Oxygen evolution in the thylakoid-lacking cyanobacterium Gloeobacter violaceus PCC 7421.
作者： Kohei Koyama , Hiroyuki Suzuki , Takumi Noguchi , Seiji Akimoto , Tohru Tsuchiya
DOI: 10.1016/J.BBABIO.2008.01.009
关键词: DCMU 、 Photosystem II 、 Oxygen evolution 、 Amino acid 、 Cyanobacteria 、 Biophysics 、 Thylakoid 、 Periplasmic space 、 Biology 、 Recombination 、 Photochemistry
摘要: Abstract The oxygen-evolving reactions of the thylakoid-lacking cyanobacterium Gloeobacter violaceus PCC 7421 were compared with those Synechocystis sp. 6803. Four aspects considered: sequence conservation in three extrinsic proteins for oxygen evolution, steady-state activity, charge recombination reactions, i.e., thermoluminescence and oscillation patterns delayed luminescence on a second time scale fluorescence nanosecond at − 196 °C. Even though there significant differences between amino acid sequences G. 6803, activities similar. glow curves essentially identical two species, spectral profiles lifetimes also very These results indicate clearly that even are carried out periplasm by components altered sequences, essential reaction processes water oxidation highly conserved. In contrast, we observed changes reduction side photosystem II. Based these data, discuss activity .
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