Classification
Domain: Bacteria
Phylum: Chloroflexi
Class: Chloroflexi
Order: Chloroflexales
Family: Chloroflexaceae
Species
Roseiflexus castenholzii
Description and Significance
Roseiflexus castenholzii is gram negative and is classified as a green, nonsulfur bacteria. Colonies that were found were red to reddish brown in color. Roseiflexus castenholzii is an unbranched multicellular filamentous organism that does not have a defined length but the diameter is .8 to 1.0 micrometers. R. castenholzii show signs of gliding motility. An unusual aspect of this organism is that it lacks chlorosomes, which can usually be found in related species, and intracytoplasmic membranes.
Roseiflexus castenholzii is thermophilic and found on microbial mats in hot springs, and was originally found in the Nakabusa hot springs in Japan. Ideal conditions to live at are a water temperature ranging from 45 to 55 degrees Celsius and a pH from 7 to 9. The organism can function under aerobic and anaerobic conditions.
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
Collins, A. M. "Light-harvesting and the primary photochemistry of Roseiflexus castenholzii". Ann Arbor: ProQuest, 2010.
Hanada, S., Takaichi, S., Matsuura, K., and Nakamura, K. "Roseiflexus castenholzii gen. nov., sp. nov., a thermophilic, filamentous, photosynthetic bacterium that lacks chlorosomes". International Journal of Systematic and Evolutionary Microbiology. 2002. Volume 52. p. 187-193.
Van der Meer, M. T., Klatt, C. G., Wood, J., Bryant, D. A., Bateson, M. M., Lammerts, L., Schouten, S., Damste, J. S., Madigan, M. T., and Ward, D. M. "Cultivation and genomic, nutritional, and lipid biomarker characterization of Roseiflexus strains closely related to predominant in situ populations inhabity Yellowstone hot spring microbial mats". Journal of Bacteriology. 2010. Volume 192. Issue 12. p. 3033-3042.
Van der Meer, M. T., Schouten, S., Bateson, M. M., Nubel, U., Wieland, A., Kuhl, M., de Leeuw, J. W., Sinninghe Damste, J. S., and Ward, D. M. "Diel variations in carbon metabolism by green nonsulfur-like bacteria in alkaline siliceous hot spring microbial mats from Yellowstone National Park". Applied and Environmental Microbiology. 2005. Volume 71. Issue 7. p. 3978-3986.
Yamada, M., Zhang, H., Hanada, S., Nagashima, K. V., Shimada, K., and Matsuura, K. "Structural and spectroscopic properties of a reaction center complex from the chlorosome-lacking filamentous anoxygenic phototrophic bacterium Roseiflexus castenholzii". Journal of Bacteriology. 2005. Volume 187. Issue 5. p. 1702-1709.
[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.
Author
Page authored by Jessica Lefere and Bernice Li, students of Prof. Jay Lennon at Michigan State University.
<-- Do not remove this line-->
