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Krekic S, Mero M, Kuhl M, Balasubramanian K, Dér A, Heiner Z. Photoactive Yellow Protein Adsorption at Hydrated Polyethyleneimine and Poly-l-Glutamic Acid Interfaces. Molecules 2023; 28:molecules28104077. [PMID: 37241818 DOI: 10.3390/molecules28104077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 05/07/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023] Open
Abstract
Chiral and achiral vibrational sum-frequency generation (VSFG) spectroscopy was performed in the 1400-1700 and 2800-3800 cm-1 range to study the interfacial structure of photoactive yellow protein (PYP) adsorbed on polyethyleneimine (PEI) and poly-l-glutamic acid (PGA) surfaces. Nanometer-thick polyelectrolyte layers served as the substrate for PYP adsorption, with 6.5-pair layers providing the most homogeneous surfaces. When the topmost material was PGA, it acquired a random coil structure with a small number of β2-fibrils. Upon adsorption on oppositely charged surfaces, PYP yielded similar achiral spectra. However, the VSFG signal intensity increased for PGA surfaces with a concomitant redshift of the chiral Cα-H and N-H stretching bands, suggesting increased adsorption for PGA compared to PEI. At low wavenumbers, both the backbone and the side chains of PYP induced drastic changes to all measured chiral and achiral VSFG spectra. Decreasing ambient humidity led to the loss of tertiary structure with a re-orientation of α-helixes, evidenced by a strongly blue-shifted chiral amide I band of the β-sheet structure with a shoulder at 1654 cm-1. Our observations indicate that chiral VSFG spectroscopy is not only capable of determining the main type of secondary structure of PYP, i.e., β-scaffold, but is also sensitive to tertiary protein structure.
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Affiliation(s)
- Szilvia Krekic
- School of Analytical Sciences Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
- Institute of Biophysics, Biological Research Centre, 6726 Szeged, Hungary
- Doctoral School of Multidisciplinary Medical Sciences, University of Szeged, 6720 Szeged, Hungary
| | - Mark Mero
- Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, 12489 Berlin, Germany
| | - Michel Kuhl
- School of Analytical Sciences Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
- Department of Chemistry and IRIS Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
| | - Kannan Balasubramanian
- School of Analytical Sciences Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
- Department of Chemistry and IRIS Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
| | - András Dér
- Institute of Biophysics, Biological Research Centre, 6726 Szeged, Hungary
| | - Zsuzsanna Heiner
- School of Analytical Sciences Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
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Khoroshyy P, Tenger K, Chertkova RV, Bocharova OV, Kirpichnikov MP, Borovok N, Groma GI, Dolgikh DA, Kotlyar AB, Zimányi L. Kinetics and Energetics of Intramolecular Electron Transfer in Single-Point Labeled TUPS-Cytochrome c Derivatives. Molecules 2021; 26:molecules26226976. [PMID: 34834068 PMCID: PMC8621336 DOI: 10.3390/molecules26226976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/13/2021] [Accepted: 11/16/2021] [Indexed: 11/16/2022] Open
Abstract
Electron transfer within and between proteins is a fundamental biological phenomenon, in which efficiency depends on several physical parameters. We have engineered a number of horse heart cytochrome c single-point mutants with cysteine substitutions at various positions of the protein surface. To these cysteines, as well as to several native lysine side chains, the photoinduced redox label 8-thiouredopyrene-1,3,6-trisulfonate (TUPS) was covalently attached. The long-lived, low potential triplet excited state of TUPS, generated with high quantum efficiency, serves as an electron donor to the oxidized heme c. The rates of the forward (from the label to the heme) and the reverse (from the reduced heme back to the oxidized label) electron transfer reactions were obtained from multichannel and single wavelength flash photolysis absorption kinetic experiments. The electronic coupling term and the reorganization energy for electron transfer in this system were estimated from temperature-dependent experiments and compared with calculated parameters using the crystal and the solution NMR structure of the protein. These results together with the observation of multiexponential kinetics strongly support earlier conclusions that the flexible arm connecting TUPS to the protein allows several shortcut routes for the electron involving through space jumps between the label and the protein surface.
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Affiliation(s)
- Petro Khoroshyy
- Institute of Biophysics, Biological Research Centre, Temesvári Körút 62, H-6726 Szeged, Hungary; (P.K.); (K.T.); (G.I.G.)
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Science, Flemingovo Náměstí 542/2, 16000 Prague, Czech Republic
| | - Katalin Tenger
- Institute of Biophysics, Biological Research Centre, Temesvári Körút 62, H-6726 Szeged, Hungary; (P.K.); (K.T.); (G.I.G.)
| | - Rita V. Chertkova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia; (R.V.C.); (O.V.B.); (M.P.K.); (D.A.D.)
| | - Olga V. Bocharova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia; (R.V.C.); (O.V.B.); (M.P.K.); (D.A.D.)
| | - Mikhail P. Kirpichnikov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia; (R.V.C.); (O.V.B.); (M.P.K.); (D.A.D.)
- Biology Department, Lomonosov Moscow State University, Leninskie Gory 1/12, 119899 Moscow, Russia
| | - Natalia Borovok
- Department of Biochemistry and Molecular Biology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel; (N.B.); (A.B.K.)
| | - Géza I. Groma
- Institute of Biophysics, Biological Research Centre, Temesvári Körút 62, H-6726 Szeged, Hungary; (P.K.); (K.T.); (G.I.G.)
| | - Dmitry A. Dolgikh
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia; (R.V.C.); (O.V.B.); (M.P.K.); (D.A.D.)
- Biology Department, Lomonosov Moscow State University, Leninskie Gory 1/12, 119899 Moscow, Russia
| | - Alexander B. Kotlyar
- Department of Biochemistry and Molecular Biology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel; (N.B.); (A.B.K.)
| | - László Zimányi
- Institute of Biophysics, Biological Research Centre, Temesvári Körút 62, H-6726 Szeged, Hungary; (P.K.); (K.T.); (G.I.G.)
- Correspondence:
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All-Optical Switching Demonstrated with Photoactive Yellow Protein Films. BIOSENSORS 2021; 11:bios11110432. [PMID: 34821648 PMCID: PMC8615624 DOI: 10.3390/bios11110432] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 10/19/2021] [Accepted: 10/28/2021] [Indexed: 12/02/2022]
Abstract
Integrated optics (IO) is a field of photonics which focuses on manufacturing circuits similar to those in integrated electronics, but that work on an optical basis to establish means of faster data transfer and processing. Currently, the biggest task in IO is finding or manufacturing materials with the proper nonlinear optical characteristics to implement as active components in IO circuits. Using biological materials in IO has recently been proposed, the first material to be investigated for this purpose being the protein bacteriorhodopsin; however, since then, other proteins have also been considered, such as the photoactive yellow protein (PYP). In our current work, we directly demonstrate the all-optical switching capabilities of PYP films combined with an IO Mach–Zehnder interferometer (MZI) for the first time. By exploiting photoreactions in the reaction cycle of PYP, we also show how a combination of exciting light beams can introduce an extra degree of freedom to control the operation of the device. Based on our results, we discuss how the special advantages of PYP can be utilized in future IO applications.
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Krekic S, Zakar T, Gombos Z, Valkai S, Mero M, Zimányi L, Heiner Z, Dér A. Nonlinear Optical Investigation of Microbial Chromoproteins. FRONTIERS IN PLANT SCIENCE 2020; 11:547818. [PMID: 33193480 PMCID: PMC7609429 DOI: 10.3389/fpls.2020.547818] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 09/22/2020] [Indexed: 06/01/2023]
Abstract
Membrane-bound or cytosolic light-sensitive proteins, playing a crucial role in energy- and signal-transduction processes of various photosynthetic microorganisms, have been optimized for sensing or harvesting light by myriads of years of evolution. Upon absorption of a photon, they undergo a usually cyclic reaction series of conformations, and the accompanying spectro-kinetic events assign robust nonlinear optical (NLO) properties for these chromoproteins. During recent years, they have attracted a considerable interest among researchers of the applied optics community as well, where finding the appropriate NLO material for a particular application is a pivotal task. Potential applications have emerged in various branches of photonics, including optical information storage and processing, higher-harmonic and white-light continuum generation, or biosensorics. In our earlier work, we also raised the possibility of using chromoproteins, such as bacteriorhodopsin (bR), as building blocks for the active elements of integrated optical (IO) circuits, where several organic and inorganic photonic materials have been considered as active components, but so far none of them has been deemed ideal for the purpose. In the current study, we investigate the linear and NLO properties of biofilms made of photoactive yellow protein (PYP) and bR. The kinetics of the photoreactions are monitored by time-resolved absorption experiments, while the refractive index of the films and its light-induced changes are measured using the Optical Waveguide Lightmode Spectroscopy (OWLS) and Z-scan techniques, respectively. The nonlinear refractive index and the refractive index change of both protein films were determined in the green spectral range in a wide range of intensities and at various laser repetition rates. The nonlinear refractive index and refractive index change of PYP were compared to those of bR, with respect to photonics applications. Our results imply that the NLO properties of these proteins make them promising candidates for utilization in applied photonics, and they should be considered as valid alternatives for active components of IO circuits.
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Affiliation(s)
- Szilvia Krekic
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
- Doctoral School of Multidisciplinary Medical Sciences, University of Szeged, Szeged, Hungary
| | - Tomás Zakar
- Institute of Plant Biology, Biological Research Centre, Szeged, Hungary
| | - Zoltán Gombos
- Institute of Plant Biology, Biological Research Centre, Szeged, Hungary
| | - Sándor Valkai
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
| | - Mark Mero
- Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Berlin, Germany
| | - László Zimányi
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
| | - Zsuzsanna Heiner
- School of Analytical Sciences Adlershof, Humboldt-Universität zu Berlin, Berlin, Germany
| | - András Dér
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
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Zsiros O, Ünnep R, Nagy G, Almásy L, Patai R, Székely NK, Kohlbrecher J, Garab G, Dér A, Kovács L. Role of Protein-Water Interface in the Stacking Interactions of Granum Thylakoid Membranes-As Revealed by the Effects of Hofmeister Salts. FRONTIERS IN PLANT SCIENCE 2020; 11:1257. [PMID: 32922427 PMCID: PMC7456932 DOI: 10.3389/fpls.2020.01257] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 07/30/2020] [Indexed: 05/08/2023]
Abstract
The thylakoid membranes of vascular plants are differentiated into stacked granum and unstacked stroma regions. The formation of grana is triggered by the macrodomain formation of photosystem II and light-harvesting complex II (PSII-LHCII) and thus their lateral segregation from the photosystem I-light-harvesting complex I (PSI-LHCI) super-complexes and the ATP-synthase; which is then stabilized by stacking interactions of the adjacent PSII-LHCII enriched regions of the thylakoid membranes. The self-assembly and dynamics of this highly organized membrane system and the nature of forces acting between the PSII-LHCII macrodomains are not well understood. By using circular dichroism (CD) spectroscopy, small-angle neutron scattering (SANS) and transmission electron microscopy (TEM), we investigated the effects of Hofmeister salts on the organization of pigment-protein complexes and on the ultrastructure of thylakoid membranes. We found that the kosmotropic agent (NH4)2SO4 and the Hofmeister-neutral NaCl, up to 2 M concentrations, hardly affected the macro-organization of the protein complexes and the membrane ultrastructure. In contrast, chaotropic salts, NaClO4, and NaSCN destroyed the mesoscopic structures, the multilamellar organization of the thylakoid membranes and the chiral macrodomains of the protein complexes but without noticeably affecting the short-range, pigment-pigment excitonic interactions. Comparison of the concentration- and time-dependences of SANS, TEM and CD parameters revealed the main steps of the disassembly of grana in the presence of chaotropes. It begins with a rapid diminishment of the long-range periodic order of the grana membranes, apparently due to an increased stacking disorder of the thylakoid membranes, as reflected by SANS experiments. SANS measurements also allowed discrimination between the cationic and anionic effects-in stacking and disorder, respectively. This step is followed by a somewhat slower disorganization of the TEM ultrastructure, due to the gradual loss of stacked membrane pairs. Occurring last is the stepwise decrease and disappearance of the long-range chiral order of the protein complexes, the rate of which was faster in LHCII-deficient membranes. These data are interpreted in terms of a theory, from our laboratory, according to which Hofmeister salts primarily affect the hydrophylic-hydrophobic interactions of proteins, and the stroma-exposed regions of the intrinsic membrane proteins, in particular-pointing to the role of protein-water interface in the stacking interactions of granum thylakoid membranes.
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Affiliation(s)
- Ottó Zsiros
- Institute of Plant Biology, Biological Research Centre, Szeged, Hungary
| | - Renáta Ünnep
- Neutron Spectroscopy Department, Centre for Energy Research, Budapest, Hungary
| | - Gergely Nagy
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, Villigen PSI, Switzerland
- Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Budapest, Hungary
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States
| | - László Almásy
- Neutron Spectroscopy Department, Centre for Energy Research, Budapest, Hungary
| | - Roland Patai
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
| | - Noémi K. Székely
- Jülich Centre for Neutron Science at MLZ, Forschungszentrum Jülich GmbH, Garching, Germany
| | - Joachim Kohlbrecher
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, Villigen PSI, Switzerland
| | - Győző Garab
- Institute of Plant Biology, Biological Research Centre, Szeged, Hungary
- Department of Physics, Faculty of Science, University of Ostrava, Ostrava, Czechia
- *Correspondence: Győző Garab, ; András Dér, ; László Kovács,
| | - András Dér
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
- *Correspondence: Győző Garab, ; András Dér, ; László Kovács,
| | - László Kovács
- Institute of Plant Biology, Biological Research Centre, Szeged, Hungary
- *Correspondence: Győző Garab, ; András Dér, ; László Kovács,
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Santa-Maria AR, Walter FR, Valkai S, Brás AR, Mészáros M, Kincses A, Klepe A, Gaspar D, Castanho MARB, Zimányi L, Dér A, Deli MA. Lidocaine turns the surface charge of biological membranes more positive and changes the permeability of blood-brain barrier culture models. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2019; 1861:1579-1591. [PMID: 31301276 DOI: 10.1016/j.bbamem.2019.07.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 07/03/2019] [Accepted: 07/08/2019] [Indexed: 01/29/2023]
Abstract
The surface charge of brain endothelial cells forming the blood-brain barrier (BBB) is highly negative due to phospholipids in the plasma membrane and the glycocalyx. This negative charge is an important element of the defense systems of the BBB. Lidocaine, a cationic and lipophilic molecule which has anaesthetic and antiarrhytmic properties, exerts its actions by interacting with lipid membranes. Lidocaine when administered intravenously acts on vascular endothelial cells, but its direct effect on brain endothelial cells has not yet been studied. Our aim was to measure the effect of lidocaine on the charge of biological membranes and the barrier function of brain endothelial cells. We used the simplified membrane model, the bacteriorhodopsin (bR) containing purple membrane of Halobacterium salinarum and culture models of the BBB. We found that lidocaine turns the negative surface charge of purple membrane more positive and restores the function of the proton pump bR. Lidocaine also changed the zeta potential of brain endothelial cells in the same way. Short-term lidocaine treatment at a 10 μM therapeutically relevant concentration did not cause major BBB barrier dysfunction, substantial change in cell morphology or P-glycoprotein efflux pump inhibition. Lidocaine treatment decreased the flux of a cationic lipophilic molecule across the cell layer, but had no effect on the penetration of hydrophilic neutral or negatively charged markers. Our observations help to understand the biophysical background of the effect of lidocaine on biological membranes and draws the attention to the interaction of cationic drug molecules at the level of the BBB.
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Affiliation(s)
- Ana R Santa-Maria
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Temesvári krt. 62, H-6726 Szeged, Hungary; Doctoral School of Biology, University of Szeged, Hungary
| | - Fruzsina R Walter
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Temesvári krt. 62, H-6726 Szeged, Hungary
| | - Sándor Valkai
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Temesvári krt. 62, H-6726 Szeged, Hungary
| | - Ana Rita Brás
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Temesvári krt. 62, H-6726 Szeged, Hungary
| | - Mária Mészáros
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Temesvári krt. 62, H-6726 Szeged, Hungary; Doctoral School of Theoretical Medicine, University of Szeged, Hungary
| | - András Kincses
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Temesvári krt. 62, H-6726 Szeged, Hungary; Doctoral School of Multidisciplinary Medical Sciences, University of Szeged, Hungary
| | - Adrián Klepe
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Temesvári krt. 62, H-6726 Szeged, Hungary
| | - Diana Gaspar
- Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Lisboa, Portugal
| | - Miguel A R B Castanho
- Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Lisboa, Portugal
| | - László Zimányi
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Temesvári krt. 62, H-6726 Szeged, Hungary
| | - András Dér
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Temesvári krt. 62, H-6726 Szeged, Hungary.
| | - Mária A Deli
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Temesvári krt. 62, H-6726 Szeged, Hungary.
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Krekic S, Nagy D, Taneva SG, Fábián L, Zimányi L, Dér A. Spectrokinetic characterization of photoactive yellow protein films for integrated optical applications. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2019; 48:465-473. [PMID: 30905045 PMCID: PMC6647221 DOI: 10.1007/s00249-019-01353-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 02/19/2019] [Accepted: 03/04/2019] [Indexed: 11/02/2022]
Abstract
In this paper, the photocycle of the dried photoactive yellow protein film has been investigated in different humidity environments, in order to characterize its nonlinear optical properties for possible integrated optical applications. The light-induced spectral changes of the protein films were monitored by an optical multichannel analyser set-up, while the accompanying refractive index changes were measured with the optical waveguide lightmode spectroscopy method. To determine the number and kinetics of spectral intermediates in the photocycle, the absorption kinetic data were analysed by singular value decomposition and multiexponential fitting methods, whose results were used in a subsequent step of fitting a photocycle model to the data. The absorption signals of the films were found to be in strong correlation with the measured light-induced refractive index changes, whose size and kinetics imply that photoactive yellow protein may be a good alternative for utilization as an active nonlinear optical material in future integrated optical applications.
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Affiliation(s)
- Szilvia Krekic
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Temesvári krt. 62, P.O. Box 521, Szeged, 6701, Hungary.
| | - Dávid Nagy
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Temesvári krt. 62, P.O. Box 521, Szeged, 6701, Hungary
| | - Stefka G Taneva
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 21, Sofia, 1113, Bulgaria
| | - László Fábián
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Temesvári krt. 62, P.O. Box 521, Szeged, 6701, Hungary
| | - László Zimányi
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Temesvári krt. 62, P.O. Box 521, Szeged, 6701, Hungary
| | - András Dér
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Temesvári krt. 62, P.O. Box 521, Szeged, 6701, Hungary
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Násztor Z, Bogár F, Dér A. The interfacial tension concept, as revealed by fluctuations. Curr Opin Colloid Interface Sci 2016. [DOI: 10.1016/j.cocis.2016.05.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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9
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Maksimov EG, Shirshin EA, Sluchanko NN, Zlenko DV, Parshina EY, Tsoraev GV, Klementiev KE, Budylin GS, Schmitt FJ, Friedrich T, Fadeev VV, Paschenko VZ, Rubin AB. The Signaling State of Orange Carotenoid Protein. Biophys J 2016; 109:595-607. [PMID: 26244741 DOI: 10.1016/j.bpj.2015.06.052] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 06/01/2015] [Accepted: 06/25/2015] [Indexed: 10/23/2022] Open
Abstract
Orange carotenoid protein (OCP) is the photoactive protein that is responsible for high light tolerance in cyanobacteria. We studied the kinetics of the OCP photocycle by monitoring changes in its absorption spectrum, intrinsic fluorescence, and fluorescence of the Nile red dye bound to OCP. It was demonstrated that all of these three methods provide the same kinetic parameters of the photocycle, namely, the kinetics of OCP relaxation in darkness was biexponential with a ratio of two components equal to 2:1 independently of temperature. Whereas the changes of the absorption spectrum of OCP characterize the geometry and environment of its chromophore, the intrinsic fluorescence of OCP reveals changes in its tertiary structure, and the fluorescence properties of Nile red indicate the exposure of hydrophobic surface areas of OCP to the solvent following the photocycle. The results of molecular-dynamics studies indicated the presence of two metastable conformations of 3'-hydroxyechinenone, which is consistent with characteristic changes in the Raman spectra. We conclude that rotation of the β-ionylidene ring in the C-terminal domain of OCP could be one of the first conformational rearrangements that occur during photoactivation. The obtained results suggest that the photoactivated form of OCP represents a molten globule-like state that is characterized by increased mobility of tertiary structure elements and solvent accessibility.
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Affiliation(s)
- Eugene G Maksimov
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia.
| | - Evgeny A Shirshin
- Department of Quantum Electronics, Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia
| | - Dmitry V Zlenko
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Evgenia Y Parshina
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Georgy V Tsoraev
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Konstantin E Klementiev
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Gleb S Budylin
- Department of Quantum Electronics, Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Franz-Josef Schmitt
- Institute of Chemistry, Max-Volmer Laboratory of Biophysical Chemistry, Technical University Berlin, Berlin, Germany
| | - Thomas Friedrich
- Institute of Chemistry, Max-Volmer Laboratory of Biophysical Chemistry, Technical University Berlin, Berlin, Germany
| | - Victor V Fadeev
- Department of Quantum Electronics, Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Vladimir Z Paschenko
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Andrew B Rubin
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
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Liu L, Cui G, Fang WH. Excited States and Photochemistry of Chromophores in the Photoactive Proteins Explored by the Combined Quantum Mechanical and Molecular Mechanical Calculations. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2015; 100:255-84. [PMID: 26415847 DOI: 10.1016/bs.apcsb.2015.07.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A photoactive protein usually contains a unique chromophore that is responsible for the initial photoresponse and functions of the photoactive protein are determined by the interaction between the chromophore and its protein surroundings. The combined quantum mechanical and molecular mechanical (QM/MM) approach is demonstrated to be a very useful tool for exploring structures and functions of a photoactive protein with the chromophore and its protein surroundings treated by the QM and MM methods, respectively. In this review, we summarize the basic formulas of the QM/MM approach and emphasize its applications to excited states and photoreactions of chromophores in rhodopsin protein, photoactive yellow protein, and green fluorescent protein.
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Affiliation(s)
- Lihong Liu
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, China.
| | - Ganglong Cui
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, China
| | - Wei-Hai Fang
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, China
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11
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King JD, Liu H, He G, Orf GS, Blankenship RE. Chemical activation of the cyanobacterial orange carotenoid protein. FEBS Lett 2014; 588:4561-5. [DOI: 10.1016/j.febslet.2014.10.024] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Revised: 10/20/2014] [Accepted: 10/22/2014] [Indexed: 11/29/2022]
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12
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Wei L, Wang H, Chen X, Fang W, Wang H. A comprehensive study of isomerization and protonation reactions in the photocycle of the photoactive yellow protein. Phys Chem Chem Phys 2014; 16:25263-72. [DOI: 10.1039/c4cp03495c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A comprehensive picture of the overall photocycle was obtained to reveal a wide range of structural signals in the photoactive yellow protein.
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Affiliation(s)
- Lili Wei
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education
- Department of Chemistry
- Beijing Normal University
- Beijing, China
| | - Hongjuan Wang
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education
- Department of Chemistry
- Beijing Normal University
- Beijing, China
| | - Xuebo Chen
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education
- Department of Chemistry
- Beijing Normal University
- Beijing, China
| | - Weihai Fang
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education
- Department of Chemistry
- Beijing Normal University
- Beijing, China
| | - Haobin Wang
- Department of Chemistry and Biochemistry
- New Mexico State University
- Las Cruces, USA
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13
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Hofmeister ions control protein dynamics. Biochim Biophys Acta Gen Subj 2013; 1830:4564-72. [DOI: 10.1016/j.bbagen.2013.05.036] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Revised: 05/24/2013] [Accepted: 05/28/2013] [Indexed: 11/19/2022]
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