Spectral properties of chlorines and electron transfer with their participation in the photosynthetic reaction center of photosystem II

Shchupak, E. E.; Ivashin, N. V.

doi:10.1134/s0030400x14020210

Opt. Spectrosc.

2014

DOI: 10.1134/s0030400x14020210

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Spectral properties of chlorines and electron transfer with their participation in the photosynthetic reaction center of photosystem II

E. E. Shchupak

N. V. Ivashin

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Cited by 2 publications

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“…Understanding how the excitation energy is trapped and transferred in the PSII RC is an essential prerequisite to understand the subsequent preferential electron transfer pathway. Extensive experimental and theoretical studies have attempted to identify the underlying functional states during these processes 7 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 . Optical spectroscopy is a powerful tool to study the electron and energy transfer processes.…”

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Dynamic protein conformations preferentially drive energy transfer along the active chain of the photosystem II reaction centre

et al. 2014

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One longstanding puzzle concerning photosystem II, a core component of photosynthesis, is that only one of the two symmetric branches in its reaction centre is active in electron transfer. To investigate the effect of the photosystem II environment on the preferential selection of the energy transfer pathway (a prerequisite for electron transfer), we have constructed an exciton model via extensive molecular dynamics simulations and quantum mechanics/molecular mechanics calculations based on a recent X-ray structure. Our results suggest that it is essential to take into account an ensemble of protein conformations to accurately compute the site energies. We identify the cofactor CLA606 of active chain as the most probable site for the energy excitation. We further pinpoint a number of charged protein residues that collectively lower the CLA606 site energy. Our work provides insights into the understanding of molecular mechanisms of the core machinery of the green-plant photosynthesis.

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Dynamic protein conformations preferentially drive energy transfer along the active chain of the photosystem II reaction centre

et al. 2014

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The nature of the lower excited state of the special pair of bacterial photosynthetic reaction center of Rhodobacter Sphaeroides and the dynamics of primary charge separation

Ivashin

Shchupak

2016

Opt. Spectrosc.

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Spectral properties of chlorines and electron transfer with their participation in the photosynthetic reaction center of photosystem II

Cited by 2 publications

References 32 publications

Dynamic protein conformations preferentially drive energy transfer along the active chain of the photosystem II reaction centre

Dynamic protein conformations preferentially drive energy transfer along the active chain of the photosystem II reaction centre

The nature of the lower excited state of the special pair of bacterial photosynthetic reaction center of Rhodobacter Sphaeroides and the dynamics of primary charge separation

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