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    Small genome of Candidatus Blochmannia, the bacterial endosymbiont of Camponotus, implies irreversible specialization to an intracellular lifestyle

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    Wernegreen Lazarus and Degnan.pdf (261.2Kb)
    Date
    2002
    Author
    Wernegreen, Jennifer J.  Concept link
    Lazarus, Adam B.  Concept link
    Degnan, Patrick H.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/109
    As published
    https://doi.org/10.1099/00221287-148-8-2551
    DOI
    10.1099/00221287-148-8-2551
    Keyword
     Genome reduction; Symbiosis; Bacteriocytes; Asexuality; Genetic drift 
    Abstract
    Blochmannia (Candidatus Blochmannia gen. nov.) is the primary bacterial endosymbiont of the ant genus Camponotus. Like other obligate endosymbionts of insects, Blochmannia occurs exclusively within eukaryotic cells and has experienced long-term vertical transmission through host lineages. In this study, PFGE was used to estimate the genome size of Blochmannia as approximately 800 kb, which is significantly smaller than its free-living relatives in the enterobacteria. This small genome implies that Blochmannia has deleted most of the genetic machinery of related free-living bacteria. Due to restricted gene exchange in obligate endosymbionts, the substantial gene loss in Blochmannia and other insect mutualists may reflect irreversible specialization to a host cellular environment.
    Description
    Author Posting. © Society for General Mircobiology, 2002. This article is posted here by permission of Society for General Mircobiology for personal use, not for redistribution. The definitive version was published in Microbiology 148 (2002): 2551-2556.
    Collections
    • Josephine Bay Paul Center in Comparative Molecular Biology and Evolution
    Suggested Citation
    Microbiology 148 (2002): 2551-2556
     

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