title: Pyramidobacter piscolens gen. nov., sp. nov., a member of the phylum 'Synergistetes' isolated from the human oral cavity.
abstract: Four strains of anaerobic, Gram-negative bacilli isolated from the human oral cavity were subjected to a comprehensive range of phenotypic and genotypic tests and were found to comprise a homogeneous group distinct from any species with validly published names. 16S rRNA and 23S rRNA gene sequence analyses and DNA-DNA reassociation data revealed that the strains constituted a novel group within the phylum 'Synergistetes' and were most closely related to Jonquetella anthropi. Two libraries of randomly cloned DNA were prepared from strain W5455(T) and were sequenced to provide a genome survey as a resource for metagenomic studies. A new genus and novel species, Pyramidobacter piscolens gen. nov., sp. nov., is proposed to accommodate these strains. The genus Pyramidobacter comprises strains that are anaerobic, non-motile, asaccharolytic bacilli that produce acetic and isovaleric acids and minor to trace amounts of propionic, isobutyric, succinic and phenylacetic acids as end products of metabolism. P. piscolens gen. nov., sp. nov. produced hydrogen sulphide but was otherwise largely biochemically unreactive. Growth was stimulated by the addition of glycine to broth media. The G+C content of the DNA of the type strain was 59 mol%. The type strain of Pyramidobacter piscolens sp. nov. is W5455(T) (=DSM 21147(T)=CCUG 55836(T)).
authors.affiliation: King's College London Dental Institute, Infection Research Group, London SE1 9RT, UK.
authors.forename: Julia
authors.initials: J
authors.lastname: Downes
authors.forename: Sonia R
authors.initials: SR
authors.lastname: Vartoukian
authors.forename: Floyd E
authors.initials: FE
authors.lastname: Dewhirst
authors.forename: Jacques
authors.initials: J
authors.lastname: Izard
authors.forename: Tsute
authors.initials: T
authors.lastname: Chen
authors.forename: Wen-Han
authors.initials: WH
authors.lastname: Yu
authors.forename: Iain C
authors.initials: IC
authors.lastname: Sutcliffe
authors.forename: William G
authors.initials: WG
authors.lastname: Wade
mesh_terms: D001421:Bacteria, Anaerobic / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification / Q000502:physiology; D015373:Bacterial Typing Techniques; D001482:Base Composition; D004269:DNA, Bacterial / Q000032:analysis; D004275:DNA, Ribosomal / Q000032:analysis; D005838:Genotype; D005891:Gingivitis / Q000382:microbiology*; D006090:Gram-Negative Bacteria / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification / Q000502:physiology; D016905:Gram-Negative Bacterial Infections / Q000382:microbiology*; D006801:Humans; D008969:Molecular Sequence Data; D009055:Mouth / Q000382:microbiology*; D010514:Periodontal Pocket / Q000382:microbiology*; D010641:Phenotype; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012338:RNA, Ribosomal, 23S / Q000235:genetics; D017422:Sequence Analysis, DNA; D013045:Species Specificity
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S; D012338:RNA, Ribosomal, 23S