Viral photosynthetic reaction center genes and transcripts in the marine environment
Viral photosynthetic reaction center genes and transcripts in the marine environment
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DOI：
10.1038/ismej.2007.67
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发表时间：
2007-10-01
期刊：
影响因子：
11
通讯作者：
Beja, Oded
中科院分区：
文献类型：
--
作者：
Sharon, Itai;Tzahor, Shani;Beja, Oded
聚球藻属和原绿球藻属的蓝细菌是开放海洋中光合生产力的重要贡献者。发现的基因（psbA，psbD），编码关键的光系统II蛋白（D1，D2）的基因组中感染这些蓝藻提出了新的模式，光合作用的调节，功能和进化的广阔的远洋生态系统。噬菌体光合作用基因的流行和表达的报告，和进化数据显示噬菌体和宿主基因的潜在重组，提出了一个模型，其中噬菌体光合作用基因有助于支持光合作用活性在其主机在感染过程中。在这里，使用宏基因组数据在天然海洋样品中，我们表明，约60%的psbA基因在地表水沿着全球海洋采样断面的噬菌体起源，和噬菌体基因正在经历一个独立的选择不同的D1蛋白。此外，我们表明，不同的病毒psbA基因在环境中表达。
Cyanobacteria of the genera Synechococcus and Prochlorococcus are important contributors to photosynthetic productivity in the open ocean. The discovery of genes (psbA, psbD) that encode key photosystem II proteins (D1, D2) in the genomes of phages that infect these cyanobacteria suggests new paradigms for the regulation, function and evolution of photosynthesis in the vast pelagic ecosystem. Reports on the prevalence and expression of phage photosynthesis genes, and evolutionary data showing a potential recombination of phage and host genes, suggest a model in which phage photosynthesis genes help support photosynthetic activity in their hosts during the infection process. Here, using metagenomic data in natural ocean samples, we show that about 60% of the psbA genes in surface water along the global ocean sampling transect are of phage origin, and that the phage genes are undergoing an independent selection for distinct D1 proteins. Furthermore, we show that different viral psbA genes are expressed in the environment.