Genomic Insights into Cold Adaptation of Permafrost Bacteria

  • Corien BakermansEmail author
  • Peter W. Bergholz
  • Hector Ayala-del-Río
  • James Tiedje
Part of the Soil Biology book series (SOILBIOL, volume 16)

Genomic analysis of the permafrost isolate Psychrobacter arcticus 273-4 has revealed that a variety of adaptations are employed to enable active growth at subzero temperatures. Many of these low-temperature adaptations are largely similar to adaptations found in other psychrophilic microorganisms isolated from other low-temperature environments and include: changes in amino acid abundance that favor protein mobility; RNA and protein chaperones; and desaturation of membrane lipids. Unlike other psychrophiles, P. arcticus 273-4 constitutively expressed the major cold shock protein (cspA, an RNA chaperone); employed several pairs of isozymes (homologous enzymes with different temperature optima); regulated cell wall elasticity as temperatures decreased; and utilized resources efficiently. These unique low-temperature adaptations may be advantageous in permafrost, where subzero temperatures reign.


Cold Adaptation Subzero Temperature Psychrophilic Bacterium Siberian Permafrost Genomic Insight 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Corien Bakermans
    • 1
    Email author
  • Peter W. Bergholz
    • 2
  • Hector Ayala-del-Río
    • 3
  • James Tiedje
    • 4
  1. 1.Department of Earth SciencesMontana State UniversityBozemanUSA
  2. 2.Department of Crop and Soil SciencesCornell UniversityIthacaUSA
  3. 3.Department of BiologyUniversity of Puerto Rico at HumacaoHumacaoUSA
  4. 4.Center for Microbial EcologyMichigan State UniversityEast LansingUSA

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