Halorhabdus utahensis: Difference between revisions
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==Description and Significance== | ==Description and Significance== | ||
Halorhabdus (salt-loving rod) utahensis (pertaining to the state of Utah) was isolated from a sediment sample that was collected in the southern arm of the hypersaline Great Salt Lake, Utah, USA. It is a motile, gram-negative, extreamly halophilic archaeon that forms red, circular colonies. It grows in temperatures between 17 and 55°C, with optimal growth occurring at 50°C. It can also grow over a pH range of 5.5-8.5 with the optimal pH value between 6..7 and 7.1. Halorhabdus utahensis has a high salinity optimum of 27% NaCl, which makes it one of the highest reported salinity optimum of any living organism | |||
The cells of Halorhabdus utahensis are extremely pleomorphic, exhibiting anything from irregular coccoid or ellipsoid to triangular, club-shaped or rod-shaped forms. The rod-shaped and ellipsoid cells are 2-10 * 0.5-1 µm and 1-2 * 1 µm in size, respectively, and the spherical cells have a diameter of approximately 1 µm. The archaeon utilizes only a limited range of substrates, such as glucose, xylose, and fructose, for growth, and is unique in its inability to utilize yeast extract or peptone. Other substances that do not stimulate the organism's growth include organic acids, amino acids, alcohols, glycogen, and starch. | |||
==Genome Structure== | ==Genome Structure== | ||
Revision as of 23:23, 13 April 2012
Classification
Archaea; Euryarchaeota; Halobacteria; Halobacteriales; Halobacteriaceae; Halorhabdus
Species
Halorhabdus utahensis
Description and Significance
Halorhabdus (salt-loving rod) utahensis (pertaining to the state of Utah) was isolated from a sediment sample that was collected in the southern arm of the hypersaline Great Salt Lake, Utah, USA. It is a motile, gram-negative, extreamly halophilic archaeon that forms red, circular colonies. It grows in temperatures between 17 and 55°C, with optimal growth occurring at 50°C. It can also grow over a pH range of 5.5-8.5 with the optimal pH value between 6..7 and 7.1. Halorhabdus utahensis has a high salinity optimum of 27% NaCl, which makes it one of the highest reported salinity optimum of any living organism
The cells of Halorhabdus utahensis are extremely pleomorphic, exhibiting anything from irregular coccoid or ellipsoid to triangular, club-shaped or rod-shaped forms. The rod-shaped and ellipsoid cells are 2-10 * 0.5-1 µm and 1-2 * 1 µm in size, respectively, and the spherical cells have a diameter of approximately 1 µm. The archaeon utilizes only a limited range of substrates, such as glucose, xylose, and fructose, for growth, and is unique in its inability to utilize yeast extract or peptone. Other substances that do not stimulate the organism's growth include organic acids, amino acids, alcohols, glycogen, and starch.
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.
References
1. Anderson, I., Tindall, B., Pomrenke, H., & Goker, M. (2009). Complete genome sequence of Halorhabdus utahensis type strain (AX-2T). Standards in Genomic Sciences, (1), 218-225.
2. Waino, M., Tindall, B., & Ingvorsen, K. (2000). Halorhabdus utahensis gen. nov., sp. nov., an aerobic, extremely halophilic member of the archaea from Great Salt Lake, Utah. International Journal of Systematic Evolutionary Microbiology, (50), 183-190.
3. Zhang, Tao, Supratim Datta, Jerry Eichler, and Natalia Ivanova. “Identification of a Haloalkaliphilic and Thermostable Cellulase with Improved Ionic Liquid Tolerance.” Green Chemistry 13 (2011): 2083-2090.
Author
Page authored by Elliot Swift, Mark Sherill, Matt Stoloff, Hannah Shumway, student of Prof. Jay Lennon at Michigan State University.
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