Constitution and energetics of photosystem i and photosystem II in the chlorophyll d-dominated cyanobacterium Acaryochloris marina

Tatsuya Tomo, Suleyman I. Allakhverdiev, Mamoru Mimuro

Research output: Contribution to journalReview article

21 Citations (Scopus)


This mini review presents current topics of discussion about photosystem (PS) I and PS II of photosynthesis in the Acaryochloris marina. A. marina is a photosynthetic cyanobacterium in which chlorophyll (Chl) d is the major antenna pigment (>95%). However, Chl a is always present in a few percent. Chl d absorbs light with a wavelength up to 30 nm red-shifted from Chl a. Therefore, the chlorophyll species of the special pair in PS II has been a matter of debate because if Chl d was the special pair component, the overall energetics must be different in A. marina. The history of this field indicates that a purified sample is necessary for the reliable identification and characterization of the special pair. In view of the spectroscopic data and the redox potential of pheophytin, we discuss the nature of special pair constituents and the localization of the enigmatic Chl a.

Original languageEnglish
Pages (from-to)333-340
Number of pages8
JournalJournal of Photochemistry and Photobiology B: Biology
Issue number1-2
Publication statusPublished - Jan 1 2011



  • Acaryochloris
  • Chlorophyll d
  • Energetics
  • Photosystem
  • Reaction center
  • Redox potential

ASJC Scopus subject areas

  • Radiation
  • Radiological and Ultrasound Technology
  • Biophysics
  • Radiology Nuclear Medicine and imaging

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