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Giménez RE, Vargová V, Rey V, Turbay MBE, Abatedaga I, Morán Vieyra FE, Paz Zanini VI, Mecchia Ortiz JH, Katz NE, Ostatná V, Borsarelli CD. Interaction of singlet oxygen with bovine serum albumin and the role of the protein nano-compartmentalization. Free Radic Biol Med 2016; 94:99-109. [PMID: 26898504 DOI: 10.1016/j.freeradbiomed.2016.02.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 02/13/2016] [Accepted: 02/15/2016] [Indexed: 12/30/2022]
Abstract
Singlet molecular oxygen ((1)O2) contributes to protein damage triggering biophysical and biochemical changes that can be related with aging and oxidative stress. Serum albumins, such as bovine serum albumin (BSA), are abundant proteins in blood plasma with different biological functions. This paper presents a kinetic and spectroscopic study of the (1)O2-mediated oxidation of BSA using the tris(2,2'-bipyridine)ruthenium(II) cation [Ru(bpy)3](2+) as sensitizer. BSA quenches efficiently (1)O2 with a total (chemical+physical interaction) rate constant kt(BSA)=7.3(±0.4)×10(8)M(-1)s(-1), where the chemical pathway represented 37% of the interaction. This efficient quenching by BSA indicates the participation of several reactive residues. MALDI-TOF MS analysis of intact BSA confirmed that after oxidation by (1)O2, the mass protein increased the equivalent of 13 oxygen atoms. Time-resolved emission spectra analysis of BSA established that Trp residues were oxidized to N'-formylkynurenine, being the solvent-accessible W134 preferentially oxidized by (1)O2 as compared with the buried W213. MS confirmed oxidation of at least two Tyr residues to form dihydroxyphenylalanine, with a global reactivity towards (1)O2 six-times lower than for Trp residues. Despite the lack of MS evidences, kinetic and chemical analysis also suggested that residues other than Trp and Tyr, e.g. Met, must react with (1)O2. Modeling of the 3D-structure of BSA indicated that the oxidation pattern involves a random distribution of (1)O2 into BSA; allowing also the interaction of (1)O2 with buried residues by its diffusion from the bulk solvent through interconnected internal hydrophilic and hydrophobic grooves.
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Affiliation(s)
- Rodrigo E Giménez
- Instituto de Bionanotecnología, INBIONATEC-CONICET, Universidad Nacional de Santiago del Estero (UNSE), RN9, Km 1125, G4206XCP Santiago del Estero, Argentina
| | - Veronika Vargová
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Královopolská 135, 612 65 Brno, Czech Republic
| | - Valentina Rey
- Instituto de Bionanotecnología, INBIONATEC-CONICET, Universidad Nacional de Santiago del Estero (UNSE), RN9, Km 1125, G4206XCP Santiago del Estero, Argentina
| | - M Beatriz Espeche Turbay
- Instituto de Bionanotecnología, INBIONATEC-CONICET, Universidad Nacional de Santiago del Estero (UNSE), RN9, Km 1125, G4206XCP Santiago del Estero, Argentina
| | - Inés Abatedaga
- Instituto de Bionanotecnología, INBIONATEC-CONICET, Universidad Nacional de Santiago del Estero (UNSE), RN9, Km 1125, G4206XCP Santiago del Estero, Argentina
| | - Faustino E Morán Vieyra
- Instituto de Bionanotecnología, INBIONATEC-CONICET, Universidad Nacional de Santiago del Estero (UNSE), RN9, Km 1125, G4206XCP Santiago del Estero, Argentina
| | - Verónica I Paz Zanini
- Instituto de Bionanotecnología, INBIONATEC-CONICET, Universidad Nacional de Santiago del Estero (UNSE), RN9, Km 1125, G4206XCP Santiago del Estero, Argentina
| | - Juan H Mecchia Ortiz
- INQUINOA-CONICET, Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, T4000INI San Miguel de Tucumán, Argentina
| | - Néstor E Katz
- INQUINOA-CONICET, Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, T4000INI San Miguel de Tucumán, Argentina
| | - Veronika Ostatná
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Královopolská 135, 612 65 Brno, Czech Republic
| | - Claudio D Borsarelli
- Instituto de Bionanotecnología, INBIONATEC-CONICET, Universidad Nacional de Santiago del Estero (UNSE), RN9, Km 1125, G4206XCP Santiago del Estero, Argentina.
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Fast structural changes (200-900ns) may prepare the photosynthetic manganese complex for oxidation by the adjacent tyrosine radical. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2012; 1817:1196-207. [PMID: 22579714 DOI: 10.1016/j.bbabio.2012.04.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Revised: 04/25/2012] [Accepted: 04/30/2012] [Indexed: 11/20/2022]
Abstract
The Mn complex of photosystem II (PSII) cycles through 4 semi-stable states (S(0) to S(3)). Laser-flash excitation of PSII in the S(2) or S(3) state induces processes with time constants around 350ns, which have been assigned previously to energetic relaxation of the oxidized tyrosine (Y(Z)(ox)). Herein we report monitoring of these processes in the time domain of hundreds of nanoseconds by photoacoustic (or 'optoacoustic') experiments involving pressure-wave detection after excitation of PSII membrane particles by ns-laser flashes. We find that specifically for excitation of PSII in the S(2) state, nuclear rearrangements are induced which amount to a contraction of PSII by at least 30Å(3) (time constant of 350ns at 25°C; activation energy of 285+/-50meV). In the S(3) state, the 350-ns-contraction is about 5 times smaller whereas in S(0) and S(1), no volume changes are detectable in this time domain. It is proposed that the classical S(2)=>S(3) transition of the Mn complex is a multi-step process. The first step after Y(Z)(ox) formation involves a fast nuclear rearrangement of the Mn complex and its protein-water environment (~350ns), which may serve a dual role: (1) The Mn- complex entity is prepared for the subsequent proton removal and electron transfer by formation of an intermediate state of specific (but still unknown) atomic structure. (2) Formation of the structural intermediate is associated (necessarily) with energetic relaxation and thus stabilization of Y(Z)(ox) so that energy losses by charge recombination with the Q(A)(-) anion radical are minimized. The intermediate formed within about 350ns after Y(Z)(ox) formation in the S(2)-state is discussed in the context of two recent models of the S(2)=>S(3) transition of the water oxidation cycle. This article is part of a Special Issue entitled: Photosynthesis Research for Sustainability: From Natural to Artificial.
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Rappon M. Electrodilatometry. J Mol Liq 2006. [DOI: 10.1016/j.molliq.2006.03.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Rappon M, Lin SWE. Electrodilatometry 5: Triton X-100 (reduced form) in cyclohexane. J Mol Liq 2005. [DOI: 10.1016/j.molliq.2004.10.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Gensch T, Viappiani C. Time-resolved photothermal methods: accessing time-resolved thermodynamics of photoinduced processes in chemistry and biology. Photochem Photobiol Sci 2003; 2:699-721. [PMID: 12911218 DOI: 10.1039/b303177b] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photothermal methods are currently being employed in a variety of research areas, ranging from materials science to environmental monitoring. Despite the common term which they are collected under, the implementations of these techniques are as diverse as the fields of application. In this review, we concentrate on the recent applications of time-resolved methods in photochemistry and photobiology.
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Affiliation(s)
- Thomas Gensch
- Forschungszentrum Jülich, Institut für Biologische Informationsverarbeitung 1, 52425 Jülich, Germany.
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Churio MS, Brusa MA, Grela MA. Application of photoacoustic calorimetry to the determination of volume changes in reactions involving radical anions in aqueous solutions. Photochem Photobiol Sci 2003; 2:754-8. [PMID: 12911223 DOI: 10.1039/b301838e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The particular features of the application of photoacoustic calorimetry to the determination of volume changes in reactions involving radical anions in aqueous solutions are addressed. Analysis of recent literature data on volume changes of redox pairs, including our previous results on the couples NO2(-)/NO2 and SO4(2-)/(SO4)*-, together with known values of molal volume changes for ionization reactions, allow us to derive an empirical correlation for these categories of reactions. Finally, the pertinence of describing the volume changes of complex processes as a simple sum of separable terms is critically examined.
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Affiliation(s)
- María S Churio
- Departamento de Química, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, CC 624 (7600) Mar del Plata, Argentina.
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Borsarelli CD, Bertolotti SG, Previtali CM. Thermodynamic changes associated with the formation of the hydrated electron after photoionization of inorganic anions: a time-resolved photoacoustic study. Photochem Photobiol Sci 2003; 2:791-5. [PMID: 12911229 DOI: 10.1039/b302050a] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The enthalpy and volume changes, deltaH and deltaV, associated with the 266 nm laser-induced photoionization reactions of aqueous ferrocyanide and iodide ions, to yield the hydrated electron, e(-)aq, and oxidized products were determined by temperature-dependent time-resolved photoacoustics. The photoionization quantum yield as function of temperature (9-30 degrees C) was determined by laser flash photolysis actinometry. The obtained values were used for the calculation of thermodynamic parameters associated with the formation of e(-)aq, such as the apparent partial molar volume, V(o)e = 26 cm3 mol(-1), and the standard formation enthalpy and entropy changes, deltaH(o)f,e = 31 kJ mol(-1) and TdeltaS(o)f,e = 338 kJ mol(-1). These results indicate that the formation of the aqueous excess electron solution is governed by the increase in entropy in the three-dimensional hydrogen-bonding network of water.
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Affiliation(s)
- Claudio D Borsarelli
- Instituto de Ciencias Químicas, Universidad Nacional de Santiago del Estero, Av. Belgrano (S) 1912, 4200 Santiago del Estero, Argentina.
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Molecular volume and enthalpy changes associated with irreversible photo-reactions. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2002. [DOI: 10.1016/s1389-5567(02)00021-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Feitelson J, Mauzerall D. Enthalpy and Electrostriction in the Electron-Transfer Reaction between Triplet Zinc Uroporphyrin and Ferricyanide. J Phys Chem B 2002. [DOI: 10.1021/jp020408d] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Jehuda Feitelson
- The Rockefeller University, 1230 York Avenue, New York, New York 10021, and Department of Physical Chemistry and Farkas Center for Light Induced Processes, The Hebrew University, Jerusalem, Israel 91904
| | - David Mauzerall
- The Rockefeller University, 1230 York Avenue, New York, New York 10021, and Department of Physical Chemistry and Farkas Center for Light Induced Processes, The Hebrew University, Jerusalem, Israel 91904
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Herbrich RP, Schmidt R. Investigation of the pyrene/N,N′-diethylaniline exciplex by photoacoustic calorimetry and fluorescence spectroscopy. J Photochem Photobiol A Chem 2000. [DOI: 10.1016/s1010-6030(00)00216-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Gensch T, Viappiani C, Braslavsky SE. Structural Volume Changes upon Photoexcitation of Porphyrins: Role of the Nitrogen−Water Interactions. J Am Chem Soc 1999. [DOI: 10.1021/ja9913885] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Thomas Gensch
- Contribution from the Max-Planck-Institut für Strahlenchemie, Postfach 101365, D-45413 Mülheim an der Ruhr, Germany, and Dipartimento di Fisica, Università di Parma and Istituto Nazionale per la Fisica della Materia (INFM), viale delle Scienze, 43100 Parma, Italia
| | - Cristiano Viappiani
- Contribution from the Max-Planck-Institut für Strahlenchemie, Postfach 101365, D-45413 Mülheim an der Ruhr, Germany, and Dipartimento di Fisica, Università di Parma and Istituto Nazionale per la Fisica della Materia (INFM), viale delle Scienze, 43100 Parma, Italia
| | - Silvia E. Braslavsky
- Contribution from the Max-Planck-Institut für Strahlenchemie, Postfach 101365, D-45413 Mülheim an der Ruhr, Germany, and Dipartimento di Fisica, Università di Parma and Istituto Nazionale per la Fisica della Materia (INFM), viale delle Scienze, 43100 Parma, Italia
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Losi A, Vecll A, Viappiani C. Photoinduced Structural Volume Changes in Aqueous Solutions of Blepharismin. Photochem Photobiol 1999. [DOI: 10.1111/j.1751-1097.1999.tb03309.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Borsarelli CD, Braslavsky SE. Enthalpy, Volume, and Entropy Changes Associated with the Electron Transfer Reaction between the 3MLCT State of Ru(Bpy)32+ and Methyl Viologen Cation in Aqueous Solutions. J Phys Chem A 1999. [DOI: 10.1021/jp984201p] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Claudio D. Borsarelli
- Max-Planck-Institut für Strahlenchemie, Postfach 10 13 65, D-45413 Mülheim an der Ruhr, Germany
| | - Silvia E. Braslavsky
- Max-Planck-Institut für Strahlenchemie, Postfach 10 13 65, D-45413 Mülheim an der Ruhr, Germany
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Kirby JP, Weldon BT, McCusker JK. Experimental Observation of Excited-State Electron Transfer Quenching Involving Exchange-Coupled Dinuclear Fe(III) Complexes. Inorg Chem 1998; 37:3658-3659. [PMID: 11670461 DOI: 10.1021/ic980561f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- James P. Kirby
- Contribution from the Department of Chemistry University of California at Berkeley Berkeley, California 94720-1460
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Borsarelli CD, Braslavsky SE. Volume Changes Correlate with Enthalpy Changes during the Photoinduced Formation of the 3MLCT State of Ruthenium(II) Bipyridine Cyano Complexes in the Presence of Salts. A Case of the Entropy−Enthalpy Compensation Effect. J Phys Chem B 1998. [DOI: 10.1021/jp981235o] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Claudio D. Borsarelli
- Max-Planck-Institut für Strahlenchemie, Postfach 10 13 65, D-45413 Mülheim an der Ruhr, Germany
| | - Silvia E. Braslavsky
- Max-Planck-Institut für Strahlenchemie, Postfach 10 13 65, D-45413 Mülheim an der Ruhr, Germany
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