Does the trimeric form of the Photosystem 1 reaction center of cyanobacteria in vivo exist? |
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Authors: | J Hladík D Sofrová |
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Institution: | (1) Department of Biochemistry, Faculty of Sciences, Charles University, Albertov 2030, 128 40 Prague 2, Czechoslovakia |
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Abstract: | When isolating Photosystem 1 from the thylakoid membranes of cyanobacteria, a multiplicity of photosystem complexes can be encountered, which has not yet been observed in any other phototrophic organisms: After solubilisation of thylakoid membranes with detergents, trimeric, dimeric and monomeric forms of Photosystem 1 can be separated. The question must now be answered, which of the stable Photosystem 1 forms is the functional form in vivo-monomeric or trimeric? The two possibilities are discussed, though we mainly present arguments for the existence of the trimeric form of Photosystem 1 in cyanobacterial thylakoid membranes. |
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Keywords: | cyanobacterium Photosystem 1 pigment-protein complex multiple forms monomer dimer trimer |
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