Query: NC_013501:176073 Rhodothermus marinus DSM 4252, complete genome Lineage: Rhodothermus marinus; Rhodothermus; Rhodothermaceae; Bacteroidetes Order II; Bacteroidetes; Bacteria General Information: Isolation: Submarine alkaline hot spring at Reykjanes; Country: Iceland; Temp: Thermophile; Temp: 65C; Habitat: Hot spring, Marine. This organism is a thermophilic bacterium which can grow at temperatures of up to 77 degrees C and at salt concentrations of over 6% NaCl. It has been isolated from shallow water geothermal habitats in Iceland, Portugal and Italy.
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General Information: Thermomicrobium roseum DSM 5159 was isolated from Yellowstone National Park, USA. Obligate thermophile with unusual cell wall structure. Thermomicrobium roseum is a red-pigmented, rod-shaped, Gram-negative extreme thermophile that possesses both an atypical cell wall composition and an unusual cell membrane that is composed entirely of long-chain 1,2-diols. Analyses of environmental sequences from hot spring environments show that T.roseum displays a low quantity but ubiquitous presence in top layers of microbial mats. Few standard housekeeping genes are found on the megaplasmid, however, it does encode a complete system for chemotaxis including both chemosensory components and an entire flagellar apparatus. T. roseum oxidizes CO aerobically, making it the first thermophile known to do so. In addition, is is propose that glycosylation of its carotenoids plays a crucial role in the adaptation of the cell membrane to this bacterium's thermophilic lifestyle. Because T. roseum is a deep-branching member of this phylum, eventhough this species is not photosynthetic, analysis of the genome provides some insight into the origins of photosynthesis in the Chloroflexi.