Photosynthetic water oxidation. A new chemical model

Andrew Webber, Lee Spencer, Donald T. Sawyer, Robert L. Heath

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

A sequential four-step chemical model for the water oxidation process in photosystem II is presented, based on the observation that a peroxide-linked biquinone complex can be chemically formed as a result of hydroxide ion addition to quinone. In our model, the hydroxide ion intermediate is generated in photosystem II as a result of proton abstraction from water. In the model, the first two flashes of light raise the oxidation state of the bimanganese center, while the third and fourth flashes of light sequentially generate the peroxide-linked biquinone which is then directly oxidized by the bimanganese center to produce oxygen and regenerate quinone.

Original languageEnglish (US)
Pages (from-to)258-262
Number of pages5
JournalFEBS Letters
Volume189
Issue number2
DOIs
StatePublished - Sep 23 1985
Externally publishedYes

Fingerprint

Chemical Models
Photosystem II Protein Complex
Peroxides
Light
Oxidation
Water
Protons
Oxygen
hydroxide ion
benzoquinone

Keywords

  • b
  • Cytochrome
  • Manganese
  • Oxygen evolution mechanism
  • Photosystem II
  • Plastoquinone

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Molecular Biology

Cite this

Photosynthetic water oxidation. A new chemical model. / Webber, Andrew; Spencer, Lee; Sawyer, Donald T.; Heath, Robert L.

In: FEBS Letters, Vol. 189, No. 2, 23.09.1985, p. 258-262.

Research output: Contribution to journalArticle

Webber, A, Spencer, L, Sawyer, DT & Heath, RL 1985, 'Photosynthetic water oxidation. A new chemical model', FEBS Letters, vol. 189, no. 2, pp. 258-262. https://doi.org/10.1016/0014-5793(85)81035-8
Webber, Andrew ; Spencer, Lee ; Sawyer, Donald T. ; Heath, Robert L. / Photosynthetic water oxidation. A new chemical model. In: FEBS Letters. 1985 ; Vol. 189, No. 2. pp. 258-262.
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