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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Novel nitrogen-fixing Acetobacter nitrogenifigens sp. nov., isolated from Kombucha tea.

The four nitrogen-fixing bacteria so far described in the family Acetobacteraceae belong to the genera Gluconacetobacter and Acetobacter. Nitrogen-fixing bacterial strain RG1(T) was isolated from Kombucha tea and, based on the phylogenetic analysis of 16S rRNA gene sequence which is supported by a high bootstrap value, was found to belong to the genus Acetobacter. Strain RG1(T) differed from Acetobacter aceti, the nearest member with a 16S rRNA gene sequence similarity of 98.2 %, and type strains of other Acetobacter species with regard to several characteristics of growth features in culture media, growth in nitrogen-free medium, production of gamma-pyrone from glucose and dihydroxyacetone from glycerol. Strain RG1(T) utilized maltose, glycerol, sorbitol, fructose, galactose, arabinose and ethanol, but not methanol as a carbon source. These results, along with electrophoretic mobility patterns of nine metabolic enzymes, suggest that strain RG1(T) represents a novel nitrogen-fixing species. The ubiquinone present was Q-9 and DNA G+C content was 64.1 mol%. Strain RG1(T) exhibited a low value of 2-24 % DNA-DNA relatedness to the type strains of related acetobacters, which placed it as a separate taxon. On the basis of this data, the name Acetobacter nitrogenifigens sp. nov. is proposed, with the type strain RG1(T) (=MTCC 6912(T)=LMG 23498(T)).[1]


  1. Novel nitrogen-fixing Acetobacter nitrogenifigens sp. nov., isolated from Kombucha tea. Dutta, D., Gachhui, R. Int. J. Syst. Evol. Microbiol. (2006) [Pubmed]
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