Caldicellulosiruptor bescii
species of bacterium
Caldicellulosiruptor bescii is a species of thermophilic, anaerobic cellulolytic bacteria. It was isolated from a geothermally heated freshwater pool in the Valley of Geysers on the Kamchatka Peninsula in Russia in 1990. The species was originally named Anaerocellum thermophilum, but reclassified in 2010, based on genomic data.
Biofuel production
Caldicellulosiruptor bescii is commonly used to generate microbiofuel. Although growth at temperatures up to 85 degrees Celsius have been noted, the optimum growth temperature is 75 degrees Celsius. C. bescii was originally grouped in the Anaerocellum thermophilum because of growth physiology, cell wall type and morphology. 16S rRNA sequencing later showed distinguishable differences that are responsible for placement in the Caldicellulosiruptor clade. C. besci is a Gram-positive, rod-shaped bacterium notable for its ability use a variety of polymeric carbohydrates and di- and monosaccharides to produce H2, acetate, lactate, and trace amounts of ethanol.
Caldicellulosiruptor bescii has been selected for study by Oak Ridge National Laboratory and the University of Georgia's Department of Genetics for its ability to degrade cellulose. Through plasmid recombination the region for the gene encoding production of lactate dehydrogenase has been deleted causing the microbe to produce elevated levels of acetate and H2.
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Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated Oct 20, 2025. The linked authority identifier is Q5019084. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1990 and 2010.
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This entry incorporates text from “Caldicellulosiruptor bescii” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.