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The tiny eukaryote Ostreococcus provides genomic insights into the paradox of plankton speciation

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Abstract
The smallest known eukaryotes, at approximate to 1-mu m diameter, are ostreococcus tauri and related species of marine phytoplankton. The genome of Ostreococcus lucimarinus has been completed and compared with that of O. tauri. This comparison reveals surprising differences across orthologous chromosomes in the two species from highly syntenic chromosomes in most cases to chromosomes with almost no similarity. Species divergence in these phytoplankton is occurring through multiple mechanisms acting differently on different chromosomes and likely including acquisition of new genes through horizontal gene transfer. We speculate that this latter process may be involved in altering the cell-surface characteristics of each species. In addition, the genome of O. lucimarinus provides insights into the unique metal metabolism of these organisms, which are predicted to have a large number of selenocysteine-containing proteins. Selenoenzymes are more catalytically active than similar enzymes lacking selenium, and thus the cell may require less of that protein. As reported here, selenoenzymes, novel fusion proteins, and loss of some major protein families including ones associated with chromatin are likely important adaptations for achieving a small cell size.
Keywords
SYSTEM, EVOLUTION, TOOL, DNA, SELENOCYSTEINE, MARINE, CHLAMYDOMONAS-REINHARDTII, selenium, MOLECULAR-MECHANISMS, DIVERSITY, green algae, picoeukaryote, genome evolution, CYTOCHROME-C BIOGENESIS, synteny

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Citation

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MLA
Palenik, Brian, Jane Grimwood, Andrea Aerts, et al. “The Tiny Eukaryote Ostreococcus Provides Genomic Insights into the Paradox of Plankton Speciation.” PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 104.18 (2007): 7705–7710. Print.
APA
Palenik, Brian, Grimwood, J., Aerts, A., Rouzé, P., Salamov, A., Putnam, N., Dupont, C., et al. (2007). The tiny eukaryote Ostreococcus provides genomic insights into the paradox of plankton speciation. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 104(18), 7705–7710.
Chicago author-date
Palenik, Brian, Jane Grimwood, Andrea Aerts, Pierre Rouzé, Asaf Salamov, Nicholas Putnam, Chris Dupont, et al. 2007. “The Tiny Eukaryote Ostreococcus Provides Genomic Insights into the Paradox of Plankton Speciation.” Proceedings of the National Academy of Sciences of the United States of America 104 (18): 7705–7710.
Chicago author-date (all authors)
Palenik, Brian, Jane Grimwood, Andrea Aerts, Pierre Rouzé, Asaf Salamov, Nicholas Putnam, Chris Dupont, Richard Jorgensen, Evelyne Derelle, Stephane Rombauts, Kemin Zhou, Robert Otillar, Sabeeha S Merchant, Sheila Podell, Terry Gaasterland, Carolyn Napoli, Karla Gendler, Andrea Manuell, Vera Tai, Olivier Vallon, Gwenael Piganeau, Séverine Jancek, Marc Heijde, Kamel Jabbari, Chris Bowler, Martin Lohr, Steven Robbens, Gregory Werner, Inna Dubchak, Gregory J Pazour, Qinghu Ren, Ian Paulsen, Chuck Delwiche, Jeremy Schmutz, Daniel Rokhsar, Yves Van de Peer, Hervé Moreau, and Igor V Grigoriev. 2007. “The Tiny Eukaryote Ostreococcus Provides Genomic Insights into the Paradox of Plankton Speciation.” Proceedings of the National Academy of Sciences of the United States of America 104 (18): 7705–7710.
Vancouver
1.
Palenik B, Grimwood J, Aerts A, Rouzé P, Salamov A, Putnam N, et al. The tiny eukaryote Ostreococcus provides genomic insights into the paradox of plankton speciation. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. 2007;104(18):7705–10.
IEEE
[1]
B. Palenik et al., “The tiny eukaryote Ostreococcus provides genomic insights into the paradox of plankton speciation,” PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, vol. 104, no. 18, pp. 7705–7710, 2007.
@article{410299,
  abstract     = {The smallest known eukaryotes, at approximate to 1-mu m diameter, are ostreococcus tauri and related species of marine phytoplankton. The genome of Ostreococcus lucimarinus has been completed and compared with that of O. tauri. This comparison reveals surprising differences across orthologous chromosomes in the two species from highly syntenic chromosomes in most cases to chromosomes with almost no similarity. Species divergence in these phytoplankton is occurring through multiple mechanisms acting differently on different chromosomes and likely including acquisition of new genes through horizontal gene transfer. We speculate that this latter process may be involved in altering the cell-surface characteristics of each species. In addition, the genome of O. lucimarinus provides insights into the unique metal metabolism of these organisms, which are predicted to have a large number of selenocysteine-containing proteins. Selenoenzymes are more catalytically active than similar enzymes lacking selenium, and thus the cell may require less of that protein. As reported here, selenoenzymes, novel fusion proteins, and loss of some major protein families including ones associated with chromatin are likely important adaptations for achieving a small cell size.},
  author       = {Palenik, Brian and Grimwood, Jane and Aerts, Andrea and Rouzé, Pierre and Salamov, Asaf and Putnam, Nicholas and Dupont, Chris and Jorgensen, Richard and Derelle, Evelyne and Rombauts, Stephane and Zhou, Kemin and Otillar, Robert and Merchant, Sabeeha S and Podell, Sheila and Gaasterland, Terry and Napoli, Carolyn and Gendler, Karla and Manuell, Andrea and Tai, Vera and Vallon, Olivier and Piganeau, Gwenael and Jancek, Séverine and Heijde, Marc and Jabbari, Kamel and Bowler, Chris and Lohr, Martin and Robbens, Steven and Werner, Gregory and Dubchak, Inna and Pazour, Gregory J and Ren, Qinghu and Paulsen, Ian and Delwiche, Chuck and Schmutz, Jeremy and Rokhsar, Daniel and Van de Peer, Yves and Moreau, Hervé and Grigoriev, Igor V},
  issn         = {0027-8424},
  journal      = {PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA},
  keywords     = {SYSTEM,EVOLUTION,TOOL,DNA,SELENOCYSTEINE,MARINE,CHLAMYDOMONAS-REINHARDTII,selenium,MOLECULAR-MECHANISMS,DIVERSITY,green algae,picoeukaryote,genome evolution,CYTOCHROME-C BIOGENESIS,synteny},
  language     = {eng},
  number       = {18},
  pages        = {7705--7710},
  title        = {The tiny eukaryote Ostreococcus provides genomic insights into the paradox of plankton speciation},
  url          = {http://dx.doi.org/10.1073/pnas.0611046104},
  volume       = {104},
  year         = {2007},
}

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