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Choudhury A, Santra S, Ghosh D. Understanding the Photoprocesses in Biological Systems: Need for Accurate Multireference Treatment. J Chem Theory Comput 2024; 20:4951-4964. [PMID: 38864715 DOI: 10.1021/acs.jctc.4c00027] [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: 06/13/2024]
Abstract
Light-matter interaction is crucial to life itself and revolves around many of the central processes in biology. The need for understanding these photochemical and photophysical processes cannot be overemphasized. Interaction of light with biological systems starts with the absorption of light and subsequent phenomena that occur in the excited states of the system. However, excited states are typically difficult to understand within the mean field approximation of quantum chemical methods. Therefore, suitable multireference methods and methodologies have been developed to understand these phenomena. In this Perspective, we will describe a few methods and methodologies suitable for these descriptions and discuss some persisting difficulties.
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Affiliation(s)
- Arpan Choudhury
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Supriyo Santra
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Debashree Ghosh
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
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2
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Huang H, Peng J, Zhang Y, Gu FL, Lan Z, Xu C. The development of the QM/MM interface and its application for the on-the-fly QM/MM nonadiabatic dynamics in JADE package: Theory, implementation, and applications. J Chem Phys 2024; 160:234101. [PMID: 38884395 DOI: 10.1063/5.0215036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Accepted: 05/15/2024] [Indexed: 06/18/2024] Open
Abstract
Understanding the nonadiabatic dynamics of complex systems is a challenging task in computational photochemistry. Herein, we present an efficient and user-friendly quantum mechanics/molecular mechanics (QM/MM) interface to run on-the-fly nonadiabatic dynamics. Currently, this interface consists of an independent set of codes designed for general-purpose use. Herein, we demonstrate the ability and feasibility of the QM/MM interface by integrating it with our long-term developed JADE package. Tailored to handle nonadiabatic processes in various complex systems, especially condensed phases and protein environments, we delve into the theories, implementations, and applications of on-the-fly QM/MM nonadiabatic dynamics. The QM/MM approach is established within the framework of the additive QM/MM scheme, employing electrostatic embedding, link-atom inclusion, and charge-redistribution schemes to treat the QM/MM boundary. Trajectory surface-hopping dynamics are facilitated using the fewest switches algorithm, encompassing classical and quantum treatments for nuclear and electronic motions, respectively. Finally, we report simulations of nonadiabatic dynamics for two typical systems: azomethane in water and the retinal chromophore PSB3 in a protein environment. Our results not only illustrate the power of the QM/MM program but also reveal the important roles of environmental factors in nonadiabatic processes.
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Affiliation(s)
- Haiyi Huang
- MOE Key Laboratory of Environmental Theoretical Chemistry and Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety, SCNU Environmental Research Institute, School of Environment, South China Normal University, Guangzhou 510006, China
- Center for Advanced Materials Research, Beijing Normal University, Zhuhai 519087, China
- MOE Key Laboratory of Theoretical and Computational Photochemistry, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Jiawei Peng
- MOE Key Laboratory of Environmental Theoretical Chemistry and Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety, SCNU Environmental Research Institute, School of Environment, South China Normal University, Guangzhou 510006, China
| | - Yulin Zhang
- MOE Key Laboratory of Environmental Theoretical Chemistry and Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety, SCNU Environmental Research Institute, School of Environment, South China Normal University, Guangzhou 510006, China
| | - Feng Long Gu
- MOE Key Laboratory of Environmental Theoretical Chemistry and Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety, SCNU Environmental Research Institute, School of Environment, South China Normal University, Guangzhou 510006, China
| | - Zhenggang Lan
- MOE Key Laboratory of Environmental Theoretical Chemistry and Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety, SCNU Environmental Research Institute, School of Environment, South China Normal University, Guangzhou 510006, China
| | - Chao Xu
- MOE Key Laboratory of Environmental Theoretical Chemistry and Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety, SCNU Environmental Research Institute, School of Environment, South China Normal University, Guangzhou 510006, China
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3
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Morreale D, Persico M. Topology of Conical Intersection Seams and the Geometric Phase. J Phys Chem A 2024; 128:1707-1714. [PMID: 38408203 DOI: 10.1021/acs.jpca.3c07042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
In this paper, we demonstrate two topological properties of crossing seams, that is, the sets of points in the N-dimensional space of nuclear coordinates where two electronic eigenstates are degenerate. We shall examine the typical case of states of the same spin with accidental degeneracies, whereby the crossing seam is of dimension N - 2. The first property we demonstrate is that a crossing seam has no boundary, therefore, it must either extend asymptotically to infinite values of one or more coordinates or wrap on itself. The second property is that two (or more) crossing seams can intersect each other but in such a way that neither of them ends at the intersection. When N = 3, the crossing seam is a line in a 3D space; this is so in triatomic molecules but also in reduced dimensionality treatments of larger polyatomics. The above-mentioned rules then mean that the crossing seam is a line of infinite length or a closed loop and can split into three branches but not in two. The example of the first two excited 1A' states of H2Cl+ illustrates these rules and shows their usefulness for computational search and characterization of crossing seams.
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Affiliation(s)
- Daniel Morreale
- Department of Chemistry and Industrial Chemistry, University of Pisa, v. G. Moruzzi 13, Pisa 56126, Italy
| | - Maurizio Persico
- Department of Chemistry and Industrial Chemistry, University of Pisa, v. G. Moruzzi 13, Pisa 56126, Italy
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Penzkofer A, Silapetere A, Hegemann P. Photocycle dynamics of the Archaerhodopsin 3 based fluorescent voltage sensor Archon2. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2021; 225:112331. [PMID: 34688164 DOI: 10.1016/j.jphotobiol.2021.112331] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 09/21/2021] [Accepted: 10/05/2021] [Indexed: 11/28/2022]
Abstract
The retinal photocycle dynamics of the fluorescent voltage sensor Archon2 in pH 8 Tris buffer was studied. Archon2 is a mutant of Archaerhodopsin 3 (Arch) from Halorubrum sodomense obtained by a robotic multidimensional directed evolution approach (Archon2 = Arch T56P-P60S-T80P-D95H-T99S-T116I-F161V-T183I-L197I-A225C). The samples were photo-excited to the first absorption band of the protonated retinal Schiff base (PRSB) Ret_586 (absorption maximum at λmax = 586 nm, excitation wavelengths λexc = 590 nm and 632.8 nm). The photocycle dynamics were studied by recording absorption spectra during light exposure and after light exposure. Ret_586 photoisomerized to Ret_535 (main component) and Ret_485 (minor component). Ret_535 backward photoisomerized to Ret_586 in light-adapted state (named Ret_586la) and partly deprotonated to neutral retinal Schiff base (RSB) Ret_372 in light adapted state (named Ret_372la, same isomer form as Ret_535). After excitation light switch-off Ret_372la recovered to Ret_372 in dark-adapted state (Ret_372da) which slowly re-protonated to Ret_535, and Ret_535 slowly isomerized back to Ret_586 in dark-adapted state (Ret_586da). Photocycle schemes and reaction coordinate diagrams are developed and photocycle parameters are determined.
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Affiliation(s)
- Alfons Penzkofer
- Fakultät für Physik, Universität Regensburg, Universitätsstraße 31, D-93053 Regensburg, Germany.
| | - Arita Silapetere
- Experimentelle Biophysik, Institut für Biologie, Humboldt Universität zu Berlin, Invalidenstraße 42, D-10115 Berlin, Germany
| | - Peter Hegemann
- Experimentelle Biophysik, Institut für Biologie, Humboldt Universität zu Berlin, Invalidenstraße 42, D-10115 Berlin, Germany
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Matsika S. Electronic Structure Methods for the Description of Nonadiabatic Effects and Conical Intersections. Chem Rev 2021; 121:9407-9449. [PMID: 34156838 DOI: 10.1021/acs.chemrev.1c00074] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Nonadiabatic effects are ubiquitous in photophysics and photochemistry, and therefore, many theoretical developments have been made to properly describe them. Conical intersections are central in nonadiabatic processes, as they promote efficient and ultrafast nonadiabatic transitions between electronic states. A proper theoretical description requires developments in electronic structure and specifically in methods that describe conical intersections between states and nonadiabatic coupling terms. This review focuses on the electronic structure aspects of nonadiabatic processes. We discuss the requirements of electronic structure methods to describe conical intersections and nonadiabatic couplings, how the most common excited state methods perform in describing these effects, and what the recent developments are in expanding the methodology and implementing nonadiabatic couplings.
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Affiliation(s)
- Spiridoula Matsika
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
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6
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Farfan CA, Turner DB. A systematic model study quantifying how conical intersection topography modulates photochemical reactions. Phys Chem Chem Phys 2020; 22:20265-20283. [PMID: 32966428 DOI: 10.1039/d0cp03464a] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Despite their important role in photochemistry and expected presence in most polyatomic molecules, conical intersections have been thoroughly characterized in a comparatively small number of systems. Conical intersections can confer molecular photoreactivity or photostability, often with remarkable efficacy, due to their unique structure: at a conical intersection, the adiabatic potential energy surfaces of two or more electronic states are degenerate, enabling ultrafast decay from an excited state without radiative emission, known as nonadiabatic transfer. Furthermore, the precise conical intersection topography determines fundamental properties of photochemical processes, including excited-state decay rate, efficacy, and molecular products that are formed. However, these relationships have yet to be defined comprehensively. In this article, we use an adaptable computational model to investigate a variety of conical intersection topographies, simulate resulting nonadiabatic dynamics, and calculate key photochemical observables. We varied the vibrational mode frequencies to modify conical intersection topography systematically in four primary classes of conical intersections and quantified the resulting rate, total yield, and product yield of nonadiabatic decay. The results reveal that higher vibrational mode frequencies reduce nonadiabatic transfer, but increase the transfer rate and resulting photoproduct formation. These trends can inform progress toward experimental control of photochemical reactions or tuning of molecules' photochemical properties based on conical intersections and their topography.
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Affiliation(s)
- Camille A Farfan
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - Daniel B Turner
- Department of Chemistry, New York University, New York, NY 10003, USA
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7
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Claudino D, Mayhall NJ. Automatic Partition of Orbital Spaces Based on Singular Value Decomposition in the Context of Embedding Theories. J Chem Theory Comput 2019; 15:1053-1064. [DOI: 10.1021/acs.jctc.8b01112] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Daniel Claudino
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24060, United States
| | - Nicholas J. Mayhall
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24060, United States
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8
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Sala M, Egorova D. Quantum dynamics of multi-dimensional rhodopsin photoisomerization models: Approximate versus accurate treatment of the secondary modes. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.07.052] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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9
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Li SL, Truhlar DG. Full-dimensional ground- and excited-state potential energy surfaces and state couplings for photodissociation of thioanisole. J Chem Phys 2017; 146:064301. [DOI: 10.1063/1.4975121] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- Shaohong L. Li
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute,
University of Minnesota, Minneapolis, Minnesota 55455,
USA
| | - Donald G. Truhlar
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute,
University of Minnesota, Minneapolis, Minnesota 55455,
USA
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10
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Maza JR, Jenkins S, Kirk SR. 11-cis retinal torsion: A QTAIM and stress tensor analysis of the S1 excited state. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.04.051] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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Liu L, Liu J, Martinez TJ. Dynamical Correlation Effects on Photoisomerization: Ab Initio Multiple Spawning Dynamics with MS-CASPT2 for a Model trans-Protonated Schiff Base. J Phys Chem B 2016; 120:1940-9. [DOI: 10.1021/acs.jpcb.5b09838] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lihong Liu
- Key
Laboratory of Theoretical and Computational Photochemistry, Ministry
of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
- Department
of Chemistry and PULSE Institute, Stanford University, Stanford, California 94305, United States
- SLAC National Accelerator Laboratory, Menlo Park, California 94309, United States
| | - Jian Liu
- Department
of Chemistry and PULSE Institute, Stanford University, Stanford, California 94305, United States
- SLAC National Accelerator Laboratory, Menlo Park, California 94309, United States
- Beijing
National Laboratory for Molecular Sciences, Institute of Theoretical
and Computational Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Todd J. Martinez
- Department
of Chemistry and PULSE Institute, Stanford University, Stanford, California 94305, United States
- SLAC National Accelerator Laboratory, Menlo Park, California 94309, United States
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12
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Blancafort L. Photochemistry and photophysics at extended seams of conical intersection. Chemphyschem 2014; 15:3166-81. [PMID: 25157686 DOI: 10.1002/cphc.201402359] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Indexed: 11/07/2022]
Abstract
The role of extended seams of conical intersection in excited-state mechanisms is reviewed. Seams are crossings of the potential energy surface in many dimensions where the decay from the excited to the ground state can occur, and the extended seam is composed of different segments lying along a reaction coordinate. Every segment is associated with a different primary photoproduct, which gives rise to competing pathways. This idea is first illustrated for fulvene and ethylene, and then it is used to explain more complex cases such as the dependence of the isomerisation of retinal chromophore isomers on the protein environment, the dependence of the efficiency of the azobenzene photochemical switch on the wavelength of irradiation and the direction of the isomerisation, and the coexistence of different mechanisms in the photo-induced Wolff rearrangement of diazonaphthoquinone. The role of extended seams in the photophysics of the DNA nucleobases and the relationship between two-state seams and three-state crossings is also discussed. As an outlook, the design of optical control strategies based on the passage of the excited molecule through the seam is considered, and it is shown how the excited-state lifetime of fulvene can be modulated by shaping the energy of the seam.
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Affiliation(s)
- Lluís Blancafort
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, Campus de Montilivi, 17071 Girona (Spain).
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13
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Maeda S, Taketsugu T, Morokuma K. Exploring Pathways of Photoaddition Reactions by Artificial Force Induced Reaction Method: A Case Study on the Paternò–Büchi Reaction. Z PHYS CHEM 2013. [DOI: 10.1524/zpch.2013.0401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Krause P, Matsika S, Kotur M, Weinacht T. The influence of excited state topology on wavepacket delocalization in the relaxation of photoexcited polyatomic molecules. J Chem Phys 2012; 137:22A537. [DOI: 10.1063/1.4748580] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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15
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Nenov A, de Vivie-Riedle R. Conical intersection seams in polyenes derived from their chemical composition. J Chem Phys 2012; 137:074101. [DOI: 10.1063/1.4745183] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
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16
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Minezawa N, Gordon MS. Optimizing conical intersections of solvated molecules: The combined spin-flip density functional theory/effective fragment potential method. J Chem Phys 2012; 137:034116. [DOI: 10.1063/1.4734314] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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17
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González L, Escudero D, Serrano-Andrés L. Progress and Challenges in the Calculation of Electronic Excited States. Chemphyschem 2011; 13:28-51. [DOI: 10.1002/cphc.201100200] [Citation(s) in RCA: 310] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Revised: 08/05/2011] [Indexed: 11/09/2022]
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Affiliation(s)
| | - Pascal Krause
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122;
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19
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Schapiro I, Melaccio F, Laricheva EN, Olivucci M. Using the computer to understand the chemistry of conical intersections. Photochem Photobiol Sci 2011; 10:867-86. [DOI: 10.1039/c0pp00290a] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Aborted double bicycle-pedal isomerization with hydrogen bond breaking is the primary event of bacteriorhodopsin proton pumping. Proc Natl Acad Sci U S A 2010; 107:20172-7. [PMID: 21048087 DOI: 10.1073/pnas.1007000107] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Quantum mechanics/molecular mechanics calculations based on ab initio multiconfigurational second order perturbation theory are employed to construct a computer model of Bacteriorhodopsin that reproduces the observed static and transient electronic spectra, the dipole moment changes, and the energy stored in the photocycle intermediate K. The computed reaction coordinate indicates that the isomerization of the retinal chromophore occurs via a complex motion accounting for three distinct regimes: (i) production of the excited state intermediate I, (ii) evolution of I toward a conical intersection between the excited state and the ground state, and (iii) formation of K. We show that, during stage ii, a space-saving mechanism dominated by an asynchronous double bicycle-pedal deformation of the C10═C11─C12═C13─C14═N moiety of the chromophore dominates the isomerization. On this same stage a N─H/water hydrogen bond is weakened and initiates a breaking process that is completed during stage iii.
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21
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Briand J, Bräm O, Réhault J, Léonard J, Cannizzo A, Chergui M, Zanirato V, Olivucci M, Helbing J, Haacke S. Coherent ultrafast torsional motion and isomerization of a biomimetic dipolar photoswitch. Phys Chem Chem Phys 2010; 12:3178-87. [PMID: 20237707 DOI: 10.1039/b918603d] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Femtosecond fluorescence up-conversion, UV-Vis and IR transient absorption spectroscopy are used to study the photo-isomerization dynamics of a new type of zwitterionic photoswitch based on a N-alkylated indanylidene pyrroline Schiff base framework (ZW-NAIP). The system is biomimetic, as it mimics the photophysics of retinal, in coupling excited state charge translocation and isomerization. While the fluorescence lifetime is 140 fs, excited state absorption persists over 230 fs in the form of a vibrational wavepacket according to twisting of the isomerizing double bond. After a short "dark" time window in the UV-visible spectra, which we associate with the passage through a conical intersection (CI), the wavepacket appears on the ground state potential energy surface, as evidenced by the transient mid-IR data. This allows for a precise timing of the photoreaction all the way from the initial Franck-Condon region, through the CI and into both ground state isomers, until incoherent vibrational relaxation dominates the dynamics. The photo-reaction dynamics remarkably follow those observed for retinal in rhodopsin, with the additional benefit that in ZW-NAIP the conformational change reverses the zwitterion dipole moment direction. Last, the pronounced low-frequency coherences make these molecules ideal systems for investigating wavepacket dynamics in the vicinity of a CI and for coherent control experiments.
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Affiliation(s)
- Julien Briand
- Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, Strasbourg University, CNRS, IPCMS-DON, 23, rue du Loess, 67034 Strasbourg, France
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22
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Olsen S, McKenzie RH. Conical Intersections, charge localization, and photoisomerization pathway selection in a minimal model of a degenerate monomethine dye. J Chem Phys 2009; 131:234306. [DOI: 10.1063/1.3267862] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Seth Olsen
- Center for Organic Photonics and Electronics, School of Mathematics and Physics, The University of Queensland, Brisbane QLD 4072, Australia.
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23
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Blancafort L, Lasorne B, Bearpark MJ, Worth GA, Robb MA. Second-Order Analysis of Conical Intersections: Applications to Photochemistry and Photophysics of Organic Molecules. ACTA ACUST UNITED AC 2009. [DOI: 10.1007/978-3-642-03432-9_7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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24
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Tomasello G, Olaso-González G, Altoè P, Stenta M, Serrano-Andrés L, Merchán M, Orlandi G, Bottoni A, Garavelli M. Electrostatic control of the photoisomerization efficiency and optical properties in visual pigments: on the role of counterion quenching. J Am Chem Soc 2009; 131:5172-86. [PMID: 19309158 DOI: 10.1021/ja808424b] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hybrid QM(CASPT2//CASSCF/6-31G*)/MM(Amber) computations have been used to map the photoisomerization path of the retinal chromophore in Rhodopsin and explore the reasons behind the photoactivity efficiency and spectral control in the visual pigments. It is shown that while the electrostatic environment plays a central role in properly tuning the optical properties of the chromophore, it is also critical in biasing the ultrafast photochemical event: it controls the slope of the photoisomerization channel as well as the accessibility of the S(1)/S(0) crossing space triggering the ultrafast decay. The roles of the E113 counterion, the E181 residue, and the other amino acids of the protein pocket are explicitly analyzed: it appears that counterion quenching by the protein environment plays a key role in setting up the chromophore's optical properties and its photochemical efficiency. A unified scenario is presented that discloses the relationship between spectroscopic and mechanistic properties in rhodopsins and allows us to draw a solid mechanism for spectral tuning in color vision pigments: a tunable counterion shielding appears as the elective mechanism for L<-->M spectral modulation, while a retinal conformational control must dictate S absorption. Finally, it is suggested that this model may contribute to shed new light into mutations-related vision deficiencies that opens innovative perspectives for experimental biomolecular investigations in this field.
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Affiliation(s)
- Gaia Tomasello
- Dipartimento di Chimica G. Ciamician, Università di Bologna, via Selmi 2, Bologna I-40126, Italy
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25
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Quantum Mechanical Studies of the Photophysics of DNA and RNA Bases. CHALLENGES AND ADVANCES IN COMPUTATIONAL CHEMISTRY AND PHYSICS 2009. [DOI: 10.1007/978-1-4020-9956-4_11] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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26
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Schapiro I, Weingart O, Buss V. Bicycle-Pedal Isomerization in a Rhodopsin Chromophore Model. J Am Chem Soc 2008; 131:16-7. [DOI: 10.1021/ja805586z] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Igor Schapiro
- Department of Chemistry, University of Duisburg-Essen, 45141 Essen, Germany
| | - Oliver Weingart
- Department of Chemistry, University of Duisburg-Essen, 45141 Essen, Germany
| | - Volker Buss
- Department of Chemistry, University of Duisburg-Essen, 45141 Essen, Germany
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27
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De Vico L, Lindh R. Location of Two Seams in the Proximity of the C2v ππ* Minimum Energy Path of Formaldehyde. J Chem Theory Comput 2008; 5:186-91. [DOI: 10.1021/ct800348s] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Luca De Vico
- Department of Theoretical Chemistry, Lund University, P.O. Box 124, SE-22100 Lund, Sweden
| | - Roland Lindh
- Department of Theoretical Chemistry, Lund University, P.O. Box 124, SE-22100 Lund, Sweden
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28
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Szymczak JJ, Barbatti M, Lischka H. Mechanism of Ultrafast Photodecay in Restricted Motions in Protonated Schiff Bases: The Pentadieniminium Cation. J Chem Theory Comput 2008; 4:1189-99. [DOI: 10.1021/ct800148n] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jaroslaw J. Szymczak
- Institute for Theoretical Chemistry, University of Vienna, Waehringerstrasse 17, A-1090 Vienna, Austria
| | - Mario Barbatti
- Institute for Theoretical Chemistry, University of Vienna, Waehringerstrasse 17, A-1090 Vienna, Austria
| | - Hans Lischka
- Institute for Theoretical Chemistry, University of Vienna, Waehringerstrasse 17, A-1090 Vienna, Austria
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29
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Tishchenko O, Truhlar DG, Ceulemans A, Nguyen MT. A Unified Perspective on the Hydrogen Atom Transfer and Proton-Coupled Electron Transfer Mechanisms in Terms of Topographic Features of the Ground and Excited Potential Energy Surfaces As Exemplified by the Reaction between Phenol and Radicals. J Am Chem Soc 2008; 130:7000-10. [DOI: 10.1021/ja7102907] [Citation(s) in RCA: 127] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Oksana Tishchenko
- Department of Chemistry and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, and Department of Chemistry and Mathematical Modelling and Computational Science Center, University of Leuven, B-3001 Leuven, Belgium
| | - Donald G. Truhlar
- Department of Chemistry and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, and Department of Chemistry and Mathematical Modelling and Computational Science Center, University of Leuven, B-3001 Leuven, Belgium
| | - Arnout Ceulemans
- Department of Chemistry and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, and Department of Chemistry and Mathematical Modelling and Computational Science Center, University of Leuven, B-3001 Leuven, Belgium
| | - Minh Tho Nguyen
- Department of Chemistry and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, and Department of Chemistry and Mathematical Modelling and Computational Science Center, University of Leuven, B-3001 Leuven, Belgium
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30
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Effect of opsin on the shape of the potential energy surfaces at the conical intersection of the Rhodopsin chromophore. Chem Phys 2008. [DOI: 10.1016/j.chemphys.2008.03.035] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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31
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Strambi A, Coto PB, Frutos LM, Ferré N, Olivucci M. Relationship between the Excited State Relaxation Paths of Rhodopsin and Isorhodopsin. J Am Chem Soc 2008; 130:3382-8. [DOI: 10.1021/ja0749082] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Angela Strambi
- Dipartimento di Chimica, Università di Siena, via Aldo Moro I-53100 Siena, Italy, Instituto de Ciencia Molecular (ICMOL) Universidad de Valencia, Institutos de Paterna, 22085, ES-46071, Valencia, Spain, Laboratoire de Chimie Théorique et de Modélisation Moléculaire, UMR 6517- CNRS Université de Provence, Case 521 − Faculté de Saint-Jérôme, Av. Esc. Normandie Niemen, 13397 Marseille Cedex 20, France, and Chemistry Department, Bowling Green State University, Bowling Green, Ohio 43403
| | - Pedro B. Coto
- Dipartimento di Chimica, Università di Siena, via Aldo Moro I-53100 Siena, Italy, Instituto de Ciencia Molecular (ICMOL) Universidad de Valencia, Institutos de Paterna, 22085, ES-46071, Valencia, Spain, Laboratoire de Chimie Théorique et de Modélisation Moléculaire, UMR 6517- CNRS Université de Provence, Case 521 − Faculté de Saint-Jérôme, Av. Esc. Normandie Niemen, 13397 Marseille Cedex 20, France, and Chemistry Department, Bowling Green State University, Bowling Green, Ohio 43403
| | - Luis Manuel Frutos
- Dipartimento di Chimica, Università di Siena, via Aldo Moro I-53100 Siena, Italy, Instituto de Ciencia Molecular (ICMOL) Universidad de Valencia, Institutos de Paterna, 22085, ES-46071, Valencia, Spain, Laboratoire de Chimie Théorique et de Modélisation Moléculaire, UMR 6517- CNRS Université de Provence, Case 521 − Faculté de Saint-Jérôme, Av. Esc. Normandie Niemen, 13397 Marseille Cedex 20, France, and Chemistry Department, Bowling Green State University, Bowling Green, Ohio 43403
| | - Nicolas Ferré
- Dipartimento di Chimica, Università di Siena, via Aldo Moro I-53100 Siena, Italy, Instituto de Ciencia Molecular (ICMOL) Universidad de Valencia, Institutos de Paterna, 22085, ES-46071, Valencia, Spain, Laboratoire de Chimie Théorique et de Modélisation Moléculaire, UMR 6517- CNRS Université de Provence, Case 521 − Faculté de Saint-Jérôme, Av. Esc. Normandie Niemen, 13397 Marseille Cedex 20, France, and Chemistry Department, Bowling Green State University, Bowling Green, Ohio 43403
| | - Massimo Olivucci
- Dipartimento di Chimica, Università di Siena, via Aldo Moro I-53100 Siena, Italy, Instituto de Ciencia Molecular (ICMOL) Universidad de Valencia, Institutos de Paterna, 22085, ES-46071, Valencia, Spain, Laboratoire de Chimie Théorique et de Modélisation Moléculaire, UMR 6517- CNRS Université de Provence, Case 521 − Faculté de Saint-Jérôme, Av. Esc. Normandie Niemen, 13397 Marseille Cedex 20, France, and Chemistry Department, Bowling Green State University, Bowling Green, Ohio 43403
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32
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Sicilia F, Blancafort L, Bearpark MJ, Robb MA. New Algorithms for Optimizing and Linking Conical Intersection Points. J Chem Theory Comput 2008; 4:257-66. [DOI: 10.1021/ct7002435] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fabrizio Sicilia
- Department of Chemistry, Imperial College, London SW7 2AZ, United Kingdom, and Institut de Quimica, Computational and Departament de Quimica, Universitat de Girona, E-17071 Girona, Spain
| | - Lluís Blancafort
- Department of Chemistry, Imperial College, London SW7 2AZ, United Kingdom, and Institut de Quimica, Computational and Departament de Quimica, Universitat de Girona, E-17071 Girona, Spain
| | - Michael J. Bearpark
- Department of Chemistry, Imperial College, London SW7 2AZ, United Kingdom, and Institut de Quimica, Computational and Departament de Quimica, Universitat de Girona, E-17071 Girona, Spain
| | - Michael A. Robb
- Department of Chemistry, Imperial College, London SW7 2AZ, United Kingdom, and Institut de Quimica, Computational and Departament de Quimica, Universitat de Girona, E-17071 Girona, Spain
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33
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Levine BG, Coe JD, Martínez TJ. Optimizing conical intersections without derivative coupling vectors: application to multistate multireference second-order perturbation theory (MS-CASPT2). J Phys Chem B 2007; 112:405-13. [PMID: 18081339 DOI: 10.1021/jp0761618] [Citation(s) in RCA: 300] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
We introduce a new method for optimizing minimal energy conical intersections (MECIs), based on a sequential penalty constrained optimization in conjunction with a smoothing function. The method is applied to optimize MECI geometries using the multistate formulation of second-order multireference perturbation theory (MS-CASPT2). Resulting geometries and energetics for conjugated molecules including ethylene, butadiene, stilbene, and the green fluorescent protein chromophore are compared with state-averaged complete active space self-consistent field (SA-CASSCF) and, where possible, benchmark multireference single- and double-excitation configuration interaction (MRSDCI) optimizations. Finally, we introduce the idea of "minimal distance conical intersections", which are points on the intersection seam that lie closest to some specified geometry such as the Franck-Condon point or a local minimum on the excited state.
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Affiliation(s)
- Benjamin G Levine
- Department of Chemistry and The Beckman Institute, University of Illinois, Urbana, Illinois 61801, USA
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34
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Substituent-controlled photoisomerization in retinal chromophore models: Fluorinated and methoxy-substituted protonated Schiff bases. J Photochem Photobiol A Chem 2007. [DOI: 10.1016/j.jphotochem.2006.12.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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35
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CASSCF calculations for photoinduced processes in large molecules: Choosing when to use the RASSCF, ONIOM and MMVB approximations. J Photochem Photobiol A Chem 2007. [DOI: 10.1016/j.jphotochem.2007.05.008] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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36
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Frutos LM, Andruniów T, Santoro F, Ferré N, Olivucci M. Tracking the excited-state time evolution of the visual pigment with multiconfigurational quantum chemistry. Proc Natl Acad Sci U S A 2007; 104:7764-9. [PMID: 17470789 PMCID: PMC1876521 DOI: 10.1073/pnas.0701732104] [Citation(s) in RCA: 221] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2007] [Indexed: 11/18/2022] Open
Abstract
The primary event that initiates vision is the photoinduced isomerization of retinal in the visual pigment rhodopsin (Rh). Here, we use a scaled quantum mechanics/molecular mechanics potential that reproduces the isomerization path determined with multiconfigurational perturbation theory to follow the excited-state evolution of bovine Rh. The analysis of a 140-fs trajectory provides a description of the electronic and geometrical changes that prepare the system for decay to the ground state. The data uncover a complex change of the retinal backbone that, at approximately 60-fs delay, initiates a space saving "asynchronous bicycle-pedal or crankshaft" motion, leading to a conical intersection on a 110-fs time scale. It is shown that the twisted structure achieved at decay features a momentum that provides a natural route toward the photoRh structure recently resolved by using femtosecond-stimulated Raman spectroscopy.
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Affiliation(s)
- Luis Manuel Frutos
- Dipartimento di Chimica, Università di Siena, via Aldo Moro 2, I-53100 Siena, Italy
| | - Tadeusz Andruniów
- Institute of Physical and Theoretical Chemistry, Department of Chemistry, Wroclaw University of Technology, 27 Wyb. Wyspianskiego, 50-370, Wroclaw, Poland
| | - Fabrizio Santoro
- Istituto per i Processi Chimico-Fisici, Consiglio Nazionale delle Ricerche, Via Moruzzi 1, I-56124 Pisa, Italy; and
| | - Nicolas Ferré
- Laboratoire de Chimie Théorique et de Modélisation Moléculaire, Unité Mixte de Recherche 6517, Centre National de la Recherche Scientifique, Université de Provence, Case 521, Faculté de Saint-Jérôme, Avenue Esc. Normandie Niemen, 13397 Marseille Cedex 20, France
| | - Massimo Olivucci
- Dipartimento di Chimica, Università di Siena, via Aldo Moro 2, I-53100 Siena, Italy
- Department of Chemistry, Bowling Green State University, Bowling Green, OH 43403
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37
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Struts AV, Salgado GFJ, Tanaka K, Krane S, Nakanishi K, Brown MF. Structural analysis and dynamics of retinal chromophore in dark and meta I states of rhodopsin from 2H NMR of aligned membranes. J Mol Biol 2007; 372:50-66. [PMID: 17640664 PMCID: PMC5233725 DOI: 10.1016/j.jmb.2007.03.046] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2006] [Revised: 03/02/2007] [Accepted: 03/19/2007] [Indexed: 11/29/2022]
Abstract
Rhodopsin is a prototype for G protein-coupled receptors (GPCRs) that are implicated in many biological responses in humans. A site-directed (2)H NMR approach was used for structural analysis of retinal within its binding cavity in the dark and pre-activated meta I states. Retinal was labeled with (2)H at the C5, C9, or C13 methyl groups by total synthesis, and was used to regenerate the opsin apoprotein. Solid-state (2)H NMR spectra were acquired for aligned membranes in the low-temperature lipid gel phase versus the tilt angle to the magnetic field. Data reduction assumed a static uniaxial distribution, and gave the retinylidene methyl bond orientations plus the alignment disorder (mosaic spread). The dark-state (2)H NMR structure of 11-cis-retinal shows torsional twisting of the polyene chain and the beta-ionone ring. The ligand undergoes restricted motion, as evinced by order parameters of approximately 0.9 for the spinning C-C(2)H(3) groups, with off-axial fluctuations of approximately 15 degrees . Retinal is accommodated within the rhodopsin binding pocket with a negative pre-twist about the C11=C12 double bond that explains its rapid photochemistry and the trajectory of 11-cis to trans isomerization. In the cryo-trapped meta I state, the (2)H NMR structure shows a reduction of the polyene strain, while torsional twisting of the beta-ionone ring is maintained. Distortion of the retinal conformation is interpreted through substituent control of receptor activation. Steric hindrance between trans retinal and Trp265 can trigger formation of the subsequent activated meta II state. Our results are pertinent to quantum and molecular mechanics simulations of ligands bound to GPCRs, and illustrate how (2)H NMR can be applied to study their biological mechanisms of action.
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Affiliation(s)
- Andrey V. Struts
- Department of Chemistry, University of Arizona, Tucson, Arizona 85721, USA
| | - Gilmar F. J. Salgado
- Department of Biochemistry & Molecular Biophysics, University of Arizona, Tucson, Arizona 85721, USA
| | - Katsunori Tanaka
- Department of Chemistry, Columbia University, New York, New York 10027, USA
| | - Sonja Krane
- Department of Chemistry, Columbia University, New York, New York 10027, USA
| | - Koji Nakanishi
- Department of Chemistry, Columbia University, New York, New York 10027, USA
| | - Michael F. Brown
- Department of Chemistry, University of Arizona, Tucson, Arizona 85721, USA
- Department of Biochemistry & Molecular Biophysics, University of Arizona, Tucson, Arizona 85721, USA
- Department of Physics, University of Arizona, Tucson, Arizona 85721, USA
- Corresponding author:
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38
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Norton JE, Houk KN. H/vinyl conical intersections of hexatrienes related to the hula-twist photoisomerization. Mol Phys 2007. [DOI: 10.1080/00268970500417606] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Joseph E. Norton
- a Department of Chemistry and Biochemistry , University of California , Los Angeles, CA 90095-1569, USA
| | - K. N. Houk
- a Department of Chemistry and Biochemistry , University of California , Los Angeles, CA 90095-1569, USA
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39
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Coto PB, Sinicropi A, De Vico L, Ferré N, Olivucci M. Characterization of the conical intersection of the visual pigment rhodopsin at the CASPT2//CASSCF/AMBER level of theory. Mol Phys 2007. [DOI: 10.1080/00268970500415865] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- P. B. Coto
- a Dipartimento di Chimica , Università di Siena , Via Aldo Moro I-53100 Siena, Italy
| | - A. Sinicropi
- a Dipartimento di Chimica , Università di Siena , Via Aldo Moro I-53100 Siena, Italy
| | - L. De Vico
- b Department of Theoretical Chemistry , Lund University , Chemical Centre, P.O. Box 124, S-221 00 Lund, Sweden
| | - N. Ferré
- c Laboratoire de Chimie Théorique et de Modélisation Moléculaire , Unité Mixte de Recherche 6517, Université de Provence , Case 521, Faculté de Saint Jérôme, 13397 Marseille Cedex 20, France
| | - M. Olivucci
- a Dipartimento di Chimica , Università di Siena , Via Aldo Moro I-53100 Siena, Italy
- d Centro per lo Studio dei Sistemi Complessi , Via Tommaso Pendola 37, I-53100 , Siena, Italy
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40
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Ogliaro F, Wilsey S, Bearpark MJ, Sardo-Infirri S. Interpreting the excited states and decay processes of bichromophoric 1-phenyl-1,3-butadiene using CASSCF calculations. Mol Phys 2007. [DOI: 10.1080/00268970500418307] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- François Ogliaro
- a Equipe de Chimie et Biochimie Théoriques – UMR 7565 , Université Henri Poincaré , Nancy 1, BP 239, 54506 Vandoeuvre-lès-Nancy Cedex, France
| | - Sarah Wilsey
- b Department of Chemistry, Imperial College London , South Kensington Campus , London SW7 2AZ, UK
| | - Michael J. Bearpark
- b Department of Chemistry, Imperial College London , South Kensington Campus , London SW7 2AZ, UK
| | - Sofia Sardo-Infirri
- c Department of Chemistry , King's College London , Strand, London WC2R 2LS, UK
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41
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Fernandez-Ramos A, Miller JA, Klippenstein SJ, Truhlar DG. Modeling the kinetics of bimolecular reactions. Chem Rev 2007; 106:4518-84. [PMID: 17091928 DOI: 10.1021/cr050205w] [Citation(s) in RCA: 393] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Antonio Fernandez-Ramos
- Departamento de Quimica Fisica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
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42
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Dreuw A. Quantum Chemical Methods for the Investigation of Photoinitiated Processes in Biological Systems: Theory and Applications. Chemphyschem 2006; 7:2259-74. [PMID: 17009357 DOI: 10.1002/cphc.200600064] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
With the advent of modern computers and advances in the development of efficient quantum chemical computer codes, the meaningful computation of large molecular systems at a quantum mechanical level became feasible. Recent experimental effort to understand photoinitiated processes in biological systems, for instance photosynthesis or vision, at a molecular level also triggered theoretical investigations in this field. In this Minireview, standard quantum chemical methods are presented that are applicable and recently used for the calculation of excited states of photoinitiated processes in biological molecular systems. These methods comprise configuration interaction singles, the complete active space self-consistent field method, and time-dependent density functional theory and its variants. Semiempirical approaches are also covered. Their basic theoretical concepts and mathematical equations are briefly outlined, and their properties and limitations are discussed. Recent successful applications of the methods to photoinitiated processes in biological systems are described and theoretical tools for the analysis of excited states are presented.
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Affiliation(s)
- Andreas Dreuw
- Institut für Physikalische und Theoretische Chemie, Johann Wolfgang Goethe-Universität, Max von Laue-Str. 7, 60438 Frankfurt am Main, Germany.
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43
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Muñoz Losa A, Fdez Galván I, Martín ME, Aguilar MA. Solvent Effects on the Low-Lying Excited States of a Model of Retinal. J Phys Chem B 2006; 110:18064-71. [PMID: 16956299 DOI: 10.1021/jp057563n] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The low-lying excited states of a solution in alcohol of a five-double-bond model of the rhodopsin protein chromophore, the protonated 11-cis-retinal Schiff base (PSB11), are studied theoretically. We combine a multireference perturbational treatment in the description of the solute molecule with molecular dynamics calculations in the description of the solvent. The geometry, charge distribution, and electronic spectra are strongly influenced by the solvent. The solvent shift values show a marked dependence on the use of relaxed geometries in solution and on the nature of the states involved in the excitation process. The dynamic correlation has a strong effect on the order of the excited states. In solution, the first two excited states almost become degenerate.
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Affiliation(s)
- Aurora Muñoz Losa
- Departamento de Química Física, Facultad de Ciencias, Universidad de Extremadura, Avda de Elvas s/n, 06071 Badajoz, Spain
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44
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Li J, Woywod C, Vallet V, Meier C. Investigation of the dynamics of two coupled oscillators with mixed quantum-classical methods. J Chem Phys 2006; 124:184105. [PMID: 16709095 DOI: 10.1063/1.2196408] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The dynamics of two coupled oscillators can become quite complex if anharmonic potential energy functions are employed. This type of system therefore represents a good model for an investigation of the performance of mixed quantum-classical methods. In this work, the motion of two coupled particles with a mass ratio of one to ten is studied with three different mixed quantum-classical methods in the presence of anharmonic potential terms for a comparison with exact quantum mechanical calculations. The mixed quantum-classical approaches include the multitrajectory Ehrenfest, the mixed quantum-classical Bohmian (MQCB), and the so-called coupled Schrödinger equations (CSE) formalisms. The analysis shows that while the description of a weakly anharmonic system by the Ehrenfest and MQCB schemes is accurate if proper sampling techniques are applied, both approximations break down rapidly if the anharmonic terms are increased. The performance of the simple CSE prescription, which corresponds to a reduction of the full two-dimensional wave function to two one-dimensional wave functions representing two quantum oscillators coupled via the potential energy in a classical fashion, decreases if the width of the initial wave packet is enlarged. The dependence of the CSE method on the diffuseness of the initial wave packet is therefore opposite to that of the MQCB method, which is more accurate for wide wave packets. Overall, the multitrajectory Ehrenfest ansatz is found to be most successful in reproducing the exact quantum results.
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Affiliation(s)
- Jingrui Li
- Theoretical Chemistry, Department of Chemistry, Technical University Munich, D-85747 Garching, Germany.
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45
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Chu TS, Zhang Y, Han KL. The time-dependent quantum wave packet approach to the electronically nonadiabatic processes in chemical reactions. INT REV PHYS CHEM 2006. [DOI: 10.1080/01442350600677929] [Citation(s) in RCA: 416] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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46
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47
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Yamazaki S, Kato S. Locating the lowest free-energy point on conical intersection in polar solvent: Reference interaction site model self-consistent field study of ethylene and CH2NH2+. J Chem Phys 2005; 123:114510. [PMID: 16392576 DOI: 10.1063/1.2038867] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We present a theoretical method for locating the lowest free-energy points on conical intersections (CIs) in solution using the reference interaction site model self-consistent field (RISM-SCF) theory. Based on the linear-response theory, the nonequilibrium free energy is defined as a quadratic function of solvation coordinates, the parameters in which are directly obtained by ab initio RISM-SCF calculations. This free energy is easily incorporated into an efficient CI optimization procedure in gas phase. The present method is applied to the cis-trans photoisomerizations of ethylene and methaniminium cation (CH2NH2(+)) in polar solvents. We show that the geometries and energies of CIs are largely affected by the solute-solvent electrostatic interaction. In particular, the hydrogen migration of ethylene observed at CIs in the gas phase disappears in protic solvents due to the large stabilization of the zwitterionic state.
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Affiliation(s)
- Shohei Yamazaki
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa, Japan
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48
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De Vico L, Olivucci M, Lindh R. New General Tools for Constrained Geometry Optimizations. J Chem Theory Comput 2005; 1:1029-37. [DOI: 10.1021/ct0500949] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Luca De Vico
- Department of Theoretical Chemistry, Lund University, Chemical Centre, P.O. Box 124, S-221 00 Lund, Sweden
| | - Massimo Olivucci
- Dipartimento di Chimica, Università di Siena, via A. De Gasperi 2, I-53100 Siena, Italy, and Centro per lo Studio dei Sistemi Complessi, Via Tommaso Pendola 37, I-53100 Siena, Italy
| | - Roland Lindh
- Department of Chemical Physics, Lund University, Chemical Centre, P.O. Box 124, S-221 00 Lund, Sweden
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49
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Cembran A, Bernardi F, Olivucci M, Garavelli M. The retinal chromophore/chloride ion pair: structure of the photoisomerization path and interplay of charge transfer and covalent states. Proc Natl Acad Sci U S A 2005; 102:6255-60. [PMID: 15855270 PMCID: PMC1088357 DOI: 10.1073/pnas.0408723102] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Ab initio multi-reference second-order perturbation theory computations are used to explore the photochemical behavior of two ion pairs constituted by a chloride counterion interacting with either a rhodopsin or bacteriorhodopsin chromophore model (i.e., the 4-cis-gamma-methylnona-2,4,6,8-tetraeniminium and all-trans-nona-2,4,6,8-tetraeniminium cations, respectively). Significant counterion effects on the structure of the photoisomerization paths are unveiled by comparison with the paths of the same chromophores in vacuo. Indeed, we demonstrate that the counterion (i) modulates the relative stability of the S0, S1, and S2 energy surfaces leading to an S1 isomerization energy profile where the S1 and S2 states are substantially degenerate; (ii) leads to the emergence of significant S1 energy barriers along all of the isomerization paths except the one mimicking the 11-cis --> all-trans isomerization of the rhodopsin chromophore model; and (iii) changes the nature of the S1 --> S0 decay funnel that becomes a stable excited state minimum when the isomerizing double bond is located at the center of the chromophore moiety. We show that these (apparently very different) counterion effects can be rationalized on the basis of a simple qualitative electrostatic model, which also provides a crude basis for understanding the behavior of retinal protonated Schiff bases in solution.
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Affiliation(s)
- Alessandro Cembran
- Dipartimento di Chimica G. Ciamician, Università di Bologna, Via Selmi 2, I-40126 Bologna, Italy
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50
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Jasper AW, Truhlar DG. Conical intersections and semiclassical trajectories: Comparison to accurate quantum dynamics and analyses of the trajectories. J Chem Phys 2005; 122:44101. [PMID: 15740229 DOI: 10.1063/1.1829031] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Semiclassical trajectory methods are tested for electronically nonadiabatic systems with conical intersections. Five triatomic model systems are presented, and each system features two electronic states that intersect via a seam of conical intersections (CIs). Fully converged, full-dimensional quantum mechanical scattering calculations are carried out for all five systems at energies that allow for electronic de-excitation via the seam of CIs. Several semiclassical trajectory methods are tested against the accurate quantum mechanical results. For four of the five model systems, the diabatic representation is the preferred (most accurate) representation for semiclassical trajectories, as correctly predicted by the Calaveras County criterion. Four surface hopping methods are tested and have overall relative errors of 40%-60%. The semiclassical Ehrenfest method has an overall error of 66%, and the self-consistent decay of mixing (SCDM) and coherent switches with decay of mixing (CSDM) methods are the most accurate methods overall with relative errors of approximately 32%. Furthermore, the CSDM method is less representation dependent than both the SCDM and the surface hopping methods, making it the preferred semiclassical trajectory method. Finally, the behavior of semiclassical trajectories near conical intersections is discussed.
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Affiliation(s)
- Ahren W Jasper
- Department of Chemistry and Supercomputing Institute, University of Minnesota, Minneapolis, MN 55455-0431, USA
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