Excitation Energy Transfer by Coherent and Incoherent Mechanisms in the Peridinin–Chlorophyll <i>a</i> Protein

Ghosh, Soumen; Bishop, Michael M.; Roscioli, Jerome D.; LaFountain, Amy M.; Frank, Harry A.; Beck, Warren F.

doi:10.1021/acs.jpclett.6b02881

Cited by 27 publications

(55 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To check for the presence of electronic coherences between Per and Chl states, whose relevance has been recently suggested in the literature 24 , 25 , the beating behavior of the rephasing signal (recorded with laser 3) in the S 2 /Q y cross-peak region has been carefully scrutinized, applying a recently proposed method based on a time-frequency transform (TFT) analysis 38 , 39 . Given an oscillating trace, this analysis allows extracting not only the main frequency components contributing to the beating, as in conventional Fourier transform, but also their time behavior.…”

Section: Resultsmentioning

confidence: 99%

“…Like for other antenna complexes bearing Cars, femtosecond spectroscopic experiments on PCP have also suggested the presence of ultrafast channels of EET from S 2 to the Q bands of Chl 4 , 7 – 9 , 23 (Q x and/or vibronic states of Q y ), also with possible contributions of coherent pathways 24 , 25 . However, clear and direct evidence is still lacking to identify the main pathways of energy flow from Pers to Chls, and their timescales, including the role of vibrational modes on the dynamics.…”

Section: Introductionmentioning

confidence: 87%

See 1 more Smart Citation

Coherence in carotenoid-to-chlorophyll energy transfer

et al. 2018

View full text Add to dashboard Cite

The subtle details of the mechanism of energy flow from carotenoids to chlorophylls in biological light-harvesting complexes are still not fully understood, especially in the ultrafast regime. Here we focus on the antenna complex peridinin–chlorophyll a–protein (PCP), known for its remarkable efficiency of excitation energy transfer from carotenoids—peridinins—to chlorophylls. PCP solutions are studied by means of 2D electronic spectroscopy in different experimental conditions. Together with a global kinetic analysis and multiscale quantum chemical calculations, these data allow us to comprehensively address the contribution of the potential pathways of energy flow in PCP. These data support dominant energy transfer from peridinin S2 to chlorophyll Qy state via an ultrafast coherent mechanism. The coherent superposition of the two states is functional to drive population to the final acceptor state, adding an important piece of information in the quest for connections between coherent phenomena and biological functions.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 87%

Coherence in carotenoid-to-chlorophyll energy transfer

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Hence, the calculation of these parameters on the BChl of FMO protein is an important subject to study. We also note that the quantum coherence studies of the FMO complex have been reported in a number of works to elucidate the quantum mechanical time-dependent phenomenon associated with the process of photosynthesis [32][33][34][35][36][37][38][39][40][41][42]. Moreover, the mutation of the FMO light harvesting complex can cause changes in the observed phenomenon of quantum coherence.…”

Section: Introductionmentioning

confidence: 80%

Analysis of Photosynthetic Systems and Their Applications with Mathematical and Computational Models

2020

View full text Add to dashboard Cite

In biological and life science applications, photosynthesis is an important process that involves the absorption and transformation of sunlight into chemical energy. During the photosynthesis process, the light photons are captured by the green chlorophyll pigments in their photosynthetic antennae and further funneled to the reaction center. One of the most important light harvesting complexes that are highly important in the study of photosynthesis is the membrane-attached Fenna–Matthews–Olson (FMO) complex found in the green sulfur bacteria. In this review, we discuss the mathematical formulations and computational modeling of some of the light harvesting complexes including FMO. The most recent research developments in the photosynthetic light harvesting complexes are thoroughly discussed. The theoretical background related to the spectral density, quantum coherence and density functional theory has been elaborated. Furthermore, details about the transfer and excitation of energy in different sites of the FMO complex along with other vital photosynthetic light harvesting complexes have also been provided. Finally, we conclude this review by providing the current and potential applications in environmental science, energy, health and medicine, where such mathematical and computational studies of the photosynthesis and the light harvesting complexes can be readily integrated.

show abstract

“…These results, however, are very sensitive to the employed computational approach, since the lowest excited state of carotenoids is very difficult to assess [ 78 ]. Still, experimental evidence for the theoretically modelled type of mixed EET (with S 2 preference) exists [ 79 ].…”

Section: The Photosynthetic Apparatus Of Plants (And Algae)mentioning

confidence: 99%

Photosynthetic Light-Harvesting (Antenna) Complexes—Structures and Functions

2021

View full text Add to dashboard Cite

Chlorophylls and bacteriochlorophylls, together with carotenoids, serve, noncovalently bound to specific apoproteins, as principal light-harvesting and energy-transforming pigments in photosynthetic organisms. In recent years, enormous progress has been achieved in the elucidation of structures and functions of light-harvesting (antenna) complexes, photosynthetic reaction centers and even entire photosystems. It is becoming increasingly clear that light-harvesting complexes not only serve to enlarge the absorption cross sections of the respective reaction centers but are vitally important in short- and long-term adaptation of the photosynthetic apparatus and regulation of the energy-transforming processes in response to external and internal conditions. Thus, the wide variety of structural diversity in photosynthetic antenna “designs” becomes conceivable. It is, however, common for LHCs to form trimeric (or multiples thereof) structures. We propose a simple, tentative explanation of the trimer issue, based on the 2D world created by photosynthetic membrane systems.

show abstract

Excitation Energy Transfer by Coherent and Incoherent Mechanisms in the Peridinin–Chlorophyll a Protein

Cited by 27 publications

References 51 publications

Coherence in carotenoid-to-chlorophyll energy transfer

Coherence in carotenoid-to-chlorophyll energy transfer

Analysis of Photosynthetic Systems and Their Applications with Mathematical and Computational Models

Photosynthetic Light-Harvesting (Antenna) Complexes—Structures and Functions

Contact Info

Product

Resources

About