Coping with cold: the genome of the versatile marine Antarctica bacterium Pseudoalteromonas haloplanktis TAC125

A considerable fraction of life develops in the sea at temperatures lower than 15°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 tha...

Full description

Bibliographic Details
Main Authors: CLAUDINE MDIGUE, EVELYNE KRIN, GRALDINE PASCAL, VALRIE BARBE, ANDREAS BERNSE, PHILIPPE N. BERTIN, FRANKIE CHEUNG, STPHANE CRUVEILLER, SALVINO D'AMICO, GANG FANG, GEORGES FELLER, CHRISTINE HO, SOPHIE MANGENOT, JOHAN NILSSON, EDUARDO P. C. ROCHA, ZO ROUY, AGNIESZKA SEKOWSKA, DAVID VALLENET, GUNNAR VON HEIJNE, ANTOINE DANCHIN, DUILIO, ANGELA, MARINO, GENNARO, PARRILLI, ERMENEGILDA, TUTINO, MARIA LUISA
Other Authors: Claudine, Mdigue, Evelyne, Krin, Graldine, Pascal, Valrie, Barbe, Andreas, Bernse, PHILIPPE N., Bertin, Frankie, Cheung, Stphane, Cruveiller, Salvino, D'Amico, Duilio, Angela, Gang, Fang, Georges, Feller, Christine, Ho, Sophie, Mangenot, Marino, Gennaro, Johan, Nilsson, Parrilli, Ermenegilda, EDUARDO P. C., Rocha, Zo, Rouy, Agnieszka, Sekowska, Tutino, MARIA LUISA, David, Vallenet, GUNNAR VON, Heijne, Antoine, Danchin
Format: Article in Journal/Newspaper
Language:English
Published: 2005
Subjects:
Pseusoalteromonas haloplankti
Antarctic bacterium
Antarctic
Antarc*
Antarctica
Online Access:http://hdl.handle.net/11588/103176
Description
Summary:A considerable fraction of life develops in the sea at temperatures lower than 15°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.

Similar Items