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A global ocean atlas of eukaryotic genes

Quentin Carradec 1, 2 Eric Pelletier 2, 1 Corinne da Silva 3, 1 Adriana A. Alberti 2, 1 Yoann Seeleuthner 1, 2 Romain Blanc-Mathieu 4 Gipsi Lima-Mendez 5 Fabio Rocha 6 Leila Tirichine 6 Karine Labadie 2, 1 Amos Kirilovsky 6, 2, 1 Alexis Bertrand 2, 1 Stefan Engelen 1, 2 Mohammed-Amin Madoui 2, 1 Raphaël Méheust 6 Julie Poulain 2, 1 Sarah Romac 7 Daniel Richter 8, 7 Genki Yoshikawa 4 Céline Dimier 6, 7 Stefanie Kandels-Lewis 9 Marc Picheral 10 Sarah Searson 11 Olivier Jaillon 2, 1 Jean-Marc Aury 2, 1 Eric Karsenti 6 Matthew Sullivan 12 Shinichi Sunagawa 13 Peer Bork 13 Fabrice Not 14, 7 Pascal Hingamp 15 Jeroen J. Raes 5 Lionel Guidi 10 Hiroyuki Ogata 16, 4 Colomban de Vargas 17, 7 Daniele Iudicone 18 Chris Bowler 6 Patrick Wincker 2, 1 Jean Weissenbach 2, 1 
Abstract : While our knowledge about the roles of microbes and viruses in the ocean has increased tremendously due to recent advances in genomics and metagenomics, research on marine microbial eukaryotes and zooplankton has benefited much less from these new technologies because of their larger genomes, their enormous diversity, and largely unexplored physiologies. Here, we use a metatranscriptomics approach to capture expressed genes in open ocean Tara Oceans stations across four organismal size fractions. The individual sequence reads cluster into 116 million unigenes representing the largest reference collection of eukaryotic transcripts from any single biome. The catalog is used to unveil functions expressed by eukaryotic marine plankton, and to assess their functional biogeography. Almost half of the sequences have no similarity with known proteins, and a great number belong to new gene families with a restricted distribution in the ocean. Overall, the resource provides the foundations for exploring the roles of marine eukaryotes in ocean ecology and biogeochemistry.
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Quentin Carradec, Eric Pelletier, Corinne da Silva, Adriana A. Alberti, Yoann Seeleuthner, et al.. A global ocean atlas of eukaryotic genes. Nature Communications, 2018, 9 (1), pp.373. ⟨10.1038/s41467-017-02342-1⟩. ⟨cea-01874711⟩



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