Pigment Composition in the Reaction Center Complex from the Thermophilic Green Sulfur Bacterium, Chlorobium tepidum : Carotenoid Glucoside Esters, Menaquinone and Chlorophylls

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概要

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• Distribution of pigments in the reaction center(RC) complex, chlorosomes and chlorosome-free membranes prepared from the green sulfur bacterium, Chlorobium tepidum, was analyzed. The RC complex contained approximately 40 molecules of bacteriochlorophyll(BChl)a per P840, half of which are estimated to be in the Fenna-Matthews-Olson(FMO) protein. Carotenes(2 molecules per P840)occupied only one third of the total carotenoids. The remaining carotenoids(4 to 5 molecules per P840) were OH-chlorobactene glucoside ester and OH-γ-carotene glucoside ester. Dihydrochlorobactene was decreased compared with cellular carotenes. Furthermore, approximately 9 C670 and 1 menaquinone-7 per P840 were also found. BChl c and carotenes, whose major component is chlorobactene, were found mainly in chlorosomes, and two kinds of carotenoid glucoside esters were observed in chlorosome-free membranes.

• 日本植物生理学会の論文

著者

• OH-OKA Hirozo

  Department of Biology, Graduate School of Science, Osaka University, Toyonaka

• Takaichi Shinichi

  Biological Laboratory, Nippon Medical School

• Takaichi Shinichi

  Biological Lab. Nippon Medical School

• Oh-oka Hirozo

  Department Of Biological Science Graduate School Of Science Osaka University

• Ohoka H

  Osaka Univ. Osaka Jpn

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