title: Dissection of the genus Actinobaculum: Reclassification of Actinobaculum schaalii Lawson et al. 1997 and Actinobaculum urinale Hall et al. 2003 as Actinotignum schaalii gen. nov., comb. nov. and Actinotignum urinale comb. nov., description of Actinotignum sanguinis sp. nov. and emended descriptions of the genus Actinobaculum and Actinobaculum suis; and re-examination of the culture deposited as Actinobaculum massiliense CCUG 47753T ( = DSM 19118T), revealing that it does not represent a strain of this species.
abstract: The remarkable host specificity of the species of the genus Actinobaculum led us to recharacterize these species by a polyphasic approach. A comparative chemotaxonomic study including analysis of whole-cell sugars, amino acid composition of the peptidoglycan, fatty acid methyl esters, respiratory quinones and polar lipids revealed significant differences that, in combination with molecular data, support a dissection of the genus Actinobaculum. The proposals of this study include the reclassification of Actinobaculum schaalii and Actinobaculum urinale as Actinotignum schaalii gen. nov., comb. nov. (type strain DSM 15541(T) = CCUG 27420(T)) and Actinotignum urinale comb. nov. (type strain DSM 15805(T) = CCUG 46093(T)), respectively. Emended descriptions of the genus Actinobaculum and Actinomyces suis are also provided. The results of 16S rRNA gene sequence analysis and DNA-DNA hybridization also indicated that the type strain of Actinobaculum massiliense deposited as CCUG 47753(T) ( = DSM 19118(T)) should in fact be considered a member of the species Actinobaculum schaalii. In addition, comparative 16S rRNA gene sequencing and DNA-DNA relatedness studies of four strains recovered from clinical materials demonstrated that three of the isolates belonged to Actinotignum schaalii; the remaining strain represents a novel species, for which the name Actinotignum sanguinis sp. nov. is proposed. The type strain is IMMIB L-2199(T) ( = DSM 26039(T) = CCUG 64068(T)).
authors.affiliation: Institut für Medizinische Mikrobiologie und Immunologie der Universität Bonn, Sigmund-Freud-Straße 25, D-53127 Bonn, Germany.
authors.forename: A F
authors.initials: AF
authors.lastname: Yassin
authors.affiliation: Leibniz Institut DSMZ - Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Inhoffenstrasse 7b, D-38124 Braunschweig, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Spröer
authors.affiliation: Leibniz Institut DSMZ - Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Inhoffenstrasse 7b, D-38124 Braunschweig, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Pukall
authors.affiliation: Institut für Biochemie und Molekularbiologie Universitätsklinikum Bonn, Nussallee 11, D-53115 Bonn, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Sylvester
authors.affiliation: Institut für Organische Chemie, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Siering
authors.affiliation: Leibniz Institut DSMZ - Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Inhoffenstrasse 7b, D-38124 Braunschweig, Germany.
authors.forename: P
authors.initials: P
authors.lastname: Schumann
mesh_terms: D000191:Actinomycetaceae / Q000145:classification* / Q000235:genetics; D015373:Bacterial Typing Techniques; D001482:Base Composition; D004269:DNA, Bacterial / Q000235:genetics; D005227:Fatty Acids / Q000737:chemistry; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010457:Peptidoglycan / Q000737:chemistry; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA
chemical_list: D004269:DNA, Bacterial; D005227:Fatty Acids; D010457:Peptidoglycan; D012336:RNA, Ribosomal, 16S