1
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Hao JF, Yamano N, Qi CH, Zhang Y, Ma F, Wang P, Yu LJ, Zhang JP. Carotenoid-Mediated Long-Range Energy Transfer in the Light Harvesting-Reaction Center Complex from Photosynthetic Bacterium Roseiflexus castenholzii. J Phys Chem B 2023; 127:10360-10369. [PMID: 37983555 DOI: 10.1021/acs.jpcb.3c07087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
The light harvesting-reaction center complex (LH-RC) of Roseiflexus castenholzii binds bacteriochlorophylls a (BChls a), B800 and B880, absorbing around 800 and 880 nm, respectively. We comparatively investigated the interband excitation energy transfer (EET) dynamics of the wild-type LH-RC (wt-LH-RC) of Rfl. castenholzii and its carotenoid (Car)-less mutant (m-LH-RC) and found that Car can boost the B800 → B880 EET rate from (2.43 ps)-1 to (1.75 ps)-1, accounting for 38% acceleration of the EET process. Interestingly, photoexcitation of wt-LH-RC at 800 nm induced pronounced excitation dynamics of Car despite the insufficient photon energy for direct Car excitation, a phenomenon which is attributed to the BChl-Car exciplex 1[B800(↑↑)···Car(↓↓)]*. Such an exciplex is suggested to play an essential role in promoting the B800 → B880 EET process, as corroborated by the recently reported cryo-EM structures of wt-LH-RC and m-LH-RC. The mechanism of Car-mediated EET will be helpful to deepen the understanding of the role of Car in bacterial photosynthesis.
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Affiliation(s)
- Jin-Fang Hao
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing 100872, P. R. China
| | - Nami Yamano
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing 100872, P. R. China
| | - Chen-Hui Qi
- Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, P. R. China
| | - Yan Zhang
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing 100872, P. R. China
| | - Fei Ma
- Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, P. R. China
| | - Peng Wang
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing 100872, P. R. China
| | - Long-Jiang Yu
- Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, P. R. China
| | - Jian-Ping Zhang
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing 100872, P. R. China
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2
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Müller C, Pascher T, Eriksson A, Chabera P, Uhlig J. KiMoPack: A python Package for Kinetic Modeling of the Chemical Mechanism. J Phys Chem A 2022; 126:4087-4099. [PMID: 35700393 PMCID: PMC9251768 DOI: 10.1021/acs.jpca.2c00907] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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Herein, we present
KiMoPack, an analysis tool for the kinetic modeling of transient spectroscopic data. KiMoPack
enables a state-of-the-art analysis routine including data preprocessing
and standard fitting (global analysis), as well as fitting of complex
(target) kinetic models, interactive viewing of (fit) results, and
multiexperiment analysis via user accessible functions and a graphical
user interface (GUI) enhanced interface. To facilitate its use, this
paper guides the user through typical operations covering a wide range
of analysis tasks, establishes a typical workflow and is bridging
the gap between ease of use for less experienced users and introducing
the advanced interfaces for experienced users. KiMoPack is open source
and provides a comprehensive front-end for preprocessing, fitting
and plotting of 2-dimensional data that simplifies the access to a
powerful python-based data-processing system
and forms the foundation for a well documented, reliable, and reproducible
data analysis.
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Affiliation(s)
- Carolin Müller
- Institute for Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany.,Leibniz Institute of Photonic Technology (IPHT) Jena, Albert-Einstein-Strasse 9, 07745 Jena, Germany
| | - Torbjörn Pascher
- Department of Chemical Physics, Lund University, SE-22100 Lund, Sweden
| | - Axl Eriksson
- Department of Chemical Physics, Lund University, SE-22100 Lund, Sweden
| | - Pavel Chabera
- Department of Chemical Physics, Lund University, SE-22100 Lund, Sweden
| | - Jens Uhlig
- Department of Chemical Physics, Lund University, SE-22100 Lund, Sweden
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3
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Ravensbergen J, Pillai S, Méndez-Hernández DD, Frese RN, van Grondelle R, Gust D, Moore TA, Moore AL, Kennis JTM. Dual Singlet Excited-State Quenching Mechanisms in an Artificial Caroteno-Phthalocyanine Light Harvesting Antenna. ACS PHYSICAL CHEMISTRY AU 2022; 2:59-67. [PMID: 35098245 PMCID: PMC8796278 DOI: 10.1021/acsphyschemau.1c00008] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 09/29/2021] [Accepted: 09/29/2021] [Indexed: 11/29/2022]
Abstract
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Under excess illumination,
photosystem II of plants dissipates
excess energy through the quenching of chlorophyll fluorescence in
the light harvesting antenna. Various models involving chlorophyll
quenching by carotenoids have been proposed, including (i) direct
energy transfer from chlorophyll to the low-lying optically forbidden
carotenoid S1 state, (ii) formation of a collective quenched
chlorophyll–carotenoid S1 excitonic state, (iii)
chlorophyll–carotenoid charge separation and recombination,
and (iv) chlorophyll–chlorophyll charge separation and recombination.
In previous work, the first three processes were mimicked in model
systems: in a Zn-phthalocyanine–carotenoid dyad with an amide
linker, direct energy transfer was observed by femtosecond transient
absorption spectroscopy, whereas in a Zn-phthalocyanine–carotenoid
dyad with an amine linker excitonic quenching was demonstrated. Here,
we present a transient absorption spectroscopic study on a Zn-phthalocyanine–carotenoid
dyad with a phenylene linker. We observe that two quenching phases
of the phthalocyanine excited state exist at 77 and 213 ps in addition
to an unquenched phase at 2.7 ns. Within our instrument response of
∼100 fs, carotenoid S1 features rise which point
at an excitonic quenching mechanism. Strikingly, we observe an additional
rise of carotenoid S1 features at 3.6 ps, which shows that
a direct energy transfer mechanism in an inverted kinetics regime
is also in effect. We assign the 77 ps decay component to excitonic
quenching and the 3.6 ps/213 ps rise and decay components to direct
energy transfer. Our results indicate that dual quenching mechanisms
may be active in the same molecular system, in addition to an unquenched
fraction. Computational chemistry results indicate the presence of
multiple conformers where one of the dihedral angles of the phenylene
linker assumes distinct values. We propose that the parallel quenching
pathways and the unquenched fraction result from such conformational
subpopulations. Our results suggest that it is possible to switch
between different regimes of quenching and nonquenching through a
conformational change on the same molecule, offering insights into
potential mechanisms used in biological photosynthesis to adapt to
light intensity changes on fast time scales.
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Affiliation(s)
- Janneke Ravensbergen
- Department of Physics and Astronomy, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Smitha Pillai
- School of Molecular Sciences and Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1605, United States
| | | | - Raoul N. Frese
- Department of Physics and Astronomy, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Rienk van Grondelle
- Department of Physics and Astronomy, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Devens Gust
- School of Molecular Sciences and Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1605, United States
| | - Thomas A. Moore
- School of Molecular Sciences and Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1605, United States
| | - Ana L. Moore
- School of Molecular Sciences and Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1605, United States
| | - John T. M. Kennis
- Department of Physics and Astronomy, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
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4
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Gacek DA, Betke A, Nowak J, Lokstein H, Walla PJ. Two-photon absorption and excitation spectroscopy of carotenoids, chlorophylls and pigment-protein complexes. Phys Chem Chem Phys 2021; 23:8731-8738. [PMID: 33876032 DOI: 10.1039/d1cp00656h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In addition to (bacterio)chlorophylls, (B)Chls, photosynthetic pigment-protein complexes bind carotenoids (Cars) that fulfil various important functions which are not fully understood, yet. However, certain excited states of Cars are optically one-photon forbidden ("dark") and can potentially undergo excitation energy transfer (EET) to (B)Chls following two-photon absorption (TPA). The amount of EET is reflected by the differences in TPA and two-photon excitation (TPE) spectra of a complex (multi-pigment) system. Since it is technically and analytically demanding to resolve optically forbidden states, different studies reported varying contributions of Cars and Chls to TPE/TPA spectra. In a study using well-defined 1 : 1 Car-tetrapyrrole dyads TPE contributions of tetrapyrrole molecules, including Chls, and Cars were measured. In these experiments, TPE of Cars dominated over Chl a TPE in a broad wavelength range. Another study suggested only minor contributions of Cars to TPE spectra of pigment-protein complexes such as the plant main light-harvesting complex (LHCII), in particular for wavelengths longer than ∼600/1200 nm. By joining forces and a combined analysis of all available data by both teams, we try to resolve this apparent contradiction. Here, we demonstrate that reconstruction of a wide spectral range of TPE for LHCII and photosystem I (PSI) requires both, significant Car and Chl contributions. Direct comparison of TPE spectra obtained in both studies demonstrates a good agreement of the primary data. We conclude that in TPE spectra of LHCII and PSI, the contribution of Chls is dominating above 600/1200 nm, whereas the contributions of forbidden Car states increase particularly at wavelengths shorter than 600/1200 nm. Estimates of Car contributions to TPA as well as TPE spectra are given for various wavelengths.
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Affiliation(s)
- Daniel A Gacek
- Technische Universität Braunschweig, Institute for Physical and Theoretical Chemistry, Department for Biophysical Chemistry, Gaußstr. 17, 38106 Braunschweig, Germany.
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5
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Ghosh A, Ghosh S, Ghosh G, Patra A. Implications of relaxation dynamics of collapsed conjugated polymeric nanoparticles for light-harvesting applications. Phys Chem Chem Phys 2021; 23:14549-14563. [DOI: 10.1039/d1cp01618k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The mechanism of the formation of nanoparticles (collapsed state) from the extended state of polymers and their ultrafast excited state relaxation dynamics are illustrated.
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Affiliation(s)
- Arnab Ghosh
- School of Materials Sciences
- Indian Association for the Cultivation of Science
- Kolkata 700032
- India
| | - Srijon Ghosh
- School of Materials Sciences
- Indian Association for the Cultivation of Science
- Kolkata 700032
- India
| | - Goutam Ghosh
- School of Materials Sciences
- Indian Association for the Cultivation of Science
- Kolkata 700032
- India
| | - Amitava Patra
- School of Materials Sciences
- Indian Association for the Cultivation of Science
- Kolkata 700032
- India
- Institute of Nano Science and Technology
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6
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Konold PE, van Stokkum IHM, Muzzopappa F, Wilson A, Groot ML, Kirilovsky D, Kennis JTM. Photoactivation Mechanism, Timing of Protein Secondary Structure Dynamics and Carotenoid Translocation in the Orange Carotenoid Protein. J Am Chem Soc 2019; 141:520-530. [PMID: 30511841 PMCID: PMC6331140 DOI: 10.1021/jacs.8b11373] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Indexed: 01/10/2023]
Abstract
The orange carotenoid protein (OCP) is a two-domain photoactive protein that noncovalently binds an echinenone (ECN) carotenoid and mediates photoprotection in cyanobacteria. In the dark, OCP assumes an orange, inactive state known as OCPO; blue light illumination results in the red active state, known as OCPR. The OCPR state is characterized by large-scale structural changes that involve dissociation and separation of C-terminal and N-terminal domains accompanied by carotenoid translocation into the N-terminal domain. The mechanistic and dynamic-structural relations between photon absorption and formation of the OCPR state have remained largely unknown. Here, we employ a combination of time-resolved UV-visible and (polarized) mid-infrared spectroscopy to assess the electronic and structural dynamics of the carotenoid and the protein secondary structure, from femtoseconds to 0.5 ms. We identify a hereto unidentified carotenoid excited state in OCP, the so-called S* state, which we propose to play a key role in breaking conserved hydrogen-bond interactions between carotenoid and aromatic amino acids in the binding pocket. We arrive at a comprehensive reaction model where the hydrogen-bond rupture with conserved aromatic side chains at the carotenoid β1-ring in picoseconds occurs at a low yield of <1%, whereby the β1-ring retains a trans configuration with respect to the conjugated π-electron chain. This event initiates structural changes at the N-terminal domain in 1 μs, which allow the carotenoid to translocate into the N-terminal domain in 10 μs. We identified infrared signatures of helical elements that dock on the C-terminal domain β-sheet in the dark and unfold in the light to allow domain separation. These helical elements do not move within the experimental range of 0.5 ms, indicating that domain separation occurs on longer time scales, lagging carotenoid translocation by at least 2 decades of time.
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Affiliation(s)
- Patrick E. Konold
- Department of Physics
and Astronomy, Faculty of Sciences, Vrije
Universiteit, De Boelelaan
1081, 1081HV Amsterdam, The Netherlands
| | - Ivo H. M. van Stokkum
- Department of Physics
and Astronomy, Faculty of Sciences, Vrije
Universiteit, De Boelelaan
1081, 1081HV Amsterdam, The Netherlands
| | - Fernando Muzzopappa
- Institute for Integrative Biology of the
Cell (I2BC), CEA, CNRS, Universite Paris-Sud,
Universite Paris-Saclay, 91198 Gif-sur-Yvette, France
- Institut Joliot, Commissariat a l’Energie
Atomique (CEA), 91191 Gif-sur-Yvette, France
| | - Adjélé Wilson
- Institute for Integrative Biology of the
Cell (I2BC), CEA, CNRS, Universite Paris-Sud,
Universite Paris-Saclay, 91198 Gif-sur-Yvette, France
- Institut Joliot, Commissariat a l’Energie
Atomique (CEA), 91191 Gif-sur-Yvette, France
| | - Marie-Louise Groot
- Department of Physics
and Astronomy, Faculty of Sciences, Vrije
Universiteit, De Boelelaan
1081, 1081HV Amsterdam, The Netherlands
| | - Diana Kirilovsky
- Institute for Integrative Biology of the
Cell (I2BC), CEA, CNRS, Universite Paris-Sud,
Universite Paris-Saclay, 91198 Gif-sur-Yvette, France
- Institut Joliot, Commissariat a l’Energie
Atomique (CEA), 91191 Gif-sur-Yvette, France
| | - John T. M. Kennis
- Department of Physics
and Astronomy, Faculty of Sciences, Vrije
Universiteit, De Boelelaan
1081, 1081HV Amsterdam, The Netherlands
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7
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Tejeda-Ferrari ME, Brown CL, Coutinho GCCC, Gomes de Sá GA, Palma JL, Llansola-Portoles MJ, Kodis G, Mujica V, Ho J, Gust D, Moore TA, Moore AL. Electronic Structure and Triplet-Triplet Energy Transfer in Artificial Photosynthetic Antennas. Photochem Photobiol 2018; 95:211-219. [DOI: 10.1111/php.12979] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 06/28/2018] [Indexed: 01/21/2023]
Affiliation(s)
| | - Chelsea L. Brown
- School of Molecular Sciences; Arizona State University; Tempe AZ
| | | | | | - Julio L. Palma
- Department of Chemistry; The Pennsylvania State University; Lemont Furnace PA
| | - Manuel J. Llansola-Portoles
- Institute for Integrative Biology of the Cell (I2BC); CEA; CNRS; Université Paris-Saclay; Gif-sur-Yvette Cedex France
| | - Gerdenis Kodis
- School of Molecular Sciences; Arizona State University; Tempe AZ
| | - Vladimiro Mujica
- School of Molecular Sciences; Arizona State University; Tempe AZ
| | - Junming Ho
- School of Chemistry; University of New South Wales; Sydney NSW Australia
| | - Devens Gust
- School of Molecular Sciences; Arizona State University; Tempe AZ
| | - Thomas A. Moore
- School of Molecular Sciences; Arizona State University; Tempe AZ
| | - Ana L. Moore
- School of Molecular Sciences; Arizona State University; Tempe AZ
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8
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Gacek DA, Moore AL, Moore TA, Walla PJ. Two-Photon Spectra of Chlorophylls and Carotenoid–Tetrapyrrole Dyads. J Phys Chem B 2017; 121:10055-10063. [DOI: 10.1021/acs.jpcb.7b08502] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daniel A. Gacek
- Technische Universität Braunschweig, Institute for Physical and Theoretical Chemistry, Department of Biophysical
Chemistry, Gaußstraße.
17, 38106 Braunschweig, Germany
| | - Ana L. Moore
- School
of Molecular Sciences and Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Thomas A. Moore
- School
of Molecular Sciences and Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Peter Jomo Walla
- Technische Universität Braunschweig, Institute for Physical and Theoretical Chemistry, Department of Biophysical
Chemistry, Gaußstraße.
17, 38106 Braunschweig, Germany
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9
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Llansola-Portoles MJ, Gust D, Moore TA, Moore AL. Artificial photosynthetic antennas and reaction centers. CR CHIM 2017. [DOI: 10.1016/j.crci.2016.05.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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10
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Zhu H, Li Y, Chen J, Zhou M, Niu Y, Zhang X, Guo Q, Wang S, Yang G, Xia A. Excited-State Deactivation of Branched Phthalocyanine Compounds. Chemphyschem 2015; 16:3893-901. [DOI: 10.1002/cphc.201500738] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Revised: 09/29/2015] [Indexed: 01/22/2023]
Affiliation(s)
- Huaning Zhu
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
| | - Yang Li
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
| | - Jun Chen
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
- School of Materials Science and Engineering; Jiangxi University of Science and Technology; Ganzhou 341000 China
| | - Meng Zhou
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
| | - Yingli Niu
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
| | - Xinxing Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
| | - Qianjin Guo
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
| | - Shuangqing Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
| | - Guoqiang Yang
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
| | - Andong Xia
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
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11
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Samanta PN, Das KK. Structural and electronic properties of covalently functionalized 2-aminoethoxy-metallophthalocyanine–graphene hybrid materials: a computational study. RSC Adv 2015. [DOI: 10.1039/c5ra14628c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
A computational study has been made on graphene based hybrid complexes formed by the covalent grafting of 2-aminoethoxy-metallophthalocyanine on a graphene sheet.
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Affiliation(s)
| | - Kalyan Kumar Das
- Department of Chemistry
- Physical Chemistry Section
- Jadavpur University
- Kolkata 700 032
- India
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12
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Álvarez R, Vaz B, Gronemeyer H, de Lera ÁR. Functions, therapeutic applications, and synthesis of retinoids and carotenoids. Chem Rev 2013; 114:1-125. [PMID: 24266866 DOI: 10.1021/cr400126u] [Citation(s) in RCA: 151] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Rosana Álvarez
- Departamento de Química Orgánica, Centro de Investigación Biomédica (CINBIO), and Instituto de Investigación Biomédica de Vigo (IBIV), Universidade de Vigo , 36310 Vigo, Spain
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13
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Maiuri M, Snellenburg JJ, van Stokkum IHM, Pillai S, WongCarter K, Gust D, Moore TA, Moore AL, van Grondelle R, Cerullo G, Polli D. Ultrafast Energy Transfer and Excited State Coupling in an Artificial Photosynthetic Antenna. J Phys Chem B 2013; 117:14183-90. [DOI: 10.1021/jp401073w] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Maiuri
- IFN-CNR, Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci, 32, 20133 Milano, Italy
| | - J. J. Snellenburg
- Department of Physics
and Astronomy, VU University Amsterdam, De Boelelaan 1081, 1081HV Amsterdam, The Netherlands
| | - I. H. M. van Stokkum
- Department of Physics
and Astronomy, VU University Amsterdam, De Boelelaan 1081, 1081HV Amsterdam, The Netherlands
| | - S. Pillai
- Department of Chemistry & Biochemistry and The Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1605, United States
| | - K. WongCarter
- Department of Chemistry & Biochemistry and The Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1605, United States
| | - D. Gust
- Department of Chemistry & Biochemistry and The Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1605, United States
| | - T. A. Moore
- Department of Chemistry & Biochemistry and The Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1605, United States
| | - A. L. Moore
- Department of Chemistry & Biochemistry and The Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1605, United States
| | - R. van Grondelle
- Department of Physics
and Astronomy, VU University Amsterdam, De Boelelaan 1081, 1081HV Amsterdam, The Netherlands
| | - G. Cerullo
- IFN-CNR, Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci, 32, 20133 Milano, Italy
| | - D. Polli
- IFN-CNR, Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci, 32, 20133 Milano, Italy
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14
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Berera R, Gwizdala M, van Stokkum IHM, Kirilovsky D, van Grondelle R. Excited States of the Inactive and Active Forms of the Orange Carotenoid Protein. J Phys Chem B 2013; 117:9121-8. [DOI: 10.1021/jp307420p] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rudi Berera
- Division of Physics and Astronomy, Department of Biophysics, VU University, Amsterdam, The Netherlands
| | - Michal Gwizdala
- Commissariat a l’Energie Atomique, Institute de Biologie et Tecnologie de Saclay
- Centre National de la Recherce Scientifique, 91191 Gif sur Yvette, France
| | - Ivo H. M. van Stokkum
- Division of Physics and Astronomy, Department of Biophysics, VU University, Amsterdam, The Netherlands
| | - Diana Kirilovsky
- Commissariat a l’Energie Atomique, Institute de Biologie et Tecnologie de Saclay
- Centre National de la Recherce Scientifique, 91191 Gif sur Yvette, France
| | - Rienk van Grondelle
- Division of Physics and Astronomy, Department of Biophysics, VU University, Amsterdam, The Netherlands
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15
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Vengris M, Larsen DS, Valkunas L, Kodis G, Herrero C, Gust D, Moore T, Moore A, van Grondelle R. Separating annihilation and excitation energy transfer dynamics in light harvesting systems. J Phys Chem B 2013; 117:11372-82. [PMID: 23662680 DOI: 10.1021/jp403301c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The dependence of excitation energy transfer kinetics on the electronic state of the acceptor (ground vs excited) has been resolved with a novel multipulse prePump-Pump-Probe spectroscopy. The primary energy transfer and annihilation dynamics in two model light-harvesting systems were explored: an artificially synthesized carotenoid-zinc-phthalocyanine dyad and a naturally occurring light-harvesting peridinin-chlorophyll protein complex from Amphidinium carterae. Both systems use carotenoid as the primary excitation energy donor with porphyrin chromophores as the acceptor molecules. The prePump-Pump-Probe transient signals were analyzed with Monte Carlo modeling to explicitly address the underlying step-by-step kinetics involved in both excitation migration and annihilation processes. Both energy transfer and annihilation dynamics were demonstrated to occur with approximately the same rate in both systems, regardless of the excitation status of the acceptor pigments. The possible reasons for these observations are discussed in the framework of the Förster energy transfer model.
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Affiliation(s)
- Mikas Vengris
- Quantum Electronics Department, Faculty of Physics, Vilnius University , Saulėtekio 9-III, 10222 Vilnius, Lithuania
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16
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Hauer J, Maiuri M, Viola D, Lukes V, Henry S, Carey AM, Cogdell RJ, Cerullo G, Polli D. Explaining the temperature dependence of spirilloxanthin's S* signal by an inhomogeneous ground state model. J Phys Chem A 2013; 117:6303-10. [PMID: 23577754 PMCID: PMC3725610 DOI: 10.1021/jp4011372] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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We
investigate the nature of the S* excited state in carotenoids by performing
a series of pump–probe experiments with sub-20 fs time resolution
on spirilloxanthin in a polymethyl-methacrylate matrix varying the
sample temperature. Following photoexcitation, we observe sub-200
fs internal conversion of the bright S2 state into the
lower-lying S1 and S* states, which in turn relax to the
ground state on a picosecond time scale. Upon cooling down the sample
to 77 K, we observe a systematic decrease of the S*/S1 ratio.
This result can be explained by assuming two thermally populated ground
state isomers. The higher lying one generates the S* state, which
can then be effectively frozen out by cooling. These findings are
supported by quantum chemical modeling and provide strong evidence
for the existence and importance of ground state isomers in the photophysics
of carotenoids.
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Affiliation(s)
- J Hauer
- Photonics Institute, Vienna University of Technology, Gusshausstrasse 27, 1040 Vienna, Austria
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17
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Garg V, Kodis G, Liddell PA, Terazono Y, Moore TA, Moore AL, Gust D. Artificial Photosynthetic Reaction Center with a Coumarin-Based Antenna System. J Phys Chem B 2013; 117:11299-308. [DOI: 10.1021/jp402265e] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Vikas Garg
- Department of Chemistry and Biochemistry, Center for
Bio-Inspired Solar Fuel Production, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Gerdenis Kodis
- Department of Chemistry and Biochemistry, Center for
Bio-Inspired Solar Fuel Production, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Paul A. Liddell
- Department of Chemistry and Biochemistry, Center for
Bio-Inspired Solar Fuel Production, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Yuichi Terazono
- Department of Chemistry and Biochemistry, Center for
Bio-Inspired Solar Fuel Production, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Thomas A. Moore
- Department of Chemistry and Biochemistry, Center for
Bio-Inspired Solar Fuel Production, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Ana L. Moore
- Department of Chemistry and Biochemistry, Center for
Bio-Inspired Solar Fuel Production, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Devens Gust
- Department of Chemistry and Biochemistry, Center for
Bio-Inspired Solar Fuel Production, Arizona State University, Tempe, Arizona 85287-1604, United States
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18
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Pillai S, Ravensbergen J, Antoniuk-Pablant A, Sherman BD, van Grondelle R, Frese RN, Moore TA, Gust D, Moore AL, Kennis JTM. Carotenoids as electron or excited-state energy donors in artificial photosynthesis: an ultrafast investigation of a carotenoporphyrin and a carotenofullerene dyad. Phys Chem Chem Phys 2013; 15:4775-84. [DOI: 10.1039/c3cp50364j] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Ogbodu RO, Antunes E, Nyokong T. Physicochemical properties of a zinc phthalocyanine – pyrene conjugate adsorbed onto single walled carbon nanotubes. Dalton Trans 2013; 42:10769-77. [DOI: 10.1039/c3dt50335f] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Kosumi D, Maruta S, Horibe T, Nagaoka Y, Fujii R, Sugisaki M, Cogdell RJ, Hashimoto H. Ultrafast excited state dynamics of spirilloxanthin in solution and bound to core antenna complexes: Identification of the S* and T1 states. J Chem Phys 2012; 137:064505. [DOI: 10.1063/1.4737129] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Yushchenko DA, Zhang M, Yan Q, Waggoner AS, Bruchez MP. Genetically targetable and color-switching fluorescent probe. Chembiochem 2012; 13:1564-8. [PMID: 22777954 DOI: 10.1002/cbic.201200334] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Indexed: 11/10/2022]
Abstract
Color bind: We have developed a probe TMR-para-MG that switches its fluorescence emission upon binding to a fluorogen-activating protein (FAP). In cells that express FAP, this dye labels target sites in one color and mitochondria in another color, thus it might be a suitable tool for monitoring changes in mitochondrial membrane potential.
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Affiliation(s)
- Dmytro A Yushchenko
- Molecular Biosensor and Imaging Center, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA.
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22
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Orian L, Carlotto S, Di Valentin M, Polimeno A. Charge Transfer in Model Bioinspired Carotene–Porphyrin Dyads. J Phys Chem A 2012; 116:3926-33. [DOI: 10.1021/jp212434t] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Laura Orian
- Dipartimento
di Scienze Chimiche, Università degli Studi di Padova Via Marzolo 1, 35131 Padova, Italy
| | - Silvia Carlotto
- Dipartimento
di Scienze Chimiche, Università degli Studi di Padova Via Marzolo 1, 35131 Padova, Italy
| | - Marilena Di Valentin
- Dipartimento
di Scienze Chimiche, Università degli Studi di Padova Via Marzolo 1, 35131 Padova, Italy
| | - Antonino Polimeno
- Dipartimento
di Scienze Chimiche, Università degli Studi di Padova Via Marzolo 1, 35131 Padova, Italy
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23
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Liao PN, Pillai S, Kloz M, Gust D, Moore AL, Moore TA, Kennis JTM, van Grondelle R, Walla PJ. On the role of excitonic interactions in carotenoid-phthalocyanine dyads and implications for photosynthetic regulation. PHOTOSYNTHESIS RESEARCH 2012; 111:237-243. [PMID: 21948493 DOI: 10.1007/s11120-011-9690-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Accepted: 09/07/2011] [Indexed: 05/31/2023]
Abstract
In two recent studies, energy transfer was reported in certain phthalocyanine-carotenoid dyads between the optically forbidden first excited state of carotenoids (Car S(1)) and phthalocyanines (Pcs) in the direction Pc → Car S(1) (Kloz et al., J Am Chem Soc 133:7007-7015, 2011) as well as in the direction Car S(1) → Pc (Liao et al., J Phys Chem A 115:4082-4091, 2011). In this article, we show that the extent of this energy transfer in both directions is closely correlated in these dyads. This correlation and the additional observation that Car S(1) is instantaneously populated after Pc excitation provides evidence that in these compounds excitonic interactions can occur. Besides pure energy transfer and electron transfer, this is the third type of tetrapyrrole-carotenoid interaction that has been shown to occur in these model compounds and that has previously been proposed as a photosynthetic regulation mechanism. We discuss the implications of these models for photosynthetic regulation. The findings are also discussed in the context of a model in which both electronic states are disordered and in which the strength of the electronic coupling determines whether energy transfer, excitonic coupling, or electron transfer occurs.
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Affiliation(s)
- Pen-Nan Liao
- Department for Biophysical Chemistry, Institute for Physical and Theoretical Chemistry, Technische Universität Braunschweig, Hans-Sommer-Strasse 10, 38106, Braunschweig, Germany
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24
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Kloz M, Pillai S, Kodis G, Gust D, Moore TA, Moore AL, Grondelle RV, Kennis JTM. New light-harvesting roles of hot and forbidden carotenoid states in artificial photosynthetic constructs. Chem Sci 2012. [DOI: 10.1039/c2sc01023b] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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25
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Wahadoszamen M, Berera R, Ara AM, Romero E, van Grondelle R. Identification of two emitting sites in the dissipative state of the major light harvesting antenna. Phys Chem Chem Phys 2011; 14:759-66. [PMID: 22120671 DOI: 10.1039/c1cp23059j] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In order to cope with the deleterious effects of excess light, photosynthetic organisms have developed remarkable strategies where the excess energy is dissipated as heat by the antenna system. In higher plants one main player in the process is the major light harvesting antenna of Photosystem II (PSII), LHCII. In this paper we applied Stark fluorescence spectroscopy to LHCII in different quenching states to investigate the possible contribution of charge-transfer states to the quenching. We find that in the quenched state the fluorescence displays a remarkable sensitivity to the applied electric field. The resulting field-induced emission spectra reveal the presence of two distinct energy dissipating sites both characterized by a strong but spectrally very different response to the applied electric field. We propose the two states to originate from chlorophyll-chlorophyll and chlorophyll-carotenoid charge transfer interactions coupled to the chlorophyll exciton state in the terminal emitter locus and discuss these findings in the light of the different models proposed to be responsible for energy dissipation in photosynthesis.
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Affiliation(s)
- Md Wahadoszamen
- Division of Physics and Astronomy, Department of Biophysics, VU University Amsterdam, Amsterdam, The Netherlands.
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26
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Jiménez AJ, Marcos ML, Hausmann A, Rodríguez-Morgade MS, Guldi DM, Torres T. Assembling Phthalocyanine Dimers through a Platinum(II) Acetylide Linker. Chemistry 2011; 17:14139-46. [DOI: 10.1002/chem.201101791] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2011] [Indexed: 11/11/2022]
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27
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Mathes T, van Stokkum IHM, Bonetti C, Hegemann P, Kennis JTM. The Hydrogen-Bond Switch Reaction of the Blrb Bluf Domain of Rhodobacter sphaeroides. J Phys Chem B 2011; 115:7963-71. [DOI: 10.1021/jp201296m] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Tilo Mathes
- Institut für Biologie/Experimentelle Biophysik, Humboldt Universität zu Berlin, Invalidenstrasse 42, D-10115 Berlin, Germany
| | - Ivo H. M. van Stokkum
- Biophysics Group, Department of Physics and Astronomy, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV, Amsterdam, The Netherlands
| | - Cosimo Bonetti
- Biophysics Group, Department of Physics and Astronomy, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV, Amsterdam, The Netherlands
| | - Peter Hegemann
- Institut für Biologie/Experimentelle Biophysik, Humboldt Universität zu Berlin, Invalidenstrasse 42, D-10115 Berlin, Germany
| | - John T. M. Kennis
- Biophysics Group, Department of Physics and Astronomy, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV, Amsterdam, The Netherlands
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28
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Toh KC, Stojković EA, van Stokkum IHM, Moffat K, Kennis JTM. Fluorescence quantum yield and photochemistry of bacteriophytochrome constructs. Phys Chem Chem Phys 2011; 13:11985-97. [PMID: 21611667 DOI: 10.1039/c1cp00050k] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Bacteriophytochromes (Bphs) are red-light photoreceptor proteins with a photosensory core that consists of three distinct domains, PAS, GAF and PHY, and covalently binds biliverdin (BV) to a conserved cysteine in the PAS domain. In a recent development, PAS-GAF variants were engineered for use as a near-infrared fluorescent marker in mammalian tissues (Tsien and co-workers, Science, 2009, 324, 804-807). Here, we report the fluorescence quantum yield and photochemistry of two highly-related Bphs from Rps. palustris, RpBphP2 (P2) and RpBphP3 (P3) with distinct photoconversion and fluorescence properties. We applied ultrafast spectroscopy to wild type P3 and P2 PAS-GAF proteins and their P3 D216A, Y272F and P2 D202A PAS-GAF-PHY mutant proteins. In these mutants hydrogen-bond interactions between a conserved aspartate (Asp) which connects the BV chromophore with the PHY domains are disrupted. The excited-state lifetime of the truncated P3 and P2 PAS-GAF proteins was significantly longer than in their PAS-GAF-PHY counterparts that constitute the full photosensory core. Mutation of the conserved Asp to Ala in the PAS-GAF-PHY protein had a similar but larger effect. The fluorescence quantum yields of the P3 D216A and Y272F mutants were 0.066, higher than that of wild type P3 (0.043) and similar to the engineered Bph of Tsien and co-workers. We conclude that elimination of a key hydrogen-bond interaction between Asp and a conserved Arg in the PHY domain is responsible for the excited-state lifetime increase in all Bph variants studied here. H/D exchange resulted in a 1.4-1.7 fold increase of excited-state lifetime. The results support a reaction model in which deactivation of the BV chromophore proceeds via excited-state proton transfer from the BV pyrrole nitrogens to the backbone of the conserved Asp or to a bound water. This work may aid in rational structure- and mechanism-based conversion of constructs based on P3 and other BPhs into efficient near-IR, deep tissue, fluorescent markers.
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Affiliation(s)
- K C Toh
- Biophysics Section, Department of Physics and Astronomy, VU University, De Boelelaan 1081, 1081HV Amsterdam, The Netherlands
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29
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Kloz M, Pillai S, Kodis G, Gust D, Moore TA, Moore AL, van Grondelle R, Kennis JTM. Carotenoid Photoprotection in Artificial Photosynthetic Antennas. J Am Chem Soc 2011; 133:7007-15. [DOI: 10.1021/ja1103553] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Miroslav Kloz
- Biophysics Section, Departments of Physics and Astronomy, Faculty of Sciences, VU University, De Boelelaan 1081, 1081HV Amsterdam, The Netherlands
| | - Smitha Pillai
- Department of Chemistry & Biochemistry and The Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1605, United States
| | - Gerdenis Kodis
- Department of Chemistry & Biochemistry and The Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1605, United States
| | - Devens Gust
- Department of Chemistry & Biochemistry and The Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1605, United States
| | - Thomas A. Moore
- Department of Chemistry & Biochemistry and The Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1605, United States
| | - Ana L. Moore
- Department of Chemistry & Biochemistry and The Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1605, United States
| | - Rienk van Grondelle
- Biophysics Section, Departments of Physics and Astronomy, Faculty of Sciences, VU University, De Boelelaan 1081, 1081HV Amsterdam, The Netherlands
| | - John T. M. Kennis
- Biophysics Section, Departments of Physics and Astronomy, Faculty of Sciences, VU University, De Boelelaan 1081, 1081HV Amsterdam, The Netherlands
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30
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Pan J, Lin S, Allen JP, Williams JC, Frank HA, Woodbury NW. Carotenoid Excited-State Properties in Photosynthetic Purple Bacterial Reaction Centers: Effects of the Protein Environment. J Phys Chem B 2011; 115:7058-68. [DOI: 10.1021/jp200077e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jie Pan
- The Biodesign Institute at Arizona State University, Arizona State University, Tempe, Arizona 85287-5201, United States
| | - Su Lin
- The Biodesign Institute at Arizona State University, Arizona State University, Tempe, Arizona 85287-5201, United States
- Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - James P. Allen
- Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - JoAnn C. Williams
- Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Harry A. Frank
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
| | - Neal W. Woodbury
- The Biodesign Institute at Arizona State University, Arizona State University, Tempe, Arizona 85287-5201, United States
- Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, United States
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31
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Abstract
Six different xanthophyll cycles have been described in photosynthetic organisms. All of them protect the photosynthetic apparatus from photodamage caused by light-induced oxidative stress. Overexcitation conditions lead, in the chloroplast, to the over-reduction of the NADP pool and production of superoxide, which can subsequently be metabolized to hydrogen peroxide or a hydroxyl radical, other reactive oxygen species (ROS). On the other hand, overexcitation of photosystems leads to an increased lifetime of the chlorophyll excited state, increasing the probability of chlorophyll triplet formation which reacts with triplet oxygen forming single oxygen, another ROS. The products of the light-dependent phase of xanthophyll cycles play an important role in the protection against oxidative stress generated not only by an excess of light but also by other ROS-generating factors such as drought, chilling, heat, senescence, or salinity stress. Four, mainly hypothetical, mechanisms explaining the protective role of xanthophyll cycles in oxidative stress are presented. One of them is the direct quenching of overexcitation by products of the light phase of xanthophyll cycles and three others are based on the indirect participation of xanthophyll cycle carotenoids in the process of photoprotection. They include: (1) indirect quenching of overexcitation by aggregation-dependent light-harvesting complexes (LHCII) quenching; (2) light-driven mechanisms in LHCII; and (3) a model based on charge transfer quenching between Chl a and Zx. Moreover, results of the studies on the antioxidant properties of xanthophyll cycle pigments in model systems are also presented.
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Affiliation(s)
- Dariusz Latowski
- Department of Plant Physiology and BiochemistryFaculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Paulina Kuczyńska
- Department of Plant Physiology and BiochemistryFaculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Kazimierz Strzałka
- Department of Plant Physiology and BiochemistryFaculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
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32
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Kloz M, Grondelle RV, Kennis JT. Wavelength-modulated femtosecond stimulated raman spectroscopy—approach towards automatic data processing. Phys Chem Chem Phys 2011; 13:18123-33. [DOI: 10.1039/c1cp21650c] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Toh KC, Stojković EA, Rupenyan AB, van Stokkum IHM, Salumbides M, Groot ML, Moffat K, Kennis JTM. Primary reactions of bacteriophytochrome observed with ultrafast mid-infrared spectroscopy. J Phys Chem A 2010; 115:3778-86. [PMID: 21192725 DOI: 10.1021/jp106891x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Phytochromes are red-light photoreceptor proteins that regulate a variety of responses and cellular processes in plants, bacteria, and fungi. The phytochrome light activation mechanism involves isomerization around the C(15)═C(16) double bond of an open-chain tetrapyrrole chromophore, resulting in a flip of its D-ring. In an important recent development, bacteriophytochrome (Bph) has been engineered for use as a fluorescent marker in mammalian tissues. Bphs covalently bind a biliverdin (BV) chromophore, naturally abundant in mammalian cells. Here, we report an ultrafast time-resolved mid-infrared spectroscopic study on the Pr state of two highly related Bphs from Rps. palustris , RpBphP2 (P2) and RpBphP3 (P3) with distinct photoconversion and fluorescence properties. We observed that the BV excited state of P2 decays in 58 ps, while the BV excited state of P3 decays in 362 ps. By combining ultrafast mid-IR spectroscopy with FTIR spectroscopy on P2 and P3 wild type and mutant proteins, we demonstrate that the hydrogen bond strength at the ring D carbonyl of the BV chromophore is significantly stronger in P3 as compared to P2. This result is consistent with the X-ray structures of Bph, which indicate one hydrogen bond from a conserved histidine to the BV ring D carbonyl for classical bacteriophytochromes such as P2, and one or two additional hydrogen bonds from a serine and a lysine side chain to the BV ring D carbonyl for P3. We conclude that the hydrogen-bond strength at BV ring D is a key determinant of excited-state lifetime and fluorescence quantum yield. Excited-state decay is followed by the formation of a primary intermediate that does not decay on the nanosecond time scale of the experiment, which shows a narrow absorption band at ∼1540 cm(-1). Possible origins of this product band are discussed. This work may aid in rational structure- and mechanism-based conversion of BPh into an efficient near-IR fluorescent marker.
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Affiliation(s)
- K C Toh
- Biophysics Group, Department of Physics and Astronomy, Faculty of Sciences, VU University, De Boelelaan 1081, 1081HV Amsterdam, The Netherlands
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34
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Affiliation(s)
- John Mack
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Japan
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35
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Polívka T, Frank HA. Molecular factors controlling photosynthetic light harvesting by carotenoids. Acc Chem Res 2010; 43:1125-34. [PMID: 20446691 DOI: 10.1021/ar100030m] [Citation(s) in RCA: 247] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Carotenoids are naturally occurring pigments that absorb light in the spectral region in which the sun irradiates maximally. These molecules transfer this energy to chlorophylls, initiating the primary photochemical events of photosynthesis. Carotenoids also regulate the flow of energy within the photosynthetic apparatus and protect it from photoinduced damage caused by excess light absorption. To carry out these functions in nature, carotenoids are bound in discrete pigment-protein complexes in the proximity of chlorophylls. A few three-dimensional structures of these carotenoid complexes have been determined by X-ray crystallography. Thus, the stage is set for attempting to correlate the structural information with the spectroscopic properties of carotenoids to understand the molecular mechanism(s) of their function in photosynthetic systems. In this Account, we summarize current spectroscopic data describing the excited state energies and ultrafast dynamics of purified carotenoids in solution and bound in light-harvesting complexes from purple bacteria, marine algae, and green plants. Many of these complexes can be modified using mutagenesis or pigment exchange which facilitates the elucidation of correlations between structure and function. We describe the structural and electronic factors controlling the function of carotenoids as energy donors. We also discuss unresolved issues related to the nature of spectroscopically dark excited states, which could play a role in light harvesting. To illustrate the interplay between structural determinations and spectroscopic investigations that exemplifies work in the field, we describe the spectroscopic properties of four light-harvesting complexes whose structures have been determined to atomic resolution. The first, the LH2 complex from the purple bacterium Rhodopseudomonas acidophila, contains the carotenoid rhodopin glucoside. The second is the LHCII trimeric complex from higher plants which uses the carotenoids lutein, neoxanthin, and violaxanthin to transfer energy to chlorophyll. The third, the peridinin-chlorophyll-protein (PCP) from the dinoflagellate Amphidinium carterae, is the only known complex in which the bound carotenoid (peridinin) pigments outnumber the chlorophylls. The last is xanthorhodopsin from the eubacterium Salinibacter ruber. This complex contains the carotenoid salinixanthin, which transfers energy to a retinal chromophore. The carotenoids in these pigment-protein complexes transfer energy with high efficiency by optimizing both the distance and orientation of the carotenoid donor and chlorophyll acceptor molecules. Importantly, the versatility and robustness of carotenoids in these light-harvesting pigment-protein complexes have led to their incorporation in the design and synthesis of nanoscale antenna systems. In these bioinspired systems, researchers are seeking to improve the light capture and use of energy from the solar emission spectrum.
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Affiliation(s)
- Tomáš Polívka
- Institute of Physical Biology, University of South Bohemia, Zámek 136, 373 33 Nové Hrady, Czech Republic
- Biological Centre, Czech Academy of Sciences, České Budějovice, Czech Republic
| | - Harry A. Frank
- Department of Chemistry, 55 North Eagleville Road, University of Connecticut, Storrs, Connecticut 06269-3060
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36
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Berera R, van Stokkum IH, Kennis JT, Grondelle RV, Dekker JP. The light-harvesting function of carotenoids in the cyanobacterial stress-inducible IsiA complex. Chem Phys 2010. [DOI: 10.1016/j.chemphys.2010.01.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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37
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Polívka T, Frank HA, Enriquez MM, Niedzwiedzki DM, Liaaen-Jensen S, Hemming J, Helliwell JR, Helliwell M. X-ray Crystal Structure and Time-Resolved Spectroscopy of the Blue Carotenoid Violerythrin. J Phys Chem B 2010; 114:8760-9. [DOI: 10.1021/jp101296a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tomáš Polívka
- Institute of Physical Biology, University of South Bohemia, 373-33 Nove Hrady, Czech Republic, Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, Department of Chemistry, Norwegian University of Science and Technology, Trondheim, Norway, School of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom, and Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, Czech Republic
| | - Harry A. Frank
- Institute of Physical Biology, University of South Bohemia, 373-33 Nove Hrady, Czech Republic, Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, Department of Chemistry, Norwegian University of Science and Technology, Trondheim, Norway, School of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom, and Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, Czech Republic
| | - Miriam M. Enriquez
- Institute of Physical Biology, University of South Bohemia, 373-33 Nove Hrady, Czech Republic, Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, Department of Chemistry, Norwegian University of Science and Technology, Trondheim, Norway, School of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom, and Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, Czech Republic
| | - Dariusz M. Niedzwiedzki
- Institute of Physical Biology, University of South Bohemia, 373-33 Nove Hrady, Czech Republic, Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, Department of Chemistry, Norwegian University of Science and Technology, Trondheim, Norway, School of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom, and Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, Czech Republic
| | - Synnøve Liaaen-Jensen
- Institute of Physical Biology, University of South Bohemia, 373-33 Nove Hrady, Czech Republic, Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, Department of Chemistry, Norwegian University of Science and Technology, Trondheim, Norway, School of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom, and Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, Czech Republic
| | - Joanna Hemming
- Institute of Physical Biology, University of South Bohemia, 373-33 Nove Hrady, Czech Republic, Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, Department of Chemistry, Norwegian University of Science and Technology, Trondheim, Norway, School of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom, and Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, Czech Republic
| | - John R. Helliwell
- Institute of Physical Biology, University of South Bohemia, 373-33 Nove Hrady, Czech Republic, Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, Department of Chemistry, Norwegian University of Science and Technology, Trondheim, Norway, School of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom, and Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, Czech Republic
| | - Madeleine Helliwell
- Institute of Physical Biology, University of South Bohemia, 373-33 Nove Hrady, Czech Republic, Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, Department of Chemistry, Norwegian University of Science and Technology, Trondheim, Norway, School of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom, and Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, Czech Republic
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Mackowski S. Hybrid nanostructures for efficient light harvesting. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:193102. [PMID: 21386429 DOI: 10.1088/0953-8984/22/19/193102] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Hybrid nanostructures are systems composed of two or more nanostructures designed for improving the performance over individual components. In this work we introduce the concept of bridging natural photosynthetic protein-pigment complexes with nanostructures fabricated in an artificial way, such as semiconductor nanocrystals, metallic nanoparticles or carbon nanotubes, with the purpose of enhancing the efficiency of light harvesting either via plasmon excitation in metals or absorption tunability characteristics of semiconductors. In addition to presenting basic features of inorganic nanostructures, we discuss recent advances in the field of hybrid nanostructures composed of photosynthetic pigment-protein complexes.
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Affiliation(s)
- Sebastian Mackowski
- Optics of Hybrid Nanostructures Group, Institute of Physics, Nicolaus Copernicus University, Torun, Poland.
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Regulation of plant light harvesting by thermal dissipation of excess energy. Biochem Soc Trans 2010; 38:651-60. [DOI: 10.1042/bst0380651] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Elucidating the molecular details of qE (energy quenching) induction in higher plants has proven to be a major challenge. Identification of qE mutants has provided initial information on functional elements involved in the qE mechanism; furthermore, investigations on isolated pigment–protein complexes and analysis in vivo and in vitro by sophisticated spectroscopic methods have been used for the elucidation of mechanisms involved. The aim of the present review is to summarize the current knowledge of the phenotype of npq (non-photochemical quenching)-knockout mutants, the role of gene products involved in the qE process and compare the molecular models proposed for this process.
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Hausmann A, Soares ARM, Martínez-Díaz MV, Neves MGPMS, Tomé AC, Cavaleiro JAS, Torres T, Guldi DM. Transduction of excited state energy between covalently linked porphyrins and phthalocyanines. Photochem Photobiol Sci 2010; 9:1027-32. [DOI: 10.1039/c0pp00060d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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Bonetti C, Alexandre MTA, van Stokkum IHM, Hiller RG, Groot ML, van Grondelle R, Kennis JTM. Identification of excited-state energy transfer and relaxation pathways in the peridinin–chlorophyll complex: an ultrafast mid-infrared study. Phys Chem Chem Phys 2010; 12:9256-66. [DOI: 10.1039/b923695c] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Yıldız SZ, Küçükislamoğlu M, Tuna M. Synthesis and characterization of novel flavonoid-substituted phthalocyanines using (±)naringenin. J Organomet Chem 2009. [DOI: 10.1016/j.jorganchem.2009.09.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Harriman A, Mallon LJ, Elliot KJ, Haefele A, Ulrich G, Ziessel R. Length Dependence for Intramolecular Energy Transfer in Three- and Four-Color Donor−Spacer−Acceptor Arrays. J Am Chem Soc 2009; 131:13375-86. [DOI: 10.1021/ja9038856] [Citation(s) in RCA: 130] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Anthony Harriman
- Molecular Photonics Laboratory, School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom, and Laboratoire de Chimie Organique et Spectroscopies Avancées (LCOSA), Ecole Européenne de Chimie, Polymères et Matériaux, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Laura J. Mallon
- Molecular Photonics Laboratory, School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom, and Laboratoire de Chimie Organique et Spectroscopies Avancées (LCOSA), Ecole Européenne de Chimie, Polymères et Matériaux, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Kristopher J. Elliot
- Molecular Photonics Laboratory, School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom, and Laboratoire de Chimie Organique et Spectroscopies Avancées (LCOSA), Ecole Européenne de Chimie, Polymères et Matériaux, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Alexandre Haefele
- Molecular Photonics Laboratory, School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom, and Laboratoire de Chimie Organique et Spectroscopies Avancées (LCOSA), Ecole Européenne de Chimie, Polymères et Matériaux, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Gilles Ulrich
- Molecular Photonics Laboratory, School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom, and Laboratoire de Chimie Organique et Spectroscopies Avancées (LCOSA), Ecole Européenne de Chimie, Polymères et Matériaux, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Raymond Ziessel
- Molecular Photonics Laboratory, School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom, and Laboratoire de Chimie Organique et Spectroscopies Avancées (LCOSA), Ecole Européenne de Chimie, Polymères et Matériaux, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex 02, France
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Berera R, van Grondelle R, Kennis JTM. Ultrafast transient absorption spectroscopy: principles and application to photosynthetic systems. PHOTOSYNTHESIS RESEARCH 2009; 101:105-18. [PMID: 19578970 PMCID: PMC2744833 DOI: 10.1007/s11120-009-9454-y] [Citation(s) in RCA: 375] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Accepted: 06/05/2009] [Indexed: 05/19/2023]
Abstract
The photophysical and photochemical reactions, after light absorption by a photosynthetic pigment-protein complex, are among the fastest events in biology, taking place on timescales ranging from tens of femtoseconds to a few nanoseconds. The advent of ultrafast laser systems that produce pulses with femtosecond duration opened up a new area of research and enabled investigation of these photophysical and photochemical reactions in real time. Here, we provide a basic description of the ultrafast transient absorption technique, the laser and wavelength-conversion equipment, the transient absorption setup, and the collection of transient absorption data. Recent applications of ultrafast transient absorption spectroscopy on systems with increasing degree of complexity, from biomimetic light-harvesting systems to natural light-harvesting antennas, are presented. In particular, we will discuss, in this educational review, how a molecular understanding of the light-harvesting and photoprotective functions of carotenoids in photosynthesis is accomplished through the application of ultrafast transient absorption spectroscopy.
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Affiliation(s)
- Rudi Berera
- Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
- Institute of Biology and Technology of Saclay, CEA (Commissariat a l’Energie Atomique), URA 2096 CNRS (Centre National de la Recherche Scientifique), 91191 Gif/Yvette, France
| | - Rienk van Grondelle
- Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - John T. M. Kennis
- Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
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Terazono Y, Kodis G, Liddell PA, Garg V, Moore TA, Moore AL, Gust D. Multiantenna artificial photosynthetic reaction center complex. J Phys Chem B 2009; 113:7147-55. [PMID: 19438278 DOI: 10.1021/jp900835s] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In order to ensure efficient utilization of the solar spectrum, photosynthetic organisms use a variety of antenna chromophores to absorb light and transfer excitation to a reaction center, where photoinduced charge separation occurs. Reported here is a synthetic molecular heptad that features two bis(phenylethynyl)anthracene and two borondipyrromethene antennas linked to a hexaphenylbenzene core that also bears two zinc porphyrins. A fullerene electron acceptor self-assembles to both porhyrins via dative bonds. Excitation energy is transferred very efficiently from all four antennas to the porphyrins. Singlet-singlet energy transfer occurs both directly and by a stepwise funnel-like pathway wherein excitation moves down a thermodynamic gradient. The porphyrin excited states donate an electron to the fullerene with a time constant of 3 ps to generate a charge-separated state with a lifetime of 230 ps. The overall quantum yield is close to unity. In the absence of the fullerene, the porphyrin excited singlet state donates an electron to a borondipyrromethene on a slower time scale. This molecule demonstrates that by incorporating antennas, it is possible for a molecular system to harvest efficiently light throughout the visible from ultraviolet wavelengths out to approximately 650 nm.
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Affiliation(s)
- Yuichi Terazono
- Department of Chemistry and Biochemistry, Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1604, USA
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A mechanism of energy dissipation in cyanobacteria. Biophys J 2009; 96:2261-7. [PMID: 19289052 DOI: 10.1016/j.bpj.2008.12.3905] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2008] [Revised: 12/03/2008] [Accepted: 12/05/2008] [Indexed: 11/21/2022] Open
Abstract
When grown under a variety of stress conditions, cyanobacteria express the isiA gene, which encodes the IsiA pigment-protein complex. Overexpression of the isiA gene under iron-depletion stress conditions leads to the formation of large IsiA aggregates, which display remarkably short fluorescence lifetimes and thus a strong capacity to dissipate energy. In this work we investigate the underlying molecular mechanism responsible for chlorophyll fluorescence quenching. Femtosecond transient absorption spectroscopy allowed us to follow the process of energy dissipation in real time. The light energy harvested by chlorophyll pigments migrated within the system and eventually reaches a quenching site where the energy is transferred to a carotenoid-excited state, which dissipates it by decaying to the ground state. We compare these findings with those obtained for the main light-harvesting complex in green plants (light-harvesting complex II) and artificial light-harvesting antennas, and conclude that all of these systems show the same mechanism of energy dissipation, i.e., one or more carotenoids act as energy dissipators by accepting energy via low-lying singlet-excited S(1) states and dissipating it as heat.
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Toma HE, Araki K. Exploring the Supramolecular Coordination Chemistry-Based Approach for Nanotechnology. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/9780470440124.ch5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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49
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Carotenoid deactivation in an artificial light-harvesting complex via a vibrationally hot ground state. Chem Phys 2009. [DOI: 10.1016/j.chemphys.2009.01.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Chábera P, Fuciman M, Hříbek P, Polívka T. Effect of carotenoid structure on excited-state dynamics of carbonyl carotenoids. Phys Chem Chem Phys 2009; 11:8795-803. [DOI: 10.1039/b909924g] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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