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Int J Syst Evol Microbiol 58 (2008), 1238-1240; DOI  10.1099/ijs.0.64894-0
© 2008 International Union of Microbiological Societies

Asaccharobacter celatus gen. nov., sp. nov., isolated from rat caecum

Kimiko Minamida, Kyohei Ota, Megumi Nishimukai, Michiko Tanaka, Ayumi Abe, Teruo Sone, Fusao Tomita, Hiroshi Hara and Kozo Asano

Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University, Kita 9, Nishi 9, Kita-ku, Sapporo, Hokkaido 060-8589, Japan

Correspondence
Kimiko Minamida
kimiko-m{at}chem.agr.hokudai.ac.jp

An obligately anaerobic and equol-producing bacterium, designated strain do03T, was isolated from the caecal content of a rat. Cells were Gram-positive, non-spore-forming rods. The results from a phylogenetic analysis based on 16S rRNA gene sequences showed that strain do03T formed a separate line of descent in the phylogenetic cluster of the family Coriobacteriaceae. The strain was unable to metabolize glucose or other carbohydrates as sole carbon sources; growth was enhanced in the presence of arginine. The cell wall contained meso-diaminopimelic acid. The major fatty acid was C18 : 1cis9 (54.0 %). The strain had one unidentified predominant (91.9 %) quinone that was not menaquinone, methylmenaquinone, demethylmenaquinone, ubiquinone or rhodoquinone. The DNA G+C content was 63 mol%. The data presented in this work show that strain do03T differs from members of the related recognized genera Eggerthella and Denitrobacterium at both the phylogenetic and phenotypic level. Therefore, the strain constitutes a novel genus and species, for which the name Asaccharobacter celatus gen. nov., sp. nov. is proposed. The type strain of the type species is do03T (=JCM 14811T=DSM 18785T=AHU 1763T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain do03T is AB266102.






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