Query: NC_014624:2668157 Eubacterium limosum KIST612 chromosome, complete genome
Lineage: Eubacterium limosum; Eubacterium; Eubacteriaceae; Clostridiales; Firmicutes; Bacteria
General Information: Eubacterium limosum KIST612 is an acetogenic bacterium isolated from an anaerobic digester and has a high growth rate on synthesis gas (CO; carbon monoxide) using it as a sole energy source. This organism produces acetate as well as butyrate and ethanol as fermentation products from syngas. Therefore, E. limosum KIST612 has been considered for a model strain for bioenergy production from syngas (obtained from biomass).
Subject: NC_015709:1769806 Zymomonas mobilis subsp. pomaceae ATCC 29192 chromosome, complete
Lineage: Zymomonas mobilis; Zymomonas; Sphingomonadaceae; Sphingomonadales; Proteobacteria; Bacteria
General Information: Country: United Kingdom; Isolation: Sick cider; Temp: Mesophile. The natural habitat of this organism includes sugar-rich plant saps where the bacterium ferments sugar to ethanol. The high conversion of sugars to ethanol makes this organism useful in industrial production systems, particularly in production of bioethanol for fuel. A recombinant strain of this bacterium is utilized for the conversion of sugars, particularly xylose, which is not utilized by another common sugar-fermenting organism such as yeast, to ethanol. Since xylose is a common breakdown product of cellulose or a waste component of the agricultural industry, it is an attractive source for ethanol production. Zymomonas mobilis was chosen for this process as it is ethanol-tolerant (up to 120 grams of ethanol per litre) and productive (5-10% more ethanol than Saccharomyces). This bacterium ferments using the Enter-Doudoroff pathway, with the result that less carbon is used in cellular biomass production and more ends up as ethanol, another factor that favors this organism for ethanol production.