Query: NC_006138:1921424 Desulfotalea psychrophila LSv54, complete genome
Lineage: Desulfotalea psychrophila; Desulfotalea; Desulfobulbaceae; Desulfobacterales; Proteobacteria; Bacteria
General Information: This organism was isolated from marine sediments off of the coast of Svalbard, and can grow at temperatures as low as -1.7 degrees C. Sulfate-reducing bacterium. This organism grows on more complex organic compounds such as acetate, propionate, butyrate, lactate as well as by using simpler compounds such as hydrogen. This organism is an important part of global biogeochemical cycling of carbon and other nutrients.
Subject: NC_011959:972798 Thermomicrobium roseum DSM 5159, complete genome
Lineage: Thermomicrobium roseum; Thermomicrobium; Thermomicrobiaceae; Thermomicrobiales; Chloroflexi; Bacteria
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.