Structure and function of photosystem I: Interaction with its soluble electron carriers and external antenna systems

Petra Fromme, Alexander Melkozernov, Patrick Jordan, Norbert Krauss

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128 Citations (Scopus)


Photosystem I (PS I) is a large membrane protein complex that catalyzes the first step of solar conversion, the light-induced transmembrane electron transfer, and generates reductants for CO2 assimilation. It consists of 12 different proteins and 127 cofactors that perform light capturing and electron transfer. The function of PS I includes inter-protein electron transfer between PS I and smaller soluble electron transfer proteins. The structure of PS I is discussed with respect to the potential docking sites for the soluble electron acceptors, ferredoxin/flavodoxin, at the stromal side and the soluble electron donors, cytochrome c6/plastocyanin, at the luminal side of the PS I complex. Furthermore, the potential interaction sites with the peripheral antenna proteins are discussed.

Original languageEnglish
Pages (from-to)40-44
Number of pages5
JournalFEBS Letters
Issue number1
Publication statusPublished - Nov 27 2003



  • Antenna
  • Ferredoxin
  • Photosynthesis
  • Photosystem I
  • Plastocyanin

ASJC Scopus subject areas

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology

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