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

作者：Ohashi Shunsuke; Iemura Tatsuya; Okada Naoki; Itoh Shingo; Furukawa Hayato; Okuda Masaaki; Ohnishi Kameyama Mayumi; Ogawa Takuro; Miyashita Hideaki; Watanabe Tadashi; Itoh Shigeru; Oh oka Hirozo; Inoue Kazuhito; Kobayashi Masami^*

来源：Photosynthesis Research, 2010, 104(2-3): 305-319.

DOI：10.1007/s11120-010-9530-3

• Bacteriochlorophyll g
• Chlorophyll a
• Green sulfur bacteria
• Heliobacteria
• Menaquinone
• Photosystem I

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, A (0), 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.

• 出版日期2010-6