Localization of two phylloquinones, Q(K) and Q(K)', in an improved electron density map of photosystem I at 4-Å resolution

Olaf Klukas, Wolf Dieter Schubert, Patrick Jordan, Norbert Krauß, Petra Fromme, Horst Tobias Witt, Wolfram Saenger

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

An improved electron density map of photosystem I from Synechococcus elongatus calculated at 4-Å resolution for the first time reveals a second phylloquinone molecule and thereby completes the set of cofactors constituting the electron transfer system of this iron-sulfur type photosynthetic reaction center: six chlorophyll a, two phylloquinones, and three Fe4S4 clusters. The location of the newly identified phylloquinone pair, the individual plane orientations of these molecules, and the resulting distances to other cofactors of the electron transfer system are discussed and compared with those determined by magnetic resonance techniques.

Original languageEnglish
Pages (from-to)7361-7367
Number of pages7
JournalJournal of Biological Chemistry
Volume274
Issue number11
DOIs
Publication statusPublished - Mar 12 1999

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Vitamin K 1
Photosystem I Protein Complex
Carrier concentration
Electrons
Photosynthetic Reaction Center Complex Proteins
Synechococcus
Molecules
Magnetic resonance
Sulfur
Magnetic Resonance Spectroscopy
Iron

ASJC Scopus subject areas

  • Biochemistry

Cite this

Localization of two phylloquinones, Q(K) and Q(K)', in an improved electron density map of photosystem I at 4-Å resolution. / Klukas, Olaf; Schubert, Wolf Dieter; Jordan, Patrick; Krauß, Norbert; Fromme, Petra; Witt, Horst Tobias; Saenger, Wolfram.

In: Journal of Biological Chemistry, Vol. 274, No. 11, 12.03.1999, p. 7361-7367.

Research output: Contribution to journalArticle

Klukas, Olaf ; Schubert, Wolf Dieter ; Jordan, Patrick ; Krauß, Norbert ; Fromme, Petra ; Witt, Horst Tobias ; Saenger, Wolfram. / Localization of two phylloquinones, Q(K) and Q(K)', in an improved electron density map of photosystem I at 4-Å resolution. In: Journal of Biological Chemistry. 1999 ; Vol. 274, No. 11. pp. 7361-7367.
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