title: Clostridium hiranonis sp. nov., a human intestinal bacterium with bile acid 7alpha-dehydroxylating activity.
abstract: The Clostridium-like organisms TO-931T and HD-17, isolated from human faeces, have high levels of bile acid 7alpha-dehydroxylating activity. Sequencing of their 16S rDNA demonstrated that they belong to cluster XI of the genus Clostridium and that they represent a new and distinct line of descent. Clostridium bifermentans and Clostridium sordellii in cluster XI also possess bile acid 7alpha-dehydroxylating activity. DNA-DNA hybridization experiments with the isolates, TO-931T and HD-17, and C bifermentans and C. sordellii revealed that the isolates are a single species distinct from C. bifermentans and C sordellii. On the basis of phylogenetic analysis, using 16S rDNA sequences, and DNA-DNA hybridization analysis, it is concluded that strains TO-931T and HD-17 are members of a new species of the genus Clostridium, for which the name Clostridium hiranonis is proposed. The type strain is strain TO-931T (= JCM 10541T = DSM 13275T).
authors.forename: M
authors.initials: M
authors.lastname: Kitahara
authors.forename: F
authors.initials: F
authors.lastname: Takamine
authors.forename: T
authors.initials: T
authors.lastname: Imamura
authors.forename: Y
authors.initials: Y
authors.lastname: Benno
mesh_terms: D015373:Bacterial Typing Techniques; D001482:Base Composition; D001647:Bile Acids and Salts / Q000378:metabolism*; D003013:Clostridium / Q000145:classification* / Q000201:enzymology / Q000235:genetics; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D005243:Feces / Q000382:microbiology; D006801:Humans; D006913:Hydroxysteroid Dehydrogenases; D007422:Intestines / Q000382:microbiology*; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010088:Oxidoreductases; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D013250:Steroid Hydroxylases / Q000378:metabolism*
chemical_list: D001647:Bile Acids and Salts; D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S; D010088:Oxidoreductases; D006913:Hydroxysteroid Dehydrogenases; C025376:7 alpha-hydroxysteroid dehydrogenase; D013250:Steroid Hydroxylases