Crossref journal-article
Proceedings of the National Academy of Sciences
Proceedings of the National Academy of Sciences (341)
Abstract

Prochlorococcus marinus , the dominant photosynthetic organism in the ocean, is found in two main ecological forms: high-light-adapted genotypes in the upper part of the water column and low-light-adapted genotypes at the bottom of the illuminated layer. P. marinus SS120, the complete genome sequence reported here, is an extremely low-light-adapted form. The genome of P. marinus SS120 is composed of a single circular chromosome of 1,751,080 bp with an average G+C content of 36.4%. It contains 1,884 predicted protein-coding genes with an average size of 825 bp, a single rRNA operon, and 40 tRNA genes. Together with the 1.66-Mbp genome of P. marinus MED4, the genome of P. marinus SS120 is one of the two smallest genomes of a photosynthetic organism known to date. It lacks many genes that are involved in photosynthesis, DNA repair, solute uptake, intermediary metabolism, motility, phototaxis, and other functions that are conserved among other cyanobacteria. Systems of signal transduction and environmental stress response show a particularly drastic reduction in the number of components, even taking into account the small size of the SS120 genome. In contrast, housekeeping genes, which encode enzymes of amino acid, nucleotide, cofactor, and cell wall biosynthesis, are all present. Because of its remarkable compactness, the genome of P. marinus SS120 might approximate the minimal gene complement of a photosynthetic organism.

Bibliography

Dufresne, A., Salanoubat, M., Partensky, F., Artiguenave, F., Axmann, I. M., Barbe, V., Duprat, S., Galperin, M. Y., Koonin, E. V., Le Gall, F., Makarova, K. S., Ostrowski, M., Oztas, S., Robert, C., Rogozin, I. B., Scanlan, D. J., de Marsac, N. T., Weissenbach, J., Wincker, P., … Hess, W. R. (2003). Genome sequence of the cyanobacterium Prochlorococcus marinus SS120, a nearly minimal oxyphototrophic genome. Proceedings of the National Academy of Sciences, 100(17), 10020–10025.

Authors 21
  1. Alexis Dufresne (first)
  2. Marcel Salanoubat (additional)
  3. Frédéric Partensky (additional)
  4. François Artiguenave (additional)
  5. Ilka M. Axmann (additional)
  6. Valérie Barbe (additional)
  7. Simone Duprat (additional)
  8. Michael Y. Galperin (additional)
  9. Eugene V. Koonin (additional)
  10. Florence Le Gall (additional)
  11. Kira S. Makarova (additional)
  12. Martin Ostrowski (additional)
  13. Sophie Oztas (additional)
  14. Catherine Robert (additional)
  15. Igor B. Rogozin (additional)
  16. David J. Scanlan (additional)
  17. Nicole Tandeau de Marsac (additional)
  18. Jean Weissenbach (additional)
  19. Patrick Wincker (additional)
  20. Yuri I. Wolf (additional)
  21. Wolfgang R. Hess (additional)
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Dates
Type When
Created 22 years ago (Aug. 19, 2003, 12:56 p.m.)
Deposited 3 years, 4 months ago (April 13, 2022, 3:58 a.m.)
Indexed 23 hours, 47 minutes ago (Aug. 26, 2025, 3:16 a.m.)
Issued 22 years ago (Aug. 13, 2003)
Published 22 years ago (Aug. 13, 2003)
Published Online 22 years ago (Aug. 13, 2003)
Published Print 22 years ago (Aug. 19, 2003)
Funders 0

None

@article{Dufresne_2003, title={Genome sequence of the cyanobacterium Prochlorococcus marinus SS120, a nearly minimal oxyphototrophic genome}, volume={100}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.1733211100}, DOI={10.1073/pnas.1733211100}, number={17}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Dufresne, Alexis and Salanoubat, Marcel and Partensky, Frédéric and Artiguenave, François and Axmann, Ilka M. and Barbe, Valérie and Duprat, Simone and Galperin, Michael Y. and Koonin, Eugene V. and Le Gall, Florence and Makarova, Kira S. and Ostrowski, Martin and Oztas, Sophie and Robert, Catherine and Rogozin, Igor B. and Scanlan, David J. and de Marsac, Nicole Tandeau and Weissenbach, Jean and Wincker, Patrick and Wolf, Yuri I. and Hess, Wolfgang R.}, year={2003}, month=aug, pages={10020–10025} }