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Medigue, C., Krin, E., Pascal, G., Barbe, V., Bernsel, A., Bertin, P.N., Cheung, F., Cruveiller, S., D’Amico, S., Duilio, A., Fang, G., Feller, G., Ho, C., Mangenot, S., Marino, G., Nilson, J., Parrilli, E., Rocha, E.P.C., Rouy, Z., Sekowska, A., Tutino,. (2005). Coping with the cold: the genome of the versatile marine Antarctica bacterium Pseudoalteromonas haloplanktis TAC125. Genome Res., 15(10).
Abstract: A considerable fraction of life develops in the sea at temperatures lower than 15 degrees C. Little is known about the adaptive features selected under those conditions. We present the analysis of the genome sequence of the fast growing Antarctica bacterium Pseudoalteromonas haloplanktis TAC125. We find that it copes with the increased solubility of oxygen at low temperature by multiplying dioxygen scavenging while deleting whole pathways producing reactive oxygen species. Dioxygen-consuming lipid desaturases achieve both protection against oxygen and synthesis of lipids making the membrane fluid. A remarkable strategy for avoidance of reactive oxygen species generation is developed by P. haloplanktis, with elimination of the ubiquitous molybdopterin-dependent metabolism. The P. haloplanktis proteome reveals a concerted amino acid usage bias specific to psychrophiles, consistently appearing apt to accommodate asparagine, a residue prone to make proteins age. Adding to its originality, P. haloplanktis further differs from its marine counterparts with recruitment of a plasmid origin of replication for its second chromosome.
Programme: 193
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Julian Gutt, Philippe Koubbi, Marc Eléaume. (2007). Mega-epibenthic diversity off Terre Adélie (Antarctica) in relation to disturbance. Polar Biol., 30(10), 1323–1329.
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Spahni R., Chappellaz J., Stocker T., Loulergue L., Hausammann G., Kawamura K., Fluckiger J., Schwander J., Raynaud D., Masson-Delmotte V. & Jouzel J. (2005). Atmospheric Methane and Nitrous Oxide of the Late Pleistocene from Antarctic Ice Cores. Science, 310, 1317–1321.
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Luque S. & Guinet C. (2007). A maximum likelihood approach for identifying dive bouts improves accuracy, precision and objectivity. Behaviour, 144, 1315–1332.
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Cellule communication université Paris Diderot. (2008). Des chercheurs de l’Université en mission aux Kerguelen.
Abstract: Explication des objectifs, des moyens et des réalisations de la campagne FLATOCOA
Site web université Paris-Diderot
Programme: 1188
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Siegenthaler U., Stocker T., Monnin E., Luthi D., Schwander J., Stauffer B., Raynaud D., Barnola J.M., Fischer H., Masson-Delmotte V. & Jouzel J. (2005). Stable Carbon Cycle-Climate Relationship During the Late Pleistocene. Science, 310, 1313–1316.
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Brook E. (2005). Tiny Bubbles Tell All. Science, 310, 1285–1287.
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Luque S.P., Miller E.H., Arnould J.P.Y., Chambellant M., Guinet C. (2007). Review on the ontogeny of body size and shape of antarctic and subantarctic fur seals during lactation. Can. J. Zool., 85, 1275–1285.
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Vernin, J.; Chadid, M.; Aristidi, E.; Agabi, A.;Trinquet, H.; van der Swaelmen, M. (2009). First single star scidar measurements at Dome C, Antarctica. ASTRONOMY & ASTROPHYSICS, 500(3), 1271–1276.
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Fattori I., S. Becagli, S. Bellandi, M. Innocenti, A. Mannini, M. Severi, V. Vitale and R. Udisti. (2005). Chemical composition and physical features of summer aerosol at Terra Nova Bay and Dome C (Antarctica). Journal of environmental monitoring, 7, 1265–1274.
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