Deinococcus geothermalis

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Deinococcus geothermalis
Scientific classification
Kingdom: Bacteria
Phylum: Deinococcus-Thermus
Class: Deinococci
Order: Deinococcales
Family: Deinococcaceae
Genus: Deinococcus
Species: D. geothermalis
Binomial name
Deinococcus geothermalis
Ferreira et al. 1997

Deinococcus geothermalis is a bacterium. It produces orange-pigmented colonies and has an optimum growth temperature of about 45 °C (113 °F) to 50 °C (122 °F). It is extremely gamma radiation-resistant. Its type strain is AG-3a (= DSM 11300).[1]

A space mission called EXPOSE-R2 was launched on 24 July 2014 aboard the Russian Progress M-23M,[2] and was attached on 18 August 2014 outside the ISS on the Russian module Zvezda.[3] The two main experiments will test the resistance of a variety of extremophile microorganisms, including Deinococcus geothermalis to long-term exposure to outer space and to a Mars simulated environment.[4]


  1. ^ Ferreira, A. C.; Nobre, M. F.; Rainey, F. A.; Silva, M. T.; Wait, R.; Burghardt, J.; Chung, A. P.; Da Costa, M. S. (1997). "Deinococcus geothermalis sp. nov. and Deinococcus murrayi sp. nov., Two Extremely Radiation-Resistant and Slightly Thermophilic Species from Hot Springs". International Journal of Systematic Bacteriology 47 (4): 939–947. doi:10.1099/00207713-47-4-939. ISSN 0020-7713. 
  2. ^ Gronstal, Aaron L. (31 July 2014). "Exploring Mars in low Earth orbit". NASA's Astrobiology Magazine. Retrieved 2014-08-02. 
  3. ^ Kramer, Miriam (18 August 2014). "Russian Cosmonaut Tosses Satellite for Peru During Spacewalk". Retrieved 2014-08-19. 
  4. ^ [ BOSS on EXPOSE R2 Comparative Investigations on Biofilm and Planktonic cells of Deinococcus geothermalis as Mission Preparation Tests]. EPSC Abstracts. Vol. 8, EPSC2013-930, 2013. European Planetary Science Congress 2013.

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