits in the presence of Tween 20 and in the absence of ATP. The dimer dissociated into monomers in the presence of 700 microM ATP. The trough at 452 nm seen in the second derivative absorption spectrum of the CO compound of the oxidase in the absence of ATP, a characteristic of the cytochrome a component of cytochrome aa3, dissappeared in the presence of 700 microM ATP. However, ADP, AMP, GTP, CTP and UTP had little affect on both the [S]-v curve and the molecular mass of the oxidase when used in place of ATP.
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Affiliation(s)
- K Shoji
- Department of Industrial Chemistry, College of Science and Technology, Nihon University, Tokyo, Japan
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