The chimeric nature of the genomes of marine magnetotactic coccoid-ovoid bacteria defines a novel group of Proteobacteria. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Environmental Microbiology Année : 2016

The chimeric nature of the genomes of marine magnetotactic coccoid-ovoid bacteria defines a novel group of Proteobacteria.

Boyang Ji
Sheng-Da Zhang
  • Fonction : Auteur
Wei-Jia Zhang
Zoe Rouy
  • Fonction : Auteur
  • PersonId : 914001
  • IdHAL : zoe-rouy
François Alberto
Claire-Lise Santini
  • Fonction : Auteur
Sophie Mangenot
  • Fonction : Auteur
Séverine Gagnot
  • Fonction : Auteur
Nadège Philippe
  • Fonction : Auteur
Nathalie Pradel
Lichen Zhang
Sébastien Tempel
  • Fonction : Auteur
Ying Li
Claudine Médigue
Bernard Henrissat
  • Fonction : Auteur
  • PersonId : 833340
Pedro M Coutinho
  • Fonction : Auteur
Valérie Barbe
Emmanuel Talla
  • Fonction : Auteur
Long-Fei Wu

Résumé

Magnetotactic bacteria (MTB) are a group of phylogenetically and physiologically diverse Gram-negative bacteria that synthesize intracellular magnetic crystals named magnetosomes. MTB are affiliated with three classes of Proteobacteria phylum, Nitrospirae phylum, Omnitrophica phylum and probably with the candidate phylum Latescibacteria. The evolutionary origin and physiological diversity of MTB compared to other bacterial taxonomic groups remain to be illustrated. Here, we analyzed the genome of the marine magneto-ovoid strain MO-1 and found that it is closely related to Magnetococcus marinus MC-1. Detailed analyses of the ribosomal proteins and whole proteomes of 390 genomes reveal that, among the Proteobacteria analyzed, only MO-1 and MC-1 have coding sequences (CDSs) with a similarly high proportion of origins to Alphaproteobacteria, Betaproteobacteria, Deltaproteobacteria and Gammaproteobacteria. Interestingly, a comparative metabolic network analysis with anoxic network enzymes from sequenced MTB and non-MTB successfully allows the eventual prediction of an organism with a metabolic profile compatible for magnetosome production. Altogether, our genomic analysis reveals multiple origins of MO-1 and M. marinus MC-1 genomes and suggests a metabolism-restriction model for explaining whether a bacterium could become an MTB upon acquisition of magnetosome encoding genes. This article is protected by copyright. All rights reserved.
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Dates et versions

hal-01410134 , version 1 (06-12-2016)

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Citer

Boyang Ji, Sheng-Da Zhang, Wei-Jia Zhang, Zoe Rouy, François Alberto, et al.. The chimeric nature of the genomes of marine magnetotactic coccoid-ovoid bacteria defines a novel group of Proteobacteria.. Environmental Microbiology, 2016, pp.doi: 10.1111/1462-2920.13637. ⟨10.1111/1462-2920.13637⟩. ⟨hal-01410134⟩
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