Extremophiles

, Volume 4, Issue 6, pp 321–331

Cold stress response in Archaea

  • R. Cavicchioli
  • Torsten Thomas
  • Paul M. G. Curmi
REVIEW

DOI: 10.1007/s007920070001

Cite this article as:
Cavicchioli, R., Thomas, T. & Curmi, P. Extremophiles (2000) 4: 321. doi:10.1007/s007920070001

Abstract

We live on a cold planet where more than 80% of the biosphere is permanently below 5°C, and yet comparatively little is known about the genetics and physiology of the microorganisms inhabiting these environments. Based on molecular probe and sequencing studies, it is clear that Archaea are numerically abundant in diverse low-temperature environments throughout the globe. In addition, non-low-temperature-adapted Archaea are commonly exposed to sudden decreases in temperature, as are other microorganisms, animals, and plants. Considering their ubiquity in nature, it is perhaps surprising to find that there is such a lack of knowledge regarding low-temperature adaptation mechanisms in Archaea, particularly in comparison to what is known about archaeal thermophiles and hyperthermophiles and responses to heat shock. This review covers what is presently known about adaptation to cold shock and growth at low temperature, with a particular focus on Antarctic Archaea. The review highlights the similarities and differences that exist between Archaea and Bacteria and eukaryotes, and addresses the potentially important role that protein synthesis plays in adaptation to the cold. By reviewing the present state of the field, a number of important areas for future research are identified.

Key words Cold shockLow-temperature adaptationPsychrophileAdaptive mechanismsAntarctic ArchaeaGene expressionProtein structureReview

Copyright information

© Springer-Verlag Tokyo 2000

Authors and Affiliations

  • R. Cavicchioli
    • 1
  • Torsten Thomas
    • 1
  • Paul M. G. Curmi
    • 2
  1. 1.School of Microbiology and Immunology, The University of New South Wales, UNSW, Sydney 2052, Australia Tel. +61-29385-3516; Fax +61-29385-2742 e-mail: r.cavicchioli@unsw.edu.auAU
  2. 2.Initiative in Biomolecular Structure, School of Physics, The University of New South Wales, UNSW, Sydney, AustraliaAU