|A global ocean atlas of eukaryotic genes |
Auteur(s): Carradec Quentin, Pelletier Eric, Da Silva Corinne, Alberti Adriana, Seeleuthner Yoann, Blanc-Mathieu Romain, Lima-Mendez Gipsi, Rocha Fabio, Tirichine Leila, Labadie Karine, Kirilovsky Amos, Bertrand Alexis, Engelen Stefan, Madoui Mohammed-Amin, Méheust Raphaël, Poulain Julie, Romac Sarah, Richter Daniel, Yoshikawa Genki, Dimier Céline, Kandels-Lewis Stefanie, Picheral Marc, Searson Sarah, Jaillon Olivier, Aury Jean-Marc, Karsenti Eric, Sullivan Matthew, Sunagawa Shinichi, Bork Peer, Hingamp P.
(Article) Publié: Nature Communications, vol. 9 p.373 (2018)
Ref HAL: cea-01874711_v1
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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.