The Genome of the Diatom Thalassiosira Pseudonana : Ecology, Evolution, and Metabolism

Author:

Armbrust E. Virginia12345,Berges John A.12345,Bowler Chris12345,Green Beverley R.12345,Martinez Diego12345,Putnam Nicholas H.12345,Zhou Shiguo12345,Allen Andrew E.12345,Apt Kirk E.12345,Bechner Michael12345,Brzezinski Mark A.12345,Chaal Balbir K.12345,Chiovitti Anthony12345,Davis Aubrey K.12345,Demarest Mark S.12345,Detter J. Chris12345,Glavina Tijana12345,Goodstein David12345,Hadi Masood Z.12345,Hellsten Uffe12345,Hildebrand Mark12345,Jenkins Bethany D.12345,Jurka Jerzy12345,Kapitonov Vladimir V.12345,Kröger Nils12345,Lau Winnie W. Y.12345,Lane Todd W.12345,Larimer Frank W.12345,Lippmeier J. Casey12345,Lucas Susan12345,Medina Mónica12345,Montsant Anton12345,Obornik Miroslav12345,Parker Micaela Schnitzler12345,Palenik Brian12345,Pazour Gregory J.12345,Richardson Paul M.12345,Rynearson Tatiana A.12345,Saito Mak A.12345,Schwartz David C.12345,Thamatrakoln Kimberlee12345,Valentin Klaus12345,Vardi Assaf12345,Wilkerson Frances P.12345,Rokhsar Daniel S.12345

Affiliation:

1. School of Oceanography, University of Washington, Seattle, WA 98195, USA.

2. Department of Biological Sciences, University of Wisconsin–Milwaukee, Milwaukee, WI 53201, USA.

3. Laboratory of Molecular Plant Biology, Stazione Zoologica, Villa Comunale, I 80121 Naples, Italy. Organismes Photosynthétiques et Environnement, Département de Biologie, 75230 Paris, France.

4. Ecole Normale Supérieure, 75230 Paris, France.

5. Department of Botany, University of British Columbia, Vancouver, B.C., Canada, V6T 1Z4.

Abstract

Diatoms are unicellular algae with plastids acquired by secondary endosymbiosis. They are responsible for ∼20% of global carbon fixation. We report the 34 million–base pair draft nuclear genome of the marine diatom Thalassiosira pseudonana and its 129 thousand–base pair plastid and 44 thousand–base pair mitochondrial genomes. Sequence and optical restriction mapping revealed 24 diploid nuclear chromosomes. We identified novel genes for silicic acid transport and formation of silica-based cell walls, high-affinity iron uptake, biosynthetic enzymes for several types of polyunsaturated fatty acids, use of a range of nitrogenous compounds, and a complete urea cycle, all attributes that allow diatoms to prosper in aquatic environments.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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