Extremophiles

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Extremophiles are organisms that thrive in (and may require) extreme environments. Most known extremophiles are microbes. Those that thrive in very hot environments are called thermophiles or hyperthermophiles, while those that thrive in very salty environments are called halophiles. Extremophiles can be contrasted with organisms that live in less extreme environments. Such organisms may be called mesophiles (living at moderate temperatures) or neutrophiles (living at neutral pH).

Proteins of thermophiles and halophiles tend to be more stable, easier to manage in the laboratory, and easier to crystallize than proteins from mesophiles. Consequently, extremophile proteins have been very useful in crystallography and structural genomics, yielding many new structures[1][2]. For example, the Nobel Prize-winning structures of the ribosome were determined using proteins from the thermophile Thermus thermophilus and the halophile Thermus thermophilus (see 2009 at Nobel Prizes for 3D Molecular Structure#Twenty-First_Century).

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External Resources

References

  1. ↑ Jenney FE Jr, Adams MW. The impact of extremophiles on structural genomics (and vice versa). Extremophiles. 2008 Jan;12(1):39-50. Epub 2007 Jun 13. PMID:17563834 doi:10.1007/s00792-007-0087-9
  2. ↑ Cava F, Hidalgo A, Berenguer J. Thermus thermophilus as biological model. Extremophiles. 2009 Mar;13(2):213-31. Epub 2009 Jan 21. PMID:19156357 doi:10.1007/s00792-009-0226-6

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Wayne Decatur, Eric Martz

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