Photosystem I gene cassettes are present in marine virus genomes

Itai Sharon, Ariella Alperovitch, Forest Rohwer, Matthew Haynes, Fabian Glaser, Nof Atamna-Ismaeel, Ron Y. Pinter, Frédéric Partensky, Eugene V. Koonin, Yuri I. Wolf, Nathan Nelson and Oded Béjà ()
Additional contact information
Itai Sharon: Faculty of Biology,
Ariella Alperovitch: Faculty of Biology,
Forest Rohwer: Department of Biology,
Matthew Haynes: Department of Biology,
Fabian Glaser: Bioinformatics Knowledge Unit, Lorry I. Lokey Interdisciplinary Center for Life Sciences and Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel
Nof Atamna-Ismaeel: Faculty of Biology,
Ron Y. Pinter: Faculty of Computer Science,
Frédéric Partensky: CNRS and UPMC-Université Paris 6 (UMR 7144), Station Biologique, 29682 Roscoff, France
Eugene V. Koonin: National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, Maryland 20894, USA
Yuri I. Wolf: National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, Maryland 20894, USA
Nathan Nelson: George S. Wise Faculty of Life Sciences, Daniella Rich Institute for Structural Biology, Tel Aviv University
Oded Béjà: Faculty of Biology,

Nature, 2009, vol. 461, issue 7261, 258-262

Abstract: Photosystems at the double Like plant chloroplasts, the photosynthetic membranes of marine cyanobacteria contain two photosystems: photosystem II (PSII) mediates electron transfer from water to plastoquinones and PSI mediates electron transfer from plastocyanin to ferredoxin, thereby generating reducing power needed for CO2 fixation in the form of NADPH. Core PSII genes were recently found in cyanophages, viruses that infect cyanobacteria, where they presumably supplement the host's photosynthetic abilities. Now a trawl through metagenomic data from the Sorcerer II Global Ocean Sampling Expedition and through viral biomes reveals that PSI components are also present in cyanophages, presumably also contributing to overall photosynthetic performance.

Date: 2009
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DOI: 10.1038/nature08284

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