Hess W R, Weihe A, Loiseaux-de Goër S, Partensky F, Vaulot D
Humboldt University, Department of Biology, Berlin, Germany.
Plant Mol Biol. 1995 Mar;27(6):1189-96. doi: 10.1007/BF00020892.
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.
分析了来自丰富海洋原核生物海生聚球藻CCMP 1375的psbA基因的DNA序列、拷贝数、表达及系统发育相关性。高等植物和荷兰原绿丝藻D1蛋白C末端附近缺失的7个氨基酸存在于推导的氨基酸序列中。海生聚球藻仅含有一个psbA基因。因此，与几种蓝细菌不同，该生物缺乏通过用一种类型的D1替换另一种来适应其光系统II的能力。系统发育树表明，来自聚球藻PCC 7942的D1-1同工型是下一个相关的D1蛋白，并将海生聚球藻与荷兰原绿丝藻在蓝细菌中分开排列。
