Photosynthesis Research

, Volume 104, Issue 2–3, pp 305–319

An overview on chlorophylls and quinones in the photosystem I-type reaction centers

  • Shunsuke Ohashi
  • Tatsuya Iemura
  • Naoki Okada
  • Shingo Itoh
  • Hayato Furukawa
  • Masaaki Okuda
  • Mayumi Ohnishi-Kameyama
  • Takuro Ogawa
  • Hideaki Miyashita
  • Tadashi Watanabe
  • Shigeru Itoh
  • Hirozo Oh-oka
  • Kazuhito Inoue
  • Masami Kobayashi
Review

DOI: 10.1007/s11120-010-9530-3

Cite this article as:
Ohashi, S., Iemura, T., Okada, N. et al. Photosynth Res (2010) 104: 305. doi:10.1007/s11120-010-9530-3

Abstract

Minor but key chlorophylls (Chls) and quinones in photosystem (PS) I-type reaction centers (RCs) are overviewed in regard to their molecular structures. In the PS I-type RCs, the prime-type chlorophylls, namely, bacteriochlorophyll (BChl) a′ in green sulfur bacteria, BChl g′ in heliobacteria, Chl a′ in Chl a-type PS I, and Chl d′ in Chl d-type PS I, function as the special pairs, either as homodimers, (BChl a′)2 and (BChl g′)2 in anoxygenic organisms, or heterodimers, Chl a/a′ and Chl d/d′ in oxygenic photosynthesis. Conversions of BChl g to Chl a and Chl a to Chl d take place spontaneously under mild condition in vitro. The primary electron acceptors, A0, are Chl a-derivatives even in anoxygenic PS I-type RCs. The secondary electron acceptors are naphthoquinones, whereas the side chains may have been modified after the birth of cyanobacteria, leading to succession from menaquinone to phylloquinone in oxygenic PS I.

Keywords

Bacteriochlorophyll g Chlorophyll a Green sulfur bacteria Heliobacteria Menaquinone Photosystem I 

Abbreviations

BChl

Bacteriochlorophyll

BPhe

Bacteriopheophytin

Chl

Chlorophyll

HPLC

High performance liquid chromatography

MQ

Menaquinone

P700

The primary electron donor of photosystem I

P740

The primary electron donor of PS I in A. marina

P798

The primary electron donor of heliobacteria

P840

The primary electron donor of green sulfur bacteria

P870

The primary electron donor of purple bacteria

P960

The primary electron donor of bacteriochlorophyll b containing purple bacteria

Phe

Pheophytin

PhQ

Phylloquinone

PS

Photosystem

RC

Reaction center

Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Shunsuke Ohashi
    • 1
  • Tatsuya Iemura
    • 1
  • Naoki Okada
    • 1
  • Shingo Itoh
    • 1
  • Hayato Furukawa
    • 1
  • Masaaki Okuda
    • 1
  • Mayumi Ohnishi-Kameyama
    • 2
  • Takuro Ogawa
    • 3
  • Hideaki Miyashita
    • 4
  • Tadashi Watanabe
    • 5
  • Shigeru Itoh
    • 6
  • Hirozo Oh-oka
    • 7
  • Kazuhito Inoue
    • 3
  • Masami Kobayashi
    • 1
  1. 1.Institute of Materials ScienceUniversity of TsukubaTsukubaJapan
  2. 2.National Food Research InstituteTsukubaJapan
  3. 3.Department of Biological SciencesKanagawa UniversityHiratsukaJapan
  4. 4.Graduate School of Human and Environmental StudiesKyoto UniversityKyotoJapan
  5. 5.Institute of Industrial ScienceUniversity of Tokyo TokyoJapan
  6. 6.Division of Material Science, Graduate School of ScienceNagoya UniversityNagoyaJapan
  7. 7.Department of Biological Sciences, Graduate School of ScienceOsaka UniversityOsakaJapan

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