Chlorobium ferrooxidans: Difference between revisions
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==Genome Structure== | ==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? | Describe the size and content of the genome. How many chromosomes? Circular or linear? Other interesting features? What is known about its sequence? | ||
The Chlorobium-like partner in the coculture KoFox is genetically related to "Chlorobium", "Prosthecochloris", and "Pelodictyon", however no relationship was found to any strain for which rRNA sequence data currently are available. Overall 16S rRNA sequence similarity values of 91.4 - 96.7% indicate that the strain represents a separate line of descent within a Chlorobium/Pelodictyon/Prosthechloris cluster (see figure 2). According to the NCBI Genome project website (ref), Chlorobium ferrooxidans genome is 2.53896 Mbp in length, contains 2158 proteins and 47 RNAs. | |||
==Cell Structure, Metabolism and Life Cycle== | ==Cell Structure, Metabolism and Life Cycle== | ||
Revision as of 19:06, 26 February 2010
Classification
Domain: Bacteria
Phylum: Chlorobi
Class: Chlorobia
Order: Chlorobiales
Family: Chlorobiaceae
Genus: Chlorobium
Species: ferrooxidans
NCBI link to find]
Species
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NCBI: Taxonomy |
Chlorobium ferrooxidans
Description and Significance
This green phototrophic bacterium is short, rod-shaped, approximately 0.5x1.0-1.5 μm in size, with rounded ends. The organism is nonmotile, gram negative, and nonsporeforming. Chlorobium ferrooxidans is strictly anaerobic. Originally isolated from shallow freshwater ditches, this bacterium has only been isolated as a coculture with a strain identified as a member of the ε-subclass of the proteobacteria closely related to "Geospirillum arsenophilum". When grown in coculture, "Chlorobium ferrooxidans" oxidizes ferrous iron to ferric iron with stoichiometric formation of cell mass from carbon dioxide. This bacterium is important due to the fact that it is a novel green phototroph, related to other species of Chlorobium yet unique in regards to the oxidation of ferrous iron to ferric iron. This process by bacteria is a relatively novel phenomenon that has only been observed with phototrophic purple sulfur or non-sulfur bacteria (Wkddel et al., 1993; Ehrenreich and Widdel, 1994; Heising and Scchink, 1998). This observation in green phototrophic bacteria may indicate phototrophic ferrous iron oxidation was a widespread metabolic capacity in an early phase of evolution (Heising et al. 1999).
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? The Chlorobium-like partner in the coculture KoFox is genetically related to "Chlorobium", "Prosthecochloris", and "Pelodictyon", however no relationship was found to any strain for which rRNA sequence data currently are available. Overall 16S rRNA sequence similarity values of 91.4 - 96.7% indicate that the strain represents a separate line of descent within a Chlorobium/Pelodictyon/Prosthechloris cluster (see figure 2). According to the NCBI Genome project website (ref), Chlorobium ferrooxidans genome is 2.53896 Mbp in length, contains 2158 proteins and 47 RNAs.
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
Author
Page authored by _____, student of Prof. Jay Lennon at Michigan State University.
