The mechanism for proton-coupled electron transfer from tyrosine in a model complex and comparisons with YZ oxidation in photosystem II

Martin Sjödin; Stenbjörn Styring; Björn Åkermark; Licheng Sun; Leif Hammarström; A. Melis; C. Dismukes; P. L. Dutton; M. Aukauloo; R. D. Britt; M. Iwaki

doi:10.1098/rstb.2002.1142

The mechanism for proton-coupled electron transfer from tyrosine in a model complex and comparisons with Y_Z oxidation in photosystem II

Martin Sjödin, Stenbjörn Styring, Björn Åkermark, Licheng Sun, Leif Hammarström, A. Melis, C. Dismukes, P. L. Dutton, M. Aukauloo, R. D. Britt, M. Iwaki

Research output: Contribution to journal › Article

50 Citations (Scopus)

Abstract

In the water-oxidizing reactions of photosystem II (PSII), a tyrosine residue plays a key part as an intermediate electron-transfer reactant between the primary donor chlorophylls (the pigment P₆₈₀) and the water-oxidizing Mn cluster. The tyrosine is deprotonated upon oxidation, and the coupling between the proton reaction and electron transfer is of great mechanistic importance for the understanding of the water-oxidation mechanism. Within a programme on artificial photosynthesis, we have made and studied the proton-coupled tyrosine oxidation in a model system and been able to draw mechanistic conclusions that we use to interpret the analogous reactions in PSII.

Original language	English
Pages (from-to)	1471-1479
Number of pages	9
Journal	Philosophical Transactions of the Royal Society B: Biological Sciences
Volume	357
Issue number	1426
DOIs	https://doi.org/10.1098/rstb.2002.1142
Publication status	Published - 2002 Oct 29
Externally published	Yes

Keywords

Photochemistry
Photosystem II
Proton-coupled electron transfer
Ruthenium
Tyrosine

ASJC Scopus subject areas

Biochemistry, Genetics and Molecular Biology(all)
Agricultural and Biological Sciences(all)

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Sjödin, M., Styring, S., Åkermark, B., Sun, L., Hammarström, L., Melis, A., Dismukes, C., Dutton, P. L., Aukauloo, M., Britt, R. D., & Iwaki, M. (2002). The mechanism for proton-coupled electron transfer from tyrosine in a model complex and comparisons with Y_Z oxidation in photosystem II. Philosophical Transactions of the Royal Society B: Biological Sciences, 357(1426), 1471-1479. https://doi.org/10.1098/rstb.2002.1142

The mechanism for proton-coupled electron transfer from tyrosine in a model complex and comparisons with Y_Z oxidation in photosystem II. / Sjödin, Martin; Styring, Stenbjörn; Åkermark, Björn; Sun, Licheng; Hammarström, Leif; Melis, A.; Dismukes, C.; Dutton, P. L.; Aukauloo, M.; Britt, R. D.; Iwaki, M.

In: Philosophical Transactions of the Royal Society B: Biological Sciences, Vol. 357, No. 1426, 29.10.2002, p. 1471-1479.

Research output: Contribution to journal › Article

Sjödin, M, Styring, S, Åkermark, B, Sun, L, Hammarström, L, Melis, A, Dismukes, C, Dutton, PL, Aukauloo, M, Britt, RD & Iwaki, M 2002, 'The mechanism for proton-coupled electron transfer from tyrosine in a model complex and comparisons with Y_Z oxidation in photosystem II', Philosophical Transactions of the Royal Society B: Biological Sciences, vol. 357, no. 1426, pp. 1471-1479. https://doi.org/10.1098/rstb.2002.1142

Sjödin, Martin ; Styring, Stenbjörn ; Åkermark, Björn ; Sun, Licheng ; Hammarström, Leif ; Melis, A. ; Dismukes, C. ; Dutton, P. L. ; Aukauloo, M. ; Britt, R. D. ; Iwaki, M. / The mechanism for proton-coupled electron transfer from tyrosine in a model complex and comparisons with Y_Z oxidation in photosystem II. In: Philosophical Transactions of the Royal Society B: Biological Sciences. 2002 ; Vol. 357, No. 1426. pp. 1471-1479.

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abstract = "In the water-oxidizing reactions of photosystem II (PSII), a tyrosine residue plays a key part as an intermediate electron-transfer reactant between the primary donor chlorophylls (the pigment P680) and the water-oxidizing Mn cluster. The tyrosine is deprotonated upon oxidation, and the coupling between the proton reaction and electron transfer is of great mechanistic importance for the understanding of the water-oxidation mechanism. Within a programme on artificial photosynthesis, we have made and studied the proton-coupled tyrosine oxidation in a model system and been able to draw mechanistic conclusions that we use to interpret the analogous reactions in PSII.",

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AU - Dismukes, C.

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