A small microbial genome:: The end of a long symbiotic relationship?

被引：255

作者：

Perez-Brocal, Vicente

Gil, Rosario

Ramos, Silvia

Lamelas, Araceli

Postigo, Marina

Manuel Michelena, Jose

Silva, Francisco J.

Moya, Andres

Latorre, Amparo

机构：

[1] Univ Valencia, Inst Cavanilles Biodiversitat & Biol Evolut, Valencia 46071, Spain

[2] Univ Valencia, Dept Genet, E-46100 Valencia, Spain

[3] CSIC, INTA, Ctr Astrobiol, Madrid 28850, Spain

[4] Univ Valencia, Dept Zool, E-46100 Valencia, Spain

来源：

SCIENCE | 2006年 / 314卷 / 5797期

关键词：

D O I：

10.1126/science.1130441

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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 similar to 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.

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页码：312 / 313

页数：2

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