Characterization of the single psbA gene of Prochlorococcus marinus CCMP 1375 (Prochlorophyta) |
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Authors: | Wolfgang R Hess Andreas Weihe Susan Loiseaux-de Goër Frédéric Partensky Daniel Vaulot |
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Institution: | (1) Department of Biology, Humboldt University, Invalidenstrasse 43, D-10115 Berlin, Germany;(2) Observatoire Océanologique de Roscoff CNRS-UPR 4601, BP 74, F-29680 Roscoff Cedex, France |
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Abstract: | DNA sequence, copy number, expression and phylogenetic relevance of the psbA gene from the abundant marine prokaryote P. marinus CCMP 1375 was analyzed. The 7 amino acids near the C-terminus missing in higher plant and in Prochlorothrix hollandica D1 proteins are present in the derived amino acid sequence. P. marinus contains only a single psbA gene. Thus, this organism lacks the ability to adapt its photosystem II by replacement of one type of D1 by another, as several cyanobacteria do. Phylogenetic trees suggested the D1-1 iso-form from Synechococcus PCC 7942 as the next related D1 protein and place P. Marinus separately from Prochlorothrix hollandica among the cyanobacteria. |
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Keywords: | Cyanobacteria gene copy number light regulation photosynthesis photosystem II reaction center polymerase chain reaction psbA |
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