You are not currently logged in.

Access JSTOR through your library or other institution:


Log in through your institution.

Journal Article

A Small Microbial Genome: The End of a Long Symbiotic Relationship?

Vicente Pérez-Brocal, Rosario Gil, Silvia Ramos, Araceli Lamelas, Marina Postigo, José Manuel Michelena, Francisco J. Silva, Andrés Moya and Amparo Latorre
New Series, Vol. 314, No. 5797 (Oct. 13, 2006), pp. 312-313
Stable URL:
Page Count: 2
Were these topics helpful?
See somethings inaccurate? Let us know!

Select the topics that are inaccurate.

  • More info
  • Add to My Lists
  • Cite this Item
Preview not available
Preview not available


Intracellular bacteria are characterized by genome reduction. The 422,434--base pair genome of Buchnera aphidicola BCc, primary endosymbiont of the aphid Cinara cedri, is ∼200 kilobases smaller than the previously sequenced B. aphidicola genomes. B. aphidicola BCc has lost most metabolic functions, including the ability to synthesize the essential amino acid tryptophan and riboflavin. In addition, most retained genes are evolving rapidly. Possibly, B. aphidicola BCc is losing its symbiotic capacity and is being complemented (and might be replaced) by the highly abundant coexisting secondary symbiont.

Page Thumbnails

  • Thumbnail: Page 
  • Thumbnail: Page