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, G Charles Dismukes, P. L. Dutton, M. Aukauloo, R. D. Britt, M. Iwaki

Research output: Contribution to journalArticle

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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.

Original languageEnglish
Pages (from-to)1471-1479
Number of pages9
JournalPhilosophical Transactions of the Royal Society B: Biological Sciences
Volume357
Issue number1426
DOIs
Publication statusPublished - Oct 29 2002

Fingerprint

Photosystem II Protein Complex
photosystem II
protons
electron transfer
Tyrosine
tyrosine
Protons
Electrons
oxidation
Oxidation
Water
Photosynthesis
water
Chlorophyll
Pigments
pigments
photosynthesis
chlorophyll

Keywords

  • Photochemistry
  • Photosystem II
  • Proton-coupled electron transfer
  • Ruthenium
  • Tyrosine

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Agricultural and Biological Sciences (miscellaneous)

Cite this

The mechanism for proton-coupled electron transfer from tyrosine in a model complex and comparisons with YZ oxidation in photosystem II. / Sjödin, Martin; Styring, Stenbjörn; Åkermark, Björn; Sun, Licheng; Hammarström, Leif; Melis, A.; Dismukes, G Charles; 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 journalArticle

Sjödin, Martin ; Styring, Stenbjörn ; Åkermark, Björn ; Sun, Licheng ; Hammarström, Leif ; Melis, A. ; Dismukes, G Charles ; 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 YZ 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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AU - Sun, Licheng

AU - Hammarström, Leif

AU - Melis, A.

AU - Dismukes, G Charles

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