The genome sequence of Blochmannia floridanus: Comparative analysis of reduced genomes

R. Gil, F.J. Silva, E. Zientz, F. Delmotte, F. Gonzalez-Candelas, A. Latorre, C. Rausell, J. Kamerbeek, J. Gadau, B. Hölldobler, R.C.H.J. van Ham, R. Gross, A. Moya

    Research output: Contribution to journalArticleAcademicpeer-review

    269 Citations (Scopus)


    Bacterial symbioses are widespread among insects, probably being one of the key factors of their evolutionary success. We present the complete genome sequence of Blochmannia floridanus, the primary endosymbiont of carpenter ants. Although these ants feed on a complex diet, this symbiosis very likely has a nutritional basis: Blochmannia is able to supply nitrogen and sulfur compounds to the host while it takes advantage of the host metabolic machinery. Remarkably, these bacteria lack all known genes involved in replication initiation (dnaA, priA, and recA). The phylogenetic analysis of a set of conserved protein-coding genes shows that Bl. floridanus is phylogenetically related to Buchnera aphidicola and Wigglesworthia glossinidia, the other endosymbiotic bacteria whose complete genomes have been sequenced so far. Comparative analysis of the five known genomes from insect endosymbiotic bacteria reveals they share only 313 genes, a number that may be close to the minimum gene set necessary to sustain endosymbiotic life
    Original languageEnglish
    Pages (from-to)9388-9393
    JournalProceedings of the National Academy of Sciences of the United States of America
    Issue number16
    Publication statusPublished - 2003


    • escherichia-coli k-12
    • endosymbiotic bacteria
    • phylogenetic analysis
    • gene-cluster
    • evolution
    • proteins
    • buchnera
    • replication
    • selection
    • aphids

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