Geoglobus ahangari

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Domain Archaea; Phylum Euryarchaeota; Class Archaeoglobi; Order Archaeoglobales; Family Archaeoglobaceae [Others may be used. Use NCBI link to find]


NCBI: Taxonomy

Geoglobus ahangari

Description and Significance

Describe the appearance, habitat, etc. of the organism, and why you think it is important.

G. ahangari is an anaerobic, coccoid-shaped member of Archaea. It is a hyperthermophile that can grow both autotrophically or heterotrophically depending on the available electron sources. G. ahangari is biologically and ecologically significant because it was the first anaerobe isolated that had the ability to use long-chain fatty acids as a source of energy. It was also the first archaeon found to have the ability to generate energy from the coupling of hydrogen gas to the reduction of iron.

Genome Structure

Describe the size and content of the genome. How many chromosomes? Circular or linear? Other interesting features? What is known about its sequence?

Cell Structure, Metabolism and Life Cycle

Interesting features of cell structure; how it gains energy; what important molecules it produces.

Ecology and Pathogenesis

Habitat; symbiosis; biogeochemical significance; contributions to environment.
If relevant, how does this organism cause disease? Human, animal, plant hosts? Virulence factors, as well as patient symptoms.


[Sample reference] Takai, K., Sugai, A., Itoh, T., and Horikoshi, K. "Palaeococcus ferrophilus gen. nov., sp. nov., a barophilic, hyperthermophilic archaeon from a deep-sea hydrothermal vent chimney". International Journal of Systematic and Evolutionary Microbiology. 2000. Volume 50. p. 489-500.

[ K. Kashefi, J. M. Tor, D. E. Holmes, C. V. Gaw Van Praagh, A. L. Reysenbach, and D. R. Lovley Geoglobus ahangari gen. nov., sp. nov., a novel hyperthermophilic archaeon capable of oxidizing organic acids and growing autotrophically on hydrogen with Fe(III) serving as the sole electron acceptor Int J Syst Evol Microbiol, May 2002; 52: 719 - 728.]


Page authored by _____, student of Prof. Jay Lennon at Michigan State University.

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